Key facts
- Brand
- Analog Devices
- Model
- ADP1621
- Industry
- Industrial
- Documents
- 4
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- Last added
- 2022-11-29
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Analog Devices ADP1621 Constant-Frequency Current-Mode Step-Up DC-to-DC Controller Data Sheet
The ADP1621 is a fixed-frequency, pulse-width modulation (PWM), current-mode, step-up converter controller designed to drive an external n-channel MOSFET. It eliminates the need for a current-sense power resistor by measuring voltage drops across the MOSFET's on-resistance, supporting switch-node voltages up to 30 V in lossless mode. The device features a supply input range of 2.9 V to 5.5 V and can operate with power inputs as low as 1.0 V.
Read onlineAnalog Devices ADP1621 specifications
| Supply Voltage Range (VIN) | 2.9 V to 5.5 V |
|---|---|
| Power-Input Voltage Minimum | 1.0 V |
| Shutdown Current | < 10 µA |
| Operating Frequency Range | 100 kHz to 1.5 MHz |
| Switch-Node Voltage Limit (Lossless) | < 30 V |
| Thermal Shutdown Threshold | 150 °C |
Source: Analog Devices ADP1621 Constant-Frequency Current-Mode Step-Up DC-to-DC Controller Data Sheet
All Analog Devices ADP1621 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the supply voltage range for the ADP1621?
The IC supply voltage range is 2.9 V to 5.5 V.
From: Analog Devices ADP1621 Constant-Frequency Current-Mode Step-Up DC-to-DC Controller Data Sheet
Can the ADP1621 operate with a power input as low as 1V?
Yes, the power-input voltage can be as low as 1.0 V for fuel cell applications.
From: Analog Devices ADP1621 Constant-Frequency Current-Mode Step-Up DC-to-DC Controller Data Sheet
What is the switching frequency range of the ADP1621?
The switching frequency can be set between 100 kHz and 1.5 MHz using a single external resistor.
From: Analog Devices ADP1621 Constant Frequency Current Mode Boost DC/DC Controller Datasheet
Does the ADP1621 support lossless current sensing?
Yes, it provides lossless current detection when the switch node voltage is less than 30 V.
From: Analog Devices ADP1621 Constant Frequency Current Mode Boost DC/DC Controller Datasheet
What is the input voltage range of the ADP1621?
The device operates from 2.9 V up to 5.5 V, and can accept as low as 1 V for special low‑power applications.
How is the switching frequency set?
A resistor connected to the FREQ pin sets the free‑running frequency between 100 kHz and 1.5 MHz, and the frequency can be synchronized to an external clock via the SDSN pin.