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LM3102, LM3102-Q1
SNVS515H –SEPTEMBER 2007–REVISED JUNE 2015
®
LM3102/-Q1 SIMPLE SWITCHER Synchronous 1-MHz, 2.5-A
Step-Down Voltage Regulator
1 Features
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Storage Systems
Broadband Infrastructure
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LM3102-Q1 is an Automotive-Grade Product that
is AEC-Q100 Grade 1 Qualified (–40°C to +125°C
Operating Junction Temperature)
Direct Conversion from 2-, 3-, and 4-Cell Lithium
Batteries Systems
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Low Component Count and Small Solution Size
3 Description
Stable With Ceramic and Other Low-ESR
Capacitors
The
LM3102/-Q1
SIMPLE
SWTCHER®
Synchronously Rectified Buck Converter features all
required functions to implement a highly efficient and
cost-effective buck regulator. The device can supply
2.5 A to loads with an output voltage as low as 0.8 V.
Dual N-channel synchronous MOSFET switches
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No Loop Compensation Required
High Efficiency at a Light Load by DCM Operation
Prebias Start-Up
Ultra-Fast Transient Response
Programmable Soft-Start
allow
a
low component count, thus reducing
complexity and minimizing board size.
Programmable Switching Frequency up to 1 MHz
Valley Current Limit
Different from most other COT regulators, the
LM3102/-Q1 does not rely on output capacitor ESR
for stability, and is designed to work exceptionally
well with ceramic and other very low-ESR output
Output Overvoltage Protection
Precision Internal Reference for an Adjustable
Output Voltage Down to 0.8 V
capacitors.
The
device
requires
fast load transient
no
loop
compensation, results in
a
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Thermal Shutdown
Key Specifications
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 VCC undervoltage
lockout (UVLO), output overvoltage protection,
thermal shutdown, and gate drive UVLO. The
LM3102/-Q1 is available in the thermally enhanced
HTSSOP-20 package, and LM3102 is also available
in a DSBGA low-profile chip-scale package with
reduced output current.
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Input Voltage Range 4.5 V to 42 V
2.5-A Output Current
0.8 V, ±1.5% Reference
Integrated Dual N-Channel Main and
Synchronous MOSFETs
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Thermally Enhanced HTSSOP-20 Package
2 Applications
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5-VDC, 12-VDC, 24-VDC, 12-VAC, and 24-VAC
Systems
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
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Embedded Systems and Industrial Control
Automotive Telematics and Body Electronics
Point of Load Regulators
LM3102
DSBGA (28)
3.645 mm × 2.45 mm
LM3102
LM3102-Q1
HTSSOP (20)
6.50 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Schematic
Efficiency vs Load Current (VOUT = 3.3 V)
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.
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