Packaging information
| Package | Pins HTSSOP (PWP) | 20 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 250 | SMALL T&R |
Features for the LM21212-2
- Integrated 7-mΩ High Side and 4.3-mΩ Low-Side FET Switches
- 300-kHz to 1.55-MHz Resistor-Adjustable Frequency
- Adjustable Output Voltage from 0.6 V to VIN (100% Duty Cycle Capable), ±1% Reference
- Input Voltage Range 2.95 V to 5.5 V
- Startup Into Prebiased Loads
- Output Voltage Tracking Capability
- Wide Bandwidth Voltage Loop Error Amplifier
- Adjustable Soft-Start With External Capacitor
- Precision Enable Pin With Hysteresis
- Integrated OVP, OCP, OTP, UVLO, and Power-Good
- Thermally Enhanced 20-Pin HTSSOP Exposed Pad Package
- Create a custom design using the LM21212-2 with the WEBENCH® Power Designer
Description for the LM21212-2
The LM21212-2 is a monolithic synchronous buck regulator that is capable of delivering up to 12 A of continuous output current while producing an output voltage down to 0.6 V with outstanding efficiency. The device is optimized to work over an input voltage range of 2.95 V to 5.5 V, making it suitable for a wide variety of low voltage systems. The voltage mode control loop provides high noise immunity and narrow duty-cycle capability, and it can be compensated to be stable with any type of output capacitance, providing maximum flexibility and ease of use.
The LM21212-2 features internal overvoltage protection (OVP) and overcurrent protection (OCP) for increased system reliability. A precision enable pin and integrated UVLO allow turnon of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated power good circuit.
The LM21212-2 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track an external voltage rail using the SS/TRK pin. The switching frequency can be programmed between 300 kHz and 1.55 MHz with an external resistor.
If the output is prebiased at start-up, it does not sink current, allowing the output to smoothly rise past the prebiased voltage. The regulator is offered in a 20-pin HTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heat sinks.