Low Iq, Wide Input Range Synchronous Buck Controller
Product details
Parameters
Package | Pins | Size
Features
- –40ºC to +125ºC Ambient Operating Temperature Range
- An AEC-Q100 Qualified Device is Available
- VIN 3.8 V to 65 V (70 V Absolute Maximum)
- Output: Fixed 3.3 V, 5 V, or Adjustable From
1.5 V - 15 V with ±0.8% Accuracy - Fixed 2.2 MHz or 440 kHz Switching Frequency with ±5% Accuracy
- High-Side and Low-Side Gate Drive With Slew Rate Control
- Optional Frequency Shift by Varying an Analog Voltage or RT Resistor
- Optional Synchronization to an External Clock
- Optional Spread Spectrum
- Shutdown Mode IQ: 10 µA Typical
- Low Standby Mode IQ: 35 µA Typical
- 75 mV Current Limit Threshold with ±0.9% Accuracy
- External Resistor or DCR Current Sensing
- Output Enable Logic Input
- Hiccup Mode for Sustained Overload
- Power Good Indication Output
- Selectable Diode Emulation or Forced Pulse Width Modulation
- QFN-24 Package with Wettable Flanks
- Create a Custom Design Using the LM5141 With the WEBENCH® Power Designer
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Description
The LM5141 is a synchronous buck controller, intended for high voltage wide VIN step-down converter applications. The control method is peak current mode control. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting, and ease of loop compensation. The LM5141 features slew rate control to simplify the compliance with EMI requirements.
The LM5141 has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate Drivers with Slew Rate Control that can be adjusted to reduce EMI.
In light or no-load conditions, the LM5141 operates in skip cycle mode for improved low power efficiency. The LM5141 has a high voltage bias regulator with automatic switch-over to an external bias to reduce the IQ current from VIN. Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup mode fault protection for sustained overload, and power good output.
Technical documentation
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- VIN 5.5V to 42V
- 5.0V @5A
- 2.2MHz operation to avoid the Aumotive AM Band
- Low Shutdown IQ 10µA
- Low Standby Current 35µA the output inregualtion, no-load
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
- (...)
Features
- Determine buck inductance and input and output capacitances
- Select components for soft-start, hiccup-mode restart, OCP, switching frequency and output voltage setpoint(s)
- Optimize compensation values and pole/zero placement in terms of control loop stability using crossover frequency as a performance (...)
Reference designs
Design files
-
download TIDEP-01022 BOM.pdf (335KB) -
download TIDEP-01022 Assembly Files.zip (227KB) -
download TIDEP-01022 PCB.pdf (141KB) -
download TIDEP-01022 CAD Files.zip (3704KB) -
download TIDEP-01022 Gerber.zip (861KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VQFN (RGE) | 24 | 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
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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