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| LM5017MRX_NOPB Datasheet, PDF (1/19 Pages) Texas Instruments – 600mA Constant On-Time Synchronous Buck Regulator | |||
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LM5017
www.ti.com
SNVS783D â JANUARY 2012 â REVISED MAY 2013
LM5017 100V, 600mA Constant On-Time Synchronous Buck Regulator
Check for Samples: LM5017
FEATURES
1
â¢2 Wide 9V to 100V Input Range
⢠Integrated 100V, High and Low Side Switches
⢠No Schottky Required
⢠Constant On-time Control
⢠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
⢠Thermal Shutdown
APPLICATIONS
⢠Smart Power Meters
⢠Telecommunication Systems
⢠Automotive Electronics
⢠Isolated Bias Supply
PACKAGES
⢠WSON-8
⢠SO PowerPAD-8
DESCRIPTION
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.
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).
The LM5017 is available in WSON-8 and SO
PowerPAD-8 plastic packages.
Typical Application
9V-100V
VIN
+
CIN
RUV2
SD
RUV1
LM5017
7
2
VIN
4 RON
RON
BST
SW 8
+
CBST
CVCC
3 UVLO
VCC 6
RTN
1
FB
5
L1
RFB2
RFB1
VOUT
RC
+
COUT
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
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.
Copyright © 2012â2013, Texas Instruments Incorporated
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