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MAX8840

MAX8840

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

Data Sheet
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Overview

Description

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.

MAX8840, MAX8841, MAX8842: Typical Operating Circuit MAX8840, MAX8841, MAX8842: Typical Operating Circuit Enlarge+

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

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

Parametric Specs

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
MAX8840 126
1.5
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 +85
UDFN/6
ULTRA THIN LGA/6
$0.54 @1k
MAX8841 
1.5
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
--230No
UDFN/6
MAX8842 -1.54.5230No
UDFN/6
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.

Design Resources

Quality and Environmental Data

Product Reliability Reports: MAX8840.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources


How Medical Wearables Enhance Quality of Life


CAD Symbols and Footprints

  • MAX8840ELT15+
  • MAX8840ELT15+T
  • MAX8840ELT18+
  • MAX8840ELT18+T
  • MAX8840ELT19+
  • MAX8840ELT19+T
  • MAX8840ELT25+
  • MAX8840ELT25+T
  • MAX8840ELT27+
  • MAX8840ELT27+T
  • MAX8840ELT28+
  • MAX8840ELT28+T
  • MAX8840ELT29+
  • MAX8840ELT29+T
  • MAX8840ELT30+
  • MAX8840ELT30+T
  • MAX8840ELT33+
  • MAX8840ELT33+T
  • MAX8840ELT40+
  • MAX8840ELT40+T
    •

    Quality And Environmental

    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.

    Quality Management System >
    Environmental Management System >

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