LM27402 Overview
The LM27402 is a voltage-mode, synchronous, DC/DC step-down controller with lossless inductor DCR current sensing capability. Sensing the inductor current eliminates the need to add resistive powertrain elements, which increases overall efficiency and facilitates accurate, continuous current sensing. A 0.6-V ±1% voltage reference enables high accuracy and low voltage capability at the output.
LM27402 Key Features
- 1 Wide Input-Voltage Range of 3 V to 20 V
- Inductor DCR or Shunt Resistor Based
- 0.6-V Reference With ±1% FB Accuracy Across
- Switching Frequency from 200 kHz to 1.2 MHz
- Output Voltage as High as 95% of Input Voltage
- Integrated High-Current MOSFET Drivers
- Internal VDD Bias Supply LDO Subregulator
- External Clock Synchronization
- Adjustable Soft Start With External Capacitor
- Prebiased Start-up Capability
LM27402 Applications
- High-Current, Low-Voltage Supply for FPGA and ASIC