MAX1640
Info: : PRODUCTION
searchIcon
cartIcon

MAX1640

Adjustable-Output, Switch-Mode Current Sources with Synchronous Rectifier

Show More showmore-icon

High-Accuracy Current Sources Remain Cool While Fast Charging

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $4.17
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)
Additional Details
show more Icon

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 high-side 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.

Applications

  • Backup Battery Charger
  • Battery-Powered Applications
  • Cell Phones
  • Cordless Phones
  • Handy Terminals
  • Laptop, Notebook, and Palmtop Computers
  • PCS Phones
  • Portable Consumer Products
Part Models 2
1ku List Price Starting From $4.17

close icon
Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX1640EEE+
  • HTML
  • HTML
MAX1640EEE+T
  • HTML
  • HTML

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Mar 13, 2023

- 2361N

WAFER FAB

MAX1640EEE+

PRODUCTION

MAX1640EEE+T

PRODUCTION

Jan 24, 2019

- 1746N

ASSEMBLY

MAX1640EEE+

PRODUCTION

MAX1640EEE+T

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Mar 13, 2023

- 2361N

arrow down

WAFER FAB

MAX1640EEE+

PRODUCTION

MAX1640EEE+T

PRODUCTION

Jan 24, 2019

- 1746N

arrow down

ASSEMBLY

MAX1640EEE+

PRODUCTION

MAX1640EEE+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Recently Viewed