LM3100 Synchronous 1MHz 1.5A Step-Down Voltage Regulator | TI.com

LM3100
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Synchronous 1MHz 1.5A Step-Down Voltage Regulator

 

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Description

The LM3100 Synchronously Rectified Buck Converter features all functions needed to implement a highly efficient, cost effective buck regulator capable of supplying 1.5 A to loads with voltages as low as 0.8 V. Dual 40 V 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 operating frequency can be externally programmed up to 1 MHz. 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

Features

  • Input Voltage Range 4.5 V to 36 V
  • 1.5 A Output Current
  • 0.8 V, ±1.5% Reference
  • Integrated 40 V, 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 1 MHz
  • Max. Duty Cycle Limited During Start-Up
  • Valley Current Limit
  • Precision Internal Reference for Adjustable Output Voltage Down to 0.8 V
  • Thermal Shutdown
  • Thermally Enhanced HTSSOP-20 Package

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WEBENCH® Designer LM3100

  Min   Max Range
Vin  V 4.5 to 36.0V
Vout  V 0.8 to 7V
Iout  A ≤ 1.5A
Ambient Temp  °C -40 to 125°C

Parametrics

Compare all products in Buck converters (integrated switch) Email Download to Excel
Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Rating Package Group Type Package size: mm2:W x L (PKG)
LM3100 Order now 4.5     36     0.8     7     1.5     1     200     1000     1     Enable
Over Current Protection
Synchronous Rectification
Tracking    
COT with emulated ripple     94     -40 to 125     Catalog     HTSSOP | 20     Converter     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)    
LM3102 Order now 4.5     42     0.8     7     2.5     1     200     1000     1     Enable
Over Current Protection
Synchronous Rectification
Tracking    
COT with emulated ripple     94     -40 to 125     Catalog     DSBGA | 28
HTSSOP | 20    
Converter     See datasheet (DSBGA)
20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)    
LM3102-Q1 Order now 4.5     42     0.8     7     2.5     1     200     1000     1     Enable
Over Current Protection
Synchronous Rectification    
COT with emulated ripple     94     -40 to 125     Automotive     HTSSOP | 20     Converter     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)    
LM3103 Order now 4.5     42     0.6     7     0.75     1     200     1000     1     Enable
Pre-Bias Start-Up
Over Current Protection
Synchronous Rectification
Tracking    
COT with emulated ripple     94     -40 to 125     Catalog     HTSSOP | 16     Converter     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)