MAX1982 datasheet(3/12 Pages) MAXIM

3 / 12 page

Low-Voltage, Low-Dropout Linear Regulators

with External Bias Supply

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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)

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

TYP

MAX

UNITS

LOGIC AND I/O

SHDN Input High Voltage

VIH

2.4

SHDN Input Low Voltage

VIL

0.8

SHDN Input Current

-1

µA

PGOOD Output Low Voltage

PGOOD sinking 1mA

0.1

PGOOD Output

High Leakage Current

0 < VPGOOD < VIN

-1

µA

DYNAMICS

Positive Load Step

tRISE

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

µs

Negative Load Step

tFALL

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

µs

Ripple Rejection at VIN

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

CLOAD = 10µF

-60

Startup Response Time

tON

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

of nominal output voltage

100

µs

Startup Overshoot

ILOAD = 300mA, CLOAD = 10µF

0.5

Falling edge, 3mV under trip threshold

µs

PGOOD Propagation Delay

tPD

Rising edge within 5% of regulation level

PARAMETER

SYMBOL

CONDITIONS

MIN

MAX

UNITS

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

µA

Quiescent BIAS Current

4.5V < VBIAS < 5.5V

250

µA

Shutdown BIAS Current

ISHDN

4.5V < VBIAS < 5.5V

µA

MAX1982: VIN = open, VOUT = 1.20V

VOUT Input Bias Current

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

µA

REGULATOR CHARACTERISTICS

Line Regulation

∆VOUT/

∆VIN

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

-0.15

+0.15

%/V

MAX1982 1.20V

Output Voltage Accuracy

VOUT

IOUT = 1mA to 300mA,

VOUT + 0.5V < VIN < 5.5V

-3

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