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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:
G2156K11U
GMT
TQFN4X4-32
22+
台湾