LM25576 4.5V to 42V, 3A Step-Down DC/DC Switching Regulator | TI.com

LM25576 (ACTIVE)

4.5V to 42V, 3A Step-Down DC/DC Switching Regulator

4.5V to 42V, 3A Step-Down DC/DC Switching Regulator - LM25576
 

Recommended alternative parts

  • LM43603  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   Synchronous 36V, 3A Regulator - Higher efficiency, Low Quiescent Current, Smaller Solution Size

Description

The LM25576 is an easy to use buck regulator which allows design engineers to design and optimize a robust power supply using a minimum set of components. Operating with an input voltage range of 6 V to 42 V, the LM25576 delivers 3 A of continuous output current with an integrated 170-mΩ N-Channel MOSFET. The regulator utilizes an Emulated Current Mode architecture which provides inherent line regulation, tight load transient response, and ease of loop compensation without the usual limitation of low-duty cycles associated with current mode regulators. The operating frequency is adjustable from 50 kHz to 1 MHz to allow optimization of size and efficiency. To reduce EMI, a frequency synchronization pin allows multiple IC’s from the LM(2)557x family to self-synchronize or to synchronize to an external clock. The LM25576 ensures robustness with cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remote shut-down. The device is available in a power enhanced HTSSOP-20 package featuring an exposed die attach pad for thermal dissipation. The LM25576 is supported by the full suite of WEBENCH® On-Line design tools.

Features

  • Integrated 42-V, 170-mΩ N-channel MOSFET
  • Ultra-Wide Input Voltage Range from 6 V to 42 V
  • Adjustable Output Voltage as Low as 1.225 V
  • 1.5% Feedback Reference Accuracy
  • Operating Frequency Adjustable Between 50 kHz and 1 MHz with Single Resistor
  • Master or Slave Frequency Synchronization
  • Adjustable Soft-Start
  • Emulated Current Mode Control Architecture
  • Wide Bandwidth Error Amplifier
  • Built-in Protection
  • HTSSOP-20EP (Exposed Pad)
  • Create a Custom Design Using the LM25576 With the WEBENCH® Power Designer

All trademarks are the property of their respective owners.

View more

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
LM25576 LM25574 LM25575
6     6     6    
42     42     42    
1.23     1.23     1.23    
40     40     40    
3     0.5     1.5    
1     1     1    
50     50     50    
1000     1000     1000    
1     1     1    
Frequency Synchronization     Frequency Synchronization     Frequency Synchronization    
Current Mode     Current Mode     Current Mode    
95     95     95    
-40 to 125     -40 to 125     -40 to 125    
Catalog     Catalog     Catalog    
HTSSOP     TSSOP     HTSSOP    

Other qualified versions of LM25576

Version Part Number Definition
Automotive LM25576-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
New!
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer LM25576

  Min   Max Range
Vin  V 6.0 to 42.0V
Vout  V -32 to 42V
Iout  A ≤ 3A
Ambient Temp  °C -40 to 125°C


Footprint BOM Cost Efficiency


Preview design