LTC7811IUJ#PBF
Active40V, LOW IQ, 3MHZ, TRIPLE OUTPUT BUCK/BUCK/BOOST CONTROLLER
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LTC7811IUJ#PBF
Active40V, LOW IQ, 3MHZ, TRIPLE OUTPUT BUCK/BUCK/BOOST CONTROLLER
Technical Specifications
Parameters and characteristics for this part
| Specification | LTC7811IUJ#PBF |
|---|---|
| Clock Sync | False |
| Control Features | Frequency Control, Power Good, Current Limit, Soft Start, Enable |
| Duty Cycle (Max) [Max] | 100 % |
| Frequency - Switching [Max] | 3 MHz |
| Frequency - Switching [Min] | 100 kHz |
| Function | Step-Up/Step-Down |
| Grade | Automotive |
| Mounting Type | Surface Mount |
| Number of Outputs | 3 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 C |
| Output Configuration | Positive |
| Output Phases | 2 |
| Output Type | Transistor Driver |
| Package / Case | 40-WFQFN Exposed Pad |
| Qualification | AEC-Q100 |
| Supplier Device Package | 40-QFN (6x6) |
| Synchronous Rectifier | True |
| Topology | Buck-Boost |
| Voltage - Supply (Vcc/Vdd) [Max] | 40 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 1 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | Updated |
|---|---|---|---|---|
| Digikey | N/A | 109 | $ 9.91 | 1m+ |
Description
General part information
LTC7811 Series
The LTC7811 is a high performance triple output (buck/buck/boost) 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 LTC7811 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 LTC7811 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 LTC7811 features a precision 0.8V reference for the bucks, 1.2V reference for the boost and a power good output indicator.The LTC7811 additionally features spread spectrum operation which significantly reduces the peak radiated and conducted noise on both the input and output supplies, making it easier to comply with electromagnetic interference (EMI) standards.APPLICATIONSAutomotive and TransportationIndustrialMilitary/Avionics
Documents
Technical documentation and resources