MP8903DG-2.85-LF [MPS]

Fixed Positive LDO Regulator, 2.85V, PDSO8, 2 X 2 MM, ROHS COMPLIANT, MO-229VCCD-3, QFN-8;
MP8903DG-2.85-LF
型号: MP8903DG-2.85-LF
厂家: MONOLITHIC POWER SYSTEMS    MONOLITHIC POWER SYSTEMS
描述:

Fixed Positive LDO Regulator, 2.85V, PDSO8, 2 X 2 MM, ROHS COMPLIANT, MO-229VCCD-3, QFN-8

CD 光电二极管 输出元件 调节器
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MP8903  
Low Dropout  
150mA Linear Regulator  
The Future of Analog IC Technology  
DESCRIPTION  
FEATURES  
2.7V to 6.5V Input Voltage Range  
The MP8903 is a 150mA low-dropout linear  
regulator that can operate from 2.7V to 6.5V  
input. It regulates the output with 2% accuracy  
and comes with preset 2.5V, 2.85V or 3.3V  
output. An external resistor divider may be used  
to adjust the output voltage from 1.25V to 5V.  
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  
Low 100mV Dropout at 100mA Output  
2% Accurate Output Voltage  
Stable With Low-ESR Output Capacitors  
Thermal Protection  
The MP8903 has thermal protection to guard  
against harsh operating conditions, and is  
available in small 2x2 8-pin QFN and 5-pin  
TSOT23 packages.  
Available in Tiny 2x2 8-Pin QFN and  
TSOT23-5 Packages  
APPLICATIONS  
802.11 PC Cards  
Mobile Handset PLL Power  
Audio Codec Power  
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of  
Monolithic Power Systems, Inc.  
TYPICAL APPLICATION  
V
vs I  
LOAD  
DROPOUT  
V
160  
140  
120  
100  
80  
IN  
2.7V to 6.5V  
OUTPUT  
1.25V to 5V  
IN  
OUT  
R1  
R2  
MP8903DX-X.X  
EN GND  
FB  
V
IN  
The sum of  
R1 and R2  
should not  
60  
EN (Pin3)  
may be connected  
to IN (Pin 1) directly  
40  
exceed 100k  
20  
0
0
20 40 60 80 100 120 140 160  
(mA)  
I
LOAD  
MP8903 Rev. 1.1  
9/21/2007  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2007 MPS. All Rights Reserved.  
1
MP8903 – LOW DROPOUT, 150mA LINEAR REGULATOR  
PACKAGE REFERENCE  
TOP VIEW  
TOP VIEW  
GND  
EN  
IN  
1
2
3
4
8
7
6
5
FB  
IN  
GND  
EN  
1
2
3
5
4
OUT  
FB  
NC  
OUT  
OUT  
IN  
Part Number**  
MP8903DJ2.5  
MP8903DJ2.85  
MP8903DJ3.3  
Package  
Temp  
–40°C to +85°C  
Part Number*  
Package  
Temp  
–40°C to +85°C  
MP8903DG2.5  
QFN8  
2mm x 2mm  
TSOT23-5  
MP8903DG2.85  
MP8903DG3.3  
** For Tape & Reel, add suffix –Z (eg. MP8903DJ–2.85–Z)  
For Tape & Reel, add suffix –Z (eg. MP8903DG–2.85–Z)  
For RoHS Compliant Packaging, add suffix –LF  
(eg. MP8903DG–2.85–LF–Z)  
*
For RoHS Compliant Packaging, add suffix –LF  
(eg. MP8903DJ–2.85–LF–Z)  
Recommended Operating Conditions (2)  
Input Voltage .................................. 2.7V to 6.5V  
Output Voltage................................. 1.25V to 5V  
Load Current...........................150mA Maximum  
Operating Temperature .............–40°C to +85°C  
ABSOLUTE MAXIMUM RATINGS (1)  
IN Supply Voltage.......................–0.3V to +7.0V  
FB Voltage.........................–0.3V to VOUT + 0.3V  
All Other Pins.................................–0.3V to +6V  
Junction Temperature...............................150°C  
Lead Temperature ....................................260°C  
Storage Temperature ............. –65°C to +150°C  
Thermal Resistance (3)  
θJA  
θJC  
TSOT23-5..............................220.... 110.. °C/W  
2x2 QFN8 ...............................80...... 16... °C/W  
Notes:  
1) Exceeding these ratings may damage the device.  
2) The device is not guaranteed to function outside of its  
operating conditions.  
3) Measured on approximately 1” square of 1 oz copper.  
ELECTRICAL CHARACTERISTICS  
VIN = 5V, TA = +25°C, unless otherwise noted.  
Parameter  
Symbol Condition  
Min  
Typ  
Max  
6.5  
±2.0  
1
Units  
V
Operating Voltage  
Output Voltage Accuracy  
Shutdown Current  
IOUT = 1mA  
2.7  
IOUT = 1mA, VOUT = 1.5V to 5V  
±1.0  
0.1  
%
VEN = 0V, VIN = 5V  
µA  
1.197 1.222 1.246  
FB Regulation Voltage  
Dropout Voltage (5)  
V
1.194 1.222 1.249  
–40°C TA +85°C  
VOUT = 3V  
OUT = 4V  
150  
125  
IOUT = 150mA  
mV  
V
MP8903 Rev. 1.1  
9/21/2007  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2007 MPS. All Rights Reserved.  
2
MP8903 – LOW DROPOUT, 150mA LINEAR REGULATOR  
ELECTRICAL CHARACTERISTICS  
VIN = 5V, TA = +25°C, unless otherwise noted.  
Parameter  
Symbol Condition  
OUT = 1mA,  
VIN = (VOUT + 0.5V) to 6.5V (6)  
Min  
Typ  
Max  
Units  
I
Line Regulation  
0.005  
0.08  
%/V  
I
OUT = 1mA to 150mA,  
Load Regulation  
PSRR  
0.001  
50  
0.02  
%/mA  
dB  
VIN = VOUT + 0.5V (6)  
VIN > VOUT +0.5V, C3 = 2.2µF,  
VIN(AC) = 100mV, f = 1kHz (4)  
VIN > VOUT +0.5V, C3 = 2.2µF,  
VIN(AC) = 100mV, f = 1MHz (4)  
20  
dB  
EN Input High Voltage  
EN Input Low Voltage  
EN Input Bias Current  
Thermal Protection (4)  
Thermal Protection Hysteresis (4)  
Notes:  
1.5  
1
V
V
0.4  
VEN = 0V  
0.01  
155  
30  
µA  
°C  
°C  
4) Parameter is guaranteed by design, not production tested.  
5) Dropout Voltage is defined as the input to output differential when the output voltage drops 1% below its normal value.  
6) VIN = 2.7V for VOUT = 1.25V to 2.2V  
MP8903 Rev. 1.1  
9/21/2007  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2007 MPS. All Rights Reserved.  
3
MP8903 – LOW DROPOUT, 150mA LINEAR REGULATOR  
TYPICAL PERFORMANCE CHARACTERISTICS  
VIN = 4.5V, VOUT = 2.85V, C1 = 1µF, C2 = 0.1µF, C3 = 2.2µF, TA = +25°C unless otherwise noted.  
I
vs V  
I
vs I  
LOAD  
GND  
IN  
GND  
135  
130  
125  
120  
115  
110  
105  
135  
130  
125  
120  
115  
110  
105  
V
= 6.5V  
IN  
I
= 150mA  
V
= 5.0V  
LOAD  
IN  
I
= 1mA  
LOAD  
V
= 2.7V  
100  
IN  
2
3
4
5
6
7
0
50  
150  
V
(V)  
I
(mA)  
LOAD  
IN  
V
vs I  
LOAD  
DROPOUT  
V
OUT  
vs. V  
IN  
160  
140  
120  
100  
80  
2.87  
2.865  
2.86  
I
= 1mA  
LOAD  
2.855  
2.85  
60  
I
= 150mA  
LOAD  
40  
2.845  
2.84  
20  
0
0
20 40 60 80 100 120 140 160  
(mA)  
3
4
5
6
7
I
V
(V)  
LOAD  
IN  
MP8903 Rev. 1.1  
9/21/2007  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2007 MPS. All Rights Reserved.  
4
MP8903 – LOW DROPOUT, 150mA LINEAR REGULATOR  
PIN FUNCTIONS  
2x2 QFN8 TSOT23-5  
Pin #  
1
Pin #  
2
Name Description  
GND Ground.  
Enable Input. Drive EN high to turn on the MP8903; low to turn it off. For  
automatic startup, connect EN to IN.  
2
3
1
5
EN  
Power Source Input. IN supplies the internal power to the MP8903 and is the  
source of the pass transistor. Bypass IN to GND with a 1µF or greater  
capacitor.  
Regulator Output. OUT is the output of the linear regulator. Bypass OUT to  
GND with a 1µF or greater capacitor.  
3, 4  
IN  
5, 6  
7
OUT  
NC No Connect.  
Feedback Input. Connect a resistive voltage divider from OUT to FB to set the  
output voltage. The OUT feedback threshold is 1.222V.  
8
4
FB  
OPERATION  
The MP8903 is a low-current, low-dropout  
linear regulator. The MP8903 uses a PMOS  
pass element and features internal thermal  
shutdown. The normally fixed output MP8903  
may be converted to an adjustable output device  
by applying a resistor divider network as shown in  
Figure 2. An optional feed-forward capacitor, CBYP  
,
may be added for an improved transient response.  
OUT  
V
V
IN  
OUT  
INTERNAL  
RESISTOR  
DIVIDER  
C
BYP  
+
--  
FB  
BANDGAP  
REFERENCE  
C3  
V
EN  
GND  
Figure 1—Fixed Output Regulator  
EXTERNAL  
RESISTOR  
DIVIDER  
OUT  
V
V
IN  
OUT  
R1  
FB  
C
BYP  
+
--  
BANDGAP  
REFERENCE  
R2  
C
OUT  
V
EN  
GND  
Figure 2—Adjustable Regulator: VOUT = VFB(1+(R1/R2))  
MP8903 Rev. 1.1  
9/21/2007  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2007 MPS. All Rights Reserved.  
5
MP8903 – LOW DROPOUT, 150mA LINEAR REGULATOR  
Input Capacitor Selection  
APPLICATION INFORMATION  
Setting the Output Voltage  
The fixed output voltage of the MP8903 is set to  
2.5V, 2.85V or 3.3V, depending on the internal  
resistor divider (Figure 1). You can also adjust  
the output voltage by using an external resistor  
divider (R1 and R2 in Figure 2). However, the  
sum of R1 and R2 should not exceed 100kin  
order to minimize the impact of the internal  
resistor divider. For an accurate output-voltage  
setting, use 10k(±1%) for the low-side  
resistor R2 of the voltage divider, while the  
high-side resistor R1 can be determined by the  
equation:  
For proper operation, place a ceramic capacitor  
(C1) between 1µF and 10µF of dielectric type  
X5R or X7R between the input pin and ground.  
Larger values in this range will help improve  
line transient response at the drawback of  
increased size.  
Output Capacitor Selection  
For stable operation, use a ceramic capacitor  
(C3) of type X5R or X7R between 1µF and  
10µF. Larger values in this range will help  
improve load transient response and reduce  
noise with the drawback of increased size.  
Output capacitors of other dielectric types may  
be used, but are not recommended as their  
capacitance can deviate greatly from their rated  
value over temperature.  
VOUT VFB  
R1 = R2×  
VFB  
Where VFB is the OUT feedback threshold  
voltage equal to 1.222V.  
To improve load transient response, add a  
small ceramic (X5R, X7R or Y5V dielectric)  
100nF feed forward capacitor in parallel with R1.  
The feed forward capacitor is not required for  
stable operation.  
Example: For 2.5V Output  
2.5V 1.222V  
R1=  
= 10.41kΩ  
1.222V  
10kΩ  
You can select a standard 10.5k(±1%)  
resistor for R1.  
The following table lists the selected R1 values  
for some typical output voltages:  
Table 1—Adjustable Output Voltage R1 Values  
R2 ()  
VOUT (V)  
1.25  
1.5  
1.8  
2
R1 ()  
232  
2.26k  
4.75k  
6.34k  
10.5k  
13k  
2.5  
2.8  
3
10k  
14.7k  
16.9k  
22.6k  
30.9k  
3.3  
4
5
In Figures 3 and 4, C2 is added for an improved  
transient response.  
MP8903 Rev. 1.1  
9/21/2007  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2007 MPS. All Rights Reserved.  
6
MP8903 – LOW DROPOUT, 150mA LINEAR REGULATOR  
TYPICAL APPLICATION CIRCUIT  
V
IN  
2.7V to 6.5V  
3, 4  
5, 6  
OUTPUT  
2.85V  
IN  
OUT  
C2  
100nF  
MP8903DX-2.85  
2
8
V
IN  
EN  
GND  
FB  
1
Figure 3—Typical Application Circuit (Fixed)  
V
IN  
2.7V to 6.5V  
3, 4  
5, 6  
OUTPUT  
2V  
IN  
OUT  
MP8903DX-X.X  
2
8
V
IN  
EN GND  
FB  
1
Figure 4—Typical Application Circuit (Adjustable)  
MP8903 Rev. 1.1  
9/21/2007  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2007 MPS. All Rights Reserved.  
7
MP8903 – LOW DROPOUT, 150mA LINEAR REGULATOR  
PACKAGE INFORMATION  
2mm x 2mm QFN8  
PIN 1 ID  
SEE DETAIL A  
1.90  
2.10  
0.25  
0.45  
0.45  
0.65  
PIN 1 ID  
MARKING  
0.18  
0.30  
8
5
1
1.90  
2.10  
1.05  
1.25  
0.50  
BSC  
PIN 1 ID  
INDEX AREA  
4
TOP VIEW  
BOTTOM VIEW  
PIN 1 ID OPTION A  
R0.20 TYP.  
PIN 1 ID OPTION B  
R0.20 TYP.  
0.80  
1.00  
0.20 REF  
0.00  
0.05  
SIDE VIEW  
DETAIL A  
NOTE:  
1.90  
0.60  
0.70  
1) ALL DIMENSIONS ARE IN MILLIMETERS.  
2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH.  
3) LEAD COPLANARITY SHALL BE 0.10 MILLIMETER MAX.  
4) DRAWING CONFORMS TO JEDEC MO-229, VARIATION VCCD-3.  
5) DRAWING IS NOT TO SCALE.  
0.25  
0.50  
1.20  
RECOMMENDED LAND PATTERN  
MP8903 Rev. 1.1  
9/21/2007  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2007 MPS. All Rights Reserved.  
8
MP8903 – LOW DROPOUT, 150mA LINEAR REGULATOR  
TSOT23-5  
0.95  
BSC  
0.60  
TYP  
2.80  
3.00  
5
4
1.20  
TYP  
1.50  
1.70  
2.60  
TYP  
2.60  
3.00  
1
3
TOP VIEW  
RECOMMENDED LAND PATTERN  
0.84  
0.90  
1.00 MAX  
SEATING PLANE  
0.09  
0.20  
0.30  
0.50  
0.00  
0.10  
0.95 BSC  
SEE DETAIL "A"  
FRONT VIEW  
SIDE VIEW  
NOTE:  
1) ALL DIMENSIONS ARE IN MILLIMETERS.  
2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,  
PROTRUSION OR GATE BURR.  
GAUGE PLANE  
0.25 BSC  
3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH  
OR PROTRUSION.  
0.30  
0.50  
4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING)  
SHALL BE 0.10 MILLIMETERS MAX.  
0o-8o  
5) DRAWING CONFORMS TO JEDEC MO-193, VARIATION AA.  
6) DRAWING IS NOT TO SCALE.  
DETAIL A  
NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third  
party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not  
assume any legal responsibility for any said applications.  
MP8903 Rev. 1.1  
9/21/2007  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2007 MPS. All Rights Reserved.  
9

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