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MAX8863R, MAX8863S, MAX8863T

Low-Dropout, 120mA Linear Regulators

SOT23 Low-Noise, Low-Dropout Regulator

Product Details

The MAX8863T/S/R and MAX8864T/S/R low-dropout linear regulators operate from a +2.5V to +6.5V input range and deliver up to 120mA. A PMOS pass transistor allows the low, 80µA supply current to remain independent of load, making these devices ideal for battery-operated portable equipment such as cellular phones, cordless phones, and modems.

The devices feature Dual Mode operation: their output voltage is preset (at 3.15V for the T versions, 2.84V for the S versions, or 2.80V for the R versions) or can be adjusted with an external resistor divider. Other features include low-power shutdown, short-circuit protection, thermal shutdown protection, and reverse battery protection. The MAX8864 also includes an auto-discharge function, which actively discharges the output voltage to ground when the device is placed in shutdown mode. Both devices come in a miniature 5-pin SOT23 package.

Key Features

  • Low Cost
  • Low, 55mV Dropout Voltage at 50mA IOUT
  • Low, 68µA No-Load Supply Current
    Low, 80µA Operating Supply Current (even in dropout) 
  • Low, 350µVRMS Output Noise
  • Miniature External Components
  • Thermal Overload Protection
  • Output Current Limit
  • Reverse Battery Protection
  • Dual Mode Operation: Fixed or Adjustable (1.25V to 6.5V) Output 
  • Low-Power Shutdown

Applications/Uses

  • Cellular Telephones
  • Cordless Telephones
  • Electronic Planners
  • Hand-Held Instruments
  • Modems
  • Palmtop Computers
  • PCMCIA Cards
  • PCS Telephones
Parametric specs for Linear Regulators
VIN (V) (min) 2.5
VIN (V) (max) 5.5
Adj. VOUT (V) (min) 1.25
Adj. VOUT (V) (max) 5.5
Rated ILOAD (mA) 120
Preset VOUT (V) 2.8
2.84
3.15
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.13
ICC (µA) (max) 170
Output Voltage Noise (µV RMS) (typ) 220
Ref. Bypass No
Low Batt./ Pwr. Fail Out No
Watchdog No
Reverse Batt. Protect. Yes
Oper. Temp. (°C) -40 to +85
Package/Pins SOT23/5
Budgetary
Price (See Notes)
$0.75 @1k
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Simplified Block Diagram

MAX8863R, MAX8863S, MAX8863T, MAX8864R, MAX8864S, MAX8864T: Functional Diagram MAX8863R, MAX8863S, MAX8863T, MAX8864R, MAX8864S, MAX8864T: Functional Diagram Zoom icon

Technical Docs

Data Sheet Low-Dropout, 120mA Linear Regulators Jun 28, 2016

Design & Development

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Parameters

Parametric specs for Linear Regulators
VIN (V) (min) 2.5
VIN (V) (max) 5.5
Adj. VOUT (V) (min) 1.25
Adj. VOUT (V) (max) 5.5
Rated ILOAD (mA) 120
Preset VOUT (V) 2.8
2.84
3.15
# Regulators 1
VDROPOUT @Rated ILOAD (V) (typ) 0.13
ICC (µA) (max) 170
Output Voltage Noise (µV RMS) (typ) 220
Ref. Bypass No
Low Batt./ Pwr. Fail Out No
Watchdog No
Reverse Batt. Protect. Yes
Oper. Temp. (°C) -40 to +85
Package/Pins SOT23/5
Budgetary
Price (See Notes)
$0.75 @1k

Key Features

  • Low Cost
  • Low, 55mV Dropout Voltage at 50mA IOUT
  • Low, 68µA No-Load Supply Current
    Low, 80µA Operating Supply Current (even in dropout) 
  • Low, 350µVRMS Output Noise
  • Miniature External Components
  • Thermal Overload Protection
  • Output Current Limit
  • Reverse Battery Protection
  • Dual Mode Operation: Fixed or Adjustable (1.25V to 6.5V) Output 
  • Low-Power Shutdown

Applications/Uses

  • Cellular Telephones
  • Cordless Telephones
  • Electronic Planners
  • Hand-Held Instruments
  • Modems
  • Palmtop Computers
  • PCMCIA Cards
  • PCS Telephones

Description

The MAX8863T/S/R and MAX8864T/S/R low-dropout linear regulators operate from a +2.5V to +6.5V input range and deliver up to 120mA. A PMOS pass transistor allows the low, 80µA supply current to remain independent of load, making these devices ideal for battery-operated portable equipment such as cellular phones, cordless phones, and modems.

The devices feature Dual Mode operation: their output voltage is preset (at 3.15V for the T versions, 2.84V for the S versions, or 2.80V for the R versions) or can be adjusted with an external resistor divider. Other features include low-power shutdown, short-circuit protection, thermal shutdown protection, and reverse battery protection. The MAX8864 also includes an auto-discharge function, which actively discharges the output voltage to ground when the device is placed in shutdown mode. Both devices come in a miniature 5-pin SOT23 package.

Simplified Block Diagram

MAX8863R, MAX8863S, MAX8863T, MAX8864R, MAX8864S, MAX8864T: Functional Diagram MAX8863R, MAX8863S, MAX8863T, MAX8864R, MAX8864S, MAX8864T: Functional Diagram Zoom icon

Technical Docs

Data Sheet Low-Dropout, 120mA Linear Regulators Jun 28, 2016

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal