All trademarks are the property of their respective owners.
DescriptionThe LM21215AMHX-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 LM21215AMHX-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 LM21215AMHX-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 LM21215AMHX-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 OutputVoltage From 0.6 V to VIN
- Output Current as High as 15A
- Frequency Synchronization 300 kHz to 1.5 MHz
- Integrated 7-m? PMOS Buck Switch Supports 100% Duty Cycle for Low DropoutVoltage
- Integrated 4.3-m? NMOS Synchronous Rectifier Eliminates SchottkyDiode
- Accurate ±1% Internal Voltage Reference
- Automatic DiodeEmulation Mode for Improved Efficiency at Light Loads
- Monotonic Pre-BiasedStartup
- Internal 0.5-ms or Externally Adjustable Soft Start
- OutputVoltage Tracking Capability
- Ultra-Fast Line and Load Transient Response
- Voltage-Mode PWM Control
- Wide-Bandwidth Voltage Loop ErrorAmplifier
- Precision Enable with Hysteresis
- Integrated OVP, UVP, OCP, and UVLO
- Open-Drain Power GoodIndicator
- Thermal Shutdown Protection With Hysteresis
- Thermally-Enhanced HTSSOP-20 Package
- Create a custom design using the LM21215A with theWEBENCH? Power Designer
All trademarks are the property of their respective owners.
DescriptionThe LM21215A 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 LM21215A 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 LM21215A 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 LM21215A 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.
