MAX6469, MAX6470, MAX6471, MAX6472, MAX6473, MAX6474, MAX6475, MAX6476, MAX6477, MAX6478, MAX6479, MAX6480, MAX6481, MAX6482, MAX6483, MAX6484 300mA LDO Linear Regulators with Internal Microprocessor Reset Circuit

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The MAX6469–MAX6484 are low-dropout linear regulators with a fully integrated microprocessor reset circuit. Each is available with preset output voltages from +1.5V to +3.3V in 100mV increments and delivers up to 300mA of load current. These devices consume only 82µA of supply current. The low supply current, low dropout voltage, and integrated reset functionality make these devices ideal for battery-powered portable equipment.

The MAX6469–MAX6484 include a reset output that indicates when the regulator output drops below standard microprocessor supply tolerances (-7.5% or -12.5% of nominal output voltage). This eliminates the need for an external microprocessor supervisor, while ensuring that supply voltages and clock oscillators have stabilized before processor activity is enabled. Push-pull and open-drain active-low reset outputs are available, with reset timeout periods of 2.5ms, 20ms, 150ms, or 1200ms (min).

The MAX6469/MAX6470/MAX6473–MAX6478/MAX6481–MAX6484 also have a shutdown feature that reduces the supply current to 0.1µA (typ). The MAX6471-MAX6474/MAX6479–MAX6482 offer a manual reset input to assert a microprocessor reset while the regulator output is within specification. The MAX6475/MAX6476/MAX6483/MAX6484 feature a remote feedback sense pin for use with an external NPN transistor for higher-current applications. The MAX6469–MAX6476 are available in 6-pin SOT23 and 8-pin TDFN packages. The MAX6477–MAX6484 are available in a 3 × 3 chip-scale package (UCSP™). All devices are specified for operation from -40°C to +85°C.

Key Features

Applications/Uses

3 x 3 UCSP, 6-Pin SOT23, and 8-Pin TDFN Packages
Preset +1.5V to +3.3V Output (100mV Increments)
SET Pin for Adjustable Output Voltage
75µV_RMS LDO Output Voltage Noise (MAX6477–MAX6484)
±2.0% Accuracy Over Temperature
Guaranteed 300mA Output Current
Low Dropout Voltage
- 55mV at 150mA
- 114mV at 300mA
82µA Supply Current, 0.1µA Shutdown Current
Input Reverse Current, Thermal and Short-Circuit Protection
Microprocessor Reset with Four Timeout Options
Push-Pull or Open-Drain Active-Low RESET
Manual Reset Input
Remote Feedback Sense

	Bluetooth® Modules/Wireless LAN
	CD/DVD Drives
	Cell Phones/Cordless Phones
	Digital Cameras
	Handheld Instruments (PDAs, Palmtops)
	Notebook Computers
	PCMCIA Cards/USB Devices

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

POK/ Reset Output Type

Nominal POK/Reset Threshold (V)

Min. Reset Pulse Width (ms)

Watchdog

Reverse Battery Protection

Package

Operating Temp. Range (°C)

Price^**

MAX6469

2.5

5.5

1.5 to 3.3

0.11

300

136

Reset

Push-Pull Active Low

Vout-12.5%
Vout-7.5%

1200
150
2.5
20

SOT-23/6
THIN QFN (Dual)/8

-40 to +85

$1.50 @ 1k

MAX6470

Open Drain Active Low

SOT-23/6
THIN QFN (Dual)/8

$1.50 @ 1k

MAX6471

Push-Pull Active Low

SOT-23/6
THIN QFN (Dual)/8

$1.50 @ 1k

MAX6472

Open Drain Active Low

SOT-23/6
THIN QFN (Dual)/8

$1.50 @ 1k

MAX6473

Push-Pull Active Low

SOT-23/6
THIN QFN (Dual)/8

$1.50 @ 1k

MAX6474

Open Drain Active Low

SOT-23/6
THIN QFN (Dual)/8

$1.50 @ 1k

MAX6475

1.23

Push-Pull Active Low

SOT-23/6
THIN QFN (Dual)/8

$1.50 @ 1k

MAX6476

1.23

Open Drain Active Low

SOT-23/6
THIN QFN (Dual)/8

$1.50 @ 1k

MAX6477

Push-Pull Active Low

UCSP/6

$1.50 @ 1k

MAX6478

Open Drain Active Low

UCSP/0
UCSP/6

$1.50 @ 1k

MAX6479

Push-Pull Active Low

UCSP/6

$1.35 @ 10k

MAX6480

Open Drain Active Low

UCSP/6

$1.50 @ 1k

MAX6481

Push-Pull Active Low

UCSP/0
UCSP/6

$1.50 @ 1k

MAX6482

Open Drain Active Low

UCSP/6

$1.50 @ 1k

MAX6483

1.23

Push-Pull Active Low

UCSP/6

$1.35 @ 10k

MAX6484

1.23

Open Drain Active Low

UCSP/6

$1.43 @ 5k

See All Linear Regulators (141)

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.