The LM25141RGER is a synchronous buck controller, intended for high voltage wideVIN step-down converter applications. The control method is peak currentmode control. Current mode control provides inherent line feed-forward, cycle-by-cycle currentlimiting, and ease of loop compensation. The LM25141RGER features slew rate control to simplify thecompliance with EMI requirements.
The LM25141RGER has two selectable switching frequencies: 2.2 MHz and 440 kHz. Gate Driverswith slew rate control that can be adjusted to reduce EMI.
In light or no-load conditions, the LM25141RGER operates in skip cycle mode for improved lowpower efficiency. The LM25141RGER has a high voltage bias regulator with automatic switch-over to anexternal bias to reduce the IQ current from VIN.Additional features include frequency synchronization, cycle-by-cycle current limit, hiccup modefault protection for sustained overload, and power good output.
Feature
–40°C to +125°C Ambient Operating Temperature Range
An AEC-Q100 Qualified Device is Available
VIN 3.8 V to 45 V (47 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 LM25141 With the WEBENCH Power Designer
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
