LTC7813
RECOMMENDED FOR NEW DESIGNSLow IQ, 60V Synchronous Boost+Buck Controller
- Part Models
- 8
- 1ku List Price
- Starting From $7.28
Overview
- Synchronous Boost and Buck Controllers
- When Cascaded, Allows VIN Above, Below, or Equal to Regulated VOUT of Up to 60V
- Wide Bias Input Voltage Range: 4.5V to 60V
- Output Remains in Regulation Through Input Dips (e.g. Cold Crank) Down to 2.2V
- Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE)
- Low EMI with Low Input and Output Ripple
- Fast Output Transient Response
- No External Bootstrap Diodes Required
- High Light Load Efficiency
- Low Operating IQ: 29μA (One Channel On)
- Low Operating IQ: 34μA (Both Channels On)
- RSENSE or Lossless DCR Current Sensing
- Buck Output Voltage Range: 0.8V ≤ VOUT ≤ 60V
- Boost Output Voltage Up 60V
- Phase-Lockable Frequency (75kHz to 850kHz)
- Small 32-Pin 5mm × 5mm QFN Package
The LTC7813 is a high performance synchronous Boost+Buck DC/DC switching regulator controller that drives all N-channel power MOSFET stages. It contains independent step-up (boost) and step-down (buck) controllers that can regulate two separate outputs or be cascaded to regulate an output voltage from an input voltage that can be above, below, or equal to the output voltage. The LTC7813 operates from a wide 4.5V to 60V input supply range. When biased from the output of the boost regulator, the LTC7813 can operate from an input supply as low as 2.2V after start-up. The 34μA no-load quiescent current (both channels on) extends operating runtime in battery-powered systems.
Unlike conventional buck-boost regulators, the LTC7813’s cascaded Boost+Buck solution has continuous, nonpulsating, input and output currents, substantially reducing voltage ripple and EMI. The LTC7813 has independent feedback and compensation points for the boost and buck regulation loops, enabling a fast output transient response that can be externally optimized.
Applications
- Automotive and Industrial Power Systems
- High Power Battery Operated Systems
Documentation
Data Sheet 1
User Guide 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 |
|---|---|---|---|
| LTC7813EUH#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC7813EUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC7813HUH#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC7813HUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC7813IUH#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC7813IUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC7813MPUH#PBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) | ||
| LTC7813MPUH#TRPBF | 32-Lead QFN (5mm x 5mm x 0.75mm w/ EP) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
Tools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC7813
LTpowerCAD 2
- LTC7813 (Buck) Project - DC2435A-C 5-56Vin to 5Vout, 8A, 200kHz
- LTC7813 (Boost) Project - DC2435A-C 4-24Vin to 24Vout, 3A, 200kHz
Design tools for the following parts are available in LTpowerCAD:
- LTC7813(BOOST)
- LTC7813(BUCK)
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
LTC7813EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 56V; VOUT1 (Quasi Regulated) = 19V-28.6V @ 5A
Resources
LTC7813EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 56V; Dual Output, VBoost = 24V @ 3A, Vbuck = 5V @ 8A
Resources
LTC7813EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 56V; VOUT1 = 24V @ 5A