GENERAL DEscriptION
The SGM3833A and SGM3833B are designed for powering AMOLED displays which require VAVDD, VELVDD and VELVSS. The devices integrate two boost converters, VO1 for VELVDD and VO3 for VAVDD, and an 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 (CTRL).
The SGM3833A and SGM3833B are both available in a Green TQFN-3×3-16L package. They operate over an ambient temperature range of -40℃ to +85℃
FEATURES
2.9V to 4.5V Input Voltage Range
Synchronous Boost Converter (ELVDD)
4.6V to 5.0V Output Voltage with 100mV Steps
4.6V Default Output Voltage
1.2% Accuracy
400mA Output Current Capability
Output Voltage Sensing Pin for Path Loss Compensation (FBS)
Synchronous Inverting Buck-Boost Converter (ELVSS)
-5.4V to -1.4V Output Voltage with 100mV Steps
-4.0V Default Output Voltage
1.5% Accuracy at -4.0V (±60mV)
400mA Output Current Capability
Synchronous Boost Converter (AVDD)
5.8V to 7.9V Output Voltage with 300mV Steps
7.6V Default Output Voltage
1.2% Accuracy
100mA Output Current Capability
VIN and VOUT Bi-Directional Isolation
Short Circuit Protection (SCP)
Overload Protection
Thermal Shutdown
VELVSS Start-Up Delay: 10ms
Short Circuit and OLP Detect Time: 1ms
Available in a Green TQFN-3×3-16L Package
APPLICATIONS
Smartphones & Tablets
Active Matrix OLED Displays