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1 Features

1? 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

2 Applications

? Broadband, Networking and Wireless

Communications

? High-Performance FPGAs, ASICs and

Microprocessors

? Simple to Design, High Efficiency Point of Load

Regulation from a 5-V or 3.3-V Bus

3 Description

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.