MAX8531:Dual Low-Dropout Linear Regulator with Reset or Low-Noise Output in UCSP or QFN

Industry's Smallest, Low-Dropout Linear Regulators Designed for Low-Noise, Space-Sensitive Applications

The MAX8530/MAX8531 offer the benefits of low-dropout voltage and ultra-low power regulation in subminiaturized UCSP and QFN packages with an integrated microprocessor reset circuit (MAX8530 only). The devices operate from a 2.5V to 6.5V input and deliver up to 200mA and 150mA outputs with low dropout of 100mV (typ) at 100mA. Designed with an internal P-channel MOSFET pass transistor, the supply current is kept at a low 130µA (with both LDOs on), independent of the load current and dropout voltage. Other features include short-circuit protection and thermal-shutdown protection. The MAX8530 provides microprocessor open-drain, active-low reset output to monitor OUT1, eliminating external components and adjustments. The MAX8530 asserts a 100ms (min) RESET-bar signal when OUT1 drops below 87% of the nominal output voltage. The MAX8531 includes a reference bypass pin for low output noise (40µVRMS). Both devices include a logic-controlled shutdown input and are available in 6-bump UCSP and 6-pin thin QFN exposed pad packages.

Key Features
  • Guaranteed 200mA Output Current for OUT1
  • Guaranteed 150mA Output Current for OUT2
  • Low 100mV (typ) Dropout at 100mA Load for both LDOs
  • Open-Drain, Active-Low 100ms (min) Reset Timer (MAX8530)
  • Low 40µVRMS Output Noise (MAX8531)
  • Low 130µA Operating Supply Current
  • <1µA Shutdown Current
  • Thermal-Overload and Short-Circuit Protection
  • Output Current Limit
  • Tiny Packages Available
    • 1.16 x 1.57 x 0.6mm UCSP (3 x 2 Grid)
    • 3mm x 3mm Thin QFN
MAX8530, MAX8531: Functional Diagram
MAX8530, MAX8531: Functional Diagram
Applications/Uses
  • Cell Phones/Cordless Phones
  • Digital Cameras
  • Handheld Instruments (PDAs, Palmtops)
  • Notebook Computers
  • PCMCIA Cards
  • PDAs and Palmtop Computers
  • Wireless Local Area Networks (WLANs)
DataSheet
titleDownload file
MAX8530-MAX8531 Data SheetMAX8530-MAX8531.pdf
Parametrics
Part NumberRegulatorsVIN
(V)
VIN
(V)
Preset VOUT
(V)
Special Order PresetVDROPOUT @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
minmaxtypmaxtypnomSee Notes
MAX853022.56.51.8
2.5
2.6
2.8
2.85
3
1.5 to 3.3 by 0.050.22200200220320NoNoVout-13%NoNo-40 to +85TDFN-EP/6
UCSP/6
$0.75 @1k
MAX85312.85
3
40YesTDFN-EP/6
UCSP/6
Design kits & evaluation modules
Related Products
  • MAX8512:Ultra-Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulators
  • MAX8510:Ultra-Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulators
  • MAX8511:Ultra-Low-Noise, High PSRR, Low-Dropout, 120mA Linear Regulators
  • MAX8882:Dual, Low-Noise, Low-Dropout, 160mA Linear Regulators in SOT23
  • MAX8883:Dual, Low-Noise, Low-Dropout, 160mA Linear Regulators in SOT23
  • MAX8868:Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23
  • MAX8867:Low-Noise, Low-Dropout, 150mA Linear Regulators in SOT23
  • MAX8877:Low-Noise, Low-Dropout, 150mA Linear Regulators with '2982 Pinout
  • MAX8878:Low-Noise, Low-Dropout, 150mA Linear Regulators with '2982 Pinout
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX8531EBTA8-TNo Longer AvailableUCSP,;6 pin;2 mm²-40°C to +85°CNo
MAX8531EBTGG+ActiveUCSP,;6 pin;2 mm²-40°C to +85°CLead Free
MAX8531EBTGG+TActiveUCSP,;6 pin;2 mm²-40°C to +85°CLead Free
MAX8531EBTGGJ+TNo Longer AvailableUCSP;-40°C to +85°CSee data sheet
MAX8531EBTJJ+TNo Longer AvailableUCSP,;6 pin;2 mm²-40°C to +85°CLead Free
MAX8531EBTJJ-TNo Longer AvailableMAX8531EBTJJ+TUCSP,;6 pin;2 mm²-40°C to +85°CNo
MAX8531ETTA8-TNo Longer AvailableTDFN-EP,;6 pin;9.6 mm²-40°C to +85°CNo
MAX8530-MAX8531.pdf MAX8531
功能框图 MAX8531