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MAX1982

Low-Voltage, Low-Dropout Linear Regulators with External Bias Supply

Maxim Integrated 

Low-Voltage, Low-Dropout Linear Regulators

with External Bias Supply

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 3, VIN = 1.8V, ILOAD = 1mA, CLOAD = 10µF, TA = 0°C to +85°C, unless otherwise noted. Typical values are at

TA = +25°C.) (Note 1)

PARAMETER

LOGIC AND I/O

SHDN Input High Voltage

SHDN Input Low Voltage

SHDN Input Current

PGOOD Output Low Voltage

SYMBOL

CONDITIONS

VIH

VIL

PGOOD sinking 1mA

MIN TYP MAX UNITS

2.4

V

0.8

V

-1

+1

µA

0.1

V

PGOOD Output

High Leakage Current

0 < VPGOOD < VIN

-1

+1

µA

DYNAMICS

Positive Load Step

Negative Load Step

tRISE

tFALL

ILOAD = 1mA to full load, CLOAD = 10µF

ILOAD = full load to 1mA, CLOAD = 10µF

10

µs

50

µs

Ripple Rejection at VIN

10Hz < f < 10kHz, ILOAD = 300mA,

CLOAD = 10µF

-60

dB

Startup Response Time

tON

ILOAD = 300mA, CLOAD = 10µF, 0% to 90%

of nominal output voltage

100

µs

Startup Overshoot

PGOOD Propagation Delay

ILOAD = 300mA, CLOAD = 10µF

Falling edge, 3mV under trip threshold

tPD

Rising edge within 5% of regulation level

0.5

%

10

µs

1

4

ms

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 3, VIN = 1.8V, ILOAD = 1mA, CLOAD = 10µF, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

MAX

Input Voltage

VIN

1.25

5.5

BIAS Voltage

VBIAS

4.5

5.5

VOUT Voltage Range

VOUT MAX1983

0.8

2.0

BIAS Input Undervoltage Lockout

3.8

4.2

Shutdown Supply Current

IIN

1.25V < VIN < 5.5V

5

Quiescent BIAS Current

IQ

4.5V < VBIAS < 5.5V

250

Shutdown BIAS Current

ISHDN 4.5V < VBIAS < 5.5V

5

MAX1982: VIN = open, VOUT = 1.20V

30

VOUT Input Bias Current

MAX1983: VIN = open, 0.8V < VOUT < 2.0V

2

REGULATOR CHARACTERISTICS

Line Regulation

ΔVOUT/

ΔVIN

ILOAD = 10mA, 1.5V < VIN < 5.5V

-0.15

+0.15

MAX1982 1.20V

Output Voltage Accuracy

VOUT

IOUT = 1mA to 300mA,

VOUT + 0.5V < VIN < 5.5V

-3

+3

UNITS

V

V

V

V

µA

µA

µA

µA

%/V

%

_______________________________________________________________________________________ 3

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