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Analog Devices LTC7151S | Demoboard DC2615A
LTC7151S High Efficiency 15A Silent Switcher Buck Regulator
Overview
| Topology | Buck Converter |
| Input voltage | 3.1-20 V |
| Output 1 | 1.2 V / 15 A |
Description
Demonstration circuit 2615A features the LTC7151S in a high efficiency 1.2V/15A step-down regulator with an input voltage range of 3.1V to 20V and a 1MHz switching frequency. The Silent Switcher®2 technology reduces the switching noise while the internal MOSFETs of the LTC7151S provide high efficiency over a wide input voltage range. No current sense resistor is required.The LTC7151S employs a controlled on-time, valley current mode architecture. This architecture allows for a short minimum on-time which is ideal for high stepdown ratios. In addition, the architecture provides a fast load step response by allowing the switch node pulses to compress after the load steps up – see Figure 6.The LTC7151S data sheet provides a complete description of the IC operation and application information. The data sheet must be read in conjunction with the quick start guide.
Features
- Silent Switcher®2 Architecture for Low EMI
- VIN Range: 3.1V to 20V
- VOUT Range: 0.5V to 5.5V
- Differential VOUT Remote Sense
- Adjustable Frequency: 400kHz to 3MHz
- Poly Phase® Operation: Up to 12 Phases
- Output Tracking and Soft-Start
- Reference Accuracy: ±1% Over temperature
- Current Mode Operation for Excellent Line and Load Transient Response
- Accurate 1.2V Run Pin Threshold
- Supports Forced Continuous/Discontinuous Modes
- 28-Lead Thermally Enhanced 4mm × 5mm × 0.74mm LQFN Package
Typical applications
- Automotive and Industrial Power Supplies, Server Power Applications, Point-of-Load Supply for ASIC, FPGA, DSP, µP, etc.
- Distributed Power Systems
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | f(mm) | L(nH) | LR(nH) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | fres(MHz) | Material | Pins | Type | Mount | L(mm) | H(mm) | IR(A) | Working Voltage(V (AC)) | Operating Temperature | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCM SMT High Current Flat Wire Inductor, –, 200 nH | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCM SMT High Current Flat Wire Inductor | – | Inductance200 nH | Rated Inductance198 nH | Saturation Current @ 10%44 A | Saturation Current @ 30%50.4 A | DC Resistance0.37 mΩ | Self Resonant Frequency45 MHz | MaterialMnZn | Pins2 | – | MountSMT | Length10.1 mm | Height6.8 mm | Rated Current25 A | – | Operating Temperature -40 °C up to +125 °C | ||||
 | WR-PHD Pin Header, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | – | – | – | – | – | – | – | – | Pins4 | TypeStraight | MountTHT | Length4 mm | – | Rated Current2 A | Working Voltage200 V (AC) | Operating Temperature -40 °C up to +105 °C | |||
 | WA-SNSR Self-Retaining Spacer, 4.8 mm, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWA-SNSR Self-Retaining Spacer | Drilling in Panel4.8 mm | – | – | – | – | – | – | MaterialPA66 | – | – | – | Length12.7 mm | – | – | – | Operating Temperature -30 °C up to +85 °C | |||
 | WR-PHD Jumper, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Jumper | – | – | – | – | – | – | – | – | Pins2 | – | – | – | – | Rated Current3 A | Working Voltage200 V (AC) | Operating Temperature -25 °C up to +105 °C | |||
 | WR-PHD Pin Header, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | – | – | – | – | – | – | – | – | Pins3 | TypeStraight | MountTHT | Length6 mm | – | Rated Current2 A | Working Voltage200 V (AC) | Operating Temperature -40 °C up to +105 °C |