40V, 5A SIMPLE SWITCHER, 2.2MHz Step-Down Regulator with 40μA IQ - LMR14050

LMR14050 (ACTIVE)

40V, 5A SIMPLE SWITCHER, 2.2MHz Step-Down Regulator with 40μA IQ

 

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Description

The LMR14050 is a 40 V, 5 A step down regulator with an integrated high-side MOSFET. With a wide input range from 4 V to 40 V, it’s suitable for various applications from industrial to automotive for power conditioning from unregulated sources. The regulator’s quiescent current is 40 µA in Sleep-mode, which is suitable for battery powered systems. An ultra-low 1 µA current in shutdown mode can further prolong battery life. A wide adjustable switching frequency range allows either efficiency or external component size to be optimized. Internal loop compensation means that the user is free from the tedious task of loop compensation design. This also minimizes the external components of the device. A precision enable input allows simplification of regulator control and system power sequencing. The device also has built-in protection features such as cycle-by-cycle current limit, thermal sensing and shutdown due to excessive power dissipation, and output overvoltage protection.

Features

  • 4 V to 40 V Input Range
  • 5 A Continuous Output Current
  • Ultra-low 40 µA Operating Quiescent Current
  • 90 mΩ High-Side MOSFET
  • Minimum Switch-On Time: 75 ns
  • Current Mode Control
  • Adjustable Switching Frequency from 200 kHz to
    2.5 MHz
  • Frequency Synchronization to External Clock
  • Internal Compensation for Ease of Use
  • High Duty Cycle Operation Supported
  • Precision Enable Input
  • 1 µA Shutdown Current
  • External Soft-start
  • Thermal, Overvoltage and Short Protection
  • 8-Pin HSOIC with PowerPAD™ Package

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Parametrics Compare all products in Buck Converter (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
LMR14050 LM43603 LM73605 LM73606 LMR14006 LMR14020 LMR14030 LMS3655 TPS54540 TPS560430
4    3.5    3.5    3.5    4    4    4    3.5    4.5    4   
40    36    36    36    40    40    40    42    42    36   
1    1    1    1    0.8    1    1    1    0.8    1   
36    28    34    34    30    36    36    15    41.1    24   
5    3    5    6    0.6    2    3.5    5.5    5    0.6   
1    1    1    1    1    1    1    1    1    1   
200    200    350    350    1100    200    200    250    100    1100   
2500    2200    2200    2200    2100    2500    2500    500    2500    1100   
0.04    0.027    0.015    0.015    0.028    0.04    0.04    0.015    0.146    0.08   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Tracking
UVLO Adjustable   
Enable
Frequency Synchronization
Light Load Efficiency
Power Good
Synchronous Rectification
Tracking   
Enable
Forced Pulse Width Modulation (FPWM) Mode
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Fixed
Wettable Flanks Package   
Enable
Forced Pulse Width Modulation (FPWM) Mode
Frequency Synchronization
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Fixed
Wettable Flanks Package   
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
Frequency Synchronization
Light Load Efficiency
Power Good
Pre-Bias Start-Up
Synchronous Rectification   
Enable
Frequency Synchronization
Light Load Efficiency
UVLO Adjustable   
Enable
Forced Pulse Width Modulation (FPWM) Mode
Light Load Efficiency
Over Current Protection
Pre-Bias Start-Up
Synchronous Rectification
Tracking
UVLO Adjustable   
Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode    Current Mode   
98    99    96    95    97    98    98    98    98    98   
-40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125    -40 to 125   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
SO PowerPAD    HTSSOP
SON   
WQFN    WQFN    SOT-23-THIN    SO PowerPAD    SO PowerPAD    VQFN-HR    SO PowerPAD    SOT-23   

Other qualified versions of LMR14050

Version Part Number Definition
Automotive LMR14050-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
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WEBENCH® Designer LMR14050

  Min   Max Range
Vin  V 4.0 to 40.0V
Vout  V 0.75 to 38V
Iout  A ≤ 5A
Ambient Temp  °C -40 to 125°C


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