LM3102_15 Datasheet, PDF (1/30 Pages) Texas Instruments – LM3102/-Q1 SIMPLE SWITCHER® Synchronous 1-MHz, 2.5-A Step-Down Voltage Regulator

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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
•1 LM3102-Q1 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
• Prebias Start-Up
• Ultra-Fast Transient Response
• Programmable Soft-Start
• Programmable Switching Frequency up to 1 MHz
• Valley Current Limit
• Output Overvoltage Protection
• Precision Internal Reference for an Adjustable
Output Voltage Down to 0.8 V
• Thermal Shutdown
• Key Specifications
– 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
– Thermally Enhanced HTSSOP-20 Package
2 Applications
• 5-VDC, 12-VDC, 24-VDC, 12-VAC, and 24-VAC
Systems
• Embedded Systems and Industrial Control
• Automotive Telematics and Body Electronics
• Point of Load Regulators
• Storage Systems
• Broadband Infrastructure
• Direct Conversion from 2-, 3-, and 4-Cell Lithium
Batteries Systems
3 Description
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
allow a low component count, thus reducing
complexity and minimizing board size.
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
capacitors. The device 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 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
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 (V_OUT = 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.