LM25574 42V, 0.5A Step-Down Switching Regulator | TI.com

LM25574 (ACTIVE)

42V, 0.5A Step-Down Switching Regulator

 

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Description

The LM25574 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 LM25574 delivers 0.5-A of continuous output current with an integrated 750-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 LM25574 guarantees robustness with cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remote shut-down. The device is available in a TSSOP-16 package. The LM25574 is supported by the full suite of WEBENCH® On-Line design tools.

Features

  • Integrated 42-V, 750-mΩ N-Channel MOSFET
  • Ultra-Wide Input Voltage 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
  • TSSOP-16 Package
  • Create a Custom Design Using the LM25574 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
Package size: mm2:W x L (PKG)
LM25574 LM25575 LM25576
6     6     6    
42     42     42    
1.23     1.23     1.23    
40     40     40    
0.5     1.5     3    
1     1     1    
50     50     50    
1000     1000     1000    
1     1     1    
Frequency Synchronization
Over Current Protection    
Frequency Synchronization
Over Current Protection    
Frequency Synchronization
Over Current Protection    
Current Mode     Current Mode     Current Mode    
95     95     95    
-40 to 125     -40 to 125     -40 to 125    
Catalog     Catalog     Catalog    
TSSOP | 16     HTSSOP | 16     HTSSOP | 20    
Converter     Converter     Converter    
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)    

Design tool

New!
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer LM25574

  Min   Max Range
Vin  V 6.0 to 42.0V
Vout  V -32 to 42V
Iout  A ≤ 0.5A
Ambient Temp  °C -40 to 125°C


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