LTM4700 Dual 50 A or Single 100 A µModule

By Linear Technology 84

LTM4700 Dual 50 A or Single 100 A µModule&#17

ADI's LTM4700 is a dual 50 A or single 100 A step-down µModule (power module) DC/DC regulator featuring remote configurability and telemetry-monitoring of power management parameters over PMBus, an open-standard I2C-based digital interface protocol. The LTM4700 is comprised of fast analog control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, inductors, and supporting components.

The LTM4700’s 2-wire serial interface allows outputs to be margined, tuned, and ramped up and down at programmable slew rates with sequencing delay times. Input and output currents and voltages, output power, temperatures, uptime, and peak values are readable. Custom configuration of the EEPROM contents is not required. Output voltages, switching frequency, and channel-phase angle assignments can be set by pin-strapping resistors at start-up. The LTpowerPlay® GUI and the DC1613 USB-to-PMBus converter and demo kits are available.

The LTM4700 is offered in a 15 mm × 22 mm × 7.87 mm BGA package available with SnPb or RoHS compliant terminal finish.

Typical Application

  • System optimization
  • Characterization and data mining in prototype
  • Production and field environments
  • Telecom
  • Datacom
  • Storage systems
  • Dual 50 A or single 100 A digitally adjustable outputs with digital interface for control, compensation, and monitoring
  • Wide input voltage: 4.5 V to 16 V
  • Output voltage range: 0.5 V to 1.8 V
  • 90% full-load efficiency from 12 VIN to 1 VOUT at 100 A
  • ±0.5% max. DC output error overtemperature
  • ±3% current readback accuracy (+25°C to +125°C)
  • Integrated input current-sense amp
  • 400 kHz PMBus-compliant I2C serial interface
  • Supports telemetry polling rates up to 125 Hz
  • Integrated 16-bit ∆Σ ADC
  • Constant frequency current-mode control
  • Parallel and current share multiple modules
  • 15 mm x 22 mm x 7.87 mm BGA package