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LM3102MHX/NOPB
SIMPLE SWITCHER庐 Synchronous 1MHz 2.5A Step-Down Voltage Regulator
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LM3102SNVS515I –SEPTEMBER 2007–REVISED JANUARY 2018
LM3102 Synchronous 1-MHz, 2.5-A Step-Down Voltage Regulator Features Low Component Count and Small Solution Size Stable With Ceramic and Other Low-ESR
Capacitors No Loop Compensation Required High Efficiencyata Light Loadby DCM Operation Prebias Start-Up Ultra-Fast Transient Response Programmable Soft-Start Programmable Switching Frequencyupto1 MHz Valley Current Limit Output Overvoltage Protection Precision Internal Reference foran Adjustable
Output Voltage Downto 0.8V Thermal Shutdown Key Specifications Input Voltage Range 4.5Vto42V 2.5-A Output Current 0.8V, ±1.5% Reference Integrated Dual N-Channel Main and
Synchronous MOSFETs Thermally Enhanced HTSSOP-20 Package
Applications 5-VDC, 12-VDC, 24-VDC, 12-VAC, and 24-VAC
Systems Embedded Systems and Industrial Control Automotive Telematics and Body Electronics Pointof Load Regulators Storage Systems Broadband Infrastructure Direct Conversion from 2-,3-, and 4-Cell Lithium
Batteries Systems
DescriptionThe LM3102 Synchronously Rectified Buck Converter
featuresall required functionsto implementa highly
efficient and cost-effective buck regulator. The device
can supply 2.5Ato loads with an output voltage as
lowas 0.8V. Dual N-channel synchronous MOSFET
switches allowa 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, andis designedto 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 dueto the inverse relationship between the
input voltage and the ON-time. The operating
frequency can be externally programmed up to MHz. Protection features include VCC undervoltage
lockout (UVLO), output overvoltage protection,
thermal shutdown, and gate drive UVLO. The
LM3102 is available in the thermally enhanced
HTSSOP-20 package, and LM3102is also availablea DSBGA low-profile chip-scale package with
reduced output current.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Typical Application Schematic Efficiencyvs Load Current (VOUT= 3.3V)
