MAX8677CETG+-MAX8677CETG+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX8677CETG+ ,1.5A Dual-Input USB/AC Adapter Charger and Smart Power SelectorApplications+Denotes a lead-free package.PDAs, Palmtops, and Wireless Handhelds**EP = Exposed paddl ..
MAX8677CETG+T ,1.5A Dual-Input USB/AC Adapter Charger and Smart Power SelectorFeaturesThe MAX8677C is an integrated 1-cell Li+ charger and♦ Complete Charger and Smart Power Sele ..
MAX8678ETE+ ,White LED Charge Pump with 1.1W Audio AmplifierApplications PART PIN-PACKAGE TOP MARK PKG CODECell Phones and Smartphones16 Thin QFNMAX8678ETE+ AF ..
MAX8678ETE+T ,White LED Charge Pump with 1.1W Audio AmplifierFeaturesThe MAX8678 integrates a charge pump for white light- ♦ High-Efficiency White LED Charge Pu ..
MAX867ESA ,3.3V/5V or Adjustable-Output / Single-Cell DC-DC ConvertersMAX866/MAX86719-0374; Rev 1; 5/963.3V/5V or Adjustable-Output, Single-Cell DC-DC Converters________ ..
MAX867ESA+ ,3.3V/5V or Adjustable Output, Single-Cell DC-DC ConvertersFeaturesThe MAX866 and MAX867 are ultra-small, high-efficiency,♦ 0.8V to 6.0V Input Supply Voltage ..
MB84VD21183EM-70PBS , Stacked MCP (Multi-Chip Package) FLASH MEMORY & SRAM CMOS
MB84VD21194EM-70PBS , Stacked MCP (Multi-Chip Package) FLASH MEMORY & SRAM CMOS
MB84VD22181FM-70PBS , 32M (X16) FLASH MEMORY & 4M (X16) STATIC RAM
MB84VD22182EE-90 ,32M (x 8/x16) FLASH MEMORY & 4M (x 8/x16) STATIC RAMFUJITSU SEMICONDUCTORDS05-50204-2EDATA SHEETStacked MCP (Multi-Chip Package) FLASH MEMORY & SRAMCMO ..
MB84VD22183EE-90 ,32M (x 8/x16) FLASH MEMORY & 4M (x 8/x16) STATIC RAMFEATURES• Power supply voltage of 2.7 to 3.3 V• High performance90 ns maximum access time (Flash)85 ..
MB84VD22184FM-70 , 32M (X16) FLASH MEMORY & 4M (X16) STATIC RAM

MAX8677CETG+-MAX8677CETG+T
1.5A Dual-Input USB/AC Adapter Charger and Smart Power Selector
General Description
The MAX8677C is an integrated 1-cell Li+ charger and
Smart Power Selector™ with dual (DC and USB) power
inputs. It can operate with either separate inputs for
USB and AC adapter power*, or from a single input that
accepts both. All power switches for charging and
switching the load between battery and external power
are included on-chip. No external MOSFETs are
required.
The MAX8677C features a Smart Power Selector to
make the best use of limited USB or adapter power.
The battery charge current and input current limit are
independently set up to 1.5A and 2A, respectively.
Input power not used by the system charges the bat-
tery. USB input current can be set to 100mA or 500mA.
Automatic input selection switches the system load
from battery to external power.
Other features include overvoltage protection (OVP),
charge status and fault outputs, power-OK monitors,
charge timer, and battery thermistor monitor.
Additionally, on-chip thermal limiting reduces the battery
charge rate to prevent overheating. The MAX8677C is
available in a 4mm x 4mm, 24-pin TQFN-EP package.
Applications
PDAs, Palmtops, and Wireless Handhelds
Smart Cell Phones
Portable Media/MP3 Players
GPS Navigation
Digital Cameras
FeaturesComplete Charger and Smart Power SelectorNo External MOSFETs RequiredCommon or Separate USB and Adapter InputsSystem Operates with Discharged or No BatteryAutomatic Adapter/USB/Battery SwitchoverLoad Peaks Over Adapter Rating Are Supported
by BatteryInput Overvoltage Protection to 16V40mΩSystem-to-Battery SwitchThermal Regulation Prevents OverheatingPREQ, CHG, DOK, UOK, and FLTIndicators4.35V (typ) SYS Regulation Voltage
MAX8677C
1.5A Dual-Input USB/AC Adapter Charger
and Smart Power Selector
MAX8677C
FLT
UOK
DOK
SYS
SYS
CHG1716151413
TQFN
(4mm x 4mm x 0.8mm)
PSET
GND
ISET
THM
USUSTSETUSBUSBBATBAT
PEN2PEN1
CENDC
PREQ
Pin Configuration
Ordering Information
ADAPTER
CHARGE AND
SYS LOAD
SWITCH
CHARGE
CURRENT
LOAD
CURRENT
USBUSBBAT
SYS
GNDQ3
BATTERY
SYSTEM
LOAD
MAX8677C
Typical Operating Circuit
19-0781; Rev 0; 4/07
+Denotes a lead-free package.
**EP = Exposed paddle.
PARTTEMP RANGEPIN-
PACKAGE
PKG
CODE
MAX8677CETG+-40°C to +85°C24 TQFN-EP**
(4mm x 4mm)T2444-4
Smart Power Selector is a trademark of Maxim Integrated
Products, Inc.
MAX8677C
1.5A Dual-Input USB/AC Adapter Charger
and Smart Power Selector
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VDC= 5V, THM = CEN= USUS = GND, VBAT = 4V, VPEN1 = VPEN2 = 5V, USB, TSET, PREQ, CHG, DOK, UOK, FLTare unconnected,
TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC, PEN1 to GND .................................................-0.3V to +16V
USB to GND.............................................................-0.3V to +9V
VL to GND................................................................-0.3V to +4V
BAT, SYS, CEN, USUS, PEN2, TSET to GND...........-0.3V to +6V
THM, PSET, ISET, CT to GND.........................-0.3V to VL + 0.3V
PREQ, CHG, DOK, UOK, FLTto GND.....................-0.3V to +6V
EP (exposed paddle) to GND...............................-0.3V to +0.3V
DC Continuous Current (total in 2 pins).........................2.4ARMS
SYS Continuous Current (total in 2 pins)........................2.4ARMS
USB Continuous Current (total in 2 pins).......................2.0ARMS
BAT Continuous Current (total in 2 pins)........................2.4ARMS
Continuous Power Dissipation (TA= +70°C)
(derate 27.8mW/°C above +70°C)...........................2222mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature Range............................-40°C to +125°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERCONDITIONSMINTYPMAXUNITS
DC-TO-SYS PREREGULATOR
DC Operating Range4.16.6V
DC Standoff VoltageVBAT = VSYS = 0V14V
DC Undervoltage ThresholdW hen V DOK g oes l ow , V D C r i si ng , 500m V typ i cal hyster esi s3.954.04.05V
DC Overvoltage ThresholdW hen V DOK g oes hi g h, V D C r i si ng , 360m V typ i cal hyster esi s6.86.97.0V
ISYS = IBAT = 0mA, V CEN = 0V12DC Supply CurrentISYS = IBAT = 0mA, V CEN = 5V0.81.5mA
DC Shutdown CurrentVDC = V CEN = USUS = 5V, VPEN1 = 0V195333µA
DC-to-SYS On-ResistanceISYS = 400mA, V CEN = 5V0.20.35Ω
DC-to-BAT Dropout VoltageWhen SYS regulation and charging stops, VDC falling,
150mV hysteresis105090mV
RPSET= 1.5kΩ180020002200
RPSET = 3kΩ90010001100
RPSET = 6.3kΩ450475500
VPEN1 = 0V, VPEN2 = 5V
(500mA USB mode)450475500
DC Current Limit
(See Table 2 for Input Source
Control)
VDC = 6V, VSYS = 5V,
TA = +25°C
VPEN1 = 0V, VPEN2 = 0V
(100mA USB mode)8095100
PSET Resistance Range1.56.3kΩ
SYS Regulation VoltageVDC = 6V, ISYS = 1mA to 1.75A, V CEN = 5V4.294.354.40V
Connecting DC when no USB present1.5msInput Current Soft-Start TimeConnecting DC with USB present50µs
Thermal-Limit TemperatureDie temperature at which charging and input current limits
are reduced+100°C
Thermal-Limit GainISYS reduction/die temperature (above +100°C)5%/°C
VL VoltageIVL = 0 to 10mA3.03.33.6V
MAX8677C
1.5A Dual-Input USB/AC Adapter Charger
and Smart Power Selector
PARAMETERCONDITIONSMINTYPMAXUNITS
USB-TO-SYS PREREGULATOR
USB Operating Range4.16.6V
USB Standoff VoltageVBAT = VSYS = 0V8V
USB Undervoltage ThresholdWhen V UOK goes low, VUSB rising, 500mV hysteresis3.954.04.05V
USB Overvoltage ThresholdWhen V UOK goes high, VUSB rising, 100mV hysteresis6.86.97.0V
ISYS = IBAT = 0mA, V CEN = 0V, VPEN2 = 0V12USB Supply CurrentISYS = IBAT = 0mA, V CEN = 5V, VPEN2 = 0V0.91.5mA
USB Shutdown CurrentDC = unconnected, VUSB = V CEN = VUSUS = 5V190333µA
USB-to-SYS On-ResistanceDC = unconnected, VUSB = V CEN = 5V, ISYS = 400mA0.20.31Ω
USB-to-BAT Drop-Out VoltageWhen SYS regulation and charging stops, VUSB falling,
250mV hysteresis105090mV
VPEN1 = 0V,
VPEN2 = 5V450475500USB Current Limit
(See Table 2 for Input Source
Control)
DC = unconnected,
VUSB = 5V,
TA = +25°CVPEN1 = 0V,
VPEN2 = 0V8095100
SYS Regulation VoltageDC = unconnected, VUSB = 6V;
ISYS = 1mA to 400mA, V CEN = 5V4.294.354.40V
Input Limiter Soft-Start TimeInput current ramp time50µs
Thermal-Limit Start Temperature+100°C
Thermal-Limit GainISYS reduction/die temperature (above +100°C)5%/°C
VL VoltageDC = unconnected, VUSB = 5V; IVL = 0 to 10mA3.03.33.6V
CHARGER
BAT-to-SYS On-ResistanceVDC = 0V, VBAT = 4.2V, ISYS = 1A0.040.08Ω
BAT-to-SYS Reverse Regulation
VoltageVPEN1 = VPEN2 = 0V, ISYS = 200mA406890mV
TA = +25°C4.1794.24.221BAT Regulation VoltageIBAT = 0mATA = 0°C to +85°C4.1584.24.242V
BAT Recharge ThresholdChange in VBAT from DONE to fast-charge-135-95-45mV
BAT Charge-Current Set RangeRISET = 10kΩ to 2kΩ (Note 2)0.31.5A
RISET = 2.4kΩ112512501375
RISET = 4kΩ675750825
RISET = 10kΩ270300330
RISET = 4kΩ, VBAT = 2.5V
(prequal mode)5075.0100
RISET = 6.2kΩ, VBAT = 2.5V
(prequal mode)234873
BAT Charge-Current Accuracy,
Charger Loop in Control
VSYS = 5.5V,
TA = 0°C to +85°C
RISET = 10kΩ, VBAT = 2.5V
(prequal mode)30
ELECTRICAL CHARACTERISTICS (continued)
(VDC= 5V, THM = CEN= USUS = GND, VBAT = 4V, VPEN1 = VPEN2 = 5V, USB, TSET, PREQ, CHG, DOK, UOK, FLTare unconnected,
TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
MAX8677C
1.5A Dual-Input USB/AC Adapter Charger
and Smart Power Selector
ELECTRICAL CHARACTERISTICS (continued)
(VDC= 5V, THM = CEN= USUS = GND, VBAT = 4V, VPEN1 = VPEN2 = 5V, USB, TSET, PREQ, CHG, DOK, UOK, FLTare unconnected,
TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITS
ISET VoltageRISET = 4kΩ, IBAT = 500mA
(VISET = 1.5V at full charge current)0.91.01.1V
Charger Soft-Start TimeCharge-current ramp time1.5ms
BAT Prequal ThresholdVBAT rising, 180mV hysteresis2.933.1V
No DC or USB power connected36BAT Leakage CurrentVBAT = 4.2VDC or USB connected, V CEN = 5V36µA
VTSET = 05
VTSET = open10DONE Threshold as a
Percentage of Fast-ChargeIBAT decreasing
VTSET = VL15
Maximum Prequal TimeFrom V CEN falling to end of prequal charge,
VBAT = 2.5V, CT = 0.068µF30Min
Maximum Fast-Charge TimeFrom V CEN falling to VFLT falling, CT = 0.068µF300Min
Timer AccuracyCT = 0.068µF-20+20%
Timer Extend ThresholdPercentage of fast-charge current below which timer
clock operates at half speed50%
Timer Suspend ThresholdPercentage of fast-charge current below which timer
clock pauses20%
THM
THM Threshold, ColdWhen charging is suspended, 2% hysteresis727476% of VL
THM Threshold, HotWhen charging is suspended, 2% hysteresis262830% of VL
THM Threshold, DisabledWhen THM function is disabled3% of VL
THM = GND or VL; TA = +25°C-0.10.001+0.2THM Input LeakageTHM = GND or VL; TA = +85°C0.01µA
LOGIC I/O: CHG, FLT, PREQ, DOK, UOK, PEN1, PEN2, CEN, TSET, USUS
High level1.3
Low level0.4VLogic Input Thresholds
Hysteresis50mV
High levelVL - 0.3
Midlevel1.2VL - 1.2TSET Input Threshold
Low level0.3
TSET = GND-20-6TSET Input-Bias CurrentTSET = VL620µA
TA = +25°C0.0011Logic Input-Leakage CurrentVINPUT = 0 to 5.5VTA = +85°C0.01µA
Logic Output Voltage, LowSinking 1mA25100mV
TA = +25°C0.0011Logic Output-Leakage Current,
HighVOUT = 5.5VTA = +85°C0.01µA
Note 1:Limits are 100% production tested at TA= +25°C. Limits over the operating temperature range are guaranteed by design.
Note 2:Guaranteed by design.
MAX8677C
1.5A Dual-Input USB/AC Adapter Charger
and Smart Power Selector
Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
USB QUIESCENT CURRENT
vs. USB VOLTAGE (CHARGER ENABLED)
MAX8677C toc01
USB VOLTAGE (V)
USB QUIESCENT CURRENT (mA)645231
VBAT = 4.2, VUSUS = 0V
EXITING UVLO
ENTERING OVLO
CHARGER IN
DONE MODE
ISYS = 0V
PEN1 = X, PEN2 = 1
VUSB RISING
VUSB FALLING
USB QUIESCENT CURRENT
vs. USB VOLTAGE (CHARGER DISABLED)
MAX8677C toc02
USB VOLTAGE (V)
USB QUIESCENT CURRENT (mA)645231
VBAT = 4.2, VUSUS = 0V
EXITING UVLO
ENTERING OVLO
CEN = 1
ISYS = 0V
PEN1 = X, PEN2 = 1
VUSB RISING
VUSB FALLING
USB QUIESCENT CURRENT
vs. USB VOLTAGE (SUSPEND)
MAX8677C toc03
USB VOLTAGE (V)
USB QUIESCENT CURRENT (mA)645231
VBAT = 4.2, USUS = 1
PEN1 = X, PEN2 = 1
BATTERY LEAKAGE CURRENT
vs. BATTERY VOLTAGE (USB DISCONNECTED)
MAX8677C toc04
BATTERY VOLTAGE (V)
BATTERY LEAKAGE CURRENT (231
USB = OPEN
BATTERY LEAKAGE CURRENT
vs. TEMPERATURE
MAX8677C toc05
TEMPERATURE (°C)
BATTERY LEAKAGE CURRENT (851035-15
VBAT = 4V
BATTERY LEAKAGE CURRENT
vs. BATTERY VOLTAGE (USB CONNECTED)
MAX8677C toc06
BATTERY VOLTAGE (V)
BATTERY LEAKAGE CURRENT (231
VUSB = 5V
USUS = 1
CEN = 1
CHARGE CURRENT
vs. BATTERY VOLTAGE (100mA USB)
MAX8677C toc07
BATTERY VOLTAGE (V)
CHARGE CURRENT (mA)231
VUSB = 5V
PEN1 = X , PEN2 = 1
VBAT RISING
VBAT FALLING
CHARGE CURRENT
vs. BATTERY VOLTAGE (500mA USB)
MAX8677C toc08
BATTERY VOLTAGE (V)
CHARGE CURRENT (mA)231
VUSB = 5V
PEN1 = X, PEN2 = 1
VBAT RISING
VBAT FALLING
CHARGE CURRENT
vs. BATTERY VOLTAGE (1ADC)
MAX8677C toc09
BATTERY VOLTAGE (V)
CHARGE CURRENT (A)231
VDC = 5V
PEN1 = 1 , PEN2 = X
VBAT RISING
VBAT FALLING
MAX8677C
1.5A Dual-Input USB/AC Adapter Charger
and Smart Power Selector
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
SYS OUTPUT VOLTAGE
vs. USB VOLTAGE
MAX8677C toc12
VUSB (V)
SYS
(V)567231
VBAT = 4V
NO SYS LOAD
SYS OUTPUT VOLTAGE
vs. DC VOLTAGE
MAX8677C toc13
VDC (V)
SYS
(V)41486122
VBAT = 4V
NO SYS LOAD
SYS OUTPUT VOLTAGE vs. SYS OUTPUT
CURRENT (USB AND DC DISCONNECTED)
MAX8677C toc14
SYS
(V)
ISYS (A)
VBAT = 4V
THE SLOPE OF THIS LINE
SHOWS THAT THE BAT-TO-SYS
RESISTANCE IS 40mΩ
SYS OUTPUT VOLTAGE
vs. SYS OUTPUT CURRENT (DC)
MAX8677C toc15
SYS
(V)
ISYS (A)
VBAT = 4V
PEN1 = 1, PEN2 = X
CEN = 1
SYS OUTPUT VOLTAGE
vs. SYS OUTPUT CURRENT
MAX8677C toc16
SYS
(V)
ISYS (A)
VBAT = 4V
VUSB = 5V
PEN1 = X
CEN = 1
100mA
500mA USB
VL OUTPUT VOLTAGE
vs. DC VOLTAGE
MAX8677C toc17
(V)
VDC (V)
IVL = 0mA
IVL = 10mA
NORMALIZED CHARGE CURRENT vs. AMBIENT
TEMPERATURE (LOW IC POWER DISSIPATION)
MAX8677C toc10
AMBIENT TEMPERATURE (°C)
NORMALIZED CHARGE CURRENT851035-15
VUSB = 5V, VBAT = 4V
BATTERY REGULATION VOLTAGE
vs. TEMPERATURE
MAX8677C toc11
TEMPERATURE (°C)
BATTERY REGULATION VOLTAGE (V)851035-15
40ppm/°C
MAX8677C
1.5A Dual-Input USB/AC Adapter Charger
and Smart Power Selector
CHARGE PROFILE —1400mAh BATTERY
ADAPTER INPUT—1A CHARGE
MAX8677C toc18
BAT
(V)
IBAT
(A)
TIME (min)
VBAT
IBAT
CHARGE PROFILE —1400mAh BATTERY
USB INPUT—500mA CHARGE
MAX8677C toc19
BAT
(V)
IBAT
(A)
TIME (min)
VBAT
IBAT
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
DC CONNECT WITH USB CONNECTED
(RSYS = 25Ω)
MAX8677C toc20
200μs/div
VSYS
IDC
IUSB
IBAT
500mA/div
500mA/div
500mA/div
2V/divCDC CHARGINGCSYS CHARGING
3.6V3.68V
4.35V
500mA
500mA
-335mA-330mA
NEGATIVE BATTERY CURRENT
FLOWS INTO THE BATTERY
(CHARGING)
BATTERY
CHARGER
SOFT-START
DC CONNECT WITH NO USB
(RSYS = 25Ω)
MAX8677C toc21
400μs/div
VBAT
VSYS
IDC
IBAT
500mA/div
500mA/div
CDC
CHARGING
CSYS CHARGING
3.6V3.6V
-1A
1.2A
120mA
4.35V
NEGATIVE BATTERY
CURRENT FLOWS INTO
THE BATTERY (CHARGING)
BATTERYCHARGER
SOFT-START
DC DISCONNECT WITH NO USB
(RSYS = 25Ω)
MAX8677C toc22
20μs/div
VSYS
IDC
IBAT
500mA/div
500mA/div
3.6V
0.2A
-1A
1.2A
4.35V
NEGATIVE BATTERY
CURRENT FLOWS INTOTHE BATTERY (CHARGING)
USB CONNECT WITH NO DC
(RSYS = 20Ω)
MAX8677C toc23
200μs/div
VUSB
IUSB
VSYS
IBAT
500mA/div
500mA/div
5V/div
5V/div
10V/divCUSB CHARGINGCSYS CHARGING
4.3V
-300mA
500mA
155mA
3.6V4.35V
BATTERY
CHARGER SOFT-START
VUOK
VCHG
MAX8677C
1.5A Dual-Input USB/AC Adapter Charger
and Smart Power Selector
USB DISCONNECT WITH NO DC
(RSYS = 20Ω)
MAX8677C toc24
200μs/div
VUSB
IUSB
VSYS
IBAT
500mA/div
1A/div
5V/div
5V/div
10V/div
-300mA
475mA
120mA
3.6V3.7V
VUOK
VCHG
USB SUSPEND
MAX8677C toc25
200μs/div
VUSUS
IUSB
VSYS
IBAT
500mA/div
500mA/div
5V/div
5V/div
-500mA0A0V
3.6V3.7V
500mA
VCHG
USB RESUME
MAX8677C toc26
200μs/div
VUSUS
IUSB
VSYS
IBAT
500mA/div
500mA/div
5V/div
5V/div
3.6V
4.35V3.7V
-500mA
500mA
VCHG
CUSB CHARGING
BATTERY
CHARGER SOFT-START
Pin Description
PINNAMEFUNCTIONPREQCharge Prequal Output. Active-low, open-drain output pulls low when the charger enters the prequal state.
See Figure 5.
2, 3DC
DC Power Input. DC is capable of delivering up to 2A to SYS. DC supports both AC adapter and USB inputs. The
DC current limit is set with PEN1, PEN2, USUS, and RPSET. See Table 2. Both DC pins must be connected
together externally.CENCharger Enable Input. Connect CEN to GND to enable battery charging when a valid source is connected at DC
or USB. Connect to VL or drive high with a logic signal to disable battery charging.PEN1DC Input Limit Control. If PEN1 is high, the DC input current limit is 3000/RPSET. If PEN1 is low, the DC limit is set
by PEN2 and USUS. See Table 2.
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
MAX8677C
1.5A Dual-Input USB/AC Adapter Charger
and Smart Power Selector
Pin Description (continued)
PINNAMEFUNCTIONPEN2USB High/Low Control. PEN2 sets the DC or USB current limit to 100mA (PEN2 low) or 500mA (PEN2 high).
PEN2 controls both DC and USB current limits when PEN1 is low. See Table 2.PSETDC Input Current-Limit Set. Connect a resistor to ground to program the DC current limit to 3000/RPSET.
8VLLogic LDO Output. VL is the output of an LDO that powers the MAX8667C internal circuitry. VL also provides
3.3V at up to 10mA to power external circuitry. Connect a 0.1µF capacitor from VL to GND.GNDGroundCTCharge Timer Program Pin. A capacitor from CT to GND sets the fast-charge (tFSTCHG) and prequal (tPREQUAL)
fault timers. Connect to GND to disable the timer.ISETCharge Current Set Input. A resistor (RISET) from ISET to GND programs the maximum charge current up to 1.5A.
The prequal charge current is 10% of the set maximum charge current.THM
Thermistor Input. Connect a negative temperature coefficient (NTC) thermistor that has good thermal contact
with the battery from THM to GND. Connect a resistor equal to the thermistor +25°C resistance from THM to VL.
Charging is suspended when the thermistor is outside the hot and cold limits. Connect THM to GND to disable
the thermistor temperature sensor.USUSUSB Suspend Input. With PEN1 low, driving USUS high turns off both the USB and DC inputs. With PEN1 high,
driving USUS high turns off only the USB input. See Table 2.TSETTermination Current Set Pin. Connect to GND, leave open, or connect to VL for a 5%, 10%, or 15% (of ICHGMAX)
termination current (ITERM) threshold.
15, 16USBUSB Power Input. USB is capable of delivering up to 0.5A to SYS. The USB current limit is set with PEN2 and
USUS. See Table 2. Both USB pins must be connected together externally.
17, 18BAT
Battery Connection. Connect to a single-cell Li+ battery. The battery charges from SYS when a valid source is
present at DC or USB. BAT powers SYS when neither DC nor USB power is present, or when the SYS load
exceeds the input current limit. Both BAT pins must be connected together externally.CHGCharger Status Output. Active-low, open-drain output pulls low when the battery is in fast-charge or prequal.
Otherwise, CHG is high impedance.
20, 21SYS
System Supply Output. SYS is connected to BAT through an internal 40mΩ system load switch when DC or USB
is invalid, or when the SYS load is greater than the input current limit.
When a valid voltage is present at DC or USB, SYS is limited to 4.35V. When the system load (ISYS) exceeds theC or U S B cur r ent l i m i t, S Y S i s r eg ul ated to 68m V b el ow BAT, and b oth the U S B i np ut and the b atter y ser vi ce S Y S .
Bypass SYS to GND with a 10µF X5R or X7R ceramic capacitor. Both SYS pins must be connected together
externally.DOKDC Power-OK Output. Active-low, open-drain output pulls low when a valid input is detected at DC.UOKUSB Power-OK Output. Active-low, open-drain output pulls low when a valid input is detected at USB.FLTFault Output. Active-low, open-drain output pulls low when the battery timer expires before prequal or
fast-charge complete.
—EPExposed Paddle. Connect the exposed paddle to GND. Connecting the exposed paddle does not remove the
requirement for proper ground connections to the appropriate pins.
MAX8677C
1.5A Dual-Input USB/AC Adapter Charger
and Smart Power Selector
MAX8677CDC POWER
MANAGEMENT
CURRENT-
LIMITED
VOLTAGE
REGULATOR
SET
INPUT
LIMIT
THERMISTOR
MONITOR
(SEE FIGURE 7)
CHARGE
TERMINATION
AND MONITOR
CHARGE
TIMER
PWR
USB POWER
MANAGEMENT
CURRENT-
LIMITED
VOLTAGE
REGULATOR
CHARGER
CURRENT-
VOLTAGE
CONTROLBAT+
BAT-
NTC
INPUT AND
CHARGER
CURRENT LIMIT
SET LOGIC
THERMAL
REGULATION
SET
INPUT
LIMIT
PSET
USUS
PEN2
PEN1
USBUSB
UOK
DC MODE
500mA
100mAUSB
LIMITUSB
SUSPEND
LIMIT
PWR
Li+ BATTERY CHARGER
AND SYS LOAD SWITCH
SYS
ISET
BAT
THM
CHG
PREQ
VL = 15%
SYSTEM
LOAD
N.C. = 10%
TSET
FLT
CEN
GND
DOKAC
ADAPTER
Figure 1. Block Diagram
Circuit Description
The MAX8677C contains an Li+ battery charger, as
well as power MOSFETs and control circuitry to man-
age power flow in portable devices. See Figure 1. The
charger has two power inputs, DC and USB. These can
be separately connected to an AC adapter output and
a USB port, or the DC input can be a single power
input that connects to either an adapter or USB. Logic
inputs, PEN1 and PEN2, select the correct current limits
MAX8677C
1.5A Dual-Input USB/AC Adapter Charger
and Smart Power Selector
MAX8677CPREQ1FLT
RPU
560kΩ
PREQUAL
CDC
4.7μF
ADAPTER
TO VL
RPU
3X 560kΩ
FAULT
OUTPUT
USB PWR
DC PWR
TO SYSTEM
LOAD
CHARGE
INDICATOR
1-CELL
Li+
VBUS
TO VL
560kΩ
USB2UOK233DOK22
CEN4OFF
CHARGE ON
SYS21
PEN15SYS20
PEN26CHG19
PSET
RPSET
RISET
10kΩBAT188BAT17
GND9USB1610USB15
ISET11TSET14
THM12USUS13
CSYS
10μF
CBAT
4.7μF
CUSB
4.7μF
GND
USB SUSPEND
TO VL: ITERM = 15%
OPEN: ITERM = 10%
GND: ITERM = 5%
500mA
0.1μF
0.068μF
NTC
10kΩ
+25°C
100mA
Figure 2. Typical Application Circuit Using Separate DC and USB Connectors
for two-input or single-input operation. Figure 2 is the
typical application circuit using separate DC and USB
connectors. Figure 3 is the typical application circuit
using a Mini 5-style connector or other DC/USB com-
mon connector.
In addition to charging the battery, the MAX8677C also
supplies power to the system through the SYS output.
The charging current is also provided from SYS so that
the set input current limit controls the total SYS current,
which is the sum of the system load current and the
battery-charging current. SYS is powered from either
the DC input pin or the USB input pin. If both the DC
and USB are connected, DC takes precedence.

Partno	Mfg	Dc	Qty	Available	Descript
MAX8677CETG+ \|MAX8677CETG	MAXIM	N/a	6650	avai	1.5A Dual-Input USB/AC Adapter Charger and Smart Power Selector
MAX8677CETG+T \|MAX8677CETGT	MAX	N/a	351	avai	1.5A Dual-Input USB/AC Adapter Charger and Smart Power Selector