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Overview
| Topology | Buck-Boost Converter |
| Input voltage | 36-72 V |
| Output 1 | -48 V / 2 A |
Description
The inverting buck/boost converter topology is an often mysterious and misunderstood category of DC-DC converters. This document attempts to remove any misconception around the circuit by providing a step-by-step design procedure with equations, schematics, simulations, and considerations to ensure that the circuit is properly designed.
Features
- Wide VIN + |VOUT–| Range: 4V to 140V (150V Abs Max)
- Wide Output Voltage Range: –60V to –0.8V
- Ground-Referenced Control / Interface Pins
- Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE)
- Integrated Bootstrap Diode
- Low Operating IQ: 40μA (Shutdown = 10μA)
- Selectable Gate Drive UVLO Thresholds
- Onboard LDO or External NMOS LDO for DRVCC
- EXTVCC LDO Powers Drivers from Output
- Phase-Lockable Frequency (75kHz to 850kHz)
- Programmable Fixed Frequency (50kHz to 900kHz)
- Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode® Operation at Light Loads
- Adjustable Burst Clamp and Current Limit
- Power Good Output Voltage Monitor
- Programmable Input Overvoltage Lockout
- 38-Lead TSSOP High Voltage Package
Typical applications
- Automotive and Industrial Power Systems, Telecommunications Power Supplies, Distributed Power Systems
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Wire Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCF SMT High Current Inductor, 47 µH, 12.8 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCF SMT High Current Inductor | Inductance47 µH | Performance Rated Current12.8 A | Saturation Current @ 10%7.5 A | Saturation Current @ 30%8.5 A | DC Resistance13.42 mΩ | Self Resonant Frequency10 MHz | Wire TypeFlat |