| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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25 pcs
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25 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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| Clock Sync | |
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| Synchronous Rectifier | |
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The LM1770SMF from Texas Instruments is a low-voltage synchronous buck switching controller designed for efficient power management. It features a constant on-time control scheme, eliminating the need for external compensation components and simplifying design. This controller is optimized for a low input voltage range of 2.8V to 5.5V and can deliver an adjustable output voltage down to 0.8V, with a maximum output current of 4A.
The device incorporates a unique input feed-forward mechanism to maintain a constant switching frequency across the input voltage range, typically between 100kHz and 1MHz. It boasts a low quiescent current of 400µA, contributing to high light-load efficiency up to 98%. The LM1770SMF includes internal soft-start and short-circuit protection features for enhanced reliability.
Packaged in a compact SOT-23-5 surface-mount package, the LM1770SMF is suitable for applications where board space is limited. Its operating temperature range is -40°C to 125°C (TJ). This controller is ideal for various low-voltage power supply designs requiring a compact and efficient buck solution.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.75 | $0.75 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The input voltage range is 2.8V to 5.5V.
The output voltage range is 0.8V to 4.5V.
The maximum output current is 4A.
It is available in a SOT-23-5 surface-mount package, also known as SC-74A or SOT-753.
The operating junction temperature range is -40°C to 125°C.
The controller uses constant on-time (COT) control.
The typical quiescent current is 400µA.