LM25145 Description
The LM25145 42-V synchronous buck controller is designed to regulate from a high input voltage source or from an input rail subject to high voltage transients, minimizing the need for external surge suppression ponents. A high-side switch minimum on-time of 40 ns facilitates large step-down ratios, enabling the direct step-down conversion from a 24 V nominal input to low-voltage rails for reduced system plexity and...
LM25145 Key Features
- 1 Versatile Synchronous Buck DC-DC Controller
- Wide Input Voltage Range of 6 V to 42 V
- Adjustable Output Voltage From 0.8 V to 40 V
- Meets EN55022 / CISPR 22 EMI Standards
- Lossless RDS(on) or Shunt Current Sensing
- Switching Frequency From 100 kHz to 1 MHz
- SYNC In and SYNC Out Capability
- 40-ns Minimum On-Time for High VIN / VOUT Ratio
- 140-ns Minimum Off-Time for Low Dropout
- 0.8-V Reference With ±1% Feedback Accuracy