400mA Triple-Output AMOLED Display Power Supply, SGM3849 Replace RT4722.
SGM3849
SGM3849.pdf
SGM3849.pdfFEATURES
• 2.9V to 4.5V Input Voltage Range
• Synchronous Boost Converter (AVDD)
5.8V to 7.9V Output Voltage (Programmable)
6.1V Default Output Voltage
1.2% Accuracy
100mA Output Current Capability
VIN to VOUT and VOUT to VIN Isolation
• Synchronous Boost Converter (ELVDD)
4.6V to 5.0V Output Voltage (Programmable)
4.6V Default Output Voltage
1.2% Accuracy
400mA Output Current Capability
External Output Voltage Sensing Pin for Load
Drop Compensation
VIN to VOUT and VOUT to VIN Isolation
• Synchronous Inverting Buck-Boost Converter(ELVSS)
-5.4V to -1.4V Output Voltage (Programmable)
-2.5V Default Output Voltage
1.6% Accuracy at -2.5V (±40mV)
400mA Output Current Capability
VIN to VOUT and VOUT to VIN Isolation
• Short Circuit Protection
• Thermal Shutdown
• VELVSS Start-Up Delay: 10ms
• Short Circuit and OLP Detect Time: 1ms
• Available in Green TQFN-3×3-16L Package
PIN CONFIGUTION
CROSS
FEATURES
• Boost Converter to Supply Positive AVDD
Voltage from 5.8V to 7.9V
• Boost Converter to Supply AMOLED Positive
Voltage 4.6V
• Inverter Converter to Supply AMOLED Negative
Voltage from 1.4V to 5.4V
• Maximum Output Current up to 300mA for
AMOLED Positive & Negative Power Supply
• Maximum Output Current up to 55mA for AVDD
Output Voltage
• Typical Peak Efficiency : 90% (40mA to 150mA)
• PWM Mode @ 1.5MHz Switching Frequency
• High Output Voltage Accuracy
• Excellent Line and Load Transient
• Excellent Line and Load Regulation
• Programmable Negative and AVDD Voltage by
SWIRE Pin
• Fast Outputs Discharge Function
• Low Quiescent Current < 1A in Shutdown Mode
• Internal Soft-Start to limit Inrush Current
• Over-Temperature Protection (OTP)
• Over-Current Protection (OCP)
• Short Circuit Protection (SCP)
PIN CONFIGUTION
