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MAX8873, MAX8873R, MAX8873S, MAX8873T, MAX8874, MAX8874R, MAX8874S, MAX8874T

Low-Dropout 120mA Linear Regulators

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Description

The MAX8873T/S/R and MAX8874T/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, 82µA supply current to remain independent of load, making these devices ideal for battery-operated portable equipment such as cellular phones and cordless phones.
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. Total error on the output is ±3.5%. Output voltages are set on the low side of popular ranges so that power drain is minimized for longer battery life. Other features include low-power shutdown, short-circuit protection, thermal shutdown protection, and reverse battery protection. The MAX8874 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.
For dual versions, refer to the MAX8865/MAX8866 data sheet. For low-noise versions with 30µVRMS output noise, refer to the MAX8877/MAX8878.

Data Sheet

Download this datasheet in PDF formatDownload Rev 2 (PDF, 373.6kB)
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Key Features

  • LP2980 Pin-Compatible SOT23 Package
  • Low, 55mV Dropout Voltage at 50mA IOUT (130mV at 120mA)
  • Low, 73µA No-Load Supply Current
  • Low, 82µA Operating Supply Current (even in dropout)
  • 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

  • Audio Systems
  • Cordless Phones
  • Electronic Planners
  • Handheld Instruments (PDAs, Palmtops)
  • Modems
  • Palmtop Computers
  • PCMCIA Cards
  • PCS Telephones
   

Key Specifications:

Linear Regulators
Part Number Regulators VIN
(V)
VIN
(V)
Preset VOUT
(V)
VDROPOUT @Rated ILOAD
(V)
Rated ILOAD
(mA)
ICC
(µA)
Output Voltage Noise
(µV RMS)
Ref. Bypass Low Batt./ Pwr. Fail Out Watchdog Reverse Batt. Protect. Oper. Temp.
(°C)
Budgetary
Price
min max typ max typ See Notes
MAX8873  1 2.5 6.5
2.8
2.84
3.15
0.13 120 150 220 No No No Yes -40 to +85 $0.71 @1k
MAX8874 
See All Linear Regulators (149)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.



Diagram

MAX8873R, MAX8873S, MAX8873T, MAX8874R, MAX8874S, MAX8874T: Typical Operating Circuit
Typical Operating Circuit

Notes and Comments

Low-Dropout, Reverse Battery Protection (MAX8873)
Low-Dropout, Reverse Battery Protection, Auto-Discharge function (MAX8874)

More Information

Topmark Coding MAX8873
Topmark Coding MAX8874

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Document Ref.: 19-1257 Rev 2; 2013-04-23
This page last modified: 2013-06-27