深圳市科瑞芯电子有限公司

台湾致新 G2156K11U TQFN4X4-32 代理商主推

General Description 
The G2156 device features four synchronous 5.5V 
input range high efficiency buck converters. The converters are designed to simplify its application while 
giving the designer the option to optimize their usage 
according to the target application. 
The converters can operate in 5V systems and have 
integrated power transistors. The output voltage can 
be set externally using a resistor divider to any value 
between 0.8V and close to the input supply. Each 
converter features enable pin that allows a delayed 
start-up for sequencing purposes. The current mode 
control allows a simple RC compensation. 
The switching frequency of the converters can operate 
1 MHz. 
The G2156 features a supervisor circuit that monitors 
each converter output. The PGOOD pin is asserted 
once sequencing is done, all PG signals are reported 
and a selectable end of reset time lapses. The polarity 
of the PGOOD signal is active high. 
The G2156 Buck1/3/4 also features a light load pulse 
skipping mode, PSM mode allows for a reduction on 
the input power supplied to the system when the host 
processor is in stand-by (low activity) mode. SKIP1 
PIN is setting Buck1 skipping mode.

Features 
Continuous Loading: 3A (Buck1), 1A (Buck2, 
3 and 4)
1MHz Switching Frequency 
0.8V ± 2% Voltage Reference Over Temperature 
External Enable/Sequencing and Soft Start Pins 
Adjustable Soft Start 
Power Good Output 
Cycle by Cycle Current Limit, Thermal and 
Overload protection. 
Thermally Enhanced 4mm × 4mm 32-pin QFN 

Applications 
Set Top Boxes 
Blue-ray DVD 

应用电路图：