LM3102_14 Datasheet, PDF (1/24 Pages) Texas Instruments – SIMPLE SWITCHER Synchronous 1MHz 2.5A Step-Down Voltage Regulator

LM3102
www.ti.com
SNVS515G – SEPTEMBER 2007 – REVISED JANUARY 2012
LM3102/LM3102Q SIMPLE SWITCHER Synchronous 1MHz 2.5A
Step-Down Voltage Regulator
Check for Samples: LM3102
FEATURES
1
•2 LM3102Q is an automotive grade product that
is AEC-Q100 grade 1 qualified (-40°C to +125°C
operating junction temperature)
• Low component count and small solution size
• Stable with ceramic and other low ESR
capacitors
• No loop compensation required
• High efficiency at a light load by DCM
operation
• Pre-bias startup
• Ultra-fast transient response
• Programmable soft-start
• Programmable switching frequency up to 1
MHz
• Valley current limit
• Output over-voltage protection
• Precision internal reference for an adjustable
output voltage down to 0.8V
• Thermal shutdown
TYPICAL APPLICATIONS
• 5VDC, 12VDC, 24VDC, 12VAC, and 24VAC
systems
• Embedded Systems
• Industrial Control
• 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 LM3102 Synchronously Rectified Buck Converter features all required functions to implement a highly
efficient and cost effective buck regulator. It is capable of supplying 2.5A to loads with an output voltage as low
as 0.8V. Dual N-Channel synchronous MOSFET switches allow a low component count, thus reducing
complexity and minimizing board size.
Different from most other COT regulators, the LM3102 does not rely on output capacitor ESR for stability, and is
designed to work exceptionally well with ceramic and other very low ESR output capacitors. It requires no loop
compensation, results in a fast load transient response and simple circuit implementation. The operating
frequency remains nearly constant with line variations due to the inverse relationship between the input voltage
and the on-time. The operating frequency can be externally programmed up to 1 MHz. Protection features
include V_CC under-voltage lock-out, output over-voltage protection, thermal shutdown, and gate drive under-
voltage lock-out. The LM3102 is available in the thermally enhanced eTSSOP-20 package as well as a uSMD
low profile chip-scale package with reduced output current.
Table 1. Key Specifications
Input voltage range 4.5V-42V
2.5A output current
0.8V, ±1.5% reference
Integrated dual N-Channel main and synchronous MOSFETs
Thermally enhanced eTSSOP-20 package
VALUE
UNIT
1
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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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