Maxim MAX8885EUK50, MAX8885EUK33, MAX8885EUK30, MAX8885EUK25, MAX8885EUK27 Datasheet

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General Description

The MAX8885 low-dropout (LDO) linear regulator operates
from a +2.5V to +6.5V input voltage range and delivers up
to 150mA. It uses a P-channel MOSFET pass transistor to
allow a low 85µA supply current—which is independent of
the load—as well as LDO voltage. The MAX8885 is opti­mized to operate with low-cost, high-ESR output capaci­tors such as small case-size tantalum capacitors. It is ideal
for cost-sensitive portable equipment such as PCS and
cellular phones. For a pin-compatible, functionally equiva­lent device for use with a low-ESR, ceramic output capaci­tor, refer to the MAX8875 data sheet.

The MAX8885 features a power-OK output that indicates
when the output is out of regulation, and is available in
preset output voltage versions of 5.0V, 3.3V, 3.0V, 2.7V,
and 2.5V. Other features include 1µA (max) shutdown cur­rent, short-circuit protection, thermal shutdown protection,
and reverse-battery protection. The MAX8885 is available
in a miniature 5-pin SOT23 package.

Applications

PCS Phones Modems

Cellular Phones Hand-Held Instruments

Cordless Phones Palmtop Computers

PCMCIA Cards Electronic Planners

Features

♦ Optimized for Low-Cost Tantalum Capacitors

♦ Pin Compatible with MIC5206

♦ Undervoltage Power-OK Output

♦ 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

MAX8885

150mA, Low-Dropout Linear Regulator

with Power-OK Output

________________________________________________________________ Maxim Integrated Products 1

Typical Operating Circuit

19-1576; Rev 0; 10/99

PART

MAX8885EUK25

MAX8885EUK27

MAX8885EUK30 -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.

Pin Configuration

Ordering Information

MAX8885EUK33

MAX8885EUK50 -40°C to +85°C

-40°C to +85°C 5 SOT23-5

5 SOT23-5

Output Voltage Selector Guide

Note: Other output voltages between 2.5V and 5.0V are avail­able in 100mV increments—contact factory for information.
Minimum order quantity is 25,000 units.

PART

MAX8885EUK25

MAX8885EUK27

MAX8885EUK30

MAX8885EUK33

MAX8885EUK50

V

OUT

(V)

2.5

2.7

3.0

3.3

5.0

TOP MARK

ADLE

ADLF

ADLG

ADLH

ADLJ

TOP VIEW

SHDN

GND

1

IN

MAX8885

2

3

5

OUT

POK

4

OUTPUT

100k

PRESET

2.5V TO 5.0V
150mA

C

OUT

4.7µF

TO
µC

INPUT
+2.5V TO +6.5V

C

IN

1µF

ON

OFF

IN OUT

MAX8885

SHDN

POK

GND

SOT23-5

MAX8885

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

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(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)

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 (T

A

= +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= +25°C

TA= -40°C to +85°C, I

OUT

= 100µA

VIN= 2.5V to 5.5V

TA= +25°C, I

OUT

= 100µA

SHDN = GND

f = 100Hz

I

OUT

= 100mA

I

OUT

= 50mA

C

OUT

= 10µF, f = 10Hz to 100kHz

I

OUT

= 100µA to 120mA, C

OUT

= 4.7µF

I

OUT

= 100µA

I

OUT

= 150mA

TA= -40°C to +85°C,
I

OUT

= 100µA to 120mA

VIN= (V

OUT

+ 0.1V) to 6.5V, I

OUT

= 1mA

I

OUT

= 100µA

I

OUT

= 150mA

CONDITIONS

0.05

nA

0 100

I

SHDN

SHDN Input Bias Current

0.4

V

IL

V

2.0

V

IH

SHDN Input Threshold

0.02

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

165

%

-2 2

-1 1

V

2.5 6.5

V

IN

Input Voltage

Output Voltage Accuracy

110 220

mV

50

0.1

VIN-

V

OUT

Dropout Voltage (Note 2)

100

-3 2

mA

150

I

OUT

Maximum Output Current

mA

160 390

I

LIM

Current Limit

µA

85 180

I

Q

Ground Pin Current

UNITSMIN TYP MAXSYMBOLPARAMETER

TA= +25°C

TA= +85°C

V

SHDN

= 5.5V or GND

TA= +85°C

SHUTDOWN

MAX8885

150mA, Low-Dropout Linear Regulator

with Power-OK Output

_______________________________________________________________________________________ 3

Note 1: Limits are 100% production tested at TA= +25°C. Limits over the operating temperature range are guaranteed through cor-

relation 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.

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)

CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER

I

SINK

= 1mA

Hysteresis, I

OUT

= 0

In dropout, V

OUT

falling

(1 - V

OUT

/ V

OUT(NOMINAL)

)100, V

OUT

falling,

I

OUT

= 0

V

0.4

V

OL

POK Output Voltage Low

1

-5.3

%

-3 -5 -8

V

POK

Power-OK Voltage Threshold

0 ≤ V

POK

≤ 6.5V, V

OUT

in regulation

°C

20

∆T

SHDN

Thermal Shutdown Hysteresis

°C

170

T

SHDN

Thermal Shutdown Temperature

µA

1

POK Output Leakage Current

Typical Operating Characteristics

(MAX8885EUK30, VIN= +3.6V, CIN= 1µF, C

OUT

= 4.7µF, SHDN = IN, TA= +25°C, unless otherwise noted.)

0

40

20

80

60

100

120

0231 456

GROUND PIN CURRENT

vs. INPUT VOLTAGE

MAX8885toc01

INPUT VOLTAGE (V)

GROUND PIN CURRENT (µA)

I

OUT

= 0

I

OUT

= 150mA

85

100

95

90

105

110

115

0604515 30 75 90 105 120 135 150

GROUND PIN CURRENT vs.

OUTPUT LOAD

MAX8885toc02

OUTPUT LOAD (mA)

GROUND PIN CURRENT (µA)

VIN = 3.5V

VIN = 5.0V

85

100

105

95

90

110

115

120

0604515 30 75 90 105 120 135 150

GROUND PIN CURRENT vs.

OUTPUT LOAD

MAX8885toc03

OUTPUT LOAD (mA)

GROUND PIN CURRENT (µA)

VIN = V

OUT(NOMINAL)

+ 0.5V

V

OUT

= 5.0V

MAX8885EUK50

V

OUT

= 3.0V

MAX8885EUK30

POWER-OK OUTPUT

THERMAL PROTECTION