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Step-Down DC-to-DC Controller
Analog Devices Inc.
Description
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 ...
Features
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 ?A shutdown supply current
Related Datasheets
| Part Number | Description | Category |
| • ADP1621 | Constant-Frequency, Current-Mode Step-Up DC/DC Controller | ICs, Interface |
| • ADP1821 | Step-Down DC-to-DC Controller | ICs, Interface |
| • ADP1822 | PWM, Step-Down DC-to-DC Controller with Margining and Tracking | ICs, Interface |
| • ADP1823 | Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking | ICs, Interface |
| • ADP1828 | Synchronous Buck PWM, Step-Down, DC-to-DC Controller | ICs, Interface |
| • ADP1829 | Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking | ICs, Interface |
| • ADP1864 | Constant Frequency Current-Mode Step-Down DC-to-DC Controller in TSOT | ICs, Interface |
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