LM5022_14 Datasheet, PDF (1/34 Pages) Texas Instruments – 60V Low Side Controller for Boost and SEPIC

LM5022
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SNVS480E – JANUARY 2007 – REVISED OCTOBER 2011
LM5022 60V Low Side Controller for Boost and SEPIC
Check for Samples: LM5022
FEATURES
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•2 Internal 60V Startup Regulator
• 1A Peak MOSFET Gate Driver
• V_IN Range 6V to 60V
• Duty Cycle Limit of 90%
• Programmable UVLO with Hysteresis
• Cycle-by-Cycle Current Limit
• External Synchronizable (AC-coupled)
• Single Resistor Oscillator Frequency Set
• Slope Compensation
• Adjustable Soft-start
• MSOP-10 Package
APPLICATIONS
• Boost Converter
• SEPIC Converter
DESCRIPTION
The LM5022 is a high voltage low-side N-channel MOSFET controller ideal for use in boost and SEPIC
regulators. It contains all of the features needed to implement single ended primary topologies. Output voltage
regulation is based on current-mode control, which eases the design of loop compensation while providing
inherent input voltage feed-forward. The LM5022 includes a start-up regulator that operates over a wide input
range of 6V to 60V. The PWM controller is designed for high speed capability including an oscillator frequency
range up to 2 MHz and total propagation delays less than 100 ns. Additional features include an error amplifier,
precision reference, line under-voltage lockout, cycle-by-cycle current limit, slope compensation, soft-start,
external synchronization capability and thermal shutdown. The LM5022 is available in the MSOP-10 package.
Typical Application
V_IN
L1
D1
V_O
C_IN
R_UV2
R_UV1
VIN
R_T
RT
UVLO
C_SS
SS
COMP
R1
OUT
CS
GND
VCC
FB
C2
R_S1
C_CS
C_F
C1
Q1
C_O
R_SNS
R_FB2
R_FB1
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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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