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Overview
| Topology | Buck Converter |
| Input voltage | 3.3 V |
| Switching frequency | 3000 kHz |
| Output 1 | 0.8 V / 2 A |
| Output 2 | 1.2 V / 2 A |
Description
The LTC®3315A features dual 2A monolithic synchronousstep-down converters operating from a 2.25V to5.5V input supply in one package for space-constrainedapplications with demanding performance requirements.Using constant frequency, peak current mode control atswitching frequencies up to 3MHz with a minimum ontimeas low as 25ns, both bucks achieve high efficiencyand fast transient response in a very small applicationfootprint.
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 3MHz
- VIN Range: 2.25V to 5.5V
- VOUT Range: 0.5V to VIN
- VOUT Accuracy: ±1%
- Low Ripple Burst Mode® 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
Typical applications
- Distributed DC Power Systems (POL)
- Industrial/Automotive/Communications
- FPGA, ASIC, μP Core Supplies
- Servers, Telecom Supplies, Optical Networking
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-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 | ||||
| WE-MAPI SMT Power Inductor, 0.47 µH, 4.8 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MAPI SMT Power Inductor | Inductance0.47 µH | Rated Current4.8 A | – | – | DC Resistance22 mΩ | Self Resonant Frequency99 MHz | Performance Rated Current7.55 A | Saturation Current @ 30%9.8 A | DC Resistance18 mΩ | Operating Voltage80 V | MountSMT | ||||
 | WE-PMCI Power Molded Chip Inductor, 0.47 µH, 7.1 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PMCI Power Molded Chip Inductor | Inductance0.47 µH | Rated Current7.1 A | Saturation Current 15.15 A | Saturation Current 29.95 A | DC Resistance22 mΩ | Self Resonant Frequency90 MHz | Performance Rated Current7.1 A | Saturation Current @ 30%9.95 A | DC Resistance18 mΩ | – | MountSMT |