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1FEATURES

2? Input Voltage Range of 3.0V to 5.5V

? Output Voltage Range of 0.6V to 4.5V

? 2.0A Output Current

? High Switching Frequencies

– 1.6MHz (LM2832X)

– 0.55MHz (LM2832Y)

– 3.0MHz (LM2832Z)

? 150mΩ PMOS Switch

? 0.6V, 2% Internal Voltage Reference

? Internal Soft-Start

? Current Mode, PWM Operation

? Thermal Shutdown

? Over Voltage Protection

APPLICATIONS

? Local 5V to Vcore Step-Down Converters

? Core Power in HDDs

? Set-Top Boxes

? USB Powered Devices

? DSL Modems

DESCRIPTION

The LM2832 regulator is a monolithic, high frequency,

PWM step-down DC/DC converter in a 6 Pin WSON

and a 8 Pin eMSOP-PowerPAD package. It provides

all the active functions to provide local DC/DC

conversion with fast transient response and accurate

regulation in the smallest possible PCB area. With a minimum of external components, the LM2832 is

easy to use. The ability to drive 2.0A loads with an

internal 150 mΩ PMOS switch using state-of-the-art

0.5 μm BiCMOS technology results in the best power

density available. The world-class control circuitry

allows on-times as low as 30ns, thus supporting

exceptionally high frequency conversion over the

entire 3V to 5.5V input operating range down to the

minimum output voltage of 0.6V. Switching frequency

is internally set to 550 kHz, 1.6 MHz, or 3.0 MHz,

allowing the use of extremely small surface mount

inductors and chip capacitors. Even though the

operating frequency is high, efficiencies up to 93%

are easy to achieve. External shutdown is included,

featuring an ultra-low stand-by current of 30 nA. The

LM2832 utilizes current-mode control and internal

compensation to provide high-performance regulation

over a wide range of operating conditions. Additional

features include internal soft-start circuitry to reduce

inrush current, pulse-by-pulse current limit, thermal

shutdown, and output over-voltage protection.