3-75V Wide Vin, Current Mode Non-Synchronous Buck-Boost Controller
Product details
Parameters
Package | Pins | Size
Features
- Ultra-Wide Input Voltage Range From 3 V to 75 V
- Emulated Peak Current Mode Control
- Smooth Transition Between Step-Down and Step-Up Modes
- Switching Frequency Programmable to 500 KHz
- Oscillator Synchronization Capability
- Internal High Voltage Bias Regulator
- Integrated High and Low-Side Gate Drivers
- Programmable Soft-Start Time
- Ultra-Low Shutdown Current
- Enable Input Wide Bandwidth Error Amplifier
- 1.5% Feedback Reference Accuracy
- Thermal Shutdown
- Package: 20-Pin HTSSOP (Exposed Pad)
- Create a Custom Design Using the LM5118 With the WEBENCH® Power Designer
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Description
The LM5118 wide voltage range Buck-Boost switching regulator controller features all of the functions necessary to implement a high-performance, cost-efficient Buck-Boost regulator using a minimum of external components. The Buck-Boost topology maintains output voltage regulation when the input voltage is either less than or greater than the output voltage, making it especially suitable for automotive applications. The LM5118 operates as a buck regulator while the input voltage is sufficiently greater than the regulated output voltage and gradually transitions to the buck-boost mode as the input voltage approaches the output. This dual-mode approach maintains regulation over a wide range of input voltages with optimal conversion efficiency in the buck mode and a glitch-free output during mode transitions. This easy-to-use controller includes drivers for the high-side buck MOSFET and the low-side boost MOSFET. The regulators control method is based upon current mode control using an emulated current ramp. Emulated current mode control reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of the very small duty cycles necessary in high input voltage applications. Additional protection features include current limit, thermal shutdown and an enable input. The device is available in a power-enhanced, 20-pin HTSSOP package featuring an exposed die attach pad to aid thermal dissipation.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The LM5118 evaluation board is designed to provide the design engineer with a fully functional, Emulated Current Mode Control, buck-boost power converter to evaluate the LM5118 controller IC. The evaluation board provides a 12V output with 3A of output current capability. The evaluation board's wide (...)
Description
The BuckBoost Experiments Board is one board as part of the Texas Instruments Power Management Lab Kit (TI-PMLK) Series. The BuckBoost Experiments Board uses the LM5118 IC. The BuckBoost Experiments Board has an accompanying book that steps individuals through several experiments to (...)
Features
- Expanding the BuckBoost topology knowledge using the LM5118
- The BuckBoost board is configurable with jumpers for different exercises
- The BuckBoost Board is accompanied by a downloadable BuckBoost Experiments Book
Description
The BuckBoost Experiments Board is one board as part of the Texas Instruments Power Management Lab Kit (TI-PMLK) Series. The BuckBoost Experiments Board uses the LM5118 IC. The box that is shipped will contain the TI-PMLKBUCKBOOSTEVM Hardware along with a bound version of the BuckBoost (...)
Features
- Expanding the BuckBoost topology knowledge using the LM5118
- The BuckBoost board is configurable with jumpers for different exercises
- The BuckBoost Board is accompanied by a bound version of the BuckBoost Experiments Book
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
- (...)
Reference designs
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| HTSSOP (PWP) | 20 | View options |
Ordering & quality
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- 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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