LM5575-Q1 75V, 1.5A Step-Down Switching Regulator | TI.com

LM5575-Q1 (ACTIVE)

75V, 1.5A Step-Down Switching Regulator



The LM5575-Q1 is an easy-to-use buck regulator that 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 75 V, the LM5575-Q1 delivers 1.5 A of continuous output current with an integrated 330-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 devices to self-synchronize or to synchronize to an external clock. The LM5575-Q1 ensures robustness with cycle-by-cycle current limit, short-circuit protection, thermal shutdown, and remote shutdown. The device is available in a power enhanced 16-pin HTSSOP package featuring an exposed die attach pad for thermal dissipation. The LM5575-Q1 is supported by the full suite of WEBENCH® On-Line design tools.


  • AEC-Q100 Qualified for Automotive Applications:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
    • Device HBM ESD Classification Level 2
  • -40°C to 150°C Operating Junction Temperature
  • Integrated 75-V, 330-mΩ N-Channel MOSFET
  • Ultra-Wide Input-Voltage 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
  • Create a Custom Design Using the LM5575-Q1 With the WEBENCH® Power Designer

All trademarks are the property of their respective owners.

View more

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)
Control mode
Duty cycle (Max) (%)
Operating temperature range (C)
Package Group
Package size: mm2:W x L (PKG)
LM5575-Q1 LM5010A-Q1 LM5161-Q1 LM5164-Q1
6     6     4.5     6    
75     75     100     100    
1.23     2.5     2     1.2    
70     70     92     90    
1.5     1     1     1    
1     1     1     1    
50     50     50     75    
500     1000     1000     1000    
1     0.65     2.3     0.01    
Frequency Synchronization
Over Current Protection    
Over Current Protection    
Forced PWM
Light Load Efficiency
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Light Load Efficiency
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification
UVLO Adjustable    
Current Mode     Constant on-time (COT)     COT with emulated ripple
Constant on-time (COT)    
Constant on-time (COT)    
95     99     92     99    
-40 to 125     -40 to 125
-40 to 150    
-40 to 125     -40 to 150    
Automotive     Automotive     Automotive     Automotive    
HTSSOP | 16     HTSSOP | 14     HTSSOP | 14     SO PowerPAD | 8    
Converter     Converter     Converter     Converter    
16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)     14HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 14)     14HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 14)     8SO PowerPAD: 19 mm2: 3.9 x 4.89 (SO PowerPAD | 8)    

Design tool

WEBENCH® Designer LM5575-Q1

Product Option
  Min   Max Range
Vin  V 6.0 to 75.0V
Vout  V 1.225 to 75V
Iout  A 1.50A
Ambient Temp  °C -40 to 125°C