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Constant-Frequency, Current-Mode Step-Up DC/DC Controller
Analog Devices Inc.
Description
The ADP1621 is a fixed-frequency, pulse-width modulation (PWM), current-mode, step-up converter controller. It drives an external n-channel MOSFET to convert the input voltage to a higher output...
Features
92% efficiency (no sense resistor required) ±1.0% initial accuracy IC supply voltage range: 2.9 V to 5.5 V Power-input voltage as low as 1.0 V Capable of high supply input voltage (>5.5 V) with an external NPN or a resistor VIN UVLO and 35 mA shunt regulator External slope compensation with 1 resistor Programmable operating frequency (100 kHz to 1.5 MHz) with 1 resistor Lossless current sensing for switch-node voltage Resistor current sensing for switch-node voltage >30 V Synchronizable to external clock Current-mode operation for excellent line and load transient responses
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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