Maxim MAX8875EUK25-T, MAX8875EUK27-T, MAX8875EUK30-T, MAX8875EUK50-T, MAX8875EUK33-T Datasheet

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General Description

The MAX8875 low-dropout linear regulator operates from
a +2.5V to +6.5V input range and delivers up to 150mA.
A P-channel MOSFET pass transistor allows its 85µA sup­ply current to remain independent of the load, making this
device ideal for battery-operated portable equipment
such as PCS phones, cellular phones, cordless phones,
and modems.

The MAX8875 features a power-OK output that indicates
when the output is out of regulation. The device is avail­able in several preset output voltage versions: 5.0V, 3.3V,

3.0V, 2.7V, or 2.5V. Other features include 1µA (max) shut­down current, short-circuit protection, thermal shutdown
protection, and reverse-battery protection. The device
comes in a miniature 5-pin SOT23 package.

The MAX8875 is optimized for use with a 1µF ceramic out­put capacitor. For a pin-compatible, functionally equivalent
device for use with a higher ESR output capacitor, see the
MAX8885 data sheet.

Applications

PCS Telephones Hand-Held Instruments

Cellular Telephones Palmtop Computers

Cordless Telephones Electronic Planners

PCMCIA Cards Modems

Features

♦ Power-OK Output

♦ Small Output Capacitor (1µF ceramic)

♦ Preset Output Voltages (±1% accuracy)

♦ Guaranteed 150mA Output Current

♦ 85µA No-Load Supply Current

♦ Low 110mV Dropout at 100mA Load (165mV at

150mA load)

♦ Thermal-Overload and Short-Circuit Protection

♦ Reverse-Battery Protection

♦ 60dB PSRR at 100Hz

♦ 1µA max Shutdown Current

MAX8875

150mA, Low-Dropout Linear Regulator

with Power-OK Output

________________________________________________________________ Maxim Integrated Products 1

Typical Operating Circuit

19-1556; Rev 0; 10/99

PART

MAX8875EUK25-T

MAX8875EUK27-T

MAX8875EUK30-T -40°C to +85°C

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

5 SOT23-5

5 SOT23-5

5 SOT23-5

Note: See Output Voltage Selector Guide for more information.

Note: Other output voltages between 2.5V and 5.0V are avail-

able in 100mV increments—contact the factory for information.
Minimum order quantity is 25,000 units.

Pin Configuration

Ordering Information

Output Voltage Selector Guide

MAX8875EUK33-T

MAX8875EUK50-T -40°C to +85°C

-40°C to +85°C 5 SOT23-5

5 SOT23-5

MAX8875EUK50

MAX8875EUK33

MAX8875EUK30

MAX8875EUK27

MAX8875EUK25

PART V

OUT

(V)

2.5

2.7

3.0

3.3

5.0 ADLD

ADLC

ADLB

ADLA

ADKZ

TOP MARK

TOP VIEW

1

IN

2

GND

3

SHDN

5

OUT

MAX8875

POK

4

OUTPUT

100k

PRESET

2.5V TO 5.0V
150mA

C

OUT

1µF

TO µC

INPUT
+2.5V TO +6.5V

ON

OFF

C

1µF

IN OUT

IN

MAX8875

SHDN

POK

GND

SOT23-5

MAX8875

150mA, Low-Dropout Linear Regulator
with Power-OK Output

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(V

IN

=

V

OUT(NOMINAL)

+ 1V, SHDN = IN, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

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.

IN, SHDN, POK to GND...............................................-7V to +7V

SHDN to IN ...............................................................-7V to +0.3V

OUT to GND ................................................-0.3V to (V

IN

+ 0.3V)

Output Short-Circuit Duration ........................................Indefinite

Continuous Power Dissipation (TA= +70°C)

5-Pin SOT23 (derate 7.1mW/°C above +70°C)..........571mW

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

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

θ

JA

...............................................................................+140°C/W

Storage Temperature Range .............................-65°C to +150°C

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

TA= -40°C to +85°C

-3 2

SHDN Input Threshold

(1 - V

OUT/VOUT(NOMINAL)

100, I

OUT

= 0,

V

OUT

falling

SHDN = IN or GND

TA= +25°C, I

OUT

= 100µA

VIN= 2.5V to 5.5V

TA= +25°C

SHDN = GND

I

OUT

= 150mA

I

OUT

= 100mA

f = 100Hz

C

OUT

= 10µF, f = 10Hz to 100kHz

I

OUT

= 50mA

I

OUT

= 100µA

I

OUT

= 100µA

I

OUT

= 100µA to 120mA, C

OUT

= 1µF

I

OUT

= 150mA

VIN= (V

OUT

+ 0.1V) to 6.5V, I

OUT

= 1mA

CONDITIONS

%

-3 -5 -8

V

POK

Power-OK Voltage Threshold

0.05

nA

0100

I

SHDN

SHDN Input Bias Current

0.4

V

IL

V

2.0

V

IH

0.02

TA= +85°C

µA

0.005 1

I

OFF

Shutdown Supply Current

dB

60

PSRR

Output Voltage AC Power­Supply Rejection Ratio

µV

RMS

170

Output Voltage Noise

%/mA

0.01

∆V

LDR

Load Regulation

%/V

-0.15 0 0.15

∆V

LNR

Line Regulation

-2 2

TA= +25°C

TA= +85°C

%

-1.0 1.0

V

2.5 6.5

V

IN

Input Voltage

Output Voltage Accuracy

165

110 220

mV

50

0.1

V

IN -VOUT

Dropout Voltage (Note 2)

mA

150

I

OUT

Maximum Output Current

mA

160 390

I

LIM

Current Limit

µA

85 180

I

Q

Ground Pin Current

100

UNITSMIN TYP MAXSYMBOLPARAMETER

Hysteresis, I

OUT

= 0

In dropout, V

OUT

falling

1

-5.3

I

OUT

= 100µA to

120mA

I

OUT

= 100µA

SHUTDOWN

POWER-OK OUTPUT

MAX8875

150mA, Low-Dropout Linear Regulator

with Power-OK Output

_______________________________________________________________________________________ 3

5

Typical Operating Characteristics

(MAX8875EUK30, VIN= +3.6V, CIN= C

OUT

= 1µF, SHDN = IN, TA= +25°C, unless otherwise noted.)

ELECTRICAL CHARACTERISTICS (continued)

(VIN= V

OUT(NOMINAL)

+ 1V, SHDN = IN, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

Note 1: Limits are 100% production tested at T

A

= +25°C. Limits over the operating temperature range are guaranteed through

correlation using Statistical Quality Control (SQC) methods.

Note 2: Dropout voltage is defined as V

IN

- V

OUT

, when V

OUT

is 100mV below the value of V

OUT

for VIN= V

OUT

+ 0.5V.

POK Output Voltage Low V

OL

0.4

V

Thermal Shutdown Temperature T

SHDN

170

°C

Thermal Shutdown Hysteresis ∆T

SHDN

20

°C

I

SINK

= 1mA

PARAMETER SYMBOL MIN TYP MAX UNITSCONDITIONS

POK Output Leakage Current

1

µA0 ≤ V

POK

≤ 6.5V, V

OUT

in regulation

THERMAL PROTECTION

GROUND PIN CURRENT vs.

INPUT VOLTAGE

120

I

= 150mA

100

80

60

40

GROUND PIN CURRENT (µA)

20

OUT

MAX8875toc01

I

= 0

OUT

GROUND PIN CURRENT vs.

OUTPUT LOAD

115

110

105

100

95

GROUND PIN CURRENT (µA)

90

GROUND PIN CURRENT vs.

OUTPUT LOAD

OUT(NOMINAL)

+ 0.5V

V

= 5.0V

OUT

MAX8875EUK50

V

= 3.0V

OUT

MAX8875EUK30

VIN = 5.0V

VIN = 3.5V

MAX8875toc02

120

VIN = V

115

110

105

100

95

GROUND PIN CURRENT (µA)

90

MAX8875toc03

0

0231 456

INPUT VOLTAGE (V)

GROUND PIN CURRENT vs.

TEMPERATURE

130

120

110

100

90

80

GROUND PIN CURRENT (µA)

70

60

-40 10-15 35 60 8

VIN = 5.0V

= 150mA

I

OUT

VIN = 3.6V
I

OUT

VIN = 3.6V OR 5.0V

= 0

I

OUT

TEMPERATURE (°C)

= 150mA

85

0604515 30 75 90 105 120 135 150

OUTPUT LOAD (mA)

OUTPUT VOLTAGE vs.

INPUT VOLTAGE

3.5

3.0

2.5

2.0

1.5

OUTPUT VOLTAGE (V)

1.0

0.5

0

I

= 0

OUT

I

= 150mA

OUT

0231 456

INPUT VOLTAGE (V)

85

3.10

MAX8875toc05

3.05

3.00

OUTPUT VOLTAGE (V)

2.95

2.90

0604515 30 75 90 105 120 135 150

OUTPUT LOAD (mA)

OUTPUT VOLTAGE vs. OUTPUT LOAD

MAX8875toc06

VIN = 3.6V

VIN = 5.0V

04530 105907515 60 120 135 150

OUTPUT LOAD (mA)