LTC7817JUHF#WPBF
ActiveDC/DC CONTROLLER, SYNCHRONOUS BOOST, SYNCHRONOUS BUCK, 4.5 TO 40V SUPPLY, 3 OUTPUT, 100% DUTY CYCLE
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LTC7817JUHF#WPBF
ActiveDC/DC CONTROLLER, SYNCHRONOUS BOOST, SYNCHRONOUS BUCK, 4.5 TO 40V SUPPLY, 3 OUTPUT, 100% DUTY CYCLE
Technical Specifications
Parameters and characteristics for this part
| Specification | LTC7817JUHF#WPBF |
|---|---|
| Clock Sync | True |
| Control Features | Current Limit, Frequency Control, Enable |
| Duty Cycle (Max) [Max] | 100 % |
| Frequency - Switching [Max] | 3 MHz |
| Frequency - Switching [Min] | 100 kHz |
| Function | Step-Down, Step-Up |
| Mounting Type | Surface Mount |
| Number of Outputs | 3 |
| Operating Temperature [Max] | 150 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 2 |
| Output Type | Transistor Driver |
| Package / Case | 38-WFQFN Exposed Pad |
| Synchronous Rectifier | True |
| Topology | Boost, Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 40 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 4.5 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
Description
General part information
LTC7817 Series
The LTC7817 is a high performance triple output (buck/buck/boost) synchronous DC/DC switching regulator controller that drives all N-channel power MOSFET stages. Its constant frequency current mode architecture allows a phase-lockable switching frequency of up to 3MHz. The LTC7817 operates from a wide 4.5V to 40V input supply range. When biased from the output of the boost converter or another auxiliary supply, the LTC7817 can operate from an input supply as low as 1V after start-up.The very low no-load quiescent current extends operating run time 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 LTC7817 features a precision 0.8V reference for the bucks, 1.2V reference for the boost and a power good output indicator.The LTC7817 synchronous boost Pass-Thru capability minimizes losses in automotive start-stop applications.APPLICATIONSAutomotive and TransportationIndustrialMilitary/Avionics