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Overview
| Topology | Buck Converter |
| Input voltage | 2.25-5.5 V |
| Switching frequency | 1000-3000 kHz |
| Output 1 | 3.3 V / 1 A |
| Output 2 | 1 V / 1 A |
| Output 3 | 1.8 V / 1 A |
| Output 4 | 2.5 V / 1 A |
| Output 5 | 1.2 V / 1 A |
| Output 6 | 1.6 V / 1 A |
| Output 7 | 2 V / 4 A |
| Output 8 | 1.5 V / 1 A |
| Output 9 | 3 V / 1 A |
| Output 10 | 1.2 V / 3 A |
Description
The LTC®3374 is a high efficiency multioutput power supplyIC. The DC/DCs consist of eight synchronous buckconverters (1A each) all powered from independent 2.25Vto 5.5V input supplies.The DC/DCs may be used independently or in parallel toachieve higher currents of up to 4A per output with a sharedinductor. The common buck switching frequency may beprogrammed with an external resistor, synchronized to anexternal oscillator, or set to a default internal 2MHz clock.The operating mode for all DC/DCs may be programmedvia the MODE pin.To reduce input noise the buck converters are phased in90° steps. Precision enable pin thresholds provide reliablepower-up sequencing. The LTC3374 is available in acompact 38-lead 5mm × 7mm QFN package as well as a38-lead TSSOP package.
Features
8-Channel Independent Step-Down DC/DCsMaster-Slave Configurable for Up to 4A per OutputRail with a Single InductorIndependent VIN Supplies for Each DC/DC(2.25V to 5.5V)All DC/DCs Have 0.8V to VIN Output RangePrecision Enable Pin Thresholds for AutonomousSequencing1MHz to 3MHz Programmable/SynchronizableOscillator Frequency (2MHz Default)Die Temperature Monitor OutputThermally-Enhanced 38-Lead QFN (5mm × 7mm)and TSSOP Packages
Typical applications
- Industrial/Automotive/Communications
- General Purpose Multichannel Power Supplies
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(nH) | LR(nH) | IR(A) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | fres(MHz) | Material | IRP,40K(A) | RDC max.(mΩ) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCM SMT High Current Flat Wire Inductor, 250 nH, 250 nH | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCM SMT High Current Flat Wire Inductor | Inductance250 nH | Rated Inductance250 nH | Rated Current38 A | Saturation Current @ 10%54.4 A | Saturation Current @ 30%64.7 A | DC Resistance0.32 mΩ | Self Resonant Frequency33 MHz | MaterialMnZn | Performance Rated Current56 A | – | MountSMT | ||||
 | WE-LHMI SMT Power Inductor, 2200 nH, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LHMI SMT Power Inductor | Inductance2200 nH | – | – | Saturation Current @ 10%10 A | Saturation Current @ 30%19.1 A | – | Self Resonant Frequency32 MHz | – | Performance Rated Current7.7 A | DC Resistance20 mΩ | MountSMT |