LM25574-Q1 42V, 0.5A Step-Down Switching Regulator | TI.com

LM25574-Q1
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42V, 0.5A Step-Down Switching Regulator

 

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Description

The LM25574-Q1 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-Q1 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-Q1 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.

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
  • 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-Q1 With the WEBENCH® Power Designer

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WEBENCH® Designer LM25574-Q1

Topology Option
  Min   Max Range
Vin  V 6 to 42V
Vout  V 1.225 to 42V
Iout  A 0 to 0.5A
Ambient Temp  °C -40 to 125°C

Parametrics

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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)
LM25574-Q1 Order now 6     42     1.23     40     0.5     1     50     1000     1     Frequency Synchronization
Over Current Protection    
Current Mode     95     -40 to 125     Automotive     TSSOP | 16     Converter     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)    
LM25575-Q1 Samples not available 6     42     1.23     40     1.5     1     50     1000     1     Frequency Synchronization
Over Current Protection    
Current Mode     95     -40 to 125     Automotive     HTSSOP | 16     Converter     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)    
LM25576-Q1 Samples not available 6     42     1.23     40     3     1     50     1000     1     Frequency Synchronization
Over Current Protection    
Current Mode     95     -40 to 125     Automotive     HTSSOP | 20     Converter     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)    
LM5574-Q1 Order now 6     75     1.23     70     0.5     1     50     500     1     Enable
Frequency Synchronization
Over Current Protection    
Current Mode     95     -40 to 125     Automotive     TSSOP | 16     Converter     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)