GENERAL DEscriptION

The SGM3837 is designed for powering AMOLED (Active Matrix Organic LED) displays which require VELVDD, VELVSS and VAVDD. The device integrates two Boost converters, VO1 for VELVDD and VO3 for VAVDD, and one inverting Buck-Boost converter VO2 for VELVSS. Output voltages of all the three converters can be programmed in digital steps through the digital interface control pins (ASWIRE & ESWIRE).

The SGM3837 is available in a Green WLCSP-2.0× 2.0-25B package.

FEATURES

• 2.9V to 5.0V Input Supply Voltage Range

• Synchronous Boost Converter (ELVDD)

  4.6V to 5.0V Output Voltage with 100mV Steps

  4.6V Default Output Voltage

  600mA Output Current Capability

• Synchronous Inverting Buck-Boost Converter (ELVSS)

  -6.6V to -1.0V Output Voltage with 100mV Steps

  -4.0V Default Output Voltage

  -600mA Output Current Capability (VELVSS = -1.0V to -5.4V)

• Synchronous Boost Converter (AVDD)

  7.1V to 7.8V Output Voltage (SET = Low)

  6.9V to 7.9V Output Voltage (SET = High)

  7.6V Default Output Voltage

  150mA Output Current Capability

• Selectable ASWIRE Setting via SET pin

• VIN and VOUT Bi-Directional Isolation

• Short Circuit Protection (SCP)

• Overload Protection

• Thermal Shutdown

• VELVSS Start-Up Delay: 10.4ms

• Short Circuit and OLP Detection Time: 0.08ms

• Available in a Green WLCSP-2.0×2.0-25B Package

APPLICATIONS

Smartphone & Tablet

Active Matrix OLED Display