LM21212-2 - 具有可调频率的 2.95-5.5V、12A、电压模式同步负载点降压稳压器

LM21212-2是TI德州仪器公司的一款转换器（集成开关）产品，LM21212-2是具有可调频率的 2.95-5.5V、12A、电压模式同步负载点降压稳压器，本站介绍了LM21212-2的封装应用图解、特点和优点、功能等，并给出了与LM21212-2相关的TI元器件型号供参考。

LM21212-2 - 具有可调频率的 2.95-5.5V、12A、电压模式同步负载点降压稳压器 - 转换器（集成开关） - DC/DC开关稳压器 - 德州仪器

产品描述

The LM21212-2 is a monolithic synchronous buck regulator that is capable of delivering up to 12A of continuous output current while producing an output voltage down to 0.6V with outstanding efficiency. The device is optimized to work over an input voltage range of 2.95V to 5.5V, making it suited for a wide variety of low voltage systems. The voltage mode control loop provides high noise immunity, narrow duty cycle capability and can be compensated to be stable with any type of output capacitance, providing maximum flexibility and ease of use.

The LM21212-2 features internal over voltage protection (OVP) and over-current 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 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 pre-biased at startup, it will not sink current, allowing the output to smoothly rise past the pre-biased voltage. The regulator is offered in a 20-pin eTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.

产品特性

Integrated 7.0 mΩ high side and 4.3 mΩ low side FET switches

300 kHz to 1.55 MHz resistor-adjustable frequency

Adjustable output voltage from 0.6V to VIN (100% duty cycle capable), ±1% reference

Input voltage range 2.95V to 5.5V

Startup into pre-biased 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 eTSSOP-20 exposed pad package

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