LTC7815 - Low IQ, 2.25MHz, Triple Output, Buck/Buck/Boost Synchronous Controller
Datasheet Documentation
Press Release


Typical Application

LTC7815 Typical Application
LTC7815 Typical Application


The LTC®7815 is a high performance triple output (buck/ buck/boost) synchronous DC/DC switching regulator controller that drives all N-channel power MOSFET stages. Constant frequency current mode architecture allows a phase-lockable switching frequency of up to 2.25MHz. The LTC7815 operates from a wide 4.5V to 38V input supply range. When biased from the output of the boost converter or another auxiliary supply, the LTC7815 can operate from an input supply as low as 2.5V after start-up.

The 28μA no-load quiescent current extends operating runtime in battery powered systems. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC7815 features a precision 0.8V reference for the bucks, 1.2V reference for the boost and a power good output indicator. The PLLIN/MODE pin selects among Burst Mode operation, pulse-skipping mode, or continuous inductor current mode at light loads.


5x7 QFN-38

LTC7815 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
LTC7815HUHF#PBF QFN 38 H $7.40 $5.18
LTC7815EUHF#PBF QFN 38 E $6.22 $4.35
LTC7815IUHF#PBF QFN 38 I $6.97 $4.88
LTC7815IUHF#TRPBF QFN 38 I $7.03 $4.94
LTC7815EUHF#TRPBF QFN 38 E $6.28 $4.41
LTC7815HUHF#TRPBF QFN 38 H $7.46 $5.24
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC2738A LTC7815EUHF Demo Board | 4.5V ≤ VIN ≤ 36V; VOUT1: 5V @ 8A, VOUT2: 3.3V @ 8A, VOUT3: 10V @ 7A Contact Factory