Maxim MAX8860EUA28, MAX8860EUA27, MAX8860EUA25, MAX8860EUA18, MAX8860EUA30 Datasheet

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General Description

The MAX8860 low-noise, low-dropout linear regulator
operates from a +2.5V to +6.5V input and is guaran­teed to deliver 300mA. Typical output noise for this
device is 60µV

RMS

, and typical dropout is 105mV at
200mA. In addition to the six available preset output
voltages (+1.8V, +2.5V, +2.77V, +2.82V, +3.0V, and
+3.3V), the Dual Mode™ feature allows the device to
be configured as an adjustable output regulator from
+1.25V to +6.5V.

Designed with an internal P-channel MOSFET pass tran­sistor, the MAX8860 has a low 120µA supply current. An
output fault-detection circuit indicates loss of regulation.
Other features include a 10nA, logic-controlled shut­down mode, short-circuit and thermal-shutdown protec­tion, and reverse battery protection. The MAX8860 is
available in a miniature 8-pin µMAX package.

Applications

Wireless Handsets

DSP Core Power

PCMCIA Cards

Hand-Held Instruments

Palmtop Computers

Electronic Planners

Features

♦ High Output Current (300mA)

♦ Low Output Voltage Noise: 60µV

RMS

♦ Low 105mV Dropout at 200mA Output

♦ Low 120µA No-Load Supply Current

♦ Thermal-Overload and Short-Circuit Protection

♦ Reverse Battery Protection

♦ 10nA Logic-Controlled Shutdown

♦ FAULT

Indicator

♦ Small, Space-Saving µMAX Package

(1.1mm max height)

♦ Small 2.2µF Output Capacitor

Saves Space and Cost

MAX8860

Low-Dropout, 300mA

Linear Regulator in µMAX

________________________________________________________________ Maxim Integrated Products 1

1

2

3

4

8

7

6

5

FAULT

SHDN

CC

SETOUT

GND

IN

OUT

MAX8860

µMAX

TOP VIEW

Typical Operating Circuit

19-1422; Rev 1; 12/99

MAX8860EUA18

MAX8860EUA28 -40°C to +85°C

-40°C to +85°C 8 µMAX

8 µMAX

Pin Configuration

Ordering Information

Dual Mode is a trademark of Maxim Integrated Products.

MAX8860EUA33 -40°C to +85°C 8 µMAX

PART TEMP. RANGE

PIN-

PACKAGE

+1.80

+2.82

+3.30

V

OUT

(V)

+2.77MAX8860EUA27 -40°C to +85°C 8 µMAX

+2.50MAX8860EUA25 -40°C to +85°C 8 µMAX

MAX8860EUA30 -40°C to +85°C +3.008 µMAX

C2

2.2µF

OUTPUT
UP TO
300mA

FAULT­DETECT
OUTPUT

INPUT
+2.5V TO
+6.5V

C1

2.2µF

IN

MAX8860

SHDN

SET

GND

OUT

OUT

FAULT

CC

R1
100k

C3
33nF

MAX8860

Low-Dropout, 300mA
Linear Regulator in µMAX

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN= +3.6V, CCC= 33nF, 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 to GND .......................................................-7V to +7V

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

SET, CC, FAULT to GND ..........................................-0.3V to +7V

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

IN

+ 0.3V)

FAULT Sink Current ...........................................................20mA

Continuous Output Current ..............................................330mA

Output Short-Circuit Duration ....................................Continuous

Continuous Power Dissipation (T

A

= +70°C)

8-Pin µMAX (derate 4.1mW/°C above +70°C) ............330mW

Thermal Resistance (θ

JA

)

8-Pin µMAX ............................................................+244°C/W

Operating Temperature Range

MAX8860EUA_ _ ...........................................-40°C to +85°C

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

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

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

I

OUT

= 100µA to 300mA

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

OUT

= 1mA

I

OUT

= 300mA

I

OUT

= 200mA

I

OUT

= 1mA

DC average current rating

V

OUT

= 0, SHDN = GND

SET = GND

CONDITIONS

%/mA

0.0006

Load Regulation

0.0001

%/V-0.1 0.01 0.1Line Regulation

mV

155

Dropout Voltage (Note 4) 105 220

0.6

µA

0.05

Shutdown Supply Current

0.01 1

µA

165

Supply Current

120 270

3.24 3.3 3.35

V2.5 6.5Input Voltage (Note 2)

mA330 770Output Current Limit

mA300Maximum Output Current

1.230 1.248 1.267

UNITSMIN TYP MAXPARAMETER

V1.25 6.5

Adjustable Output Voltage
Range (Note 3)

TA= +25°C

MAX8860EUA33

TA= -40°C to +85°C 3.21 3.38

TA= +25°C

MAX8860EUA30

TA= -40°C to +85°C 2.92 3.08

2.95 3.00 3.05

TA= +25°C

MAX8860EUA28

TA= -40°C to +85°C 2.75 2.90

2.78 2.82 2.87

I

OUT

= 0

I

OUT

= 300mA

TA= +25°C

TA= +85°C

SET = OUT

SET = GND

SET Threshold Voltage V

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

OUT

= 1mA

1.220 1.275

TA= +25°C

TA= -40°C to +85°C

100µA < I

OUT

< 300mA,
VIN= V

OUT

+1V,

SET = GND

TA= +25°C

MAX8860EUA25

TA= +25°C

MAX8860EUA27

TA= -40°C to +85°C

TA= -40°C to +85°C

2.70 2.84

2.43 2.57

2.73 2.77 2.81

2.46 2.50 2.54

TA= +25°C

VOutput Voltage

MAX8860EUA18

TA= -40°C to +85°C 1.755 1.845

1.77 1.80 1.83

MAX8860

Low-Dropout, 300mA

Linear Regulator in µMAX

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VIN= +3.6V, CCC= 33nF, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)

Note 1: Specifications to -40°C are guaranteed by design and not production tested.
Note 2: Guaranteed by line-regulation test.
Note 3: Adjustable mode only.
Note 4: 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. Since the

minimum input voltage is 2.5V, this is applicable only for voltages of 2.5V or higher.

Note 5: The FAULT detection voltage is the difference from input to output voltage. Maintain the input above this level to ensure

good line and load regulation.

C

OUT

= 10µF, V

OUT

to 90% of final value

VIN= +2.5V, I

SINK

= 2mA

SHDN = GND or IN

V

SET

= +1.3V

CONDITIONS

µs120Start-Up Time

°C20Thermal Shutdown Hysteresis

°C170Thermal Shutdown Temperature

nA

0.01 100

0.01 100

V0.25

FAULT Output Low Voltage

nA

0.5

SHDN Input Bias Current

0.01 2.5
nA

0.5

SET Input Leakage Current (Note 3)

UNITSMIN TYP MAXPARAMETER

TA= +25°C

TA= +85°C

60

65

TA= +25°C

TA= +85°C

SET = GND, I

OUT

= 200mA mV130 280

FAULT Detection Voltage (Note 5)

Typical Operating Characteristics

(VIN= V

OUT

+ 0.5V, CIN= C

OUT

= 2.2µF, CCC= 33nF, TA= +25°C, unless otherwise noted.)

-0.4

-0.2

0

0.2

0.4

NORMALIZED OUTPUT VOLTAGE

vs. LOAD CURRENT

MAX8860 toc01

LOAD CURRENT (mA)

OUTPUT VOLTAGE (%)

0 150 20050 100 250 300

V

OUT

NORMALIZED AT I

OUT

= 0

-0.3

-0.1

-0.2

0

0.2

0.1

0.3

NORMALIZED OUTPUT VOLTAGE

vs. TEMPERATURE

MAX8860 toc02

TEMPERATURE (°C)

OUTPUT VOLTAGE (%)

-40 20 40-20 0 60 80

I

OUT

= 0

I

OUT

= 100mA

I

OUT

= 200mA

V

OUT

NORMALIZED AT +25°C, I

OUT

= 0

0

40

120

100

80

60

20

160

140

200

180

0 10050 150 200 250 300

SUPPLY CURRENT vs. LOAD CURRENT

MAX8860 toc03

LOAD CURRENT (mA)

SUPPLY CURRENT (µA)

TA = +85°C

TA = +25°C

TA = -40°C

V

FAULT

= +3.6V

0.5

FAULT Output Off-Leakage Current

TA= +25°C

TA= +85°C

VIL, 2.5V ≤ VIN≤ 5.5V

VIH, 2.5V ≤ VIN≤ 5.5V

V0.4

V2.0

SHDN Input Threshold

C

OUT

= 2.2µF

C

OUT

= 10µF

I

OUT

= 10mA,

10Hz < f < 100kHz

C

OUT

= 100µF

10Hz < f < 100kHz, C

OUT

= 10µF

µV

RMS

190

55

Output Voltage Noise

nV√Hz

Output Voltage Noise Density