The LT ®1612 is an 800kHz, synchronous step-down DC/ DC converter that operates from an input voltage as low as 2V. Internal 0.45Ω switches deliver output currents up to 500mA, and the 800kHz switching frequency allows the use of small, low value ceramic input and output capacitors. Input voltage ranges from 5.5V down to 2V and output voltage can be set as low as the 620mV reference. The device features Burst Mode TM operation, keeping efficiency high at light loads. Burst Mode operation can be defeated by pulling the MODE pin high, enabling constant switching throughout the load range for low noise. No-load quiescent current is 160µA and shutdown current is less than 1µA. The device is available in 8-lead SO and MSOP packages.
The LT1612 is an 800 kHz synchronous step‑down DC/DC converter that operates from an input voltage as low as 2 V and delivers up to 500 mA of output current. It features a 620 mV reference, low quiescent current of 160 µA, and is available in 8‑lead MSOP or SO packages.
Typical applications include portable devices, lithium‑ion and alkaline step‑down converters. The document details electrical characteristics, pin functions, layout hints, and burst‑mode operation to help designers achieve high efficiency (up to 85 %) in compact designs.
| Input voltage range | 2 V to 5.5 V |
|---|---|
| Maximum output current | 500 mA |
| Switching frequency | 800 kHz (fixed) |
| Quiescent current | 160 µA |
| Reference voltage | 620 mV |
| Package options | 8‑lead MSOP or SO |
| Shutdown current | < 1 A |
| Maximum duty cycle | 85 %–90 % |
| Efficiency (typical) | up to 85 % |
The LT1612 can operate with an input voltage as low as 2 V.
Pull the MODE pin high (above 2 V) to keep the oscillator running continuously and disable Burst Mode.
The device has a low quiescent current of 160 µA.
The LT1612 is offered in an 8‑lead MSOP or an 8‑lead SO package.