MAX1982, MAX1982EUT, MAX1983 Low-Voltage, Low-Dropout Linear Regulators with External Bias Supply

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The MAX1982/MAX1983 are low-voltage, low-dropout linear regulators with an external bias supply input. The 5V bias supply drives the gate of the internal N-channel pass transistor, making these devices ideal for applications that require low-voltage outputs from low-voltage inputs. The MAX1982 delivers 1.2V (±3%) at 300mA from an input voltage of 1.25V to 5.5V. The MAX1983 delivers an adjustable output voltage from 0.8V to 2V.

The MAX1982/MAX1983 include a current-limit and thermal shutdown that protects the regulator in the event of a fault condition. Both devices are offered in a 6-pin SOT23 package and are specified over the extended (-40°C to +85°C) temperature range.

Key Features

Applications/Uses

	Low-Cost 1.2V, 300mA VID Supply
	±3% Output Voltage Accuracy
	No Minimum Load Current Required
	1.25V to 5.5V Input Supply Voltage
	5V Input Bias Supply Voltage
	Power-Good (PGOOD) Open-Drain Output with 1ms Rising Edge Propagation Delay (MAX1982)
	Adjustable Output Voltage (MAX1983)
	Low Supply Current (I_BIAS + I_IN = 165µA typ)
	5µA (max) Shutdown Supply Current
	Tiny 6-Pin SOT23 Package

	Cell Phones
	Low-Dropout Regulators with External Bias Supply
	Notebook Computers
	PDAs
	VID Power Supplies

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

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

Operating Temp. Range (°C)

Price^**

MAX1982

1.25

5.5

1.2

0.35

300

250

Reset

Open Drain Active Low

Vout-9%

SOT-23/6

-40 to +85

$0.74 @ 1k

MAX1983

0.8

$0.74 @ 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.