Firmenblog über LM5169 Automotive Chip: 6V–120V Wide Input Voltage, 650mA DC/DC Converter — Mingjiada Electronics, in stock in Shenzhen

Shenzhen Mingjiada Electronics Co., Ltd. – Genuine stock available: (TI) LM5169 6V–120V wide input voltage, 650mA DC/DC converter

Product Overview

The LM5169 is a high-performance synchronous step-down DC/DC converter from Texas Instruments (TI), featuring an ultra-wide input voltage range of 6V to 120V, a 650mA output current capability, and support for Fly-Buck™ functionality. Designed specifically for demanding industrial, automotive and communications applications, this device delivers efficient and stable power conversion across a wide input voltage range, minimising the need for external surge suppression components.

Key Features

Ultra-wide input voltage range

The LM5169 supports a wide input voltage range of 6 V to 120 V (absolute maximum) with a junction temperature range of –40 °C to +150 °C. Even in extreme conditions where the input voltage drops to 6 V, the device continues to operate normally at a duty cycle close to 100 per cent.

High Output Current and Integrated MOSFETs

The chip incorporates integrated high-side and low-side power MOSFETs (1.9 Ω N-FET buck switch + 0.71 Ω N-FET synchronous rectifier), capable of delivering an output current of up to 0.65 A. This integrated design significantly reduces the solution size and overall cost.

Advanced COT Control Architecture

The Constant On-Time (COT) control architecture, combined with input voltage feedforward technology, delivers a virtually constant switching frequency and excellent load and line transient response. A minimum controllable on-time of 50 ns supports extremely high step-down conversion ratios, enabling direct conversion from a 48 V nominal input to a low-voltage rail.

Flexible Switching Frequency and Operating Modes

Adjustable switching frequency up to 1 MHz

FPWM mode: Forced Continuous Conduction Mode (CCM), supporting isolated fly-buck converter applications

Auto mode: Ultra-low quiescent current (<10 μA) + diode emulation, delivering high light-load efficiency

Shutdown quiescent current of just 3 μA

Comprehensive Protection Features

Peak and valley current limit protection

Input under-voltage lockout (UVLO)

Thermal shutdown protection

Fixed 3 ms internal soft-start timer

Open-drain power-good indicator

Pin Compatibility and Scalability

The LM5169 is pin-compatible with devices such as the LM5164, LM5163, LM5017 and LM34927, facilitating design upgrades and platform expansion.

Technical Specifications

Input voltage range: 6 V – 120 V (absolute maximum)

Output current: up to 650 mA

Switching frequency: adjustable, up to 1 MHz

Minimum on/off time: 50 ns

Quiescent current (auto mode): <10 μA

Off-state quiescent current: 3 μA

Junction temperature range: –40 °C to +150 °C

Package Options: SOIC PowerPAD™-8 / WSON-8

Synchronous Rectification: Yes

Control Architecture: COT (Constant On-Time)

Typical Applications

Thanks to its ultra-wide input voltage range and highly reliable design, the LM5169 is widely used in the following applications:

Communications equipment – brick-type power modules

Industrial battery packs (≥10 cells in series) – electric bicycles, electric scooters, light electric vehicles

Automotive electronics — the AEC-Q100-compliant LM5169-Q1 version is suitable for HEV/EV power systems

Industrial automation — industrial control equipment requiring a wide input voltage range

High-reliability power supply applications such as AI humanoid robots, drones, the Internet of Things (IoT), rail transport and instrumentation

Automotive-grade version: LM5169-Q1

For automotive applications, TI also offers the LM5169-Q1 series; this device complies with the AEC-Q100 automotive standard, Temperature Grade 1 (ambient temperature range –40°C to +125°C). The LM5169-Q1 also features a wide input voltage range of 6 V to 120 V, an output current of 650 mA and Fly-Buck™ functionality, making it an ideal choice for automotive power management.

Why choose Mingjiada Electronics?

Established in 1996, Shenzhen Mingjiada Electronics Co., Ltd. is a globally renowned authorised independent distributor of electronic components. By choosing Mingjiada Electronics as your supplier for the LM5169, you will benefit from:

✅ Genuine factory products – 100% genuine, reliable quality

✅ Extensive stock on hand — Stocked in Shenzhen, with ultra-short lead times (one to three days)

✅ One-stop order fulfilment service — Covering a wide range of product categories including ICs, power devices and connectors

✅ Stable supply capability — Small-batch orders available, with support for long-term supply

Contact Us

Address: Rooms 1239–1241, New Asia Guoli Building, Zhenzhong Road, Futian District, Shenzhen, Guangdong Province

Tel: 86-755-83294757 / 13410018555

Email: sales@hkmjd.com

Website: www.integrated-ic.com

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