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Manufacturer Part #


MIC37100 Series 1.5 V Fixed Output 1 A Low Voltage µCap LDO Regulator - SOT-223

ECAD Model:
Mfr. Name: Microchip
Standard Pkg:
Product Variant Information section
Date Code: 2044
Product Specification Section
Technical Attributes
Attributes Table
Input Voltage-Min: 2.25V
Input Voltage-Max: 6V
Output Voltage Fixed: 1.5V
Dropout Voltage-Max: 500mV
Output Current-Max: 1A
Rated Power: 836mW
Tolerance (%): ±1%
Operating Temp Range: -40°C to +125°C
Regulator Topology: Fixed
No. of Outputs: Single
Load Regulation (%): 1%
Current - Limit: 2.5A
Line Regulation (%): 0.5%
Package Style:  SOT-223 (TO-261-4, SC-73)
Mounting Method: Surface Mount
Features & Applications

The MIC37100-1.5WS is a 1 A low-dropout, linear voltage regulator that provide low-voltage, high-current output from an extremely small package. Utilizing Micrel’s proprietary Super βeta PNP™ pass element, the MIC37100-1.5WS offers extremely low dropout (typically 280 mV at 1 A) and low ground current (typically 11 mA at 1 A).

The MIC37100-1.5WS is a fixed output regulator offered in the SOT-223 package. The MIC37100-1.5WS is ideal for PC add-in cards that need to convert from standard 5 V to 3.3 V, 3.3 V to 2.5 V or 2.5 V to 1.8 V or lower. A guaranteed maximum dropout voltage of 500 mV over all operating conditions allows the MIC37100/01/02 to provide 2.5 V from a supply as low as 3 V and 1.8 V from a supply as low as 2.3 V.

The MIC37100/01/02 is fully protected with overcurrent limiting and thermal shutdown. Fixed output voltages of 1.5 V, 1.65 V, 1.8 V, 2.5 V and 3.3 V are available on MIC37100/01 with adjustable output voltages to 1.24 V on MIC37102.

Key Features :

  • Fixed and adjustable output voltages to 1.24 V
  • µCap Regulator, 10 µF ceramic output capacitor stable
  • 280 mV typical dropout at 1 A
  • Ideal for 3.0 V to 2.5 V conversion
  • Ideal for 2.5 V to 1.8 V, 1.65 V or 1.5 V conversion
  • 1 A minimum guaranteed output current
  • 1% initial accuracy
  • Low ground current
  • Current limiting and thermal shutdown
  • Reversed-leakage protection
  • Fast transient response
  • Low-profile SOT-223 package
  • Power SO-8 package
  • S-PAK package (MIC37102 only)

Applications :

  • LDO linear regulator for PC add-in cards
  • PowerPC™ power supplies
  • High-efficiency linear power supplies
  • SMPS post regulator
  • Multimedia and PC processor supplies
  • Battery chargers
  • Low-voltage microcontrollers and digital logic
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Product Variant Information section