The LM21215A is a synchronous buck DC-DC converter that delivers up to 15 A of output current at output voltages as low as 0.6 V. Operating over an input voltage range of 2.95 V to 5.5 V with ultra-high efficiency, the LM21215A suits a wide variety of low voltage systems. The voltage-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 output capacitor, providing maximum flexibility and ease of use.
The LM21215A features internal overvoltage protection (OVP) and cycle-by-cycle overcurrent protection (OCP) for increased system reliability. A precision enable pin and integrated UVLO allow turn-on of the device to be tightly controlled and sequenced. Startup inrush currents are limited by an internally-fixed or externally-adjustable soft-start circuit. An integrated open-drain PGOOD indicator provides fault reporting and supply sequencing.
Other features include auxiliary voltage rail tracking, monotonic startup into pre-biased loads, and switching frequency synchronization to an external clock signal between 300 kHz and 1.5 MHz for beat-frequency sensitive and multi-regulator applications. The LM21215A is offered in a thermally-enhanced 20-pin HTSSOP package with an exposed pad that is soldered to the PCB to achieve a very low junction-to-board thermal impedance.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM21215A 2.95-V to 5.5-V,15-A, Voltage-Mode Synchronous Buck Converter With Frequency Synchronization datasheet (Rev. D) | PDF | HTML | 23 May 2019 |
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| User guide | AN-2176 LM10010 Evaluation Board (Rev. B) | 06 May 2013 | ||
| User guide | AN-2131 LM21215A-1 Evaluation Board (Rev. A) | 05 May 2013 |
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Welcome to the LM21215A-1 quickstart design tool. This standalone tool facilitates and assists the power supply engineer with design of a DC/DC buck regulator based on the LM21215A-1 voltage-mode PWM converter. As such, the user can expeditiously arrive at an optimized design to meet the (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTSSOP (PWP) | 20 | Ultra Librarian |
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