MAX6478:300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit

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.

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
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
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
DataSheet
titleDownload file
MAX6469-MAX6484 Data SheetMAX6469-MAX6484.pdf
Parametrics
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
MAX646912.55.51.5
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
--0.11300300136150NoNoVout-12.5%
Vout-7.5%
NoNo-40 to +85SOT/6
TDFN-EP/8
$1.77 @1k
MAX6470--150SOT/6
TDFN-EP/8
$3.61 @1k
MAX6471--150SOT/6
TDFN-EP/8
$1.77 @1k
MAX6472--150SOT/6
TDFN-EP/8
$1.77 @1k
MAX6473--150SOT/6
TDFN-EP/8
$1.77 @1k
MAX6474--150SOT/6
TDFN-EP/8
$1.77 @1k
MAX64751.235150SOT/6
TDFN-EP/8
$1.77 @1k
MAX64761.235150SOT/6
TDFN-EP/8
$1.77 @1k
MAX6478--75UCSP/9$1.77 @1k
Design kits & evaluation modules
Related Products
  • MAX6349:150mA, SOT23, Low-Dropout Linear Regulators with Internal Microprocessor Reset Circuit
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6478BL15AD1-TNo Longer AvailableSee data sheet
MAX6478BL15AD2-TNo Longer AvailableSee data sheet
MAX6478BL15AD3-TNo Longer AvailableSee data sheet
MAX6478BL15AD4-TNo Longer AvailableSee data sheet
MAX6478BL15BD1-TNo Longer AvailableSee data sheet
MAX6478BL15BD2-TNo Longer AvailableSee data sheet
MAX6478BL15BD3+ActiveUCSP,;9 pin;2.5 mm²-40°C to +85°CLead Free
MAX6478BL15BD3+TActiveUCSP,;9 pin;2.5 mm²-40°C to +85°CLead Free
MAX6478BL15BD3-TNo Longer AvailableMAX6478BL15BD3+TUCSP;9 pin-40°C to +85°CSee data sheet
MAX6478BL15BD4-TNo Longer AvailableSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6478BL16AD1-TNo Longer AvailableSee data sheet
MAX6478BL16AD2-TNo Longer AvailableSee data sheet
MAX6478BL16AD3-TNo Longer AvailableSee data sheet
MAX6478BL16AD4-TNo Longer AvailableSee data sheet
MAX6478BL16BD1-TNo Longer AvailableSee data sheet
MAX6478BL16BD2-TNo Longer AvailableSee data sheet
MAX6478BL16BD3-TNo Longer AvailableSee data sheet
MAX6478BL16BD4-TNo Longer AvailableSee data sheet
MAX6478BL17AD1-TNo Longer AvailableSee data sheet
MAX6478BL17AD2-TNo Longer AvailableSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6478BL17AD3-TNo Longer AvailableSee data sheet
MAX6478BL17AD4-TNo Longer AvailableSee data sheet
MAX6478BL17BD1-TNo Longer AvailableSee data sheet
MAX6478BL17BD2-TNo Longer AvailableSee data sheet
MAX6478BL17BD3-TNo Longer AvailableSee data sheet
MAX6478BL17BD4-TNo Longer AvailableSee data sheet
MAX6478BL18AD1-TNo Longer AvailableSee data sheet
MAX6478BL18AD2-TNo Longer AvailableSee data sheet
MAX6478BL18AD3-TNo Longer Available-40°C to +85°CSee data sheet
MAX6478BL18AD4-TNo Longer AvailableSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6478BL18BD1-TNo Longer AvailableSee data sheet
MAX6478BL18BD2-TNo Longer AvailableSee data sheet
MAX6478BL18BD3-TNo Longer AvailableSee data sheet
MAX6478BL18BD4-TNo Longer AvailableSee data sheet
MAX6478BL19AD1-TNo Longer AvailableSee data sheet
MAX6478BL19AD2-TNo Longer AvailableSee data sheet
MAX6478BL19AD3-TNo Longer AvailableSee data sheet
MAX6478BL19AD4-TNo Longer AvailableSee data sheet
MAX6478BL19BD1-TNo Longer AvailableSee data sheet
MAX6478BL19BD2-TNo Longer AvailableSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX6478BL19BD3-TNo Longer AvailableSee data sheet
MAX6478BL19BD4-TNo Longer AvailableSee data sheet
MAX6478BL20AD1-TNo Longer AvailableSee data sheet
MAX6478BL20AD2-TNo Longer AvailableSee data sheet
MAX6478BL20AD3-TNo Longer AvailableSee data sheet
MAX6478BL20AD4-TNo Longer AvailableSee data sheet
MAX6478BL20BD1-TNo Longer AvailableSee data sheet
MAX6478BL20BD2-TNo Longer AvailableSee data sheet
MAX6478BL20BD3-TNo Longer AvailableSee data sheet
MAX6478BL20BD4-TNo Longer AvailableSee data sheet
MAX6469-MAX6484.pdf MAX6478
典型应用电路 MAX6484