| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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15 pcs
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15 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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| Synchronous Rectifier | |
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| Voltage |
The LTC3643EUDD#TRPBF by Analog Devices is a versatile bidirectional synchronous DC-DC converter. It functions as both a step-up charger and a step-down regulator, making it ideal for power backup applications.
This device efficiently charges a capacitor array up to 40V from an input supply ranging from 3V to 17V. When the input supply drops below a programmable power-fail threshold, the LTC3643 reverses operation, acting as a synchronous step-down regulator to power the system from the backup capacitor. It supports a maximum CAP charge current of 2A and operates at a fast 1MHz switching frequency, allowing for the use of small external components.
The LTC3643EUDD#TRPBF features integrated N-channel MOSFETs for efficient power conversion and output/CAP disconnect. It includes input current limiting during charging and provides indicator outputs for charge status and input power fail. The device is housed in a compact 24-lead 3mm x 5mm QFN package, suitable for space-constrained designs.
Key electrical specifications include a wide input voltage range of 3V to 17V, a 2A maximum charge current, and a 1MHz switching frequency. The output voltage is adjustable, and the device supports both buck and boost topologies with synchronous rectification. The operating temperature range is -40°C to 125°C (TJ).
| Qty | Low | High |
|---|---|---|
| 1+ | $1.08 | $1.08 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
3V to 17V.
2A.
1MHz.
-40°C to 125°C junction temperature.
24-WFQFN Exposed Pad (24-QFN 3x5mm).
Buck and Boost.
Yes, the output voltage is adjustable.