The LTM4637IV#PBF is a complete 20A output high efficiency switch mode step-down DC/DC μModule (power module) regulator. Included in the package are the switching controller, power FETs, inductor and compensation components. Operating over an input voltage range from 4.5V to 20V, the LTM4637IV#PBF supports an output voltage range of 0.6V to 5.5V, set by a single external resistor. Only a few input and output capacitors are needed.
Current mode operation allows precision current sharing of up to four LTM4637IV#PBF regulators to obtain up to 80A output. High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability. The device supports frequency synchronization, multiphase/current sharing, Burst Mode operation and output voltage tracking for supply rail sequencing. A diode-connected PNP transistor is available for use as an internal temperature monitor.
The LTM4637IV#PBF is offered in 15mm × 15mm × 4.32mm LGA and 15mm × 15mm × 4.92mm packages. The LTM4637IV#PBF is available with SnPb (BGA) or RoHS compliant terminal finish. The LTM4637IV#PBF is pin compatible with the LTM4627, a 15A DC/DC μModule regulator.
Feature
- Complete 20A Switch Mode Power Supply
- 4.5V to 20V Input Voltage Range
- 0.6V to 5.5V Output Voltage Range
- ±1.5% Total DC Output Voltage Error (–40°C to 125°C)
- Differential Remote Sense Amplifier for Precision Regulation for (VOUT ≤ 3.3V)
- Current Mode Control/Fast Transient Response
- Parallel Current Sharing (Up to 80A)
- Frequency Synchronization
- Selectable Pulse-Skipping or Burst Mode® Operation
- Soft-Start/Voltage Tracking
- Up to 88% Efficiency (12VIN, 1.8VOUT)
- Overcurrent Foldback Protection
- Output Overvoltage Protection
- Internal Temperature Monitor
- Overtemperature Protection
- 15mm × 15mm × 4.32mm LGA and 15mm × 15mm × 4.92mm BGA Packages
- SnPb (BGA) or RoHS Compliant (LGA and BGA) Finish
Applications
- Telecom Servers and Networking Equipment
- Industrial Equipment
- Medical Systems
- High Ambient Temperature Systems
