LM61460-Q1 Automotive 3-V to 36-V, 6-A, low-noise synchronous step-down converter | TI.com

LM61460-Q1
This product is prototype/experimental and has not been released to the market. Testing and final processes may not be complete. This product may be subject to further changes or possible discontinuation.
Automotive 3-V to 36-V, 6-A, low-noise synchronous step-down converter

 

Sample availability

Preproduction samples are available (PLM61460AASQRJRTQ1). Request now

Description

The LM61460-Q1 is an automotive-focused high-performance synchronous step-down buck converter providing adjustable output voltage and 0 to 6 A DC load current from a supply voltage ranging from 3.0 V to 36 V. The LM61460-Q1 is designed from ground up for minimal EMI. The device incorporates pseudo-random spread spectrum, adjustable SW node rise time, and low-EMI VQFN-HR package featuring low ringing and optimal-layout-friendly pinout. Switching frequency can be set or synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands, and for improved efficiency at low operating frequency or smaller solution size at high frequency. Factory auto-mode enables frequency foldback when operating with light loads, allowing an unloaded current consumption of only 7 µA (typical) and high efficiency with light loads. Together with very low MOSFET ON resistances and optional external bias input, exceptional efficiency is achieved over entire load range. The device also provides an open-drain PGood output and comprehensive protection features. Electrical characteristics are specified over a junction temperature range of –40°C to +150°C.

Features

  • AEC-Q100 qualified for automotive applications
    • Device temperature grade 1, TA range –40°C to +125°C , and TJ range –40°C to +150°C
  • Low EMI
    • Adjustable SW node rise time
    • Spread spectrum to reduce peak emissions
    • Frequency adjust or synchronize over 200 kHz – 2.2 MHz range
    • FPWM when synchronized for constant frequency at light loads
    • 4 mm × 3.5 mm low-EMI VQFN-HR package (with wettable flanks) and pinout
  • High efficiency power conversion at all loads
    • 7-µA standby current with VIN = 13.5 V, VOUT = 3.3 V, no load
    • Frequency foldback in light load for improved efficiency with auto mode
    • Low MOSFET ON resistance
      RDS_ON_HS = 41 mΩ (typical)
      RDS_ON_LS = 21 mΩ (typical)
    • Optional external bias input
  • Wide conversion range
    • Input voltage: 3 V to 36 V
    • Output voltage adjustable from 1 V to 95% of VIN
    • DC load current: 0 A to 6 A
    • tON_MIN = 50 ns (typical)
    • tOFF_MIN = 70 ns (typical)
  • PGood output with filter and delayed release
  • Built-in compensation, soft start, current limits, hiccup protection, thermal shutdown, and UVLO

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WEBENCH® Designer LM61460-Q1

  Min   Max Range
Vin  V 3.0 to 36.0V
Vout  V 2.85 to 34.2V
Iout  A ≤ 6A
Ambient Temp  °C -40 to 150°C

Parametrics

Compare all products in Buck converters (integrated switch) Email Download to Excel
Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Package size: mm2:W x L (PKG)
LM61460-Q1 Order now 3     36     1     34     6     1     200     2200     0.008     Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Soft Start Fixed
Spread Spectrum
Synchronous Rectification
Wettable Flanks Package    
Current Mode     98     -40 to 150     Automotive     VQFN-HR | 14     Converter     14VQFN-HR: 14 mm2: 3.5 x 4 (VQFN-HR | 14)    
LM61440-Q1 Samples not available 3     36     1     34     4     1     200     2200     0.008     Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Soft Start Fixed
Spread Spectrum
Synchronous Rectification
Wettable Flanks Package    
Current Mode     98     -40 to 150     Automotive     VQFN-HR | 14     Converter     14VQFN-HR: 14 mm2: 3.5 x 4 (VQFN-HR | 14)    
LM62440-Q1 Samples not available 3     36     1     34     4     1     2200     2200     0.008     Enable
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Soft Start Fixed
Spread Spectrum
Synchronous Rectification
Wettable Flanks Package    
Current Mode     98     -40 to 150     Automotive     VQFN-HR | 14     Converter     14VQFN-HR: 14 mm2: 3.5 x 4 (VQFN-HR | 14)    
LM73605-Q1 Order now 3.5     36     1     34     5     1     350     2200     0.015     Enable
Forced PWM
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
Wettable Flanks Package    
Current Mode     96     -40 to 125     Automotive     WQFN | 30     Converter     30WQFN: 24 mm2: 4 x 6 (WQFN | 30)    
LM73606-Q1 Order now 3.5     36     1     34     6     1     350     2200     0.015     Enable
Forced PWM
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Tracking
UVLO Fixed
Wettable Flanks Package
Soft Start Adjustable    
Current Mode     96     -40 to 125     Automotive     WQFN | 30     Converter