LM5017
www.ti.com
SNVS783D –JANUARY 2012–REVISED MAY 2013
LM5017 100V, 600mA Constant On-Time Synchronous Buck Regulator
Check for Samples: LM5017
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FEATURES
PACKAGES
2
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Wide 9V to 100V Input Range
Integrated 100V, High and Low Side Switches
No Schottky Required
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WSON-8
SO PowerPAD-8
DESCRIPTION
Constant On-time Control
The LM5017 is a 100V, 600mA synchronous step-
down regulator with integrated high side and low side
MOSFETs. The constant-on-time (COT) control
scheme employed in the LM5017 requires no loop
compensation, provides excellent transient response,
and enables very low step-down ratios. The on-time
varies inversely with the input voltage resulting in
nearly constant frequency over the input voltage
range. A high voltage startup regulator provides bias
power for internal operation of the IC and for
integrated gate drivers.
No Loop Compensation Required
Ultra-Fast Transient Response
Nearly Constant Operating Frequency
Intelligent Peak Current Limit
Adjustable Output Voltage from 1.225V
Precision 2% Feedback Reference
Frequency Adjustable to 1MHz
Adjustable Undervoltage Lockout (UVLO)
Remote Shutdown
A peak current limit circuit protects against overload
conditions. The undervoltage lockout (UVLO) circuit
allows the input undervoltage threshold and
hysteresis to be independently programmed. Other
protection features include thermal shutdown and
bias supply undervoltage lockout (VCC UVLO).
Thermal Shutdown
APPLICATIONS
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Smart Power Meters
Telecommunication Systems
Automotive Electronics
Isolated Bias Supply
The LM5017 is available in WSON-8 and SO
PowerPAD-8 plastic packages.
Typical Application
LM5017
9V-100V
VIN
7
BST
2
4
+
V
IN
L1
VOUT
C
BST
8
+
SW
C
IN
RON
R
UV2
C
VCC
R
ON
R
FB2
VCC
FB
3
R
C
6
5
UVLO
SD
+
R
UV1
RTN
C
OU
T
R
FB1
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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.
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