The LM21212-1 is a monolithic synchronous point of load 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 LM21212-1 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 LM21212-1 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 synchronized to the falling edge of a clock between frequencies of 300kHz to 1.5MHz.

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.

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Integrated 7.0 m? high side and 4.3 m? low side FET switches

300 kHz to 1.5 MHz frequency SYNC pin

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

• Vin (Min) (V)
• 2.95
• Vin (Max) (V)
• 5.5
• Vout (Min) (V)
• 0.6
• Vout (Max) (V)
• 5.5
• Iout (Max) (A)
• 12
• Iq (Typ) (uA)
• 1500
• Switching frequency (Min) (kHz)
• 300
• Switching frequency (Max) (kHz)
• 1500
• Features
• Enable, Frequency Synchronization, Power Good, Pre-Bias Start-Up, Synchronous Rectification, Tracking
• Rating
• Catalog
• Regulated outputs (#)
• 1
• Control mode
• Voltage Mode
• Duty cycle (Max) (%)
• 100

LM21212-1的完整型号有：LM21212MH-1/NOPB、LM21212MHE-1/NOPB、LM21212MHX-1/NOPB，以下是这些产品的关键参数及官网采购报价：

LM21212MH-1/NOPB，工作温度：-40 to 125，封装：HTSSOP (PWP)-20，包装数量MPQ：73个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网LM21212MH-1/NOPB的批量USD价格：3.102（1000+）

LM21212MHE-1/NOPB，工作温度：PropertyValue，封装：HTSSOP (PWP)-20，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网LM21212MHE-1/NOPB的批量USD价格：3.102（1000+）

LM21212MHX-1/NOPB，工作温度：-40 to 125，封装：HTSSOP (PWP)-20，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网LM21212MHX-1/NOPB的批量USD价格：2.585（1000+）

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