LM5160 LM5160 Wide Input 65V, 2A Synchronous Buck / Fly-Buck™ Converter | TI.com

LM5160 (ACTIVE)

LM5160 Wide Input 65V, 2A Synchronous Buck / Fly-Buck™ Converter

LM5160 Wide Input 65V, 2A Synchronous Buck / Fly-Buck™ Converter - LM5160
 

Recommended alternative parts

  • LM5160A  - The device has the SAME FUNCTIONALITY and PINOUT as the compared device but is NOT an exact equivalent.   The LM5160A allows external Vcc to improve efficiency.

Description

The LM516x device is a 65-V, 2-A synchronous step-down converter with integrated high-side and low-side MOSFETs. The constant ON-time control scheme requires no loop compensation and supports high step-down ratios with fast transient response. An internal feedback amplifier maintains ±1% output voltage regulation over the entire operating temperature range. The ON-time varies inversely with input voltage resulting in nearly constant switching frequency. Peak and valley current limit circuits protect against overload conditions. The undervoltage lockout (EN/UVLO) circuit provides independently adjustable input undervoltage threshold and hysteresis. The LM5160 is programmed through the FPWM pin to operate in continuous conduction mode (CCM) from no load to full load or to automatically switch to discontinuous conduction mode (DCM) at light load for higher efficiency. Forced CCM operation supports multiple output and isolated Fly-Buck applications using a coupled inductor.

The LM5160A shares the same features and pin configuration as the LM5160. An external bias supply can be connected to the VCC pin of the LM5160A in either Buck or Fly-Buck applications. This additional capability can improve efficiency at high input voltages.

Features

  • Wide 4.5-V to 65-V Input Voltage Range
  • Integrated High-Side and Low-Side Switches
    • No Schottky Diode Required
  • 2-A Maximum Load Current
  • Constant ON-Time Control
    • No External Loop Compensation
    • Fast Transient Response
  • Selectable Forced CCM or DCM Operation
  • CCM Option Supports Multi-Output Fly-Buck™
  • Nearly Constant Switching Frequency
  • Frequency Adjustable Up to 1 MHz
  • Programmable Soft-Start Time
  • Prebiased Start-Up
  • Peak Current Limiting Protection
  • Adjustable Input UVLO and Hysteresis
  • ±1% Feedback Voltage Reference
  • LM5160A Allows External VCC Bias
  • Thermal Shutdown Protection
  • Create a Custom Design Using the LM5160A With the WEBENCH® Power Designer

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Parametrics Compare all products in Buck converters (integrated switch)

 
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
LM5160 LM46000 LM46001 LM46002 LM5166 LMR16006 LMR16010 LMR16020 LMR36006 LMR36015 TPS54060A TPS54160A
4.5     3.5     3.5     3.5     3     4     4.3     4.3     4.2     4.2     3.5     3.5    
65     60     60     60     65     60     60     60     60     60     60     60    
2     1     1     1     1.23     0.8     1     1     1     1     0.8     0.8    
60     28     28     28     65     55     50     50     57     57     58     58    
2     0.5     1     2     0.5     0.6     1     2     0.6     1.5     0.5     1.5    
1     1     1     1     1     1     1     1     1     1     1     1    
50     200     200     200     50     700     200     200     1000     400     100     100    
1000     2200     2200     2200     600     2100     2500     2500     2100     1000     2500     2500    
2.3     0.024     0.024     0.027     0.01     0.028     0.04     0.04     0.023     0.023     0.116     0.116    
Enable
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Tracking    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Tracking
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Tracking    
Adjustable Current Limit
Enable
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Enable
Light Load Efficiency
Pre-Bias Start-Up
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Tracking
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Tracking
UVLO Adjustable    
Enable
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Wettable Flanks Package    
Enable
Forced Pulse Width Modulation (FPWM) Mode
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification
Wettable Flanks Package    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
UVLO Adjustable    
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Tracking
UVLO Adjustable    
Constant on-time (COT)     Current Mode