Texas Instruments LM61460 | Demoboard LM61460EVM

Description

The LM61460-Q1 is an automotive-focused, high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 6 A of output current is delivered over a wide input range of 3.0 V to 36 V; tolerant of 42 V, easing input surge protection design. The LM61460-Q1 implements soft recovery from dropout eliminating overshoot on the output.The LM61460-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 set or 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. The LM61460-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in a 14-pin VQFN-HR package with wettable flanks. Electrical characteristics are specified over a junction temperature range of –40°C to +150°C.

Features

• AEC-Q100 qualified for automotive applications
  • Temperature grade 1: –40°C to +150°C, TJ
• Optimized for ultra low EMI requirements Meets CISPR25 class 5 standard Hotrod™ package minimizes switch node ringing Parallel input path minimizes parasitic inductance Spread spectrum reduces peak emissions Adjustable SW node rise time Designed for automotive applications
  • Supports 42 V automotive load dump
  • ±1% total output regulation accuracy
  • VOUT adjustable from 1 V to 95% of VIN
  • 0.4-V dropout with 4-A load (typical)
  • Protection features: thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, hiccup short-circuit protection
• High efficiency power conversion at all loads
  • 7-µA no load current at 13.5 VIN, 3.3 VOUT
  • 91% PFM efficiency at 1-mA, 13.5 VIN, 5 VOUT
  • External bias option for improved efficiency
• Suitable for scalable power supplies
  • Pin compatible with:
  • LM61440-Q1 (36 V, 4 A, Adjustable fSW)
  • LM62440-Q1 (36 V, 4 A, Fixed fSW)

More information

• Datasheet
• IC product information