LTC3613
RECOMMENDED FOR NEW DESIGNS24V, 15A Monolithic Step Down Regulator with Differential Output Sensing
- Part Models
- 4
- 1ku List Price
- Starting From $14.61
Overview
- Wide VIN Range: 4.5V to 24V; VOUT Range: 0.6V to 5.5V at up to 15A
- 0.67% Output Voltage Accuracy
- Controlled On-Time Valley Current Mode Architecture, Excellent Current Sharing Capability
- Frequency Programmable from 200kHz to 1MHz and Synchronizable to External Clock
- RSENSE or Inductor DCR Current Sensing With Accurate Current Limit
- Fast Transient Response
- Differential Output Voltage Sensing Allowing 500mV Common Mode Remote Ground
- tON(MIN) = 65ns; tOFF(MIN) = 105ns
- Overvoltage Protection and Current Limit Foldback
- Power Good Output Voltage Monitor
- Voltage Tracking Start-Up
- External VCC Input for Bypassing Internal LDO
- Micropower Shutdown: IQ = 15μA
- 7mm × 9mm 56-pin QFN Package
The LTC3613 is a monolithic synchronous step-down switching regulator capable of regulating outputs from 0.6V to 5.5V with up to 15A output current. The controlled on-time constant frequency valley current mode architecture allows for both fast transient response and constant frequency switching in steady-state operation, independent of VIN, VOUT and load. This also provides excellent current sharing capability.
Differential output voltage sensing along with a precision internal reference combine to offer ±0.67% output regulation, even if the output ground reference deviates from local ground by 500mV. The switching frequency can be programmed from 200kHz to 1MHz with an external resistor. The switching frequency is also phase synchronizable to an external clock in applications where switching noise/EMI reduction is crucial.
Very low tON and tOFF times allow for near 0% and near 100% duty cycles, respectively. Voltage tracking soft start-up is provided for tracking and sequencing applications. Safety features include output overvoltage protection, programmable current limit with foldback, and power good monitoring.
Applications
- Distributed Power System
- Point-of-Load Converters
- Servers
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC3613EWKH#PBF | 56-Lead QFN (7mm x 7mm x 0.75mm w/ EP) | ||
| LTC3613EWKH#TRPBF | 56-Lead QFN (7mm x 7mm x 0.75mm w/ EP) | ||
| LTC3613IWKH#PBF | 56-Lead QFN (7mm x 7mm x 0.75mm w/ EP) | ||
| LTC3613IWKH#TRPBF | 56-Lead QFN (7mm x 7mm x 0.75mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Circuit Monitors 1 | ||
| LTC2960 | RECOMMENDED FOR NEW DESIGNS | 36V Nano-Current Two-Input Voltage Monitor |
| Hot Swap Controllers 2 | ||
| LTC4218 | RECOMMENDED FOR NEW DESIGNS | Hot Swap Controller |
| LT4363 | RECOMMENDED FOR NEW DESIGNS | High Voltage Surge Stopper with Current Limit |
| Oscillators 1 | ||
| LTC6908 | Resistor Set SOT-23 Oscillator with Spread Spectrum Modulation | |
| Switching Regulators & Controllers 1 | ||
| LTC7130 | RECOMMENDED FOR NEW DESIGNS | 20V 20A Monolithic Buck Converter with Ultralow DCR Sensing |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC3613
LTpowerCAD 2
- LTC3613 Project - 24V, 15A Monolithic Buck Regulator with Rsense Current Sensing (4.5-24V to 1.5V @ 15A)
- LTC3613 Project - 24V, 15A Monolithic Buck Regulator with Inductor DCR Current Sensing (4.5-24V to 1.5V @ 15A)
Design tools for the following parts are available in LTpowerCAD:
- LTC3613
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.
Evaluation Kits
LTC3613EWKH Demo Board | VIN = 4.5V to 24V, VOUT = 1.5V @ 15A
Resources
Reference Designs
Part Used
