LM5001_14 Datasheet, PDF (1/24 Pages) Texas Instruments – High Voltage Switch Mode Regulator

LM5001
www.ti.com
SNVS484D – JANUARY 2007 – REVISED MARCH 2009
LM5001 High Voltage Switch Mode Regulator
Check for Samples: LM5001
FEATURES
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•2 Integrated 75 Volt N-Channel MOSFET
• Ultra-Wide Input Voltage Range from 3.1V to
75V
• Integrated High Voltage Bias Regulator
• Adjustable Output Voltage
• 1.5% Output Voltage Accuracy
• Current Mode Control with Selectable
Compensation
• Wide Bandwidth Error Amplifier
• Integrated Current Sensing and Limiting
• Integrated Slope Compensation
• 85% Maximum Duty Cycle Limit
• Single Resistor Oscillator Programming
• Oscillator Synchronization Capability
• Enable / Undervoltage Lockout (UVLO) Pin
• Thermal Shutdown
DESCRIPTION
The LM5001 high voltage switch mode regulator
features all of the functions necessary to implement
efficient high voltage Boost, Flyback, SEPIC and
Forward converters, using few external components.
This easy to use regulator integrates a 75 Volt N-
Channel MOSFET with a 1 Amp peak current limit.
Current mode control provides inherently simple loop
compensation and line-voltage feed-forward for
superior rejection of input transients. The switching
frequency is set with a single resistor and is
programmable up to 1.5MHz. The oscillator can also
be synchronized to an external clock. Additional
protection features include: current limit, thermal
shutdown, under-voltage lockout and remote
shutdown capability. The device is available in both
SOIC-8 and WSON-8 packages.
Packages
• SOIC-8
• WSON-8 (4mm x 4mm)
Typical Application Circuit
+12V to +36V
+48V
VIN
EN
VCC
LM5001
SW
COMP
FB
RT
GND
Figure 1. Boost Regulator Application Schematic
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007–2009, Texas Instruments Incorporated