Maxim MAX8864SEUK-T, MAX8864REUK-T, MAX8863TEUK-T, MAX8863SEUK-T, MAX8863REUK-T Datasheet

_______________General Description

The MAX8863T/S/R and MAX8864T/S/R low-dropout lin­ear regulators operate from a +2.5V to +6.5V input
range and deliver up to 120mA. A PMOS pass transis­tor allows the low, 80µA supply current to remain inde­pendent of load, making these devices ideal for
battery-operated portable equipment such as cellular
phones, cordless phones, and modems.

The devices feature Dual Mode™ operation: their out­put voltage is preset (at 3.15V for the T versions, 2.84V
for the S versions, or 2.80V for the R versions) or can be
adjusted with an external resistor divider. Other fea­tures include low-power shutdown, short-circuit protec­tion, thermal shutdown protection, and reverse battery
protection. The MAX8864 also includes an auto-dis­charge function, which actively discharges the output
voltage to ground when the device is placed in shut­down mode. Both devices come in a miniature 5-pin
SOT23-5 package.

________________________Applications

Cordless Telephones Modems
PCS Telephones Hand-Held Instruments
Cellular Telephones Palmtop Computers
PCMCIA Cards Electronic Planners

____________________________Features

♦ Low Cost
♦ Low, 55mV Dropout Voltage @ 50mA I

OUT

♦ Low, 68µA No-Load Supply Current

Low, 80µA Operating Supply Current (even in
dropout)

♦ Low, 350µV

RMS

Output Noise

♦ Miniature External Components
♦ Thermal Overload Protection
♦ Output Current Limit
♦ Reverse Battery Protection
♦ Dual Mode™ Operation: Fixed or Adjustable

(1.25V to 6.5V) Output

♦ Low-Power Shutdown

MAX8863T/S/R, MAX8864T/S/R

Low-Dropout, 120mA Linear Regulators

________________________________________________________________

Maxim Integrated Products

1

SOT23-5

TOP VIEW

GND

OUT

IN

1

5

SET

SHDN

MAX8863
MAX8864

2

3

4

__________________Pin Configuration

MAX8863
MAX8864

OUT

GND SET

IN

SHDN

C

OUT

1µF

C

IN

1µF

BATTERY

OUTPUT
VOLTAGE

__________Typical Operating Circuit

19-0466; Rev 2; 11/98

PART

MAX8863TEUK-T

MAX8863SEUK-T

MAX8864TEUK-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

______________Ordering Information

SOT TOP

MARK*

AABE
AABF

AABG

MAX8864SEUK-T -40°C to +85°C 5 SOT23-5 AABH

Dual Mode is a trademark of Maxim Integrated Products.

MAX8863REUK-T -40°C to +85°C 5 SOT23-5 AABV

MAX8864REUK-T -40°C to +85°C 5 SOT23-5 AABW

*

Alternate marking information: CY_ _ = MAX8863T,

CZ_ _ = MAX8863S, DA_ _ = MAX8864T, DB_ _ = MAX8864S

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone].

MAX8863T/S/R, MAX8864T/S/R

Low-Dropout, 120mA Linear Regulators

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN= +3.6V, GND = 0V, TA= T

MIN

to T

MAX

, 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.

VINto GND ..................................................................-7V to +7V

Output Short-Circuit Duration ............................................Infinite

SET to GND..............................................................-0.3V to +7V

SHDN

to GND..............................................................-7V to +7V

SHDN

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

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

IN

+ 0.3V)

Continuous Power Dissipation (T

A

= +70°C)

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

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

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

θJA..............................................................................140°C/Watt

Storage Temperature Range.............................-65°C to +160°C

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

Ω

300

Shutdown Discharge
Resistance (MAX8864)

0.05

0 100

I

SHDN

SHDN Input Bias Current

V

0.4V

IL

SHDN Input Threshold

2.0V

IH

µV

RMS

220

Output Voltage Noise

350

%/mA

0.011 0.040

%/V-0.15 0 0.15∆V

LNR

Line Regulation

mV

55 120

Dropout Voltage (Note 5)

V2.5 6.5V

IN

Input Voltage (Note 2)

1.1

µA

68 150

I

Q

Ground Pin Current

3.05 3.15 3.25

V

OUT

Output Voltage

VV

SET

6.5V

OUT

Adjustable Output Voltage
Range (Note 3)

mA120Maximum Output Current

UNITSMIN TYP MAXSYMBOLPARAMETER

V

SHDN

= V

IN

C

OUT

= 100µF

I

LOAD

= 0mA

VIN= 2.5V to 6.5V, SET tied to OUT,
I

OUT

= 1mA

0mA ≤ I

OUT

≤ 50mA,

SET = GND

I

OUT

= 50mA

CONDITIONS

mA280I

LIM

Current Limit (Note 4)

V

MAX886_T

10Hz to 1MHz

I

OUT

= 1mA

SET = GND

C

OUT

= 1µF

MAX886_S 2.75 2.84 2.93

I

LOAD

= 50mA 80

0.02

µA

0.0001 1

I

QSHDN

Shutdown Supply Current V

OUT

= 0V

TA= T

MAX

TA= +25°C

TA= T

MAX

TA= +25°C

nA

MAX886_R 2.70 2.80 2.88

I

OUT

= 0mA to 50mA

0.006

∆V

LDR

Load Regulation

SET tied to OUT

SET = GND

SHUTDOWN

MAX8863T/S/R, MAX8864T/S/R

Low-Dropout, 120mA Linear Regulators

_______________________________________________________________________________________

3

__________________________________________Typical Operating Characteristics

(V

IN

= +3.6V, CIN= 1µF, C

OUT

= 1µF, TA= +25°C, MAX886_T, unless otherwise noted.)

UNITSMIN TYP MAXSYMBOLPARAMETER CONDITIONS

ELECTRICAL CHARACTERISTICS (continued)

(VIN= +3.6V, GND = 0V, TA= T

MIN

to T

MAX

, 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 cor-

relation using Statistical Quality Control (SQC) Methods.

Note 2: Guaranteed by line regulation test.
Note 3: Adjustable mode only.
Note 4: Not tested. For design purposes, the current limit should be considered 120mA minimum to 420mA maximum.
Note 5: The dropout voltage is defined as (V

IN

- V

OUT

) when V

OUT

is 100mV below the value of V

OUT

for VIN= V

OUT

+2V.

T

SHDN

˚CThermal Shutdown Temperature 170

∆T

SHDN

˚CThermal Shutdown Hysteresis 20

SET Input Leakage Current
(Note 3)

nA

0.015 2.5

I

SET

V

SET

= 1.3V

SET Reference Voltage (Note 3) V

1.225 1.25 1.275

V

SET

V

IN

= 2.5V to 6.5V,

I

OUT

= 1mA

SET INPUT

THERMAL PROTECTION

TA= +25°C

TA= +25°C
TA= T

MIN

to T

MAX

TA= T

MAX

0.5

1.215 1.25 1.285

3.00

3.05

3.10

3.15

3.20

3.25

3.30

0 20 60 100

OUTPUT VOLTAGE

vs. LOAD CURRENT

MAX8863/4-01

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

40 8010 30 7050 90

100

50

0 20 60 100

SUPPLY CURRENT

vs. LOAD CURRENT

60

90

MAX8863/4-02

LOAD CURRENT (mA)

SUPPLY CURRENT (µA)

40 8010 30 7050 90

80

70

95

55

85

75

65

0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

012 4 6

OUTPUT VOLTAGE

vs. INPUT VOLTAGE

MAX8863/4-03

INPUT VOLTAGE (V)

OUTPUT VOLTAGE (V)

35

NO LOAD