LTC7812

RECOMMENDED FOR NEW DESIGNS

Low I_Q, 38V Synchronous Boost+Buck Controller

Data Sheet Product Selection Table

Part Models: 6
1ku List Price: Starting From $4.78

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Part Details

Synchronous Boost and Buck Controllers
When Cascaded, Allows V_IN Above, Below or Equal to Regulated V_OUT
Output Remains in Regulation Through Input Dips (e.g., Cold Crank) Down to 2.5V
Wide Bias Input Voltage Range: 4.5V to 38V
Low Input and Output Ripple
Low EMI
Fast Output Transient Response
High Light Load Efficiency
Low Operating I_Q: 33μA (Both Channels On)
Low Operating I_Q: 28μA (Buck Channel On)
R_SENSE or Lossless DCR Current Sensing
Buck Output Voltage Range: 0.8V ≤ V_OUT ≤ 24V
Boost Output Voltage Up to 60V
Phase-Lockable Frequency (75kHz to 850kHz)
Small 32-Pin 5mm × 5mm QFN Package

Part Models: 6
1ku List Price: Starting From $4.78

Documentation

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
LTC7812EUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7812EUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7812HUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7812HUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7812IUH#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC7812IUH#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jan 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products
		PCN21_0269_Form Material_Report Detailed Change Description Qualification Results Summary
LTC7812EUH#PBF	PRODUCTION
LTC7812EUH#TRPBF	PRODUCTION
LTC7812HUH#PBF	PRODUCTION
LTC7812HUH#TRPBF	PRODUCTION
LTC7812IUH#PBF	PRODUCTION
LTC7812IUH#TRPBF	PRODUCTION
Jul 31, 2020 - 20_0245 Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)
		PCN20_0245_Form Material_Report Delta Qualification Matrix Other Qualification Results Summary
LTC7812EUH#PBF	PRODUCTION
LTC7812EUH#TRPBF	PRODUCTION
LTC7812HUH#PBF	PRODUCTION
LTC7812HUH#TRPBF	PRODUCTION
LTC7812IUH#PBF	PRODUCTION
LTC7812IUH#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Parts	Product Life Cycle	Description
LTC7813	RECOMMENDED FOR NEW DESIGNS	Low I_Q, 60V Synchronous Boost+Buck Controller

Tools & Simulations

LTspice 1

LTC7812 - PMIC and Multifunction

Models for the following parts are available in LTspice:

LTC7812

LTpowerCAD 2

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

LTC7812EUH Demo Board | Sync Boost + Sync Buck, 4V ≤ VIN ≤ 36V; VBoost = 12V, Vbuck = 12V to 5V @ 8A

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Product Details

Demonstration circuit DC2422A is a step-up + step-down DC/DC converter featuring the LTC7812EUH, a high performance dual output (Boost + Buck) synchronous DC/ DC switching regulator controller. This board has a 4V to 36V input voltage range and three different output configurations. DC2422A-A generates a regulated 12V @ 8A output using the boost and buck converter combination. DC2422A-B provides a quasi-regulated output voltage between 10V and 16V; the circuit steps voltages lower than 10V up to 10V, passes voltages between 10V and 16V, and steps voltage above 16V down to 16V, providing a loosely regulated 12V bus. DC2422A-C boosts the input voltage up to 12V and then steps this voltage down to 5V @ 8A, simulating a power supply designed to provide 5V output power even during cold crank conditions as low as 4V.