MAX1818EUT50 datasheet(3/9 Pages) MAXIM

Part #	MAX1818EUT50

Description	500mA Low-Dropout Linear Regulator in SOT23

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Manufacturer	MAXIM [Maxim Integrated Products]

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500mA Low-Dropout

Linear Regulator in SOT23

_______________________________________________________________________________________

3

ELECTRICAL CHARACTERISTICS (continued)

(VIN = VOUT + 500mV or VIN = +2.5V, whichever is greater; SHDN = IN, TA = -40°C to +85°C, unless otherwise noted. Typical values

are at TA = +25°C.) (Note 3)

Note 3: All devices are 100% production tested at TA = +25

°C. Limits over the operating temperature range are guaranteed by

design.

Note 4: The Dropout Voltage is defined as VIN - VOUT, when VOUT is 100mV below the value of VOUT measured for VIN = VOUT(NOM)

+ 500mV. Since the minimum input voltage is 2.5V, this specification is only meaningful when VOUT(NOM) > 2.5V. For

VOUT(NOM) between 2.5V and 3.5V, use the following equations: Typical Dropout = -93mV/V ✕ VOUT(NOM) + 445mV;

Guaranteed Maximum Dropout = -137mV/V

✕ VOUT(NOM) +7004mV. For VOUT(NOM) > 3.5V, Typical Dropout = 120mV;

Maximum Dropout = 220mV.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Load Regulation

∆VLDR

IOUT = 1mA to 500mA

0.4

1.0

%

Output Voltage Noise

10Hz to 1MHz, COUT = 3.3µF (ESR < 0.1

Ω)

115

µVRMS

SHUTDOWN

Shutdown Supply Current

IOFF

SHDN = GND, VIN = 5.5V

0.1

15

µA

VIH

2.5V < VIN < 5.5V

1.6

SHDN Input Threshold

VIL

2.5V < VIN < 5.5V

0.6

V

SHDN = IN or GND, TA = +25°C1

25

SHDN Input Bias Current

ISHDN

TA = +85°C5

nA

POK OUTPUT

POK Output Low Voltage

VOL

POK sinking 1mA

0.01

0.1

V

Operating Voltage Range for

Valid POK

POK sinking 100µA

1.0

5.5

V

POK = 5.5V, TA = +25°C1

25

POK Output High Leakage

Current

TA = +85°C5

nA

POK Threshold

Rising edge, referred to VOUT(NOMINAL)

90

93

96

%

THERMAL PROTECTION

Thermal Shutdown Temperature

TSHDN

170

°C

Thermal Shutdown Hysteresis

∆TSHDN

20

°C

Typical Operating Characteristics

(VIN = (VOUT + 500mV) or +2.5V, whichever is greater; SHDN = IN, CIN = 1µF, COUT = 3.3µF, TA = +25°C, unless otherwise noted.)

0

50

25

125

100

75

150

175

225

200

250

0

1.0 1.5

0.5

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

GROUND PIN CURRENT

vs. INPUT VOLTAGE

INPUT VOLTAGE (V)

ILOAD = 150mA

3.3V OUTPUT

2.5V OUTPUT

1.8V OUTPUT

40

70

55

85

130

145

115

100

160

0

0.2 0.3 0.4 0.5

0.1

0.6 0.7 0.8 0.9 1.0

LOAD CURRENT (A)

GROUND PIN CURRENT

vs. LOAD CURRENT

3.3V OUTPUT

2.5V OUTPUT

1.8V OUTPUT

110

130

120

150

140

160

170

-40

10

-15

35

60

85

TEMPERATURE (

°C)

GROUND PIN CURRENT

vs. TEMPERATURE

1.5V OUTPUT

5.0V OUTPUT

ILOAD = 150mA

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