MAX8842:Ultra-Low-Noise, High PSRR, Low-Dropout, 150mA Linear Regulators in µDFN

Ultra-Low-Noise, Low-Dropout, 150mA Linear Regulator Requires Only 3.9mm2 Total Solution Size without Compromising Performance

The MAX8840/MAX8841/MAX8842 ultra-low-noise, low-dropout (LDO) linear regulators are designed to deliver up to 150mA continuous output current. These regulators achieve a low 120mV dropout for 120mA load current. The MAX8840 uses an advanced architecture to achieve ultra-low output voltage noise of 11µVRMS and PSRR of 54dB at 100kHz. The MAX8841 does not require a bypass capacitor, hence achieving the smallest PC board area. The MAX8842 output voltage can be adjusted with an external divider. The MAX8840/MAX8841 are preset to a variety of voltages in the 1.5V to 4.5V range. Designed with a p-channel MOSFET series pass transistor, the MAX8840/MAX8841/MAX8842 maintain very low ground current (40µA). The regulators are designed and optimized to work with low-value, low-cost ceramic capacitors. The MAX8840 requires only 1µF (typ) of output capacitance for stability with any load. When disabled, current consumption drops to below 1µA. The MAX8840/MAX8841/MAX8842 are available in a tiny 1mm x 1.5mm x 0.8mm µDFN.

Key Features
  • Space-Saving 1.0mm x 1.5mm x 0.8mm µDFN
  • 11µVRMS Output Noise at 100Hz to 100kHz Bandwidth (MAX8840)
  • 78dB PSRR at 1kHz (MAX8840)
  • 120mV Dropout at 120mA Load
  • Stable with 1µF Ceramic Capacitor for Any Load
  • Guaranteed 150mA Output
  • Only Need Input and Output Capacitors (MAX8841)
  • Output Voltages: 1.5V, 1.8V, 2.5V, 2.6V, 2.7V, 2.8V, 2.85V, 3V, 3.3V, 4.5V (MAX8840/MAX8841) and Adjustable (MAX8842)
  • Low 40µA Ground Current
  • Excellent Load/Line Transient
  • Overcurrent and Thermal Protection
MAX8840, MAX8841, MAX8842: Typical Operating Circuit
MAX8840, MAX8841, MAX8842: Typical Operating Circuit
Applications/Uses
  • Base Stations
  • Bluetooth® Portable Radios and Accessories
  • Cellular and Cordless Phones
  • Digital Cameras
  • PDA and Palmtop Computers
  • Personal Stereos
  • Portable and Battery-Powered Equipment
  • Wireless LANs
DataSheet
titleDownload file
MAX8840-MAX8842 Data SheetMAX8840-MAX8842.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 OutWatchdogReverse Batt. Protect.Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxminmaxtypmaxtypSee Notes
MAX88401261.5
1.6
1.8
1.9
2.5
2.6
2.7
2.8
2.85
2.9
3
3.1
3.3
4.5
--0.171501509011YesNoNoNo-40 to +85µDFN/6
UTLGA/6
$0.54 @1k
MAX88411.5
1.6
1.8
1.9
2.5
2.6
2.7
2.8
2.85
2.9
3
3.1
3.3
4.5
--230NoµDFN/6
MAX8842-1.54.5230NoµDFN/6
Quality and Environmental Data
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Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX8842ELT+ActiveµDFN,;6 pin;1.6 mm²-40°C to +85°CLead Free
MAX8842ELT+TActiveµDFN,;6 pin;1.6 mm²-40°C to +85°CLead Free
MAX8840-MAX8842.pdf MAX8842
MAX8840-MAX8842_cn.pdf MAX8842
MAX8842.pdf MAX8842
MAX8840-MAX8842_cn.pdf MAX8842