PWM Buck Controller
Description
Data Sheet
Synchronous Current-Mode with Constant On-Time, PWM Buck Controller
ADP1872/ADP1873
FEATURES
Power input voltage as low as 2.
75 V to 20 V Bias supply voltage range: 2.
75 V to 5.
5 V Minimum output voltage: 0.
6 V 0.
6 V reference voltage with ±1.
0% accuracy Supports all N-channel MOSFET power stages Available in 300 kHz, 600 KHz, and 1.
0 MHz options No current-sense resistor required Power saving mode (PSM) for light loads (ADP1873 only) Resistor-programmable current-sense gain Thermal overload protection Short-circuit protection Precision enable input Integrated bootstrap diode for high-side drive 140 µA shutdown supply current Starts into a precharged load Small, 10-lead MSOP package
APPLICATIONS
Telecom and networking systems Mid to high end servers Set-top boxes DSP core power supplies
EFFICIENCY (%)
TYPICAL APPLICATIONS CIRCUIT
VIN = 2.
75V TO 20V
CC RC CC2
VOUT
RTOP RBOT
CVDD2 VDD = 2.
75V
TO 5.
5V
CVDD
VIN
ADP1872/ ADP1873
COMP/EN BST
FB DRVH
GND
SW
VDD
DRVL...
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