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.