MAX1637
Info: : PRODUCTION
searchIcon
cartIcon

MAX1637

Miniature, Low-Voltage, Precision Step-Down Controller

Show More showmore-icon

Low-Voltage, Precision Step-Down Controller for Portable CPU Power

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $6.27
Features
  • ±2% DC Accuracy
  • 0.1% (typ) DC Load Regulation
  • Adjustable Switching Frequency to 350kHz
  • Idle Mode™ Pulse-Skipping Operation
  • 1.10V to 5.5V Adjustable Output Voltage
  • 3.15V Minimum IC Supply Voltage (at VCC pin)
  • Internal Digital Soft-Start
  • 1.1V ±2% Reference Output
  • 1µA Total Shutdown Current
  • Output Overvoltage Crowbar Protection
  • Output Undervoltage Shutdown (foldback)
  • Tiny 16-Pin QSOP Package
Additional Details
show more Icon

The MAX1637 synchronous, buck, switch-mode power-supply controller generates the CPU supply voltage in battery-powered systems. The MAX1637 is a stripped-down version of the MAX1636 in a smaller 16-pin QSOP package. The MAX1637 is intended to be powered separately from the battery by an external bias supply (typically the +5V system supply) in applications where the battery exceeds 5.5V. The MAX1637 achieves excellent DC and AC output voltage accuracy. This device can operate from a low input voltage (3.15V) and delivers the excellent load-transient response needed by upcoming generations of dynamic-clock CPUs.

Using synchronous rectification, the MAX1637 achieves up to 95% efficiency. Efficiency is greater than 80% over a 1000:1 load-current range, which extends battery life in system-suspend or standby mode. Excellent dynamic response corrects output load transients caused by the latest dynamic-clock CPUs within five 300kHz clock cycles. Powerful 1A on-board gate drivers ensure fast external N-channel MOSFET switching.

The MAX1637 features a logic-controlled and synchronizable, fixed-frequency, pulse-width-modulation (PWM) operating mode. This reduces noise and RF interference in sensitive mobile-communications and pen-entry applications. Asserting the SKIP-bar pin enables fixed-frequency mode, for lowest noise under all load conditions. For a stand-alone device that includes a +5V VL linear regulator and low-dropout capabilities, refer to the MAX1636 data sheet.

Applications

  • Handy-Terminals, PDAs
  • Notebook Computers
  • Subnotebook Computers
Part Models 2
1ku List Price Starting From $6.27

close icon
Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX1637EEE+
  • HTML
  • HTML
MAX1637EEE+T
  • HTML
  • HTML

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Apr 7, 2023

- 2361C

WAFER FAB

MAX1637EEE+

PRODUCTION

MAX1637EEE+T

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Apr 7, 2023

- 2361C

arrow down

WAFER FAB

MAX1637EEE+

PRODUCTION

MAX1637EEE+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Recently Viewed