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Analog Devices LT8711
Micropower Synchronous Multitopology Controller Controller with 42V input Capability
Overview
| Topology | Other Topology |
| Input voltage | 16-40 V |
| Switching frequency | 85-825 kHz |
| Output 1 | 12 V / 3.5 A |
| IC revision | 1.0 |
Description
The LT®8711 is a multi-topology current mode PWM controllerthat can easily be configured as a synchronous buck,boost, SEPIC, ZETA or as a nonsynchronous buck-boostconverter. Its dual gate drive voltage inputs optimize gatedriver efficiency.The 15μA no-load quiescent current with the output voltagein regulation extends operating run-time in battery poweredsystems. Low ripple Burst Mode operation enables highefficiency at very light loads while maintaining low outputvoltage ripple. The LT8711's fixed switching frequency canbe set from 100kHz to 750kHz or can be synchronized toan external clock
Features
Easily Configurable as a Synchronous Buck, Boost,SEPIC, ZETA or Nonsynchronous Buck-Boost Converternn Wide Input Range: 4.5V to 42V (VIN Can Operateto 0V, when EXTVCC > 4.5V)nn Automatic Low Noise Burst Mode® Operationnn Low IQ in Burst Mode Operation (15μA Operating)nn Input Voltage Regulation for High Impedance Sourcenn 100% Duty Cycle in Dropout (Buck Mode)nn 2A Gate Drivers (BG and TG)nn Adjustable Soft-Start with One Capacitornn Frequency Programmable from 100kHz to 750kHznn Can Be Synchronized to External Clocknn Available in 20-Lead TSSOP and 20-Lead 3mm×4mmQFN Packages
Typical applications
- General Purpose DC/DC Conversion,Solar Panel Power Converter,nn Industrial Supplies
- Automotive Systems
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L1 (µH) | L2 (µH) | n | IR (A) | IR 2 (A) | ISAT (A) | ISAT1 (A) | ISAT2 (A) | RDC1 typ (mΩ) | RDC2 typ (mΩ) | RDC1 max (mΩ) | RDC2 max (mΩ) | RDC 1 (mΩ) | RDC 2 (mΩ) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 744851220 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-DCT Toroidal Double Power Choke | 2.2 | 2.2 | – | 8.6 | 8.6 | 17 | – | – | 7.4 | 7.4 | 8.5 | 8.5 | – | – | ||
 | 74485540220 | SPEC | 7 files | Active i| Production is active. Expected lifetime: >10 years. | WE-CFWI Coupled Flatwire Inductor | 2.2 | 2.2 | 1:1 | 18 | 18 | – | 35 | 35 | – | – | – | – | 4.2 | 4.2 |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 744851220 | SPEC | |
| 74485540220 | SPEC |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Status | Product series | L1 (µH) | L2 (µH) | n | IR (A) | IR 2 (A) | ISAT (A) | ISAT1 (A) | ISAT2 (A) | RDC1 typ (mΩ) | RDC2 typ (mΩ) | RDC1 max (mΩ) | RDC2 max (mΩ) | RDC 1 (mΩ) | RDC 2 (mΩ) | Samples |
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