The LM2735-Q1 device is an easy-to-use, space-efficient 2.1-A low-side switch regulator,
ideal for boost and SEPIC DC/DC regulation. The device provides all the active functions to provide
local DC-DC conversion with fast-transient response and accurate regulation in the smallest PCB
area. Switching frequency is internally set to either 520 kHz or 1.6 MHz, allowing the use of
extremely small surface mount inductor and chip capacitors, while providing efficiencies of up to
90%. The device can be used as a post-boost, boosting from the main automotive system 3.3V rail to
power CAN transceivers and other circuits requiring 5V. The 24V output capability allows the
LM2735-Q1 to power audio amplifiers, antenna, power-over-coax (PoC), and automotive audio bus (A2B)
devices as well.
Current-mode control and internal compensation provide ease-of-use, minimal component
count, and high-performance regulation over a wide range of operating conditions. External shutdown
features an ultra-low standby current of 80 nA, ideal for portable applications. Tiny SOT-23 and
WSON packages provide space savings. Additional features include internal soft start, circuitry to
reduce inrush current, pulse-by-pulse current limit, and thermal shutdown.
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