The LM21215AMHE-1/NOPB is a synchronous buck DC-DC converter that delivers up to 15 A of outputcurrent at output voltages as low as 0.6 V. Operating over an input voltage range of 2.95 V to 5.5V with ultra-high efficiency, the LM21215AMHE-1/NOPB suits a wide variety of low voltage systems. Thevoltage-mode control loop with high gain-bandwidth error amplifier provides high noise immunity,narrow duty cycle capability and is easily compensated for stable operation with any type of outputcapacitor, providing maximum flexibility and ease of use.
The LM21215AMHE-1/NOPB features internal overvoltage protection (OVP) and cycle-by-cycleovercurrent protection (OCP) for increased system reliability. A precision enable pin andintegrated UVLO allow turn-on of the device to be tightly controlled and sequenced. Startup inrushcurrents are limited by an internally-fixed or externally-adjustable soft-start circuit. Anintegrated open-drain PGOOD indicator provides fault reporting and supply sequencing.
Other features include auxiliary voltage rail tracking, monotonic startup intopre-biased loads, and switching frequency synchronization to an external clock signal between 300kHz and 1.5 MHz for beat-frequency sensitive and multi-regulator applications. The LM21215AMHE-1/NOPB isoffered in a thermally-enhanced 20-pin HTSSOP package with an exposed pad that is soldered to thePCB to achieve a very low junction-to-board thermal impedance.
Feature
- High-Efficiency Synchronous DC/DC Converter
- Input Voltage Range of 2.95 V to 5.5 V
- Adjustable Output Voltage From 0.6 V to VIN
- Output Current as High as 15 A
- Frequency Synchronization 300 kHz to 1.5 MHz
- Integrated 7-m PMOS Buck Switch Supports 100% Duty Cycle for Low Dropout Voltage
- Integrated 4.3-m NMOS Synchronous Rectifier Eliminates Schottky Diode
- Accurate ±1% Internal Voltage Reference
- Automatic Diode Emulation Mode for Improved Efficiency at Light Loads
- Monotonic Pre-Biased Startup
- Internal 0.5-ms or Externally Adjustable Soft Start
- Output Voltage Tracking Capability
- Ultra-Fast Line and Load Transient Response
- Voltage-Mode PWM Control
- Wide-Bandwidth Voltage Loop Error Amplifier
- Precision Enable with Hysteresis
- Integrated OVP, UVP, OCP, and UVLO
- Open-Drain Power Good Indicator
- Thermal Shutdown Protection With Hysteresis
- Thermally-Enhanced HTSSOP-20 Package
- Create a custom design using the LM21215A with the WEBENCH Power Designer
