LM5163 100-V input, 0.5-A synchronous buck DC/DC converter with ultra-low IQ | TI.com

LM5163
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100-V input, 0.5-A synchronous buck DC/DC converter with ultra-low IQ

 

Description

The LM5163 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. A minimum controllable on-time of 50 ns facilitates large step-down conversion ratios, enabling the direct step-down from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5163 operates during input voltage dips as low as 6 V, at nearly 100% duty cycle if needed, making it an excellent choice for wide input supply range industrial and high cell count battery pack applications.

With integrated high-side and low-side power MOSFETs, the LM5163 delivers up to 0.5-A of output current. A constant on-time (COT) control architecture provides nearly constant switching frequency with excellent load and line transient response. Additional features of the LM5163 include ultra-low IQ and diode emulation mode operation for high light-load efficiency, innovative peak and valley overcurrent protection, integrated VCC bias supply and bootstrap diode, precision enable and input UVLO, and thermal shutdown protection with automatic recovery. An open-drain PGOOD indicator provides sequencing, fault reporting, and output voltage monitoring.

The LM5163 is available in a thermally-enhanced, 8-pin SO PowerPAD™ package. Its 1.27-mm pin pitch provides adequate spacing for high-voltage applications.

Features

  • Designed for reliable and rugged applications
    • Wide input voltage range of 6 V to 100 V
    • Junction temperature range: –40°C to +150°C
    • Fixed 3-ms internal soft-start timer
    • Peak and valley current-limit protection
    • Input UVLO and thermal shutdown protection
  • Suited for scalable Industrial power supplies and battery packs
    • Low minimum on- and off-times of 50 ns
    • Adjustable switching frequency up to 1 MHz
    • Diode emulation for high light-load efficiency
    • 10.5-µA no-load input quiescent current
    • 3-µA shutdown quiescent current
  • Ultra–low EMI emission
    • Optimized for CISPR 25 class 5 standard
  • Integration reduces solution size and cost
    • COT mode control architecture
    • Integrated 0.725-Ω NFET buck switch
    • Integrated 0.34-Ω NFET synchronous rectifier eliminates external Schottky diode
    • 1.2-V internal voltage reference
    • No loop compensation components
    • Internal VCC bias regulator and boot diode
    • Open-drain power good indicator
    • 8-Pin SOIC package with PowerPAD™
  • Create a custom regulator design using WEBENCH® power designer

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WEBENCH® Designer LM5163

  Min   Max Range
Vin  V 6.0 to 100.0V
Vout  V 1.2 to 50V
Iout  A ≤ 0.5A
Ambient Temp  °C -40 to 125°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)
LM5163 Order now 6     100     1.2     90     0.5     1     75     1000     0.0105     Enable
Light Load Efficiency
Over Current Protection
Power Good
Soft Start Fixed
Synchronous Rectification    
Constant on-time (COT)     99     -40 to 150     Catalog     SO PowerPAD | 8     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    
LM5163-Q1 Order now 6     100     1.2     90     0.5     1     75     1000     0.0105     Enable
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Soft Start Fixed
Synchronous Rectification
UVLO Adjustable
Soft Start Fixed    
Constant on-time (COT)     99     -40 to 150     Automotive     SO PowerPAD | 8     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    
LM5164 Order now 6     100     1.2     90     1     1     75     1000     0.01     Enable
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Constant on-time (COT)     99     -40 to 150     Catalog     SO PowerPAD | 8     Converter     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)