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Overview
| Topology | Buck Converter |
| Input voltage | 4.5-60 V |
| Switching frequency | 1000-3000 kHz |
| Output 1 | 5 V / 2 A |
| Output 2 | 5 V / 4 A |
| Output 3 | 5 V / 1 A |
| IC revision | A |
Description
The LTC3372 is a highly flexible multioutput power supply IC. The device includes a high-performance, high voltage (HV) 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 also includes four low voltage (LV) synchronous buck regulators that can be programmed by the C1-C3 pins to share eight 1A integrated power stages in one of eight possible configurations. Each power stage is powered from independent inputs which may be connected to the HV buck’s VOUT or to other 2.25V to 5.5V supplies.The CT pin programs timing parameters of the watchdog timer and LV outputs’ Power-On Reset (RST). Precision enable thresholds facilitate reliable power-up sequencing.The LTC3372 is available in a 48-pin 7mm × 7mm QFN package.
Features
- HV Buck Controller: VIN = 4.5V to 60V, VOUT = 5V/3.3V
- LV Buck Regulators: VINA-H = 2.25V to 5.5V, VOUT1-4 ≥ 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 (IQ)
- 15µA HV Controller Only (5VOUT)
- 23μA HV Controller Only (3.3VOUT)
- 33μA HV Controller (3.3VOUT) Plus One LV Regulator
- 9μA Per Additional LV Regulator Channel
- 1MHz to 3MHz Operation (HV Runs at 1/6 Frequency)
- Programmable or Synchronizable to External Clock
- Programmable Watchdog and Power-On Reset Delay
- IC Die Temperature Monitor Output
- Thermally Enhanced 48-Pin 7mm × 7mm QFN Package
Typical applications
- General Purpose Multi-Channel Power Supplies
- Automotive and Industrial Always-On Systems
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,30%(A) | RDC typ.(mΩ) | fres(MHz) | VOP(V) | Mount | IR(A) | ISAT(A) | RDC max.(mΩ) | Material | Version | ISAT,10%(A) | RDC(mΩ) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCI SMT Flat Wire High Current Inductor, 1 µH, 14.8 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCI SMT Flat Wire High Current Inductor | Inductance1 µH | Performance Rated Current14.8 A | Saturation Current @ 30%11.5 A | – | Self Resonant Frequency158 MHz | – | MountSMT | – | – | DC Resistance5.225 mΩ | MaterialSuperflux | VersionSMT | Saturation Current @ 10%5.5 A | DC Resistance4.75 mΩ | ||||
 | WE-MAPI SMT Power Inductor, 2.2 µH, 6.2 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MAPI SMT Power Inductor | Inductance2.2 µH | Performance Rated Current6.2 A | Saturation Current @ 30%7.9 A | DC Resistance29 mΩ | Self Resonant Frequency34 MHz | Operating Voltage80 V | MountSMT | Rated Current4.7 A | Saturation Current6.2 A | DC Resistance35 mΩ | – | VersionSMT | Saturation Current @ 10%4.05 A | – | ||||
 | WE-SPC SMT Power Inductor, 4.7 µH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SPC SMT Power Inductor | Inductance4.7 µH | – | – | DC Resistance45 mΩ | Self Resonant Frequency44 MHz | – | MountSMT | Rated Current2.2 A | Saturation Current3.2 A | DC Resistance52 mΩ | – | VersionSMT | – | – |