MAX1675EUA+T ,High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC ConvertersELECTRICAL CHARACTERISTICS (continued)(V = 2V, FB = OUT (V = 3.3V), R = ˙∞, T = 0°C to +85°C, unles ..
MAX1675EUA-T ,High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC ConvertersEVALUATION KIT AVAILABLEMAX1674/MAX1675/MAX1676 High-Efficiency, Low-Supply-Current, Compact, Step- ..
MAX1676EUB ,High-Efficiency / Low-Supply-Current / Compact / Step-Up DC-DC Convertersfeatures an adjustable cur-rent limit and circuitry to reduce inductor ringing._______________Order ..
MAX1676EUB ,High-Efficiency / Low-Supply-Current / Compact / Step-Up DC-DC ConvertersApplicationsMAX1674EUA -40°C to +85°C 8 µMAXPagersMAX1675EUA -40°C to +85°C 8 µMAXWireless PhonesMA ..
MAX1676EUB ,High-Efficiency / Low-Supply-Current / Compact / Step-Up DC-DC ConvertersApplicationsMAX1674EUA -40°C to +85°C 8 µMAXPagersMAX1675EUA -40°C to +85°C 8 µMAXWireless PhonesMA ..
MAX1676EUB+ ,High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC ConvertersFeaturesThe MAX1674/MAX1675/MAX1676 compact, high-effi-♦ 94% Efficient at 200mA Output Currentcienc ..
MAX4429ESA+ ,High-Speed, 6A MOSFET Driver (Noninverting)Features
. TTL/CMOS Compatible (IN f 10pA)
. 4.5V to 18V Supply Range (MAX4420/MAX4429)
O 1.59 ..
MAX4429MJA/883B ,High-Speed, 6A MOSFET Driver (Noninverting)Applications
Switching Power Supplies
DC-DC Converters
Motor Controllers
Pin-Diode Drivers
..
MAX4436ESA+ ,Single-Supply, 150MHz, 16-Bit Accurate, Ultra-Low Distortion Op Amps
MAX4444ESE+T ,Ultra-High-Speed, Low-Distortion, Differential-to-Single-Ended Line Receivers with Enable
MAX4447ESE ,6500V/s / Wideband / High-Output-Current / Single- Ended-to-Differential Line Drivers with Enable
MAX4447ESE+ ,6500V/µs, Wideband, High-Output-Current, Single-Ended-to-Differential Line Drivers with Enable
MAX1674EUA+-MAX1674EUA+T-MAX1675EUA+-MAX1675EUA+T-MAX1675EUA-T-MAX1676EUB+-MAX1676EUB+T-MAX1676EUB-T
High-Efficiency, Low-Supply-Current, Compact, Step-Up DC-DC Converters
AVAILABLE
EVALUATION KIT AVAILABLE
General DescriptionThe MAX1674/MAX1675/MAX1676 compact, high-effi-
ciency, step-up DC-DC converters fit in small µMAX
packages. They feature a built-in synchronous rectifier,
which improves efficiency and reduces size and cost
by eliminating the need for an external Schottky diode.
Quiescent supply current is only 16µA.
The input voltage ranges from 0.7V to VOUT, where
VOUTcan be set from 2V to 5.5V. Start-up is guaran-
teed from 1.1V inputs. The MAX1674/MAX1675/
MAX1676 have a preset, pin-selectable output for 5V or
3.3V. The outputs can also be adjusted to other volt-
ages using two external resistors.
All three devices have a 0.3ΩN-channel MOSFET
power switch. The MAX1674 has a 1A current limit. The
MAX1675 has a 0.5A current limit, which permits the
use of a smaller inductor. The MAX1676 comes in a
10-pin µMAX package and features an adjustable cur-
rent limit and circuitry to reduce inductor ringing.
________________________ApplicationsPagers
Wireless Phones
Medical Devices
Hand-Held Computers
PDAs
RF Tags
1 to 3-Cell Hand-Held Devices
____________________________Features94% Efficient at 200mA Output Current16µA Quiescent Supply CurrentInternal Synchronous Rectifier (no external diode)0.1µA Logic-Controlled ShutdownLBI/LBO Low-Battery DetectorSelectable Current Limit for Reduced RippleLow-Noise, Anti-Ringing Feature (MAX1676)8-Pin and 10-Pin µMAX PackagesPreassembled Evaluation Kit (MAX1676EVKIT)
High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC ConvertersGNDLBO
SHDNREF
OUTLBI
MAX1674
MAX1675
μMAX
TOP VIEW
OUT
GND
BATTCLSEL
LBO
LBI
MAX1676
μMAX
SHDNREF
MAX1674
MAX1675
INPUT
0.7V TO VOUT
SHDNLX
LBO
OUT
LBI
0.1μF
LOW-BATTERY
DETECT OUT
OFF
REFGNDFB
OUTPUT
3.3V, 5V, OR
ADJ (2V TO 5.5V)
UP TO 300mA
LOW-BATTERY
DETECT IN
PART
MAX1674EUA-40°C to +85°C
TEMP. RANGEPIN-PACKAGE8 µMAX
_______________Ordering Information
MAX1675EUA-40°C to +85°C8 µMAX
MAX1676EUB-40°C to +85°C10 µMAX
Typical Operating Circuit
Pin ConfigurationsMAX1674/MAX1675/MAX1676
High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC Converters
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VBATT= 2V, FB = OUT (VOUT= 3.3V), RL= ˙∞, TA
= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
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.
Supply Voltage (OUT to GND)..............................-0.3V to +6.0V
Switch Voltage (LX to GND).....................-0.3V to (VOUT+ 0.3V)
Battery Voltage (BATT to GND).............................-0.3V to +6.0V
SHDN, LBOto GND..............................................-0.3V to +6.0V
LBI, REF, FB, CLSEL to GND...................-0.3V to (VOUT+ 0.3V)
Switch Current (LX)...............................................-1.5A to +1.5A
Output Current (OUT)...........................................-1.5A to +1.5A
Continuous Power Dissipation (TA= +70°C)
8-Pin µMAX (derate 4.1mW/°C above +70°C) .............330mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mWOperating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +165°C
Lead Temperature (soldering, 10s).................................+300°C= +25°C, RL= 3kΩ(Note 1)
VLX= 0, 5.5V; VOUT= 5.5V= +25°C
MAX1675, MAX1676 (CLSEL = GND)
MAX1674, MAX1676 (CLSEL = OUT)
ILX= 100mA
FB = OUT
(VOUT= 3.3V)
VOUT= 2V to 5.5V
IREF= 0 to 100µA130MAX1675,
MAX1676 (CLSEL = GND)
FB = OUT
FB = GND
IREF =0
CONDITIONS0.051ILEAKLX Leakage Current0.40.50.65ILIM0.8011.20LX Switch Current
Limit (NFET)0.30.6RDS(ON)Internal NFET, PFET
On-Resistance1.2741.301.326FB, LBI Input Threshold
mV/V0.082.5VREF_LINEReference Voltage Line
Regulation315VREF_LOADReference Voltage Load
Regulation
mV/°C0.024TEMPCOReference Voltage Tempco1.2741.301.326VREFReference Voltage0.91.1Start-Up Voltage1.15.5VIN0.7Minimum Input Voltage
Operating Voltage
FB = GND
(VOUT= 5V)
MAX1675,
MAX1676 (CLSEL = GND)
IOUT
MAX1674,
MAX1676 (CLSEL = OUT)
Steady-State Output Current
(Note 2)
mV/°C-2Start-Up Voltage Tempco3.173.303.43VOUTOutput Voltage 4.8055.20
MAX1674,
MAX1676 (CLSEL = OUT)25.5Output Voltage Range
UNITSMINTYPMAXSYMBOLPARAMETERMAX1674/MAX1675/MAX1676
High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC Converters
ELECTRICAL CHARACTERISTICS(VBATT= 2V, FB = OUT, RL= ∞, TA
= -40°C to +85°C, unless otherwise noted.) (Note 4)VOUT= 2V, ILOAD= 1mA
VOUT= 3.3V, ILOAD= 200mA
SHDN= GND
CONDITIONS85Efficiency900.11Shutdown Current into OUT
UNITSMINTYPMAXSYMBOLPARAMETERMAX1676, VBATT= 2VLBO= 5.5V, VLBI= 5.5V
VLBI= 0, ISINK= 1mASHDN= 0 or VOUT
VFB= 1V, VOUT= 3.3V
MAX1676, CLSEL = OUT
VLBI= 1.4V
VFB= 1.4V
VFB= 1V, VOUT= 3.3V
0.8VOUTVIH
0.2VOUTVILCLSELInput Voltage0.8VOUTVIH
0.2VOUTVILSHDNInput Voltage88150Damping Switch Resistance0.071ILBOLBOOff Leakage Current 0.20.4LBOLow Output Voltage0.0750ISHDNSHDNInput Current1.43ICLSELCLSEL Input Current150ILBILBI Input Current0.0350IFBFB Input Current0.811.2tOFFLX Switch Off-Time347tONLX Switch On-Time
ELECTRICAL CHARACTERISTICS (continued)(VBATT= 2V, FB = OUT (VOUT= 3.3V), RL= ˙∞, TA
= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
FB = GND
FB = OUT
VFB= 1V, VOUT= 3.3V
VFB= 1V, VOUT= 3.3V
SHDN= GND
VFB= 1.4V, VOUT= 3.3V
IREF= 0
MAX1675, MAX1676 (CLSEL = GND)
MAX1674, MAX1676 (CLSEL = OUT)
CONDITIONS0.360.69A0.751.25ILIMLX Switch Current
Limit (NFET)2.205.5Output Voltage Range4.755.25
3.133.47VOUTOutput Voltage0.751.25tOFFLX Switch Off-Time2.77.0tONLX Switch On-Time1Shutdown Current into OUT40Operating Current into OUT
(Note 3)1.26751.3325VREFReference Voltage1.26751.3325FB, LBI Thresholds0.6RDS(ON)Internal NFET, PFET
On-Resistance
UNITSMINMAXSYMBOLPARAMETERVFB= 1.4V, VOUT= 3.3VµA1635Operating Current into OUT
(Note 3)
MAX1674/MAX1675/MAX1676
High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC Converters
Typical Operating Characteristics(L = 22µH, CIN= 47µF, COUT= 47µF0.1µF, CREF= 0.1µF, TA= +25°C, unless otherwise noted.)
VLBO= 5.5V, VLBI= 5.5V
VSHDN= 0 or VOUT
MAX1676, CLSEL = OUT
CONDITIONS1ILBOLBOOff Leakage Current 75ISHDNSHDNInput Current3ICLSELCLSEL Input Current
UNITSMINMAXSYMBOLPARAMETER
ELECTRICAL CHARACTERISTICS (continued)(VBATT= 2V, FB = OUT, RL= ∞, TA
= -40°C to +85°C, unless otherwise noted.) (Note 4)
Note 1:Start-up voltage operation is guaranteed with the addition of a Schottky MBR0520 external diode between the input and
output.
Note 2:Steady-state output current indicates that the device maintains output voltage regulation under load. See Figures 5 and 6.
Note 3:Device is bootstrapped (power to the IC comes from OUT). This correlates directly with the actual battery supply.
Note 4:Specifications to -40°C are guaranteed by design, not production tested.
EFFICIENCY vs. LOAD CURRENT
MAX1674 toc01
LOAD CURRENT (mA)
EFFICIENCY (%)40
VIN = 1.2V
VOUT = 5V
ILIMIT = 500mA
VIN = 2.4V
VIN = 3.6V
EFFICIENCY vs. LOAD CURRENT
MAX1674 toc02
LOAD CURRENT (mA)
EFFICIENCY (%)40
VIN = 1.2V
VOUT = 5V
ILIMIT = 1A
VIN = 2.4V
VIN = 3.6V
EFFICIENCY vs. LOAD CURRENT
MAX1674 toc03
LOAD CURRENT (mA)
EFFICIENCY (%)40
VIN = 1.2V
VOUT = 3.3V
ILIMIT = 500mA
VIN = 2.4V
EFFICIENCY vs. LOAD CURRENT
MAX1674 toc04
LOAD CURRENT (mA)
EFFICIENCY (%)40
VIN = 1.2V
VOUT = 3.3V
ILIMIT = 1A
VIN = 2.4V
REFERENCE OUTPUT VOLTAGE
vs. TEMPERATURE
MAX1674 toc05
TEMPERATURE (°C)
REFERENCE OUTPUT VOLTAGE (V)
IREF = 0
IREF = 100μA
MAX1674/MAX1675/MAX1676
High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC ConvertersNO-LOAD BATTERY CURRENT
vs. INPUT BATTERY VOLTAGE
MAX1674toc07
INPUT BATTERY VOLTAGE (V)
INPUT BATTERY CURRENT (
ILIMIT = 1A, 5.0V
ILIMIT = 0.5A, 5.0V
ILIMIT = 0.5A, 3.3V
ILIMIT = 1A, 3.3V
START-UP VOLTAGE
vs. LOAD CURRENT
MAX1674toc08
LOAD CURRENT (mA)
START-UP VOLTAGE (V)
WITHOUT DIODE
WITH 1N5817
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
MAX167toc09
SUPPLY VOLTAGE (V)
SHUTDOWN CURRENT (
SHUTDOWN THRESHOLD
vs. SUPPLY VOLTAGE
MAX1674TOC10
SUPPLY VOLTAGE (V)
SHUTDOWN THRESHOLD (V)
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE (VOUT = 5V)
MAX1674toc11
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)
1A CURRENT LIMIT
0.5A CURRENT LIMIT
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE (VOUT = 3.3V)
MAX1674toc12
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)0.5A CURRENT LIMIT
1A CURRENT LIMIT
Typical Operating Characteristics (continued)(L = 22µH, CIN= 47µF, COUT= 47µF0.1µF, CREF= 0.1µF, TA= +25°C, unless otherwise noted.)
1μs/div
HEAVY-LOAD SWITCHING WAVEFORMSMAX1674 TOC13
VLX
5V/div
ILX
0.5A/div
VOUT
AC COUPLED
100mV/divVIN = 2.4V
VOUT = 5.0V
LX CURRENT LIMIT
vs. OUTPUT VOLTAGE
MAX1674toc14
OUTPUT VOLTAGE (V)
ILIM
(A)
MAX1674, MAX1676 (CLSEL = OUT)
MAX1675, MAX1676 (CLSEL = GND)
SWITCH RESISTANCE vs. TEMPERATURE
MAX1674toc13.5
TEMPERATURE (°C)
RESISTANCE (
P-CHANNEL
N-CHANNEL
MAX1674/MAX1675/MAX1676
10μs/div
LINE-TRANSIENT RESPONSEMAX1674 TOC15
VIN
2V TO 3V
1V/div
VOUT
AC COUPLED
100mV/divILOAD
100mA
5μs/div
LOAD-TRANSIENT RESPONSEMAX1674 TOC16
IOUT
200mA/div
VOUT
50mV/div
COUPLED
VIN = 2.4V
VOUT = 3.3V
500μs/div
EXITING SHUTDOWNMAX1674 TOC17
VSHDN
2V/div
VOUT
2V/div
High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC Converters
Typical Operating Characteristics (continued)(L = 22µH, CIN= 47µF, COUT= 47µF0.1µF, CREF= 0.1µF, TA= +25°C, unless otherwise noted.)
Pin Description
PIN
NAMEFUNCTIONMAX1674
MAX1675MAX16761FB
Dual-Mode™ Feedback Input. Connect to GND for +5.0V output.
Connect to OUT for +3.3V output. Use a resistor network to set the
output voltage from +2.0V to +5.5V.2LBILow-Battery Comparator Input. Internally set to trip at +1.30V. 3LBO
Open-Drain Low-Battery Comparator Output. Connect LBOto OUT
through a 100kΩresistor. Output is low when VLBI is<1.3V. LBOis
high impedance during shutdown.4CLSELCurrent-Limit Select Input. CLSEL = OUT sets the current limit to 1A.
CLSEL = GND sets the current limit to 0.5A.5REF1.3V Reference Voltage. Bypass with a 0.1µF capacitor.6SHDN
Shutdown Input. Drive high (>80% of VOUT) for operating mode.
Drive low (<20% of VOUT) for shutdown mode. Connect to OUT for
normal operation.7BATTBattery Input and Damping Switch Connection. If damping switch is
unused, leave BATT unconnected.8GNDGround9LXN-Channel and P-Channel Power MOSFET Drain10OUTPower Output. OUT provides bootstrap power to the IC.
Dual-Mode is a trademark of Maxim Integrated Products.
MAX1674/MAX1675/MAX1676
