MAX8840, MAX8841, MAX8842 Ultra-Low-Noise, High PSRR, Low-Dropout, 150mA Linear Regulators in µDFN

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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 11µV_RMS 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

Applications/Uses

Space-Saving 1.0mm x 1.5mm x 0.8mm µDFN
11µV_RMS 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

	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

Key Specifications: Linear Regulators

Part Number

Regulators per Pkg.

Min. V_IN (V)

Max. V_IN (V)

Preset V_OUT (V)

Min. Adjustable V_OUT (V)

Max. Adjustable V_OUT (V)

Typ. V_DROPOUT@ Rated I_LOAD (V)

Rated I_LOAD (mA)

Max. I_CC (µA)

Low Battery/ Power Fail Output

POK/ Reset Output

Watchdog

Reverse Battery Protection

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^**

MAX8840

1.5 to 4.5

0.17

150

MicroDFN/6
Ultra Thin MicroDFN/6

-40 to +85

$0.54 @ 1k

MAX8841

1.5 to 4.5

MicroDFN/6

$0.54 @ 1k

MAX8842

1.225

MicroDFN/6

$0.54 @ 1k

See All Linear Regulators (137)

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 prices and delivery, please see the price and availability page or contact an authorized distributor.