LMR14030SDDAR

Model:	LMR14030SDDAR
Part Number:	2019-1
Category:	Chipshooters / Chip Mounters
Model Year:	2016
Condition:	new
Location:	China
Offered by:	Jotrin Electronics Limited

The LMR14030 SIMPLE SWITCHER® regulator is an easy to use step-down DC-DC converter that operates from 4.0 V to 40 V supply voltage. It integrates a 90 mΩ (typical) high-side MOSFET, and is capable of delivering up to 3.5 A DC load current with exceptional efficiency and thermal performance in a very small solution size.
The operating current is typically 40 μA under no load condition (not switching). When the device is disabled, the supply current is typically 1 μA. An extended family is available in 2 A and 5 A load options in pin to pin compatible packages.
The LMR14030 implements constant frequency peak current mode control with Sleep-mode at light load to achieve high efficiency. The device is internally compensated, which reduces design time, and requires fewer external components.
The switching frequency is programmable from 200 kHz to 2.5 MHz by an external resistor
RT. The LMR14030 is also capable of synchronization to an external clock within the 250 kHz to 2.3 MHz frequency range, which allows the device to be optimized to fit small board space at higher frequency, or high efficient power conversion at lower frequency.
Other optional features are included for more comprehensive system requirements, including precision enable,adjustable soft-start time, and approximate 97% duty cycle by BOOT capacitor recharge circuit.
These features provide a flexible and easy to use platform for a wide range of applications. Protection features include over
temperature shutdown, VOUT over voltage protection (OVP), VIN under-voltage lockout (UVLO), cycle-by-cycle current limit, and short-circuit protection with frequency fold-back.

The LMR14030 employs fixed frequency peak current mode control.
The LMR14030 provides an integrated bootstrap voltage regulator. A small capacitor between the BOOT and SW pins provides the gate drive voltage for the high-side MOSFET.
The BOOT capacitor is refreshed when the high-side MOSFET is off and the external low side diode conducts. The recommended value of the BOOT capacitor is 0.1 μF.
A ceramic capacitor with an X7R or X5R grade dielectric with a voltage rating of 16 V or higher is recommended for stable performance over temperature and voltage.