LMR36520_V01中文资料德州仪器数据手册PDF规格书

1 Features

1• Designed for reliable and rugged applications

– Input transient protection up to 70 V

– Protection features: thermal shutdown, input

undervoltage lockout, cycle-by-cycle current

limit, hiccup short-circuit protection

• Well-suited for scalable industrial power supplies

– Pin compatible with:

– LMR36510 (65 V, 1 A)

– LMR33610/LMR33620/LMR33630/

LMR33640 (36 V, 1 A, 2 A, 3 A, or 4 A)

– Internal compensation helps reduce solution

size, cost and design complexity

– 400-kHz frequency

• Wide conversion range

– Input voltage range: 4.2 V to 65 V

– Output voltage range: 1 V to 95% of VIN

• Low-power dissipation across load spectrum

– 90% efficiency: 24 VIN, 5 VOUT, 1 A at 400 kHz

– Increased light-load efficiency in PFM mode

– Low operating quiescent current of 26 μA

• Power-good output with filter and delayed release

2 Applications

• IP network cameras

• Analog security cameras

• HVAC valve and actuator control

• AC drive and servo drive control modules

• Analog input modules and mixed IO modules

• General purpose wide VIN power supply

3 Description

The LMR36520 regulator is an easy-to-use,

synchronous, step-down DC/DC SIMPLE SWITCHER

converter. With integrated high-side and low-side

power MOSFETs, output current up to 2 A is

delivered over a wide input voltage range of 4.2 V to

65 V. The transient tolerance that goes up to 70 V

reduces the solution size and cost to protect against

overvoltages and meets the surge immunity

requirements of IEC 61000-4-5.

The LMR36520 uses peak-current mode control to

provide optimal efficiency and output voltage

accuracy. Precision enable gives flexibility by

enabling a direct connection to the wide input voltage

or precise control over device start-up and shutdown.

The power-good flag, with built-in filtering and delay,

offers a true indication of system status, eliminating

the requirement for an external supervisor.

Integration and internal compensation eliminates

many external components and provides a pinout

designed for a simple PCB layout. The feature set of

the device is designed to simplify implementation for

a wide range of end equipment. The LMR36520 is

pin-to-pin compatible with the LMR36510 (65 V, 1 A)

and LMR33610, LMR33620, LMR33630 and

LMR33640 (36 V, 1 A/2 A/3 A/4 A), completing the

latest family of SIMPLE SWITCHER converters. This

increases the ease of use and scalability of wide Vin

converters across various commonly used voltage

and current ratings without having the need to

redesign the board layout. As a result, the overall

cost, design effort and time to market are optimized.

The LMR36520 is in an 8-pin HSOIC package.