LM5017_17 Datasheet, PDF (1/33 Pages) Texas Instruments – LM5017 100-V, 600-mA Constant On-Time Synchronous Buck Regulator

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LM5017
SNVS783I – JANUARY 2012 – REVISED OCTOBER 2015
LM5017 100-V, 600-mA Constant On-Time Synchronous Buck Regulator
1 Features
•1 Wide 7.5-V to 100-V Input Range
• Integrated 100-V High-Side,
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 1.225 V
• Precision 2% Feedback Reference
• Frequency Adjustable to 1 MHz
• Adjustable Undervoltage Lockout (UVLO)
• Remote Shutdown
• Thermal Shutdown
• Packages:
– WSON-8
– SO PowerPAD™-8
• Create a Custom Design Using the LM5017 with
the WEBENCH Power Designer
2 Applications
• Smart Power Meters
• Telecommunication Systems
• Automotive Electronics
• Isolated Bias Supply
3 Description
The LM5017 is a 100-V, 600-mA 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 high 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 (V_CC UVLO).
The LM5017 device is available in WSON-8 and
HSOP PowerPAD-8 plastic packages.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM5017
SO PowerPAD (8)
WSON (8)
4.89 mm × 3.90 mm
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application
7.5V-100V
VIN
+
C_IN
R_UV2
SD
R_UV1
LM5017
2 _VIN
4 _RON
R_ON
7
BST
SW ⁸
+
C_BST
C_VCC
3 _UVLO
VCC ₆
RTN
1
FB
5
L1
R_FB2
R_FB1
VOUT
R_C
+
C_OUT
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.