Analog Devices Inc. LTC3372 Buck Controller Plus Buck Regulators ICs

Analog Devices LTC3372 Buck Controller Plus Buck Regulators ICs are highly flexible multioutput power supply ICs. These devices include a high-performance, high-voltage step-down DC/DC switching regulator controller that drives an all N-channel synchronous power FET stage from a 4.5V to 60V input. The LTC3372 ICs also include four low-voltage synchronous buck regulators that can be programmed by the C1-C3 pins to share eight 1A integrated power stages. The CT pin programs timing parameters of the watchdog timer and LV outputs’ Power-On Reset (RST). Reliable power-up sequencing is facilitated by precision enable thresholds. The LTC3372 ICs are primarily targeted at automotive applications that require multiple voltage rails.

Features

Programmable or synchronizable to external clock
Programmable watchdog and power-on reset delay
8 flexible configurations

IC die temperature monitor output
Thermally enhanced 48-pin 7mm × 7mm QFN package
Extends battery run-time

Specifications

HV Buck controller:
- 4.5V to 60V V_IN
- 5V/3.3V V_OUT
LV Buck regulators:
- 2.25V to 5.5V I_NA-H
- V_OUT1-4 ≥ 0.8V
8×1A LV buck integrated power stages, configurable as 2, 3, or 4 output channels
8 Unique output configurations (1A to 4A per channel)

Low total no-load input supply current (I_Q):
- 15µA HV controller only (5V_OUT)
- 23μA HV controller only (3.3V_OUT)
- 33μA HV controller (3.3V_OUT) plus one LV regulator
- 9μA Per additional LV regulator channel
1MHz to 3MHz operation (HV runs at 1/6 frequency)