MAX1795EUA+-MAX1795EUA+T-MAX1796EUA+-MAX1797EUA+-MAX1797EUA+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1796EUA+ ,Low-Supply Current, Step-Up DC-DC Converters with True ShutdownApplications● Portable Digital Audio Players● PDAs/Palmtops● Wireless Handsets● Portable TerminalsP ..
MAX1796EUA+ ,Low-Supply Current, Step-Up DC-DC Converters with True ShutdownMAX1795/MAX1796/ Low-Supply Current, Step-Up DC-DC Converters MAX1797 with True Shutdown
MAX1797EUA ,Low Supply Current, Step-Up DC-DC Converters with True-ShutdownFeaturesThe MAX1795/MAX1796/MAX1797 are high efficiency >95% Efficiencystep-up DC-DC converters in ..
MAX1797EUA+ ,Low-Supply Current, Step-Up DC-DC Converters with True Shutdownapplications. ● LBI/LBO Comparator Enabled in ShutdownFor additional in-system flexibility, a batte ..
MAX1797EUA+ ,Low-Supply Current, Step-Up DC-DC Converters with True ShutdownFeaturesThe MAX1795/MAX1796/MAX1797 are high-efficiency, ● > 95% Efficiencystep-up DC-DC converters ..
MAX1797EUA+T ,Low-Supply Current, Step-Up DC-DC Converters with True ShutdownElectrical Characteristics(V = +2V, OUT = FB (V = +3.3V), SHDN = LBI = GND, T = 0°C to +85°C, unles ..
MAX4642EUA ,High-Speed, Low-Voltage, 4з, Dual SPST CMOS Analog SwitchesApplications Low Power Consumption: < 0.01µWBattery-Operated EquipmentOrdering InformationAudio an ..
MAX4642EUA ,High-Speed, Low-Voltage, 4з, Dual SPST CMOS Analog SwitchesELECTRICAL CHARACTERISTICS—Single +5V Supply(V+ = +4.5V to +5.5V, V = 2.4V, V = 0.8V, T = T to T , ..
MAX4642EUA+ ,High-Speed, Low-Voltage, 4 Ohm, Dual SPST CMOS Analog SwitchesELECTRICAL CHARACTERISTICS—Single +5V Supply (continued)(V+ = +4.5V to +5.5V, V = 2.4V, V = 0.8V, T ..
MAX4642EUA+T ,High-Speed, Low-Voltage, 4 Ohm, Dual SPST CMOS Analog SwitchesMAX4641/MAX4642/MAX464319-1656; Rev 1; 2/02High-Speed, Low-Voltage, 4Ω, Dual SPSTCMOS Analog Switch ..
MAX4643 ,High-Speed, Low-Voltage, 4Applications♦ Low Power Consumption: < 0.01µWBattery-Operated EquipmentOrdering InformationAudio an ..
MAX4643EUA ,High-Speed, Low-Voltage, 4з, Dual SPST CMOS Analog SwitchesFeaturesThe MAX4641/MAX4642/MAX4643 are monolithic, dual, +1.8V to +5.5V Single-Supply Operations ..

MAX1795EUA+-MAX1795EUA+T-MAX1796EUA+-MAX1797EUA+-MAX1797EUA+T
Low-Supply Current, Step-Up DC-DC Converters with True Shutdown
General Description
The MAX1795/MAX1796/MAX1797 are high-efficiency,
step-up DC-DC converters intended for small portable
hand-held devices. These devices feature Maxim’s True
Shutdown™ circuitry, which fully disconnects the out-
put from the input in shutdown, improves efficiency,
and eliminates costly external components. All three
devices also feature Maxim’s proprietary LX-damping
circuitry for reduced EMI in noise-sensitive applications.
For additional in-system flexibility, a battery monitoring
comparator (LBI/LBO) remains active even when the
DC-DC converter is in shutdown.
The input voltage range is +0.7V to VOUT, where VOUT
can be set from +2V to +5.5V. Startup is guaranteed
from +0.85V. The MAX1795/MAX1796/MAX1797 have a
preset, pin-selectable 5V or 3.3V output. The output can
also be adjusted to other voltages, using two external
resistors. The three devices differ only in their current
limits, allowing optimization of external components for
different loads: The MAX1795, MAX1796, and MAX1797
have current limits of 0.25A, 0.5A, and 1A, respectively. All devices are packaged in a compact, 8-pin μMAX
package that is only 1.09mm tall and half the size of an
8-pin SO.
Applications●Portable Digital Audio Players●PDAs/Palmtops●Wireless Handsets●Portable Terminals
Features●> 95% Efficiency●True-Shutdown Circuitry Output Disconnects from Input in Shutdown No External Schottky Diode Needed●25μA Quiescent Supply Current●Low-Noise Antiringing Feature●LBI/LBO Comparator Enabled in Shutdown●2μA Shutdown Current●8-Pin μMAX Package
True Shutdown is a trademark of Maxim Integrated Products.
Pin ConigurationTypical Operating Circuit
Ordering Information
PARTTEMP RANGEPIN-PACKAGE
MAX1795EUA-40°C to +85°C8 μMAX
MAX1796EUA-40°C to +85°C8 μMAX
MAX1797EUA-40°C to +85°C8 μMAX
BATT
OUT
GND
LBO
LBI
MAX1795
MAX1796
MAX1797
µMAX
TOP VIEW
SHDN
GND
LBI
LBO
BATT
OUT
SHDN
OUT
0.7V TO
5.5V
OFF
MAX1795
MAX1796
MAX1797
MAX1795/MAX1796/
MAX1797
Low-Supply Current, Step-Up DC-DC Converters
with True Shutdown
OUT, LX, SHDN, LBI, LBO, BATT to GND ..............-0.3V to +6V
FB ...........................................................-0.3V to (VOUT + 0.3V)
ILX, IOUT .............................................................................±1.5A
Output Short-Circuit Duration ..................................................5s
Continuous Power Dissipation 8-Pin μMAX (derate 4.1mW/°C above +70°C) ............330mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
(VBATT = +2V, OUT = FB (VOUT = +3.3V), SHDN = LBI = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°C.)
Absolute Maximum Ratings
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.
Electrical Characteristics
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Minimum Input VoltageAfter startup0.7V
Operating VoltageVBATT(Note 1)1.05.5V
Startup VoltageTA = +25°C, RL = 3kΩ0.851.0V
Startup Voltage Tempco-2.2mV/°C
Output VoltageVOUT
FB = OUT3.173.33.43
FB = GND4.805.05.20
Adjustable Output Voltage Range2.05.5V
Steady-State Output CurrentIOUT
BATT = +2V,
FB = OUT
(VOUT = +3.3V)
MAX1795100180
MAX1796200300
MAX1797400550
BATT = +2V,
FB = GND
(VOUT = +5.0V)
MAX179550120
MAX1796100200
MAX1797250370
Feedback Set-Point Voltage
(Adjustable Mode)VFBVOUT = +2V to +5.5V1.201.241.28V
Feedback Input CurrentIFBVFB = +1.24V4100nA
Internal NFET, PFET
On-ResistanceRDS(ON)VOUT = +3.3V,
ILX = 100mA
NFET0.170.3Ω
PFET0.270.45
LX Switch Current Limit
(NFET only)ILIM
MAX17950.20.250.35MAX17960.40.50.625
MAX17970.81.01.25
LX Leakage CurrentILEAKVLX = 0 and +5.5V, VOUT = +5.5V0.2µA
Synchronous Rectiier Turn-Off
Current Limit25mA
Damping Switch On-ResistanceRDAMP100200400Ω
Operating Current into OUT
MAX1795/MAX1796/
MAX1797
Low-Supply Current, Step-Up DC-DC Converters
with True Shutdown
(VBATT = +2V, OUT = FB (VOUT = +3.3V), SHDN = LBI = GND, TA = -40°C to +85°C, unless otherwise noted.) (Note 3)
(VBATT = +2V, OUT = FB (VOUT = +3.3V), SHDN = LBI = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°C.)
Electrical Characteristics
Electrical Characteristics (continued)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Operating Current into BATTVFB = +1.4V, VLBI = +1V24µA
Shutdown Current into BATTSHDN = BATT, VLBI = +1V24µA
LX Switch MaxImum On-TimetONVFB = +1V, if current limit not reached345µs
LX Switch Minimum Off-TimetOFFVFB = +1V0.811.2µs
LBI Threshold Voltage FallingVLBIVBATT = +2V0.80.850.90V
VBATT = LBI0.8750.9250.975
LBI Hysteresis25mV
LBI Input CurrentILBIVLBI = +0.8V9100nA
LBO Low Output Voltage
VBATT = VLBI = +0.975V,sinking 20µA (50Ω typ)0.1
VBATT = VLBI = +1.1V,sinking 100µA (25Ω typ)0.1
LBO Off-Leakage CurrentVLBO = +5.5V1100nA
SHDN Input Voltage
VIL0.2 x
VBATT
VIH0.8 x
VBATT
Shutdown Input CurrentVSHDN = 0 and +5.5V100nA
PARAMETERSYMBOLCONDITIONSMINMAXUNITS
Operating VoltageVBATTNote 11.05.5V
Output VoltageVOUT
FB = OUT3.133.47
FB = GND4.755.25
Adjustable Output Voltage Range2.05.5V
Steady-State Output Current
(Note 1)IOUT
FB = OUT
(VOUT = +3.3V)
MAX1795100
MAX1796200
MAX1797400
FB = GND
(VOUT = +5.0V)
MAX179560
MAX1796125
MAX1797250
Feedback Set-Point Voltage
(Adjustable Mode)VFBVOUT = +2V to +5.5V1.191.29V
Feedback Input CurrentIFBVFB = +1.25V100nA
MAX1795/MAX1796/
MAX1797
Low-Supply Current, Step-Up DC-DC Converters
with True Shutdown
(VBATT = +2V, OUT = FB (VOUT = +3.3V), SHDN = LBI = GND, TA = -40°C to +85°C, unless otherwise noted.) (Note 3)
Note 1: Operating Voltage: Since the regulator is bootstrapped to the output, once started it will operate down to a 0.7V input.
Note 2: Device is bootstrapped (power to IC comes from OUT). This correlates directly with the actual battery supply current.
Note 3: Specifications to -40°C are guaranteed by design, not production tested.
PARAMETERSYMBOLCONDITIONSMINMAXUNITS
Internal NFET, PFET
On-ResistanceRDS(ON)VOUT = +3.3V,
ILX = 100mA
NFET0.3Ω
PFET0.45
LX Switch Current Limit
(NFET only)ILIM
MAX17950.190.37MAX17960.350.7
MAX17970.81.32
LX Leakage CurrentILEAKVLX = 0 and +5.5V, VOUT = +5.5VµA
Damping Switch On-ResistanceRDAMP100400Ω
Operating Current into OUT
(Note 2)VFB = +1.4V45µA
Operating Current into BATTVFB = +1.4V, VLBI = +1V4µA
Shutdown Current into BATTSHDN = BATT, VLBI = +1V4µA
LX Switch Maximum On-TimetONVFB = +1V, if current limit not reached2.755.25µs
LX Switch Minimum Off-TimetOFFVFB = +1V0.71.3µs
LBI Threshold VoltageVLBI
VBATT = +2V0.80.90
VBATT = LBI0.8750.975
LBI Input CurrentILBIVLBI = +0.8V100nA
LBO Low Output Voltage
VBATT = VLBI = +0.975V,sinking 20µA (50Ω typ)0.1
VBATT = VLBI = +1.1V,sinking 100µA (25Ω typ)0.1
LBO Off-Leakage CurrentVLBO = +5.5V100nA
SHDN Input Voltage
VIL0.2 x
VBATT
VIH0.8 x
VBATT
Shutdown Input CurrentVSHDN = 0 and +5.5V100nA
Electrical Characteristics (continued)
MAX1795/MAX1796/
MAX1797
Low-Supply Current, Step-Up DC-DC Converters
with True Shutdown
(L = 22μH, CIN = 47μF, COUT = 47μF, TA = +25°C, unless otherwise noted.)Typical Operating Characteristics
MAX1795
EFFICIENCY vs. LOAD CURRENT (+5V)
MAX1795/96/97 toc01
LOAD CURRENT (mA)
EFFICIENCY (%)40
VBATT = +2.4VVBATT = +1.2V
VBATT = +3.6V
MAX1796
EFFICIENCY vs. LOAD CURRENT (+3.3V)
MAX1795/96/97 toc04
LOAD CURRENT (mA)
EFFICIENCY (%)40
VBATT = +1.2V
VBATT = +2.4V
NO-LOAD BATTERY CURRENT
vs. INPUT BATT VOLTAGE
BATTERY CURRENT (µA)
MAX1795/96/97 toc07
VOUT = +3.3V
VOUT = +5V
MAX1795
EFFICIENCY vs. LOAD CURRENT (+3.3V)
MAX1795/96/97 toc02
LOAD CURRENT (mA)
EFFICIENCY (%)40
VBATT = +1.2V
L = 10µH
VBATT = +2.4V
MAX1797
EFFICIENCY vs. LOAD CURRENT (+5V)
MAX1795/96/97 toc05
LOAD CURRENT (mA)
EFFICIENCY (%)40VBATT = +3.6V
VBATT = +2.4V
VBATT = +1.2V
STARTUP VOLTAGE
vs. LOAD CURRENT
MAX1795/96/97 toc08
EFFICIENCY (%)
VOUT = +3.3V
MAX1796
EFFICIENCY vs. LOAD CURRENT (+5V)
MAX1795/96/97 toc03
LOAD CURRENT (mA)
EFFICIENCY (%)40
VBATT = +1.2VVBATT = +2.4V
VBATT = +3.6V
MAX1797
EFFICIENCY vs. LOAD CURRENT (+3.3V)
MAX1795/96/97 toc06
LOAD CURRENT (mA)
EFFICIENCY (%)40
VBATT = +2.4V
VBATT = +1.2V
SHUTDOWN THRESHOLD
vs. INPUT BATT VOLTAGE
SHUTDOWN THRESHOLD (V)
MAX1795/96/97 toc09
MAX1795/MAX1796/
MAX1797
Low-Supply Current, Step-Up DC-DC Converters
with True Shutdown
(L = 22μH, CIN = 47μF, COUT = 47μF, TA = +25°C, unless otherwise noted.)Typical Operating Characteristics (continued)
LOW-BATTERY INPUT THRESHOLD
vs. INPUT BATT VOLTAGE
BATT VOLTAGE (V)
LOW-BATTERY INPUT THRESHOLD (V)
MAX1795/96/97 toc10
INCREASING VLBI
DECREASING VLBI
MAX1796
MAXIMUM OUTPUT CURRENT
vs. BATT INPUT VOLTAGE
MAX1795/96/97 toc13
BATT VOLTAGE (V)
LOAD CURRENT (mA)VOUT = +5.0V
VOUT = +3.3V
MAX1795/96/97 toc14
BATT VOLTAGE (V)
LOAD CURRENT (mA)
MAX1797
MAXIMUM OUTPUT CURRENT
vs. BATT INPUT VOLTAGE
VOUT = +3.3V
VOUT = +5.0V
OUT LEAKAGE CURRENT
vs. OUTPUT VOLTAGE
MAX1795/96/97 toc15
OUT LEAKAGE CURRENT (A)
SHDN = BATT
VOUT = +5V
VBATT = +2.4V
OUT BIASED WITH
EXTERNAL VOLTAGE
SOURCE
HEAVY-LOAD SWITCHING WAVEFORMS
MAX1795/96/97 toc16
VLX
5V/div
IINDUCTOR
500mA/div
VOUT
(AC-COUPLED)
100mV/div
MAX1795/96/97 toc11
TEMPERATURE (°C)
LOW-BATTERY INPUT THRESHOLD (V)
LOW-BATTERY INPUT THRESHOLD
vs. TEMPERATURE
VBATT = +3.6V
INCREASING VLBI
DECREASING VLBI0.850
MAX1795
MAXIMUM OUTPUT CURRENT
vs. BATT INPUT VOLTAGE
MAX1795/96/97 toc12
BATT VOLTAGE (V)
LOAD CURRENT (mA)
VOUT = +5.0V
VOUT = +3.3V
MAX1795/MAX1796/
MAX1797
Low-Supply Current, Step-Up DC-DC Converters
with True Shutdown
(L = 22μH, CIN = 47μF, COUT = 47μF, TA = +25°C, unless otherwise noted.)Typical Operating Characteristics (continued)
20µs/div
LIGHT-LOAD SWITCHING WAVEFORMS
MAX1795/96/97 toc17
VLX
5V/div
IINDUCTOR
500mA/div
VOUT
(AC-COUPLED)
100mV/div
VBATT = +3.6V
VOUT = +5.0V
ILOAD = 40mA
LOAD-TRANSIENT RESPONSE
MAX1795/96/97 toc19
IOUT
100mA/div
VOUT
100mV/div
40µs/div
VBATT = +2.4V
VOUT = +3.3V
ILOAD = 0 TO 325mA
10µs/div
LINE-TRANSIENT RESPONSE
MAX1795/96/97 toc18
VBATT
+2.7V TO +3V
VOUT
(AC-COUPLED)
20mV/div
VBATT = +2.7V TO +3V
VOUT = +5.0V
NO LOAD
STARTUP-SHUTDOWN WAVEFORMS
MAX1795/96/97 toc20
VSHDN
5V/div
IINDUCTOR
500mA/div
VOUT
2V/div
2ms/div
VBATT = +2.4V
VOUT = +5.0V
ILOAD = 200mA
MAX1795/MAX1796/
MAX1797
Low-Supply Current, Step-Up DC-DC Converters
with True Shutdown

Partno	Mfg	Dc	Qty	Available	Descript
MAX1795EUA+ \|MAX1795EUA	MAXIM	N/a	1860	avai	Low-Supply Current, Step-Up DC-DC Converters with True Shutdown
MAX1795EUA+T	MAXIN	N/a	1195	avai	Low-Supply Current, Step-Up DC-DC Converters with True Shutdown
MAX1796EUA+ \|MAX1796EUA	MAXIM	N/a	230	avai	Low-Supply Current, Step-Up DC-DC Converters with True Shutdown
MAX1796EUA+	N/A	N/a	2500	avai	Low-Supply Current, Step-Up DC-DC Converters with True Shutdown
MAX1797EUA+ \|MAX1797EUA	MAXIM	N/a	110	avai	Low-Supply Current, Step-Up DC-DC Converters with True Shutdown
MAX1797EUA+	N/A	N/a	2500	avai	Low-Supply Current, Step-Up DC-DC Converters with True Shutdown
MAX1797EUA+T \|MAX1797EUAT	MAX	N/a	2000	avai	Low-Supply Current, Step-Up DC-DC Converters with True Shutdown