Maxim MAX8877EUK36-T Datasheet

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__________________General Description

The MAX8877/MAX8878 low-noise, low-dropout linear
regulators operate from a 2.5V to 6.5V input and deliver
up to 150mA. These devices are pin-compatible with
the industry-standard ‘2982 and offer an improved
dropout voltage. Typical output noise is 30µV

RMS

, and
typical dropout is only 165mV at 150mA. The output
voltage is preset to voltages in the range of 2.5V to

5.0V, in 100mV increments.
Designed with an internal P-channel MOSFET pass

transistor, the MAX8877/MAX8878 maintain a low
100µA supply current, independent of the load current
and dropout voltage. Other features include a 10nA
logic-controlled shutdown mode, short-circuit and ther­mal-shutdown protection, and reverse battery protec­tion. The MAX8878 also includes an auto-discharge
function, which actively discharges the output voltage
to ground when the device is placed in shutdown. Both
devices come in a miniature 5-pin SOT23 package.

________________________Applications

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

____________________________Features

♦ Pin-Compatible with the Industry-Standard ‘2982
♦ Low Output Noise: 30µV

RMS

♦ Low 55mV Dropout at 50mA Output

(165mV at 150mA output)

♦ Low 85µA No-Load Supply Current
♦ Low 100µA Operating Supply Current

(even in dropout)

♦ Thermal-Overload and Short-Circuit Protection
♦ Reverse Battery Protection
♦ Output Current Limit
♦ Preset Output Voltages (±1.4% Accuracy)
♦ 10nA Logic-Controlled Shutdown

MAX8877/MAX8878

Low-Noise, Low-Dropout, 150mA Linear

Regulators with ‘2982 Pinout

________________________________________________________________

Maxim Integrated Products

1

GND

BP

SHDN

1

5

OUT

IN

MAX8877
MAX8878

SOT23-5

TOP VIEW

2

3

4

_____________________Pin Configuration

MAX8877
MAX8878

INPUT

2.5V TO 6.5V
IN OUT

SHDN
BP

GND

OUTPUT
PRESET

2.5V TO 5.0V
150mA

C

BP

0.01µF

C

OUT

1µF

C

IN

1µF

OFF

ON

____________Typical Operating Circuit

19-1301; Rev 1; 3/98

PART**

MAX8877C/Dxy

MAX8877EUKxy-T
MAX8878C/Dxy

0°C to +70°C

-40°C to +85°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

Dice*
5 SOT23-5
Dice*

_________________Ordering Information

*

Dice are tested at TA= +25°C only.

**

xy is the output voltage code (see Expanded Ordering
Information table at end of data sheet).

MAX8878EUKxy-T -40°C to +85°C 5 SOT23-5

MAX8877/MAX8878

Low-Noise, Low-Dropout, 150mA Linear
Regulators with ‘2982 Pinout

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VIN= V

OUT(NOMINAL)

+ 0.5V, 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.

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

correlation using Statistical Quality Control (SQC) Methods.

Note 2: 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

+ 0.5V.

Note 3: Time needed for V

OUT

to reach 95% of final value.

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

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

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

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

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

IN

+ 0.3V)

Continuous Power Dissipation (TA= +70°C)

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

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

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

θ

JB

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

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

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

MAX8878 only

CBP= 0.1µF
C

OUT

= 1µF, no load

I

OUT

= 0mA, TA= +25°C

V

OUT

= 0V

V

SHDN

= V

IN

VIN= 2.5V to 5.5V

I

OUT

= 0mA to 120mA, C

OUT

= 1µF

VIN= 2.5V to 5.5V

I

OUT

= 150mA

I

OUT

= 50mA

No load
I

OUT

= 150mA

I

OUT

= 1mA

f = 10Hz to 100kHz,
CBP= 0.01µF

CONDITIONS

Ω300Resistance Shutdown Discharge

300

µs

30 150

Shutdown Exit Delay
(Note 3)

0.2

µA

0.01 1

I

Q(SHDN)

Shutdown Supply Current

0.5

nA

0.01 100

I

SHDN

SHDN Input Bias Current

0.4V

IL

V

2.0V

IH

SHDN Input Threshold

20

µV

RMS

30

e

n

Output Voltage Noise

mA150Maximum Output Current

-1.4 1.4

V2.5 6.5V

IN

Input Voltage

%/mA0.01 0.04∆V

LDR

Load Regulation

165

55 120

mA160 390I

LIM

Current Limit

µA

85 180

I

Q

Ground Pin Current

100

mV

1.1

Dropout Voltage (Note 2)

UNITSMIN TYP MAXSYMBOLPARAMETER

TA= -40°C to +85°C

TA= +25°C

TA= +85°C

TA= +25°C

TA= +85°C

TA= +25°C

C

OUT

= 100µF

C

OUT

= 10µF

°C155T

SHDN

Thermal Shutdown Temperature

°C15∆T

SHDN

Thermal Shutdown Hysteresis

I

OUT

= 0mA to 120mA, TA= -40°C to +85°C

%

-3 2

Output Voltage Accuracy

VIN= (V

OUT

+ 0.1V) to 6.5V, I

OUT

= 1mA %/V-0.15 0 0.15∆V

LNR

Line Regulation

SHUTDOWN

THERMAL PROTECTION

MAX8877/MAX8878

Low-Noise, Low-Dropout, 150mA Linear

Regulators with ‘2982 Pinout

_______________________________________________________________________________________

3

2.40

2.45

2.50

2.55

2.60

0 50 100 150

OUTPUT VOLTAGE vs. LOAD CURRENT

(MAX887_EUK25)

MAX8877-01

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

4.8

4.9

5.0

5.1

5.2

0 50 100 150

OUTPUT VOLTAGE vs. LOAD CURRENT

(MAX887_EUK50)

MAX8877-02

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

60

65

70

75

80

85

90

95

100

105

110

0 50 100 150

GROUND PIN CURRENT

vs. LOAD CURRENT

MAX8877-03

LOAD CURRENT (mA)

GROUND PIN CURRENT (µA)

MAX887_EUK50

MAX887_EUK25

0

40

20

80

60

100

120

0 2 31 4 5 6

GROUND PIN CURRENT vs. INPUT VOLTAGE

(MAX887_EUK25)

MAX8877-04

INPUT VOLTAGE (V)

GROUND PIN CURRENT (µA)

NO LOAD

I

LOAD

= 50mA

2.40

2.45

2.50

2.55

2.60

-40 40200-20 60 80 100

OUTPUT VOLTAGE vs. TEMPERATURE

(MAX887_EUK25)

MAX8877-07

TEMPERATURE (°C)

OUTPUT VOLTAGE (V)

I

LOAD

= 50mA

0

40

20

80

60

100

120

0 2 31 4 5 6

GROUND PIN CURRENT vs. INPUT VOLTAGE

(MAX887_EUK50)

MAX8877-05

INPUT VOLTAGE (V)

GROUND PIN CURRENT (µA)

NO LOAD

I

LOAD

= 50mA

0

2

1

4

3

5

6

0 2 31 4 5 6

OUTPUT VOLTAGE vs. INPUT VOLTAGE

MAX8877-06

INPUT VOLTAGE (V)

OUTPUT VOLTAGE (V)

MAX887_EUK25

NO LOAD

MAX887_EUK50

4.8

4.9

5.0

5.1

5.2

-40 40200-20 60 80 100

OUTPUT VOLTAGE vs. TEMPERATURE

(MAX887_EUK50)

MAX8877-08

TEMPERATURE (°C)

OUTPUT VOLTAGE (V)

I

LOAD

= 50mA

0

60
40
20

100

80

180
160
140
120

200

-40 -20 0 20 40 60 80 100

GROUND PIN CURRENT

vs. TEMPERATURE

MAX8877-09

TEMPERATURE (°C)

GROUND PIN CURRENT (µA)

MAX887_EUK50

MAX887_EUK25

I

LOAD

= 50mA

__________________________________________Typical Operating Characteristics

(VIN= V

OUT(NOMINAL)

+ 0.5V, CIN= 1µF, C

OUT

= 1µF, CBP= 0.01µF, TA= +25°C, unless otherwise noted.)