Purchase MAX1640, In-stock MAX1640 From SeekIC.
Part Number: MAX1640
Description: The MAX1640/MAX1641 CMOS, adjustable-output, switch-mode current sources operate from a +5.5V to +26V ...
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MAX1640
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DataSheet
General Description
MAX1640 General Description
The MAX1640/MAX1641 CMOS, adjustable-output, switch-mode current sources operate from a +5.5V to +26V input, and are ideal for microprocessor-controlled battery chargers. Charging current, maximum output voltage, and pulse-trickle charge are programmed with external resistors. Programming the off-time modifies the switching frequency, suppressing undesirable harmonics in noise- sensitive circuits. The MAX1640's highside current sensing allows the load to connect directly to ground, eliminating ground-potential errors. The MAX1641 incorporates a low-side current sense.
The MAX1640/MAX1641 step-down pulse-width-modulation (PWM) controllers use an external P-channel MOSFET switch and an optional, external N-channel MOSFET synchronous rectifier for increased efficiency. An internal low-dropout linear regulator provides power for the internal reference and circuitry as well as the gate drive for the N-channel synchronous rectifier.
The MAX1640/MAX1641 are available in space-saving, 16-pin narrow QSOP packages.
MAX1640 Maximum Ratings
IN to GND...............................................................-0.3V to +28V
LDOH to IN...............................................................+0.3V to -6V
LDOL to GND ...........................................................-0.3V to +6V
PDRV to GND ............................... (VLDOH - 0.3V) to (VIN + 0.3V)
NDRV to GND..........................................-0.3V to (VLDOL + 0.3V)
TOFF, REF, SET, TERM, CC to GND .........-0.3V to (VLDOL + 0.3V)
D0, D1 to GND ........................................................-0.3V to +6V
CS+, CS- to GND ...................................................-0.3V to +28V
PGND to GND......................................................................±0.3V
Continuous Power Dissipation (TA = +70°C)
QSOP (derate 8.30mW/°C above +70°C) .................. 667mW
Operating Temperature Range
MAX164_EEE...................................................-40°C to +85°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10sec) ............................ +300°C
LDOH to IN...............................................................+0.3V to -6V
LDOL to GND ...........................................................-0.3V to +6V
PDRV to GND ............................... (VLDOH - 0.3V) to (VIN + 0.3V)
NDRV to GND..........................................-0.3V to (VLDOL + 0.3V)
TOFF, REF, SET, TERM, CC to GND .........-0.3V to (VLDOL + 0.3V)
D0, D1 to GND ........................................................-0.3V to +6V
CS+, CS- to GND ...................................................-0.3V to +28V
PGND to GND......................................................................±0.3V
Continuous Power Dissipation (TA = +70°C)
QSOP (derate 8.30mW/°C above +70°C) .................. 667mW
Operating Temperature Range
MAX164_EEE...................................................-40°C to +85°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10sec) ............................ +300°C
MAX1640 Features
95% Efficiency
+5.5V to +26V Input Supply Range
2V to 24V Adjustable-Output Voltage Range
100% Maximum Duty Cycle (Low Dropout)
Up to 500kHz PWM Operation
Optional Synchronous Rectifier
16-Pin QSOP Package
Current-Sense Accuracy: 2% (MAX1641)
5.3% (MAX1640)
+5.5V to +26V Input Supply Range
2V to 24V Adjustable-Output Voltage Range
100% Maximum Duty Cycle (Low Dropout)
Up to 500kHz PWM Operation
Optional Synchronous Rectifier
16-Pin QSOP Package
Current-Sense Accuracy: 2% (MAX1641)
5.3% (MAX1640)
MAX1640 Typical Application
Battery-Powered Equipment
Laptop, Notebook, and Palmtop Computers
Handy Terminals
Portable Consumer Products
Cordless Phones
Cellular Phones
PCS Phones
Backup Battery Charger
Laptop, Notebook, and Palmtop Computers
Handy Terminals
Portable Consumer Products
Cordless Phones
Cellular Phones
PCS Phones
Backup Battery Charger
MAX1640 Connection Diagram
MAX1640
PDF/DataSheet Download
- Datasheet: MAX1640
- File Size: 128845 KB
- Manufacturer: MAXIM [Maxim Integrated Products]
- Click here to Download
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