Low-Voltage, Low-Dropout Linear Regulators

with External Bias Supply

2

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ADJ, IN, BIAS, PGOOD, SHDN, OUT to GND..........-0.3V to +6V

Output Short-Circuit Duration ............................................Infinite

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature ......................................................+150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage

1.25

5.5

V

BIAS Voltage

4.5

5.5

V

MAX1983

0.8

2.0

V

BIAS Input Undervoltage Lockout

3.8

4.1

4.35

V

Shutdown Supply Current

1

5

µA

Quiescent BIAS Current

140

250

µA

Shutdown BIAS Current

1

5

µA

30

2

µA

MAX1983 ADJ Input Current

1µA

REGULATOR CHARACTERISTICS

Line Regulation

-0.15

+0.15

%/V

-1

+1

MAX1982 1.20V

Output Voltage Accuracy

-3

+3

%

-1

+1

MAX1983 0.80V

Output Voltage Accuracy

-3

+3

%

350

Dropout Voltage

175

mV

Current Limit

330

600

1400

mA

Thermal-Shutdown Temperature

160

°C

Thermal-Shutdown Hysteresis

20

°C

RMS Output Noise

10Hz to 100kHz

65

PGOOD COMPARATOR

Comparator Threshold

% of regulated output voltage

-12.5

-9

-6

%

Comparator Hysteresis

10

mV