LM62435-Q1中文资料汽车类 3V 至 36V、3.5A、低 EMI 同步降压转换器数据手册TI规格书

描述 Description

The LM62435-Q1 is an automotive-focused, high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 3.5 A of output current is delivered over a wide input range of 3.0 V to 36 V; 42 V tolerance supports load dump for durations of 400ms. The LM62435-Q1 implements soft recovery from dropout eliminating overshoot on the output.

The LM62435-Q1 is specifically designed for minimal EMI. The device incorporates pseudo-random spread spectrum, adjustable SW node rise time, low-EMI VQFN-HR package featuring low switch node ringing, and optimized pinout for ease of use. The switching frequency can be synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition the frequency can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.

Auto-mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, ensures exceptional efficiency across the entire load range.

特性 Features

• AEC-Q100 qualified for automotive applications
• Functional Safety-Capable
• Optimized for ultra low EMI requirements
• Spread spectrum reduces peak emissions
• Pin selectable FPWM mode for constant frequency at light loads
• Designed for automotive applications
• ±1% total output regulation accuracy
• High efficiency power conversion at all loads
• 83% PFM efficiency at 1-mA, 13.5 VIN, 5 VOUT
• Suitable for scalable power supplies
• LM62440-Q1 (36 V, 4 A, fixed fSW)
• LM61460-Q1 (36 V, 6 A, adjustable fSW)