Maxim MAX8866TEUA, MAX8865REUA, MAX8865SEUA, MAX8865TEUA, MAX8866REUA Datasheet

19-0485; Rev 0; 4/96

Dual, Low-Dropout, 100mA Linear Regulators

_______________General Description

The MAX8865 and MAX8866 dual, low-dropout linear
regulators operate from a +2.5V to +5.5V input range
and deliver up to 100mA. At 200mA total load, the
PMOS pass transistors keep the supply current at
145µA, 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 voltages are 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 external resistor dividers. Other
features include independent low-power shutdown,
short-circuit protection, thermal shutdown protection,
and reverse battery protection. The MAX8866 also
includes an auto-discharge function, which actively dis­charges the selected output voltage to ground when
the device is placed in shutdown mode. Both devices
come in a miniature 8-pin µMAX 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, 105µA No-Load Supply Current
♦ Low, 145µA Operating Supply Current (even in

dropout)

♦ Low, 350µV

Output Noise

RMS

♦ Independent, Low-Current Shutdown Control
♦ Thermal Overload Protection
♦ Output Current Limit
♦ Reverse Battery Protection
♦ Dual Mode Operation: Fixed or Adjustable (1.25V

to 5.5V) Outputs

______________Ordering Information

PART

MAX8865TEUA

MAX8865SEUA
MAX8865REUA -40°C to +85°C 8 µMAX 2.80
MAX8866TEUA
MAX8866SEUA -40°C to +85°C 8 µMAX 2.84
MAX8866REUA -40°C to +85°C 8 µMAX 2.80

TEMP. RANGE

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C

PIN-

PACKAGE

8 µMAX
8 µMAX

8 µMAX

PRESET
V

(V)

OUT

3.15

2.84

3.15

MAX8865T/S/R, MAX8866T/S/R

__________Typical Operating Circuit

OUTPUT



VOLTAGE 1
OUTPUT

VOLTAGE 2

C

OUT2

1µF



OUT1

MAX8865
MAX8866

OUT2

C
1µF

OUT1

IN

C

IN

BATTERY

SHDN2

Dual Mode is a trademark of Maxim Integrated Products.

2µF

SHDN1
SHDN2
GND SET2SET1

________________________________________________________________

__________________Pin Configuration

TOP VIEW

OUT1

GND

OUT2

1
2

IN

MAX8865

3

MAX8866

4

µMAX

Maxim Integrated Products

8

SET1
SHDN1

7

SHDN2

6
5

SET2

1

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

Dual, Low-Dropout, 100mA Linear Regulators

ABSOLUTE MAXIMUM RATINGS

VINto GND ..................................................................-6V to +6V

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

SET_ to GND ............................................................-0.3V to +6V

SHDN_ _ to GND............................................................-6V to +6V

SHDN_ _ to IN .............................................................-6V to +0.3V

OUT_ to GND...............................................-0.3V to (V

Continuous Power Dissipation (T

= +70°C)

A

+ 0.3V)

IN

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

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.

ELECTRICAL CHARACTERISTICS

(VIN= +3.6V, GND = 0V, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

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

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

Thermal Resistance (θ

)...............................................244°C/W

JA

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

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

CONDITIONS

Input Voltage (Note 1)

Output Voltage

Adjustable Output Voltage
Range (Note 2)

Current Limit (Note 3)
Ground Pin Current

Dropout Voltage (Note 4)

MAX8865T/S/R, MAX8866T/S/R

Line Regulation

Load Regulation

Output Voltage Noise

V

∆V

IN

OUT_

OUT_

LIM

Q

LNR

LDR

0mA ≤ I

OUT

SET_ = GND

SET_ = GND µAI
I

= 1mA

OUT

I

= 50mA

OUT

≤ 50mA,

MAX886_T
MAX886_S 2.77 2.84 2.91
MAX886_R

I

= 0mA

OUT_

I

= 50mA

OUT_

3.08 3.15 3.24

2.73 2.80 2.87

SET_

105 270
145

1.1
55 120

VIN= 2.5V to 5.5V, SET_ tied to OUT_,
I

= 1mA

OUT_

I

= 0mA to 50mA %/mA

OUT_

10Hz to 1MHz

SET_ = GND
SET_ tied to OUT_
C

= 1µF

OUT

C

= 100µF

OUT

0.012 0.03

0.006
350
220

SHUTDOWN

SHDN Input Threshold
SHDN Input Bias Current

Shutdown Supply Current V

IH
IL

SHDN_ _

Q SHDN

Shutdown to Output
Discharge Delay (MAX8866)

V

SHDN_ _

OUT_

C

= 1µF, no load

OUT

= V

= 0V

IN

2.0V

0 1000I

0.16 3000 nAI

SET INPUT

1.222 1.25 1.276V

0.015 50I

SET Input Leakage Current
(Note 2)

SET_

SET_

VIN= 2.5V to 5.5V, I
V

= 1.3V

SET_

= 1mASET Reference Voltage (Note 2) V

OUT_

THERMAL PROTECTION

Thermal Shutdown Temperature °C
Thermal Shutdown Hysteresis °C

SHDN

SHDN

170T

20∆T

UNITSMIN TYP MAXSYMBOLPARAMETER

V2.5 5.5V

V

5.5V

VV

mA100Maximum Output Current
mA220I

mV

%/V-0.10 0 0.10∆V

µV

RMS

0.4V

V

nA

ms1

nA

2 _______________________________________________________________________________________

Dual, Low-Dropout, 100mA Linear Regulators

ELECTRICAL CHARACTERISTICS

(VIN= +3.6V, GND = 0V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 5)

CONDITIONS

Input Voltage (Note 1)

Output Voltage

Adjustable Output Voltage
Range (Note 2)

Current Limit (Note 3)
Ground Pin Current

Dropout Voltage (Note 4)

Line Regulation

Load Regulation

Output Voltage Noise

SHUTDOWN

SHDN Input Threshold

SHDN Input Bias Current

Shutdown Supply Current
Shutdown to Output

Discharge Delay (MAX8866)

SET INPUT

SET Input Leakage Current
(Note 2)

THERMAL PROTECTION

Thermal Shutdown Temperature °C
Thermal Shutdown Hysteresis °C

Note 1: Guaranteed by line regulation test.
Note 2: Adjustable mode only.
Note 3: Not tested. For design purposes, the current limit should be considered 120mA minimum to 320mA maximum.
Note 4: The dropout voltage is defined as (V
Note 5: Specifications to -40°C are guaranteed by design and not production tested.

IN

V

OUT_

OUT_

I

LIM

Q

LNR

∆V

LDR

IH
IL

I

SHDN_ _

Q SHDN

V

SET_

I

SET_

SHDN

∆T

SHDN

0mA ≤ I

OUT

≤ 50mA,

SET_ = GND

SET_ = GNDI
I

= 1mA

OUT

I

= 50mA

OUT

VIN= 2.5V to 5.5V,
SET_ tied to OUT_, I

I

= 0mA to 50mA

OUT_

10Hz to 1MHz

V
V

C

SHDN_ _

OUT_

OUT

= V

= 0V

= 1µF

IN

VIN= 2.5V to 5.5V, I
V

= 1.3V

SET_

- V

OUT_

) when V

IN_

MAX886_T
MAX886_S 2.74 2.84 2.93
MAX886_R

I

= 0mA

OUT_

I

= 50mA

OUT_

= 1mA

OUT_

SET_ = GND
SET_ tied to OUT_
C

= 1µF

OUT

C

= 100µF

OUT

= 1mASET Reference Voltage (Note 2)

OUT_

is 100mV below the value of V

OUT_

3.05 3.15 3.26

2.70 2.80 2.89

SET_

5.5V

220
105 270
145

1.1
55 120

0.012 0.03

0.006
350
220

2.0V

0.4V

0 1000

0.16 3000

1.207 1.25 1.288

0.015 50

170T

20

OUT_

for V

IN_

= V

OUT_

+2V.

UNITSMIN TYP MAXSYMBOLPARAMETER

V2.5 5.5V

V

VV

mA80Maximum Output Current
mA

µA

mV

%/V-0.11 0 0.11∆V

%/mA

µV

RMS

V

nA
nAI

ms1

V

nA

MAX8865T/S/R, MAX8866T/S/R

_______________________________________________________________________________________

3

Dual, Low-Dropout, 100mA Linear Regulators

__________________________________________Typical Operating Characteristics

(V

= +3.6V, CIN= 2µF, C

IN

= 1µF, SHDN2 = GND, MAX886_S, TA= +25°C, unless otherwise noted.)

OUT

OUTPUT VOLTAGE 

vs. LOAD CURRENT

3.00
V

OUT1

2.95

2.90

2.85

2.80

OUTPUT VOLTAGE (V)

2.75

2.70

0203010 60 70 100

40 50 80 90

LOAD CURRENT (mA)

MAX8865/66-01

180

160

140

120

100

SUPPLY CURRENT (µA)

80

60

02010 60 70 100

SUPPLY CURRENT 

vs. INPUT VOLTAGE

MAX8865/66-04

200
180
160
140
120
100

80
60

SUPPLY CURRENT (µA)

40
20

0

01 4 6

100

ONE REGULATOR ENABLED, NO LOAD

90
80
70
60

MAX8865T/S/R, MAX8866T/S/R

50
40
30

SUPPLY CURRENT (µA)

20
10

0

01 4 6

23 5

INPUT VOLTAGE (V)

I

LOAD1 =

I

LOAD1

50mA

= 0mA

SUPPLY CURRENT 

vs. LOAD CURRENT

SHDN2 = VIN, I

SHDN2 = GND

30 40 50 80 90

LOAD CURRENT (mA)

TOTAL SUPPLY CURRENT 

vs. INPUT VOLTAGE

SHDN1 = SHDN2 = V

I

IN

= I

LOAD1

LOAD2 =

I

23 5

INPUT VOLTAGE (V)

LOAD1

LOAD2

50mA

= I

LOAD2

= 50mA

= 0mA

3.5

3.0

MAX8865/66-02

2.5

2.0

1.5

OUTPUT VOLTAGE (V)

1.0

0.5

0

3.0

MAX8865/66-05

2.9

2.8

OUTPUT VOLTAGE (V)

2.7

-40 -20 40 80

OUTPUT VOLTAGE 

vs. INPUT VOLTAGE

V

OUT1

NO LOAD

01 4 6

23 5

INPUT VOLTAGE (V)

MAX8865/66-03

OUTPUT VOLTAGE 

vs. TEMPERATURE

MAX8865/66-06

020 60

TEMPERATURE (°C)

SUPPLY CURRENT

vs. TEMPERATURE

180

160

SHDN2 = V
I

140

120

100

SUPPLY CURRENT (µA)

SHDN2 = GND
I

80

60

-40 -20 40 80

LOAD1

LOAD1

= I

= 50mA

IN

= 50mA

LOAD2



020 60

TEMPERATURE (°C)

140

120

MAX8865/66-07

100

80

60

40

DROPOUT VOLTAGE (mV)

20

0

0 20 60 100

DROPOUT VOLTAGE
vs. LOAD CURRENT

TA = +85°C

TA = +25°C

40 8010 30 7050 90

LOAD CURRENT (mA)

TA = -40°C

MAX8865/66-08

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

80

V

= 2.84V

OUT

70

= 55Ω

R

L

60
50
40

PSRR (dB)

30
20
10

0

0.100.01
FREQUENCY (kHz)

4 _______________________________________________________________________________________

C

OUT

C

OUT

110

= 10µF

= 1µF

100 1000



MAX8865/66-09