LM5574-Q1 75V, 0.5A Step-Down Switching Regulator | TI.com

LM5574-Q1
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
75V, 0.5A Step-Down Switching Regulator

 

Description

The LM5574-Q1 is an easy to use SIMPLE SWITCHER® 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 - 75 V, the LM5574-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 500 kHz to allow optimization of size and efficiency. To reduce EMI, a frequency synchronization pin allows multiple ICs from the LM(2)557x family to self-synchronize or to synchronize to an external clock. The LM5574-Q1 ensures 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 LM5574-Q1 is supported by the full suite of WEBENCH On-Line design tools.

Features

  • LM5574-Q1 is an Automotive Grade Product That
    is AEC-Q100 Grade Qualified
  • −40°C to + 150°C Operating Junction
    Temperature
  • Integrated 75 V, 750 mΩ N-Channel MOSFET
  • Ultra-Wide Input Voltage Range From 6 V to 75 V
  • Adjustable Output Voltage as Low as 1.225 V
  • 1.65% Feedback Reference Accuracy
  • Operating Frequency Adjustable Between 50 kHz and
    500 kHz With Single Resistor
  • Master or Slave Frequency Synchronization
  • Adjustable Soft-Start
  • Emulated Current Mode Control Architecture
  • Wide Bandwidth Error Amplifier
  • Built-In Protection
  • Package:
    • TSSOP-16

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

WEBENCH® Designer LM5574-Q1

Topology Option
  Min   Max Range
Vin  V 7 to 42V
Vout  V 1.225 to 30V
Iout  A 0 to 2.5A
Ambient Temp  °C -40 to 125°C

Parametrics

Compare all products in Buck converters (integrated switch) Email Download to Excel
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)
LM5574-Q1 Order now 6     75     1.23     70     0.5     1     50     500     1     Enable
Frequency Synchronization
Over Current Protection
Soft Start Adjustable    
Current Mode     95     -40 to 125     Automotive     TSSOP | 16     Converter     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)    
LM25574-Q1 Samples not available 6     42     1.23     40     0.5     1     50     1000     1     Frequency Synchronization
Over Current Protection
Soft Start Adjustable    
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
Soft Start Adjustable    
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
Soft Start Adjustable    
Current Mode     95     -40 to 125     Automotive     HTSSOP | 20     Converter     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)    
LM5163-Q1 Order now 6     100     1.2     90     0.5     1     75     1000     0.0105     Enable
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Soft Start Fixed
Synchronous Rectification
UVLO Adjustable
Soft Start Fixed    
Constant on-time (COT)     99     -40 to 150     Automotive     SO PowerPAD | 8     Converter