55-V wide VIN synchronous 4-switch buck-boost controller, AEC-Q100 qualified
Product details
Parameters
Package | Pins | Size
Features
- AEC-Q100 qualified for automotive applications
- Temperature grade 1: -40°C to 125°C TA
- Functional Safety-Capable
- Single inductor buck-boost controller for step-up/step-down DC/DC conversion
- Wide VIN: 4.2 V (2.5 V with bias) to 55 V (60 V maximum)
- Flexible VOUT: 0.8 V to 55 V
- VOUT short protection
- High efficiency buck-boost transition
- Adjustable switching frequency
- Optional frequency sync and dithering
- Integrated 2-A MOSFET gate drivers
- Cycle-by-cycle current limit and optional hiccup
- Optional input or output average current limiting
- Programmable input UVLO and soft-start
- Power good and output overvoltage protection
- Available in HTSSOP-28 package
- Create a custom design using the LM5176-Q1 with the WEBENCH Power Designer
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Description
The LM5176-Q1 is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output voltage at, above, or below the input voltage. The LM5176-Q1 operates over a wide input voltage range of 4.2 V to 55 V (60 V absolute maximum) to support a variety of applications.
The LM5176-Q1 employs current-mode control both in buck and boost modes of operation for superior load and line regulation. The switching frequency is programmed by an external resistor and can be synchronized to an external clock signal.
The device also features a programmable soft-start function and offers protection features including cycle-by-cycle current limiting, input undervoltage lockout (UVLO), output overvoltage protection (OVP), and thermal shutdown. In addition, the LM5176-Q1 features optional average input or output current limiting, optional spread spectrum to reduce peak EMI, and optional hiccup mode protection in sustained overload conditions.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | LM5176-Q1 55-V Wide VIN Synchronous 4-Switch Buck-Boost Controller datasheet (Rev. A) | Jun. 09, 2020 |
| Functional safety information | LM5176 and LM5176-Q1 Functional Safety, FIT Rate, Failure FMD | May 22, 2020 | |
| Technical article | Four-switch buck-boost layout tip No. 4: routing gate-drive and return paths | Feb. 20, 2019 | |
| Application note | LM5176 Power Sharing Between Two Parallel, Four-Switch Buck-Boost Converters | Jul. 16, 2018 | |
| White paper | An overview of radiated EMI specifications for power supplies | Jun. 05, 2018 | |
| White paper | An overview of conducted EMI specifications for power supplies | Feb. 01, 2018 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- High power design
- Wide input voltage range of 6V-36V
- High efficiency, synchronous buck-boost conversion
- 250 kHz switching frequency
- Flexible design using standard 5mm x 6mm FETs
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| HTSSOP (PWP) | 28 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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Support & training
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