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LM3100MH View Datasheet(PDF) - Texas Instruments

Part NameDescriptionManufacturer
LM3100MH SIMPLE® SWITCHER® Synchronous 1MHz 1.5A Step-Down Voltage Regulator TI
Texas Instruments TI
LM3100MH Datasheet PDF : 21 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
LM3100
www.ti.com
SNVS421G – JANUARY 2006 – REVISED APRIL 2013
LM3100 SIMPLE SWITCHER® Synchronous 1MHz 1.5A Step-Down Voltage Regulator
Check for Samples: LM3100
FEATURES
1
2 Input Voltage Range 4.5V - 36V
• 1.5A Output Current
• 0.8V, ±1.5% Reference
• Integrated 40V, Dual N-Channel Buck
Synchronous Switches
• Low Component Count and Small Solution
Size
• No Loop Compensation Required
• Ultra-Fast Transient Response
• Stable with Ceramic and Other Low ESR
Capacitors
• Programmable Switching Frequency up to
1MHz
• Max. Duty Cycle Limited During Start-Up
• Valley Current Limit
• Precision Internal Reference for Adjustable
Output Voltage Down to 0.8V
• Thermal Shutdown
• Thermally Enhanced HTSSOP-20 Package
TYPICAL APPLICATIONS
• 5VDC, 12VDC, 24VDC, 12VAC, and 24VAC
Systems
• Embedded Systems
• Industrial Controls
• Automotive Telematics and Body Electronics
• Point of Load Regulators
• Storage Systems
• Broadband Infrastructure
• Direct Conversion from 2/3/4 Cell Lithium
Batteries Systems
DESCRIPTION
The LM3100 Synchronously Rectified Buck Converter
features all functions needed to implement a highly
efficient, cost effective buck regulator capable of
supplying 1.5A to loads with voltages as low as 0.8V.
Dual 40V N-Channel synchronous MOSFET switches
allow for low external component thus reducing
complexity and minimizing board space. The LM3100
is designed to work exceptionally well with ceramic
and other very low ESR output capacitors. The
Constant ON-Time (COT) regulation scheme requires
no loop compensation, results in fast load transient
response, and simplifies circuit implementation.
Through the use of a unique design the regulator
does not rely on output capacitor ESR for stability, as
do most other COT regulators. The operating
frequency remains nearly constant with line and load
variations due to the inverse relationship between the
input voltage and the on-time. The oprating frequency
can be externally programmed up to 1MHz.
Protection features include VCC under-voltage
lockout, thermal shutdown and gate drive under-
voltage lockout. The part is available in a thermally
enhanced HTSSOP-20 package
Typical Application
VIN
CIN
CBST
CSS
L
N/C
SW
SW
VIN
VIN
BST
GND
SS
N/C
N/C
N/C
N/C
PGND
PGND
VCC
RON
EN
FB
N/C
TST
RON
CFB
REN
RFB1
RFB2
CVCC
VOUT
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 © 2006–2013, Texas Instruments Incorporated
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