MAX6475

300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit


Please check latest availability status for a specific part variant.

Description

The MAX6469–MAX6484 are low-dropout linear regulators with a fully integrated microprocessor reset circuit. Each is available with preset output voltages from +1.5V to +3.3V in 100mV increments and delivers up to 300mA of load current. These devices consume only 82µA of supply current. The low supply current, low dropout voltage, and integrated reset functionality make these devices ideal for battery-powered portable equipment.

The MAX6469–MAX6484 include a reset output that indicates when the regulator output drops below standard microprocessor supply tolerances (-7.5% or -12.5% of nominal output voltage). This eliminates the need for an external microprocessor supervisor, while ensuring that supply voltages and clock oscillators have stabilized before processor activity is enabled. Push-pull and open-drain active-low reset outputs are available, with reset timeout periods of 2.5ms, 20ms, 150ms, or 1200ms (min).

The MAX6469/MAX6470/MAX6473–MAX6478/MAX6481–MAX6484 also have a shutdown feature that reduces the supply current to 0.1µA (typ). The MAX6471-MAX6474/MAX6479–MAX6482 offer a manual reset input to assert a microprocessor reset while the regulator output is within specification. The MAX6475/MAX6476/MAX6483/MAX6484 feature a remote feedback sense pin for use with an external NPN transistor for higher-current applications. The MAX6469–MAX6476 are available in 6-pin SOT23 and 8-pin TDFN packages. The MAX6477–MAX6484 are available in a 3 × 3 chip-scale package (UCSP™). All devices are specified for operation from -40°C to +85°C.
MAX6469, MAX6470, MAX6471, MAX6472, MAX6473, MAX6474, MAX6475, MAX6476, MAX6477, MAX6478, MAX6479, MAX6480, MAX6481, MAX6482, MAX6483, MAX6484: Typical Application Circuit MAX6469, MAX6470, MAX6471, MAX6472, MAX6473, MAX6474, MAX6475, MAX6476, MAX6477, MAX6478, MAX6479, MAX6480, MAX6481, MAX6482, MAX6483, MAX6484: Typical Application Circuit Enlarge+

Key Features

  • 3 x 3 UCSP, 6-Pin SOT23, and 8-Pin TDFN Packages
  • Preset +1.5V to +3.3V Output (100mV Increments)
  • SET Pin for Adjustable Output Voltage
  • 75µVRMS LDO Output Voltage Noise (MAX6477–MAX6484)
  • ±2.0% Accuracy Over Temperature
  • Guaranteed 300mA Output Current
  • Low Dropout Voltage
    • 55mV at 150mA
    • 114mV at 300mA
  • 82µA Supply Current, 0.1µA Shutdown Current
  • Input Reverse Current, Thermal and Short-Circuit Protection
  • Microprocessor Reset with Four Timeout Options
  • Push-Pull or Open-Drain Active-Low RESET
  • Manual Reset Input
  • Remote Feedback Sense

Applications/Uses

  • Bluetooth® Modules/Wireless LAN
  • CD/DVD Drives
  • Cell Phones/Cordless Phones
  • Digital Cameras
  • Handheld Instruments (PDAs, Palmtops)
  • Notebook Computers
  • PCMCIA Cards/USB Devices
Part NumberRegulatorsVIN
(V)
VIN
(V)
Preset VOUT
(V)
Adj. VOUT
(V)
Adj. VOUT
(V)
VDROPOUT @Rated ILOAD
(V)
Rated ILOAD
(mA)
Rated ILOAD
(mA)
ICC
(µA)
Output Voltage Noise
(µV RMS)
Ref. BypassLow Batt./ Pwr. Fail OutPOK/Reset Thresh.
(V)
WatchdogReverse Batt. Protect.Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxminmaxtypmaxtypnomSee Notes
MAX6469 12.55.5
1.5
1.6
1.7
1.8
1.9
2
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.85
2.9
3
3.1
3.2
3.3
--0.11300300136150NoNo
Vout-12.5%
Vout-7.5%
NoNo-40 to +85
SOT23/6
TDFN/8
$2.39 @1k
MAX6470 --
SOT23/6
TDFN/8
-
MAX6471 --
SOT23/6
TDFN/8
-
MAX6472 --
SOT23/6
TDFN/8
-
MAX6473 --
SOT23/6
TDFN/8
-
MAX6474 --
TDFN/8
-
MAX6475 1.235
TDFN/8
-
MAX6476 1.235
SOT23/6
TDFN/8
-
See All Linear Regulators (145)
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.


MAX6470EVKIT: Evaluation Kit for the MAX6469, MAX6470, MAX6471, MAX6472, MAX6473, MAX6474, MAX6475, MAX6476

Quality and Environmental Data

Request Reliability Report for: MAX6475 
Lead-Free Package Tin (Sn) Whisker Reports

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  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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