LN10043Q_M&X SEMICONDUCTOR CO., LTD.

LN10043Q

The LN10X43Q1 is a high efficiency, compact, synchronous step-down DC-DC converter employing a constant frequency, peak current mode control architecture with internal compensation. It operates from an input voltage from 3.5V to 36V, provides an adjustable output voltage from 1V to VIN. LN10X43Q1 can deliver up to 3.0A. The nominal switching frequency is fixed on 400kHz, 1MHz or 2.1MHz, or sync to external clock. Automatic frequency foldback at light load can improve efficiency.

Description

Features

● Automotive AEC-Q100 Grade 1 Compliance

● Wide VIN Range: 3.5V to 36V

● Wide VOUT Range: 1V to VIN

● Integrated both High-Side and Low-Side Power MOSFETs with up to 3A Output Capability

● Frequency Options: 400kHz, 1MHz, 2.1MHz

● PLL Synchronization to External Clock

● High Efficiency Low Load DCM and PFM Operation

● Near 100% Duty Cycle Operation for Low Drop Out Operation

● Force PWM Option

● Accurate Peak and Valley Clamp and Protection

● Internal Compensation

● Spread Spectrum Option for Low EMI Applications

● Power Good Indicator

● Accurate VIN UVLO Protection

● Over-Temperature Shutdown and Recovery

● Operating Ambient Temperature -40˚C to 125 ˚C

● Output Short-Circuit Protection with Hiccup Mode

● Thermally Enhanced SOIC-EP8 Package (4.9mm X 3.9mm)

Description

The LN10X43Q1 is a high efficiency, compact, synchronous step-down DC-DC converter employing a constant frequency, peak current mode control architecture with internal compensation.

It operates from an input voltage from 3.5V to 36V, provides an adjustable output voltage from 1V to VIN.
LN10X43Q1 can deliver up to 3.0A. The nominal switching frequency is fixed on 400kHz, 1MHz or 2.1MHz, or sync to external clock.

Automatic frequency foldback at light load can improve efficiency.
Additional features such as FPWM option, precision enable, and internal soft start provide both flexible and easy to use solutions for a wide range of applications.

Protection features include input undervoltage lockout, thermal shutdown, cycle-by-cycle current limit, and short-circuit protection.

Recommanded part number

Full Orderable Part Number	Package	Main feature
LN10043Q1-EFR	SOIC-EP8	36V, 3A, 400K, PFM, DCDC
LN10143Q1-EFR	SOIC-EP8	36V, 3A, 400K, FPWM, DCDC
LN10543Q1-EFR	SOIC-EP8	36V, 3A, 2100K, FPWM, DCDC