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AC/DC & DC/DC converters (integrated FET)

LM61440

現行

3V 至 36V、4A、低雜訊同步降壓轉換器

立即訂購
產品規格表

LM61440

現行
產品規格表 立即訂購

產品詳細資料

Iout (max) (A) 4 Vin (min) (V) 3 Vin (max) (V) 36 Topology Buck Type Converter Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Synchronous Rectification, Wettable flanks package Control mode current mode Vout (min) (V) 1 Vout (max) (V) 34 Rating Catalog Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000007
Iout (max) (A) 4 Vin (min) (V) 3 Vin (max) (V) 36 Topology Buck Type Converter Switching frequency (min) (kHz) 200 Switching frequency (max) (kHz) 2200 Features Enable, Frequency synchronization, Light Load Efficiency, Over Current Protection, Power good, Soft Start Fixed, Synchronous Rectification, Wettable flanks package Control mode current mode Vout (min) (V) 1 Vout (max) (V) 34 Rating Catalog Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.000007
VQFN-HR (RJR) 14 14 mm² 4 x 3.5
  • Functional Safety-Capable
  • Optimized for ultra low EMI requirements
    • Hotrod™ package and parallel input path minimize switch node ringing
    • Parallel input path minimizes parasitic inductance
    • Adjustable SW node rise time
  • Designed for reliable and rugged applications
    • Supports 42-V transients
    • ±1% total output regulation accuracy
    • VOUT adjustable from 1 V to 95% of VIN
    • 0.3-V dropout with 3-A load (typical)
  • High efficiency power conversion at all loads
    • 7-µA no load current at 13.5 VIN, 3.3 VOUT
    • 83% PFM efficiency at 1-mA, 13.5 VIN, 5 VOUT
    • Low MOSFET ON resistance
      • RDS_ON_HS = 41 mΩ (typical)
      • RDS_ON_LS = 21 mΩ (typical)
    • External bias option for improved efficiency
  • Suitable for scalable power supplies
    • Pin compatible with:
  • Functional Safety-Capable
  • Optimized for ultra low EMI requirements
    • Hotrod™ package and parallel input path minimize switch node ringing
    • Parallel input path minimizes parasitic inductance
    • Adjustable SW node rise time
  • Designed for reliable and rugged applications
    • Supports 42-V transients
    • ±1% total output regulation accuracy
    • VOUT adjustable from 1 V to 95% of VIN
    • 0.3-V dropout with 3-A load (typical)
  • High efficiency power conversion at all loads
    • 7-µA no load current at 13.5 VIN, 3.3 VOUT
    • 83% PFM efficiency at 1-mA, 13.5 VIN, 5 VOUT
    • Low MOSFET ON resistance
      • RDS_ON_HS = 41 mΩ (typical)
      • RDS_ON_LS = 21 mΩ (typical)
    • External bias option for improved efficiency
  • Suitable for scalable power supplies
    • Pin compatible with:

The LM61440 is a high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 4 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 LM61440 implements soft recovery from dropout eliminating overshoot on the output.

The LM61440 is specifically designed for minimal EMI. The device incorporates 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.

Electrical characteristics are specified over a junction temperature range of –40°C to +150°C. Find additional resources in the Related Documentation.

The LM61440 is a high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 4 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 LM61440 implements soft recovery from dropout eliminating overshoot on the output.

The LM61440 is specifically designed for minimal EMI. The device incorporates 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.

Electrical characteristics are specified over a junction temperature range of –40°C to +150°C. Find additional resources in the Related Documentation.
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類型 標題 日期
* Data sheet LM61440 3-V to 36-V, 4-A, Low EMI Synchronous Step-Down Converter datasheet (Rev. C) PDF | HTML 2021年 6月 22日
EVM User's guide LM61460-Q1 EVM User's Guide (Rev. D) PDF | HTML 2021年 7月 30日
Selection guide Buck Converter Quick Reference Guide (Rev. B) 2021年 4月 8日
Functional safety information LM61x0 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML 2020年 10月 8日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LM61460EVM — 36-V、低 EMI 6-A、5-V 同步、400-kHz、降壓轉換器評估模組

The LM61460 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM61460 synchronous step-down converter.  The LM61460 provides exceptional efficiency, low IQ, and low EMI in small solution size.
使用指南: PDF | HTML
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模擬型號

LM61440AAN PSpice Transient Model

SNVMBY8.ZIP (142 KB) - PSpice Model
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計算工具

SNVR479 — LM61460 Design Tool

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產品
AC/DC & DC/DC converters (integrated FET)
LM61440 — 3V 至 36V、4A、低雜訊同步降壓轉換器 LM61460 — 3-V 至 36-V、6-A、低 EMI 同步降壓轉換器 LM61460-Q1 — 車用 3V 至 36V、6A、低雜訊同步降壓轉換器
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LM61460 EVM Design Files

SNVR478.ZIP (5000 KB)
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VQFN-HR (RJR) 14 檢視選項
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