LTC1147-3.3 and LTC1147-5/LTC1147L are high-efficiency step-down switching regulator controllers with features such as wide input voltage range, high efficiency, low standby current, and short-circuit protection.
This manual describes the LTC1147‑3.3, LTC1147‑5 and LTC1147L step‑down switching regulator controllers. It includes features, absolute maximum ratings, electrical characteristics, typical performance graphs, pin descriptions, and detailed operation principles such as burst and continuous modes.
Application information covers component selection, inductor and capacitor sizing, MOSFET choice, and typical circuit examples. Package options and mechanical dimensions are also provided for both PDIP and plastic small‑outline packages.
| Input Supply Voltage (Pin 1) | 16 V to –0.3 V |
|---|---|
| Continuous Output Current (Pin 8) | 50 mA |
| Package Type | 8‑Lead PDIP (Narrow 0.300) |
The LTC1147 series can achieve very high efficiency, over 95% possible.
The device is offered in an 8‑lead PDIP (narrow 0.300) and an 8‑lead plastic small‑outline package.