1 Features
1• AEC-Q100 Qualified for Automotive Applications:
– Device Temperature Grade 1: -40°C to
+125°C, TA
• Thin SOT-6 Package
• 3-V to 20-V Input Voltage Range
• 0.8-V to 18-V Output Voltage Range
• 1-A Output Current
• 550-kHz (LM2734Y) and 1.6-MHz (LM2734X)
Switching Frequencies
• 300-mΩ NMOS Switch
• 30-nA Shutdown Current
• 0.8-V, 2% Internal Voltage Reference
• Internal Soft Start
• Current-Mode, PWM Operation
• Thermal Shutdown
• Create a Custom Design Using the LM2734-Q1
With WEBENCH® Power Designer

2 Applications
• Automotive
• Local Point-of-Load Regulation
• Advanced Driver Assistance Systems (ADAS)

3 Description
The LM2734-Q1 regulator is a monolithic, highfrequency,
PWM step-down DC/DC converter in a 6-
pin Thin SOT package. The device 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 LM2734-Q1
regulator is easy to use. The ability to drive 1-A loads
with an internal 300-mΩ NMOS switch using state-ofthe-
art 0.5-μm BiCMOS technology results in the best
power density available. The world-class control
circuitry allows for on-times as low as 13 ns, thus
supporting exceptionally high-frequency conversion
over the entire 3-V to 20-V input operating range
down to the minimum output voltage of 0.8 V.
Switching frequency is internally set to 550 kHz
(LM2734Y) or 1.6 MHz (LM2734X), 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 standby current of 30 nA.
The LM2734-Q1 regulator uses current-mode control
and internal compensation to provide highperformance
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 overvoltage protection.