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Overview
| Topology | Buck Converter |
| Input voltage | 2.25-5.5 V |
| Switching frequency | 1000-3000 kHz |
| Output 1 | 1.2 V / 6 A |
| Output 2 | 1.8 V / 6 A |
Description
The LTC®3312SA features dual monolithic synchronous 6A step-down converters in a 4mm × 3mm package for space saving applications with demanding performancerequirements. Using a constant frequency, peak current mode architecture at switching frequencies up to 3MHz, both bucks achieve high efficiency and fast transient response with small external components. The LTC3312SA can also be configured as a single output,2-phase 12A step-down converter.
Features
- Dual 6A Outputs
- Configurable as Single Output, 2-Phase 12A Buck
- High Efficiency: 12mΩ High-Side and 8mΩ Low-Side
- ±1% Maximum Total DC Output Error
- Wide Bandwidth, Fast Transient Response
- Internal Input Capacitors Reduce EMI
- VIN Range: 2.25V to 5.5V
- VOUT Range: 0.5V to VIN
- Programmable Frequency to 3MHz
- Low Ripple Burst Mode® Operation with Low IQ
- Shutdown Current: 1.4μA
- 35ns Minimum On-Time
- Internal Compensation
- Precision Enable, Power Good for Power Sequencing
- Tracking, Programmable Soft-Start, Temp Monitor Output
- Thermally Enhanced, 22-Lead 4mm × 3mm ×0.95mm LQFN package
- AEC-Q100 Qualified for Automotive
Typical applications
- Communications, Servers, Telecom Power Supplies, Optical Networking
- FPGA, ASIC, μP Core Supplies
- Industrial, Distributed DC Power Systems (POL)
- Automotive
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT1(A) | ISAT2(A) | RDC max.(mΩ) | fres(MHz) | IRP,40K(A) | ISAT,30%(A) | RDC typ.(mΩ) | VOP(V) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-PMCI Power Molded Chip Inductor, 0.25 µH, 9.05 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PMCI Power Molded Chip Inductor | Inductance0.25 µH | Rated Current9.05 A | Saturation Current 18.5 A | Saturation Current 215.65 A | DC Resistance31 mΩ | Self Resonant Frequency150 MHz | Performance Rated Current9.05 A | Saturation Current @ 30%15.65 A | DC Resistance26 mΩ | – | MountSMT | ||||
 | WE-MAPI SMT Power Inductor, 0.33 µH, 5.5 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MAPI SMT Power Inductor | Inductance0.33 µH | Rated Current5.5 A | – | – | DC Resistance17 mΩ | Self Resonant Frequency140 MHz | Performance Rated Current8.7 A | Saturation Current @ 30%10.5 A | DC Resistance14 mΩ | Operating Voltage80 V | MountSMT |