Step-Down DC-to-DC Controller
Step-Down DC-to-DC Controller
ADP1821
FEATURES GENERAL DESCRIPTION Wide power-input voltage range: 1 V to 24 V
Chip supply voltage range: 3.7 V to 5.5 V
Wide output voltage range: 0.6 V to 85% of input voltage
1% accuracy, 0.6 V reference voltage
All N-channel MOSFET design for low cost
Fixed-frequency operation 300 kHz, 600 kHz, or
synchronized operation up to 1.2 MHz
No current sense resistor required
Power-good output
Programmable soft start with reverse current protection
Soft start, thermal overload, current-limit protection
Undervoltage lockout
10 μA shutdown supply current
Small, 16-lead QSOP The ADP1821 is a versatile and inexpensive, synchronous,
pulse-width-modulated (PWM), voltage-mode, step-down
controller. It drives an all N-channel power stage to regulate an
output voltage as low as 0.6 V. The ADP1821 can be configured
to provide output voltages from 0.6 V to 85% of the input
voltage and is sized to handle large MOSFETs for point-of-load
regulators.
The ADP1821 is well suited for a wide range of high power …
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