MP8801
Low Dropout
150mA Linear Regulator
The Future of Analog IC Technology
DESCRIPTION
The MP8801 is a low-noise, low-dropout linear
regulator. It operates from a 2.7V to 6.5V input
voltage and regulates the output voltage with
2% accuracy at 2.5V, 2.85V or 3.3V. The
internally set output voltage may be overridden
with an external resistor divider from 1.25V to
5V.
The MP8801 can supply up to 150mA of load
current. The MP8801 features thermal overload
protection and is available in a 5-pin TSOT23-5
package.
FEATURES
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o
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Low 100mV Dropout at 100mA Output
2% Accurate Output Voltage
Fixed Output Voltage Options of 2.5V,
2.85V or 3.3V
Adjustable Output Voltage from 1.25V
to 5V using an External Resistor Divider
Up to 6.5V Input Voltage
High PSRR
70dB at 1kHz
30dB at 1MHz
Better
Than
0.001%/mA
Load
Regulation
Stable With Low-ESR Output Capacitor
Low 125μA Ground Current
Internal Thermal Protection
802.11 PC Cards
Mobile Handset PLL Power
Audio Codec Power
FIXED VOLTAGE PART NUMBERS
Part Number
MP8801DJ
–
2.5
MP8801DJ
–
2.85
MP8801DJ
–
3.3
Output Voltage
2.5V
2.85V
3.3V
APPLICATIONS
EVALUATION BOARD REFERENCE
Board Number
EV8801DJ-00A
*
Output*
2.85V
Dimensions
2.0”X x 2.0”Y x 0.4”Z
Default output voltage adjustable from 1.25V to 5.0V using an
external resistor divider.
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“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
V
IN
2.7V to 6.5V
1
IN
OUT
5
160
V
DROPOUT
vs I
LOAD
OUTPUT
1.5V to 5V
140
MP8801DJ-X.X
V
IN
3
EN
GND
FB
4
R1
V
DROPOUT
(mV)
120
100
80
60
40
20
0
0
20 40 60 80 100 120 140 160
I
LOAD
(mA)
2
EN (Pin3)
may be connected
to IN (Pin 1) directly
The sum of
R1 and R2
R2
should not
exceed 100k
MP8801 Rev. 1.9
10/10/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
1
MP8801 – LOW DROPOUT, 150mA LINEAR REGULATOR
ORDERING INFORMATION
Part Number*
MP8801DJ–2.5
MP8801DJ–2.85
MP8801DJ–3.3
Package
TSOT23-5
Top Marking
Free Air Temperature (T
A
)
-40°C to +85°C
* For Tape & Reel, add suffix –Z (g. MP8801DJ–2.85–Z).
For RoHS compliant packaging, add suffix –LF (e.g. MP8801DJ–2.85–LF–Z)
PACKAGE REFERENCE
TOP VIEW
IN
GND
EN
1
2
3
5
OUT
MARKING
4
FB
ABSOLUTE MAXIMUM RATINGS
(1)
IN Supply Voltage ........................-0.3V to +7.0V
FB Voltage ......................... -0.3V to V
OUT
+ 0.3V
All Other Pins ..................................-0.3V to +6V
(2)
Continuous Power Dissipation (T
A
= +25°C)
………………………………………………...0.56W
Junction Temperature ...............................150°C
Lead Temperature ....................................260°C
Storage Temperature ............. –65°C to +150°C
Thermal Resistance
(4)
TSOT23-5 ..............................220 .... 110 ..
°C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The maximum allowable power dissipation is a function of the
maximum junction temperature T
J
(MAX), the junction-to-
ambient thermal resistance
θ
JA
, and the ambient temperature
T
A
. The maximum allowable continuous power dissipation at
any ambient temperature is calculated by P
D
(MAX) = (T
J
(MAX)-T
A
)/θ
JA
. Exceeding the maximum allowable power
dissipation will cause excessive die temperature, and the
regulator will go into thermal shutdown. Internal thermal
shutdown circuitry protects the device from permanent
damage.
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on approximately 1” square of 1 oz copper
θ
JA
θ
JC
Recommended Operating Conditions
(3)
Input Voltage...................................2.7V to 6.5V
Output Voltage .................................1.25V to 5V
Load Current ...........................150mA Maximum
Maximum Junction Temp. (T
J
) ................+125°C
MP8801 Rev. 1.9
10/10/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
2
MP8801 – LOW DROPOUT, 150mA LINEAR REGULATOR
ELECTRICAL CHARACTERISTICS
V
IN
= 5V, T
A
= +25°C, unless otherwise noted.
Parameter
Operating Voltage
Ground Pin Current
Shutdown Current
FB Regulation
Symbol Condition
I
OUT
= 1mA
I
OUT
= 1mA–150mA
V
EN
= 0V, V
IN
= 5V
Adjustable
2.5V
Output Voltage Accuracy
2.85V
3.3V
Dropout Voltage
(6)
Line Regulation
Load Regulation
PSRR
Output Voltage Noise
EN Input High Voltage
EN Input Low Voltage
EN Input Bias Current
Thermal Protection
(5)
Thermal Protection Hysteresis
(5)
I
OUT
= 150mA
-40°C≤T
A
≤85°C
-40°C≤T
A
≤85°C
-40°C≤T
A
≤85°C
-40°C≤T
A
≤85°C
V
OUT
= 3V
V
OUT
= 4V
Min
2.7
1.197
1.194
2.450
2.448
2.793
2.779
3.234
3.218
Typ
(5)
125
0.1
1.222
1.222
2.500
2.500
2.850
2.850
3.300
3.300
150
125
0.005
0.001
70
30
300
1.5
V
EN
= 0V, 5V
0.01
155
30
0.4
1
Max
6.5
150
1
1.246
1.249
2.550
2.562
2.907
2.921
3.366
3.382
Units
V
μA
μA
V
V
V
V
mV
%/V
%/mA
dB
dB
nV/√Hz
V
V
μA
°C
°C
I
OUT
= 1mA,
V
IN
= (V
OUT
+ 0.5V) to 6.5V
(7)
I
OUT
= 1mA to 150mA,
V
IN
= V
OUT
+ 0.5V
(7)
V
IN
> V
OUT
+0.5V, C3 = 2.2μF,
V
IN
(AC) = 100mV, f = 1kHz
(5)
V
IN
> V
OUT
+0.5V, C3 = 2.2μF,
V
IN
(AC) = 100mV, f = 1MHz
(5)
f = 1kHz, C2 > 0.1μF,
I
OUT
= 1mA
(5)
Notes:
5) Parameter is guaranteed by design, not production tested.
6) Dropout Voltage is defined as the input to output differential when the output voltage drops 1% below its normal value.
7) V
IN
= 2.7V for V
OUT
= 1.25V to 2.2V
MP8801 Rev. 1.9
10/10/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
3
MP8801 – LOW DROPOUT, 150mA LINEAR REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
= 4.5V, V
OUT
= 2.85V, C1 = 1μF, C2 = 0.1μF, C3 = 2.2μF, T
A
= +25°C unless otherwise noted.
I
GND
vs V
IN
135
130
125
120
115
110
105
I
LOAD
= 1mA
I
LOAD
= 150mA
135
130
125
120
115
110
105
V
IN
= 2.7V
2.845
0
50
100
I
LOAD
(mA)
150
2.84
3
4
5
V
IN
(V)
6
7
V
IN
= 6.5V
V
IN
= 5.0V
V
OUT
(V)
I
GND
vs I
LOAD
2.87
2.865
2.86
V
OUT
vs. V
IN
I
LOAD
= 1mA
2.855
2.85
I
LOAD
= 150mA
2
3
4
5
V
IN
(V)
6
7
80
70
60
PSRR (dB)
PSRR vs Frequency
Output Noise
Spectral Density
Output Noise
Spectral Density
50
40
30
20
10
0.01
0.1
1
10
100
FREQUENCY (KHz)
1000
128
FREQUENCY (Hz)
x: 1.024kHz
y: 240.013n
I
OUT
= 150mA
102.4K
128
FREQUENCY (Hz)
x: 1.024kHz
y: 287.004n
I
OUT
= 1mA
102.4K
V
DROPOUT
vs I
LOAD
160
140
V
DROPOUT
(mV)
Load-Transient Response
(Circuit in Figure 3)
4V
I
LOAD
(50mA/div.)
3V
Line-Transient Response
(Circuit in Figure 3)
120
100
80
60
40
20
0
0
V
IN
(1V/div.)
V
OUT
(20mV/div.)
2.85V
V
OUT
(10mV/div.)
20 40 60 80 100 120 140 160
I
LOAD
(mA)
MP8801 Rev. 1.9
10/10/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
4
MP8801 – LOW DROPOUT, 150mA LINEAR REGULATOR
PIN FUNCTIONS
Pin #
1
2
3
4
5
Name
IN
GND
EN
FB
OUT
Description
Power Source Input. IN supplies the internal power to the MP8801 and is the source of the
pass transistor. Bypass IN to GND with a 1μF or greater capacitor.
Ground.
Enable Input. Drive EN high to turn on the MP8801; low to turn it off. For automatic startup,
connect EN to IN.
Feedback Input. Connect a resistive voltage divider from OUT to FB to set the output
voltage. The OUT feedback threshold is 1.222V.
Regulator Output. OUT is the output of the linear regulator. Bypass OUT to GND with a
1μF or greater capacitor.
OPERATION
The MP8801 is a low-current, low-noise,
high-PSRR, low-dropout linear regulator. It is
intended for use in devices that require very low
noise power supplies and high-PSRR such as
PLL VCO supplies for mobile handsets and
802.11 PC Cards, as well as audio codecs and
microphones. The MP8801 uses a PMOS pass
IN
V
IN
1
INTERNAL
RESISTOR
DIVIDER
element and features internal thermal shutdown.
The normally fixed output MP8801 may be
converted to an adjustable output device by
applying a resistor divider network as shown in
Figure 2. An optional feed-forward capacitor, C
BYP
,
may be added for an improved transient response.
OUT
5
C
BYP
4
BANDGAP
REFERENCE
FB
C3
3
GND
2
V
OUT
+
--
EN
V
EN
Figure 1—Ultra-Low-Noise Fixed Output Regulator
EXTERNAL
RESISTOR
OUT
DIVIDER
V
IN
1
5
FB
+
--
4
BANDGAP
REFERENCE
R2
C
OUT
R1
C
BYP
V
OUT
V
EN
3
GND
2
Figure 2—Ultra-Low-Noise Adjustable Regulator: V
OUT
= V
FB
(1+(R1/R2))
MP8801 Rev. 1.9
10/10/2011
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
5
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