LMR12007YMK集成电路（IC）的稳压器-DC-DC开关稳压器规格书PDF中文资料

1FEATURES

23• Thin SOT-6 Package

• 3.0V to 18V Input Voltage Range

• 1.25V to 16V Output Voltage Range

• 750mA Output Current

• 550kHz (LMR12007Y) and 1.6MHz (LMR12007X)

Switching Frequencies

• 350mΩ NMOS Switch

• 30nA Shutdown Current

• 1.25V, 2% Internal Voltage Reference

• Internal Soft-Start

• Current-Mode, PWM Operation

• WEBENCH® Online Design Tool

• Thermal Shutdown

APPLICATIONS

• Local Point of Load Regulation

• Core Power in HDDs

• Set-Top Boxes

• Battery Powered Devices high•

USB Powered Devices

• DSL Modems

• Notebook Computers

DESCRIPTION

The LMR12007 regulator is a monolithic, high

frequency, PWM step-down DC/DC converter in a 6- pin Thin SOT 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 and online

design support through WEBENCH®, the LMR12007

is easy to use. The ability to drive 750mA loads with

an internal 350mΩ NMOS switch using state-of-the-

art 0.5μm BiCMOS technology results in the best

power density available. The world class control

circuitry allows for on-times as low as 13ns, thus supporting exceptionally high frequency conversion

over the entire 3V to 18V input operating range down

to the minimum output voltage of 1.25V. Switching

frequency is internally set to 550kHz (LMR12007Y) or

1.6MHz (LMR12007X), allowing the use of extremely small surface mount inductors and chip capacitors.

Even though the operating frequencies are very high,

efficiencies up to 90% are easy to achieve. External

shutdown is included, featuring an ultra-low stand-by current of 30nA. The LMR12007 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.