MAX1589 Low-Input-Voltage, 500mA LDO Regulator with Active-Low RESET in SOT and TDFN

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The MAX1589 low-dropout linear regulator operates from a +1.62V to +3.6V supply and delivers a guaranteed 500mA continuous load current with a low 175mV dropout. The high-accuracy (±0.5%) output voltage is preset to internally trimmed voltages from +0.75V to +3.0V. An active-low, open-drain reset output remains asserted for at least 70ms after the output voltage reaches regulation. This device is offered in 6-pin thin SOT23 and 6-pin 3mm x 3mm thin DFN packages.

An internal PMOS pass transistor maintains low supply current, independent of load and dropout voltage, making the MAX1589 ideal for portable battery-powered equipment such as personal digital assistants (PDAs), digital still cameras, cell phones, cordless phones, and notebook computers. Other features include logic-controlled shutdown, short-circuit protection, and thermal-overload protection.

Key Features

Applications/Uses

Low 1.62V Minimum Input Voltage
Guaranteed 500mA Output Current
±0.5% Initial Accuracy
Low 175mV Dropout at 500mA Load
70ms Active-Low RESET Output Flag
Supply Current Independent of Load and Dropout Voltage
Logic-Controlled Shutdown
Thermal-Overload and Short-Circuit Protection
Preset Output Voltages (0.75V, 1.0V, 1.2V, 1.3V, 1.5V, 1.8V, 2.5V, and 3.0V)
Tiny 6-Pin Thin SOT23 Package (< 1.1mm High)
Thin 6-Pin TDFN Package (< 0.8mm High)

	CD and MP3 Players
	Cellular and PCS Phones
	Digital Still Cameras
	Handheld Computers
	Notebook Computers
	PCMCIA Cards
	PDAs and Other Handheld Devices

Key Specifications: Linear Regulators

Part Number

Regulators per Pkg.

Min. V_IN (V)

Max. V_IN (V)

Preset 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

POK/ Reset Output Type

Nominal POK/Reset Threshold (V)

Min. Reset Pulse Width (ms)

Watchdog

Reverse Battery Protection

Package

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

Operating Temp. Range (°C)

Price^**

MAX1589

1.62

3.6

0.75
1.0
1.3
1.5
1.8
2.5
3.0

0.175

500

140

Reset

Open Drain Active Low

Vout-17.5%

SOT-23/6
THIN QFN (Dual)/6

-40 to +85

$1.00 @ 1k

See All Linear Regulators (139)

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.