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MCP1826S-3302E/DB

1A LDO, 3.3V fixed, 250mV dropout, 120uA Iq, SOT-223-3, AEC-Q100

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Manufacturer Part：

MCP1826S-3302E/DB

Package：

SOT-223-3 (6.5 x 3.5 x 1.7 mm)

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Description

Product Overview

The MCP1826S-3302E/DB from Microchip Technology is a 1A low-dropout (LDO) voltage regulator with a fixed 3.3V output. It operates from 2.3V to 6V input with only 250 mV typical dropout at 1A, and features 120 uA typical quiescent current. The device is stable with a 1 uF ceramic output capacitor and is housed in a 3-pin SOT-223 package with AEC-Q100 qualification.

Key Specifications

Output Voltage 3.3V (fixed)
Output Current 1A
Input Voltage 2.3V – 6V
Dropout Voltage 250 mV (typ) @ 1A
Quiescent Current 120 uA (typ)
Accuracy +/-2%
Stability 1 uF ceramic output cap
Package SOT-223-3
Operating Temp -40 to 125 C
Qualification AEC-Q100

Features

  • 1A output current capability
  • Ultra-low dropout: 250 mV typical at 1A
  • Fixed 3.3V output with +/-2% accuracy
  • Low quiescent current: 120 uA typical
  • Stable with only 1 uF ceramic output capacitor
  • Short-circuit current limiting and thermal shutdown
  • AEC-Q100 qualified for automotive applications

Applications

  • Automotive electronic control units
  • Post-regulation for switching power supplies
  • Notebook computer power rails
  • Networking and interface card power
  • Portable computing devices

The MCP1826S-3302E/DB from Microchip Technology is a 1A low-dropout linear regulator providing a fixed 3.3V output from a 2.3V to 6V input. With a typical dropout voltage of just 250 mV at full 1A load and 120 uA quiescent current, it delivers efficient regulation for battery-powered and automotive applications. The device is stable with only a 1 uF ceramic output capacitor, minimizing board space and BOM cost. CMOS construction ensures low ground current. AEC-Q100 qualification enables use in automotive electronic control units. The SOT-223-3 package provides excellent thermal dissipation in a compact footprint.

The MCP1826S-3302E/DB uses a PMOS pass transistor in a linear regulator topology. The error amplifier compares a fraction of the output voltage against an internal bandgap reference, adjusting the PMOS gate voltage to maintain regulation. The low dropout voltage is achieved because the PMOS transistor does not require significant headroom between input and output. The 120 uA quiescent current powers the error amplifier, reference, and protection circuits. Short-circuit current limiting reduces output current to a safe level during fault conditions. Thermal shutdown disables the output when die temperature exceeds the threshold.

Pin Name Type Function
1 VIN Power Input supply (2.3-6V)
2 GND Ground Ground (connected to tab)
3 VOUT Output Regulated 3.3V output
Tab GND Ground Thermal pad / ground
  • Automotive ECU 3.3V power rails
  • Post-regulation after DC-DC converters
  • Notebook and palmtop computer power
  • Networking card and interface power supplies
  • Portable computing and instrumentation
Manufacturer Part Number Package Notes
Microchip MCP1826S-5002E/DB SOT-223-3 5.0V output version
TI TLV1117LV33DCYR SOT-223-4 3.3V, 1A LDO
Diodes Inc AP2114H-3.3TRG1 SOT-223-3 3.3V, 1A, low dropout
onsemi NCP1117ST33T3G SOT-223-3 3.3V, 1A LDO
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