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LM5576 SIMPLE SWITCHER® 75V, 3A Step-Down Switching Regulator


source: | post time:2010-05-04

Part Number(s)
(NSID)
Top View Type Pins MSL Rating Peak Reflow RoHS
Status
CAD Symbols Models Package
Marking
Format
LM5576MH/NOPB
LM5576MH
TSSOP EXP PAD 20 1
1
260
260
Detail Download N/A
NSUZXYTT
LM5576
MH
LM5576MHX/NOPB
LM5576MHX
TSSOP EXP PAD 20 1
1
260
260
Detail Download N/A
NSUZXYTT
LM5576
MH
LM5576QMH/NOPB
TSSOP EXP PAD 20 1 260 Detail Download N/A
NSUZXYTT
LM5576
QMH
LM5576QMHX/NOPB
TSSOP EXP PAD 20 1 260 Detail Download N/A
NSUZXYTT
LM5576
QMH

PDFClick link to Download

Description

The LM5576 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 - 75V, the LM5576 delivers 3A of continuous output current with an integrated 170mΩ 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 50kHz to 500kHz 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 LM5576 guarantees 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 TSSOP-20 package featuring an exposed die attach pad for thermal dissipation. The LM5576 is supported by the full suite of WEBENCH On-Line design tools.

Applications

Automotive
Industrial

Features
LM5576Q is an Automotive Grade product that is AEC-Q100 grade 1 qualified (−40°C to + 125°C operating junction temperature)
Integrated 75V, 170mΩ N-channel MOSFET
Ultra-wide input voltage range from 6V to 75V
Adjustable output voltage as low as 1.225V
1.5% feedback reference accuracy
Operating frequency adjustable between 50kHz and 500kHz with single resistor
Master or slave frequency synchronization
Adjustable soft-start
Emulated current mode control architecture
Wide bandwidth error amplifier
Built-in protection
Automotive Grade product datasheet that is AEC-Q100 grade 0 qualified is available upon request.
(−40°C to + 150°C operating junction temperature)

Diagrams

Typical Application
*click for larger image


 

 

 

Block Diagram
*click for larger image


 


Typical Performance
*click for larger image


 


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Next:LM78S40 Universal Switching Regulator Subsystem


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