GENERAL DEscriptION

The SGM3838 is designed for powering AMOLED displays which requires VELVDD, VELVSS and VAVDD. The device integrates two boost converters, VO1 for VELVDD and VO3 for VAVDD, and a dual-phase 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 pin (SWIRE).

The SGM3838 is available in a Green WLCSP-2.5×2.5-36B package.

FEATURES

• Synchronous Inverting Buck-Boost Converter (ELVSS)

  -6.0V to -0.8V Output Voltage with 100mV Steps

  -3.0V Default Output Voltage

  1% Accuracy at -3V

  700mA Output Current Capability

• Synchronous Boost Converter (AVDD)

  5.5V to 7.9V Output Voltage with 100mV Steps

  7.3V Default Output Voltage

  0.9% Accuracy at 7.3V

  150mA Output Current Capability

• VIN and VOUT Bi-Directional Isolation

• Short Circuit Protection (SCP)

• Overload Protection

• Thermal Shutdown

• VELVSS Start-Up Delay: 5.6ms

• Short Circuit and OLP Detection Time: 0.71ms

• Available in a Green WLCSP-2.5×2.5-36B Package

APPLICATIONS

Smartphones & Tablets

Active Matrix OLED Displays