LM5015_14 Datasheet, PDF (1/28 Pages) Texas Instruments – High Voltage Monolithic Two-Switch Forward DC-DC Regulator

LM5015
www.ti.com
SNVS538B – NOVEMBER 2007 – REVISED JANUARY 2009
LM5015 High Voltage Monolithic Two-Switch Forward DC-DC Regulator
Check for Samples: LM5015
FEATURES
1
•2 Dual Integrated 75V N-Channel MOSFETs
• Ultra-Wide Input Voltage Range: 4.25V to 75V
• Integrated High Voltage Bias Regulator
• Adjustable Output Voltage
• 1.5% Feedback Reference Accuracy
• Current Mode Control with Selectable
Compensation
• Wide Bandwidth Error Amplifier
• Integrated Current Sensing and Limiting
• 50% Maximum Duty Cycle Limit
• Single Resistor Oscillator Programming
• Oscillator Synchronization Capability
• Programmable Soft-Start
• Enable / Under-Voltage Lockout (UVLO) Pin
• Thermal Shutdown
PACKAGE
• HTSSOP-14EP (Exposed Pad)
DESCRIPTION
The LM5015 high voltage switch mode regulator
features all the functions necessary to implement
efficient high voltage Two-Switch Forward and Two-
Switch Flyback regulators, using a minimum of
external components. This easy to use regulator
integrates high side and low side 75 Volt N-Channel
MOSFETs with a minimum 1 Amp peak current limit.
The voltage across the MOSFETs employed in the
two-switch topology is clamped to the input voltage,
allowing the input voltage range to approach the
rating of the MOSFETs. The regulator control method
is based on current mode control providing inherent
ease of loop compensation and line feed-forward for
superior rejection of input transients.
The operating frequency is set with a single resistor
and is programmable up to 750 kHz. The oscillator
can also be synchronized to an external clock.
Additional protection features include cycle-by-cycle
current limiting, thermal shutdown, under-voltage
lockout and remote shutdown capability. The device
is available in the HTSSOP-14EP package featuring
an exposed die attach pad to enhance thermal
dissipation.
Typical Application Schematic
Input
(4.25V - 75V)
VIN
PVIN
EN
HO
LM5015
VCC
BST
RT
LO
COMP
SS
FB
GND
PGND
ISOLATED
FEEDBACK
Isolated
Output
1
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2
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.
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