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_______________General Description
The MAX8867/MAX8868 low-noise, low-dropout linear
regulators operate from a 2.5V to 6.5V input and deliver
up to 150mA. Typical output noise for these devices is
just 30V
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. The
MAX8867 and MAX8868 are pin-compatible with the
MAX8863 and MAX8864, except for the BP pin.
Designed with an internal P-channel MOSFET pass
transistor, the MAX8867/MAX8868 maintain a low
100A supply current, independent of the load current
and dropout voltage. Other features include a 10nA
logic-controlled shutdown mode, short-circuit and ther-
mal-shutdown protection, and reverse battery protec-
tion. The MAX8868 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
Modems
Cordless Telephones
Hand-Held Instruments
PCS Telephones
Palmtop Computers
PCMCIA Cards
Electronic Planners
____________________________Features
o
Low Output Noise: 30V
RMS
o
Low 55mV Dropout at 50mA Output
(165mV at 150mA output)
o
Low 85A No-Load Supply Current
o
Low 100A Operating Supply Current
(even in dropout)
o
Thermal-Overload and Short-Circuit Protection
o
Reverse Battery Protection
o
Output Current Limit
o
Preset Output Voltages (1.4% accuracy)
o
10nA Logic-Controlled Shutdown
MAX8867/MAX8868
Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23
________________________________________________________________
Maxim Integrated Products
1
GND
OUT
IN
1
5
BP
SHDN
MAX8867
MAX8868
SOT23-5
TOP VIEW
2
3
4
__________________Pin Configuration
19-1302; Rev 1; 3/98
PART**
MAX8867
C/Dxy
MAX8867EUKxy-T
MAX8868
C/Dxy
0C to +70C
-40C to +85C
0C to +70C
TEMP. RANGE
PIN-PACKAGE
Dice*
5 SOT23-5
Dice*
______________Ordering Information
___Expanded Ordering Information
*
Dice are tested at T
A
= +25C.
**
xy is the output voltage code (see Expanded Ordering
Information table).
***
Other xy between 2.5V and 5.0V are available in 100mV incre-
ments. Contact factory for other versions. Minimum order
quantity is 25,000 units.
MAX8868EUKxy-T
-40C to +85C
5 SOT23-5
PRESET
OUTPUT
VOLTAGE
(V)
MAX886_EUK25
2.50
OUTPUT
VOLTAGE (xy)
CODE
ACAY
SOT TOP MARK
ACBF
MAX8867
MAX8868
MAX886_EUK28
2.80
ACAZ
ACBG
MAX886_EUK29
2.84
ACBA
ACBH
MAX886_EUK30
3.00
ACBB
ACBI
MAX886_EUK32
3.15
ACBC
ACBJ
MAX886_EUK33
3.30
ACBD
ACBK
MAX886_EUK36
3.60
ACCZ
ACDA
Other xy***
x.y0
--
--
MAX886_EUK50
5.00
ACBE
ACBL
MAX8867
MAX8868
INPUT
2.5V TO 6.5V
IN
OUT
SHDN
C
BP
0.01
F
C
OUT
1
F
C
IN
1
F
OFF
ON
BP
GND
OUTPUT
PRESET
2.5V TO 5.0V
150mA
__________Typical Operating Circuit
MAX8867/MAX8868
Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= V
OUT(NOMINAL)
+ 0.5V, T
A
= -40C to +85C, unless otherwise noted. Typical values are at T
A
= +25C.) (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 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 (T
A
= +70C)
SOT23-5 (derate 7.1mW/C above +70C)...................571mW
Operating Temperature Range ...........................-40C to +85C
Junction Temperature ......................................................+150C
JB
..................................................................................140C/W
Storage Temperature Range .............................-65C to +160C
Lead Temperature (soldering, 10sec) .............................+300C
C
OUT
= 10F
C
OUT
= 100F
V
IN
= 2.5V to 5.5V
I
OUT
= 0mA, T
A
= +25C
2.0
f = 10Hz to 100kHz,
C
BP
= 0.01F
T
A
= +25C
0.01
1
T
A
= +85C
I
OUT
= 0mA to 120mA, C
OUT
= 1F
No load
I
OUT
= 150mA
V
OUT
= 0V
I
OUT
= 150mA
V
IN
= 2.5V to 5.5V
CONDITIONS
T
A
= +25C
A
V
0.01
100
V
IH
0.4
SHDN Input Threshold
I
Q, SHDN
0.2
Shutdown Supply Current
T
A
= +25C
T
A
= +85C
V
SHDN
= V
IN
nA
I
SHDN
0.5
SHDN Input Bias Current
V
IL
300
MAX8868 only
Shutdown Discharge
Resistance
mA
150
Maximum Output Current
-1.4
1.4
V
2.5
6.5
V
IN
Input Voltage (Note 2)
V
RMS
20
e
n
30
Output Voltage Noise
%/mA
0.01
0.04
V
LDR
Load Regulation
mA
160
390
I
LIM
Current Limit
I
OUT
= 1mA
85
180
I
OUT
= 50mA
Ground Pin Current
A
100
I
Q
1.1
165
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
Dropout Voltage (Note 2)
mV
55
120
30
150
T
A
= -40C to +85C
C
BP
= 0.1F,
C
OUT
= 1F, no load
s
300
Shutdown Exit Delay
(Note 3)
V
IN
= (V
OUT
+ 0.1V) to 6.5V, I
OUT
= 1mA
%/V
-0.15
0
0.15
V
LNR
Line Regulation
I
OUT
= 0mA to 120mA
%
-3
2
Output Voltage Accuracy
SHUTDOWN
MAX8867/MAX8868
Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
OUT(NOMINAL)
+ 0.5V, T
A
= -40C to +85C, unless otherwise noted. Typical values are at T
A
= +25C.) (Note 1)
Note 1:
Limits are 100% production tested at T
A
= +25C. 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 V
IN
= V
OUT
+ 0.5V.
Note 3:
Time needed for V
OUT
to reach 95% of final value.
CONDITIONS
C
155
T
SHDN
Thermal Shutdown
Temperature
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
C
15
T
SHDN
Thermal Shutdown
Hysteresis
__________________________________________Typical Operating Characteristics
(V
IN
= V
OUT(NOMINAL)
+ 0.5V, C
IN
= 1F, C
OUT
= 1F, C
BP
= 0.01F, T
A
= +25C, unless otherwise noted.)
2.40
2.45
2.50
2.55
2.60
0
50
100
150
MAX886_EUK25
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX8867/8-01
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
4.8
4.9
5.0
5.1
5.2
0
50
100
150
MAX886_EUK50
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX8867/8-02
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
60
70
65
85
80
75
100
95
90
110
105
0
50
100
150
GROUND PIN CURRENT
vs. LOAD CURRENT
MAX8867/8-03
LOAD CURRENT (mA)
GROUND PIN CURRENT (
A)
MAX886_EUK50
MAX886_EUK25
THERMAL PROTECTION
0
20
60
40
80
100
120
0
2
1
3
5
4
6
MAX886_EUK25
GROUND PIN CURRENT vs. INPUT VOLTAGE
MAX8867/8-04
INPUT VOLTAGE (V)
GROUND PIN CURRENT (
A)
I
LOAD
= 50mA
NO LOAD
0
20
60
40
80
100
120
0
2
1
3
5
4
6
MAX886_EUK50
GROUND PIN CURRENT vs. INPUT VOLTAGE
MAX8867/8-05
INPUT VOLTAGE (V)
GROUND PIN CURRENT (
A)
I
LOAD
= 50mA
NO LOAD
0
1
3
2
4
5
6
0
2
1
3
5
4
6
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX8867/8-06
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
MAX886_EUK50
MAX886_EUK25
10
0.01
0.1
1
10
100
1000
OUTPUT NOISE SPECTRAL DENSITY
vs. FREQUENCY
MAX8867/8-13
FREQUENCY (kHz)
OUTPUT NOISE SPECTRAL DENSITY (
V/
Hz)
0.1
1
C
OUT
= 1
F
C
BP
= 0.01
F
I
LOAD
= 10mA
C
OUT
= 10
F
80
0
0.001
0.01
0.1
OUTPUT NOISE vs. BP CAPACITANCE
20
10
MAX8867/8-14
BP CAPACITANCE (
F)
OUTPUT NOISE (
V
RMS
)
30
50
60
40
70
MAX886_EUK50
C
OUT
= 10
F
I
LOAD
= 10mA
f = 10Hz TO 100kHz
MAX886_EUK30
MAX886_EUK25
60
0
1
10
100
OUTPUT NOISE vs. LOAD CURRENT
20
10
40
30
50
MAX8867/8-15
LOAD CURRENT (mA)
OUTPUT NOISE (
V
RMS
)
MAX886_EUK50
C
OUT
= 10
F
C
BP
= 0.01
F
f = 10Hz TO 100kHz
MAX886_EUK30
MAX886_EUK25
MAX8867/MAX8868
Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23
4
_______________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)
(V
IN
= V
OUT(NOMINAL)
+ 0.5V, C
IN
= 1F, C
OUT
= 1F, C
BP
= 0.01F, T
A
= +25C, unless otherwise noted.)
2.40
2.50
2.45
2.55
2.60
-40
0
-20
20
80
40
60
100
MAX886_EUK25
OUTPUT VOLTAGE vs. TEMPERATURE
MAX8867/8-07
TEMPERATURE (C)
OUTPUT VOLTAGE (V)
I
LOAD
= 50mA
0
100
50
200
150
250
0
40
20
60
80
140
100 120
160
MAX886_EUK25
DROPOUT VOLTAGE vs. LOAD CURRENT
MAX8867/8-10
LOAD CURRENT (mA)
DROPOUT VOLTAGE (mV)
T
A
= +85C
T
A
= -40C
T
A
= +25C
4.80
5.00
4.90
5.10
5.20
-40
0
-20
20
80
40
60
100
MAX886_EUK50
OUTPUT VOLTAGE vs. TEMPERATURE
MAX8867/8-08
TEMPERATURE (C)
OUTPUT VOLTAGE (V)
I
LOAD
= 50mA
0
100
80
40
20
60
160
140
120
200
180
-40
0
-20
20
80
40
60
100
GROUND PIN CURRENT vs. TEMPERATURE
MAX8867/8-09
TEMPERATURE (C)
GROUND PIN CURRENT (
A)
MAX886_EUK50
I
LOAD
= 50mA
MAX886_EUK25
0
100
50
150
200
0
40
20
60
80
140
100 120
160
MAX886_EUK50
DROPOUT VOLTAGE vs. LOAD CURRENT
MAX8867/8-11
LOAD CURRENT (mA)
DROPOUT VOLTAGE (mV)
T
A
= +85C
T
A
= -40C
T
A
= +25C
70
0
0.01
0.1
1
100
10
1000
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
10
20
MAX8867/8-12
FREQUENCY (kHz)
PSRR (dB)
30
50
40
60
C
OUT
= 1
F
I
LOAD
= 50mA
C
BP
= 0.1
F
C
OUT
= 10
F
MAX8867/MAX8868
Low-Noise, Low-Dropout,
150mA Linear Regulators in SOT23
_______________________________________________________________________________________
5
1ms/div
C
OUT
= 10
F, C
BP
= 0.1
F, I
LOAD
= 10mA
MAX886_EUK25
10Hz TO 100kHz OUTPUT NOISE
V
OUT
50
V/div
MAX8867/8-16
3.01V
3.00V
2.99V
50mA
0mA
V
OUT
I
LOAD
MAX886_EUK30, V
IN
= V
OUT
+ 0.5V,
C
IN
= 10
F, I
LOAD
= 0mA TO 50mA
10
s/div
LOAD-TRANSIENT RESPONSE
MAX8867/8-19
100
0.01
0
80
100
120
20
40
60
140
REGION OF STABLE C
OUT
ESR
vs. LOAD CURRENT
0.1
MAX8867/8-17
LOAD CURRENT (mA)
C
OUT
ESR (
)
1
10
STABLE REGION
C
OUT
= 1
F
C
OUT
= 10
F
3.01V
3.00V
2.99V
50mA
0mA
V
OUT
I
LOAD
MAX886_EUK30, V
IN
= V
OUT
+ 0.1V,
C
IN
= 10
F, I
LOAD
= 0mA TO 50mA
10
s/div
LOAD-TRANSIENT RESPONSE
NEAR DROPOUT
MAX8867/8-20
____________________________Typical Operating Characteristics (continued)
(V
IN
= V
OUT(NOMINAL)
+ 0.5V, C
IN
= 1F, C
OUT
= 1F, C
BP
= 0.01F, T
A
= +25C, unless otherwise noted.)
4V
3V
3.001V
2.999V
V
OUT
MAX886_EUK30, I
LOAD
= 50mA
100
s/div
LINE-TRANSIENT RESPONSE
MAX8867/8-18
V
IN
V
OUT
V
SHDN
NO LOAD
500
s/div
MAX8868
ENTERING SHUTDOWN
MAX8867/8-25
2V
0V
0V
1V
0V
0V
2V
2V
5
s/div
MAX886_EUK25
SHUTDOWN EXIT DELAY
MAX8867-21
I
LOAD
= 50mA
V
SHDN
V
OUT
C
BP
= 0.01
F
C
BP
= 0.1
F
0V
0V
4V
2V
2V
5
s/div
MAX886_EUK50
SHUTDOWN EXIT DELAY
MAX8867-23
I
LOAD
= 50mA
V
SHDN
V
OUT
C
BP
= 0.01
F
C
BP
= 0.1
F
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