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Overview
| Topology | Buck Converter |
| Input voltage | 2.25-5.5 V |
| Switching frequency | 10000 kHz |
| Output 1 | 5.5 V / 2 A |
Description
The LTC®3315B features dual 2A monolithic synchronous step-down converters operating from a 2.25V to 5.5V input supply in one package for space-constrained applications with demanding performance requirements. Using constant frequency, peak current mode control at switching frequencies up to 10MHz with a minimum ontime as low as 25ns, both bucks achieve high efficiency and fast transient response in a very small application footprint.
Features
- Dual Outputs Each with 2A Output Current
- High Efficiency: 19mΩ NMOS and 75mΩ PMOS
- Wide Bandwidth, Fast Transient Response
- Switching Frequency Synchronizable Up to 10MHz
- VIN Range: 2.25V to 5.5V
- VOUT Range: 0.5V to VIN
- VOUT Accuracy: }1%
- Low Ripple Burst ModeR Operation
- Peak Current Mode Control
- Minimum On-Time: 25ns
- Safely Tolerates Inductor Saturation in Overload
- Shutdown Current: 1.2μA
- Precision 400mV Enable Thresholds
- Internal Soft-Start and Compensation
- Power Good Output
- Low Profile, Thermally Enhanced 12-Lead 2mm × 2mm × 0.74mm LQFN Package
- AEC-Q100 Qualified for Automotive Applications
Typical applications
- Servers, Optical Networking, Communications
- Industrial
- Telecom Supplies, Distributed DC Power Systems (POL), FPGA, ASIC, μP Core Supplies
- 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) | ISAT(A) | RDC(mΩ) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-LQS SMT Power Inductor, 0.68 µH, 2.5 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LQS SMT Power Inductor | Inductance0.68 µH | Rated Current2.5 A | – | – | – | Self Resonant Frequency176 MHz | Saturation Current3.5 A | DC Resistance35 mΩ | ||||
 | WE-PMCI Power Molded Chip Inductor, 0.68 µH, 3.8 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PMCI Power Molded Chip Inductor | Inductance0.68 µH | Rated Current3.8 A | Saturation Current 11.8 A | Saturation Current 24 A | DC Resistance49 mΩ | Self Resonant Frequency130 MHz | Saturation Current3.4 A | – |