MP20043DGT-C [MPS]

Fixed Positive LDO Regulator,;
MP20043DGT-C
型号: MP20043DGT-C
厂家: MONOLITHIC POWER SYSTEMS    MONOLITHIC POWER SYSTEMS
描述:

Fixed Positive LDO Regulator,

输出元件 调节器
文件: 总13页 (文件大小:303K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
MP20043  
Dual Channel, 300mA Linear  
Regulator With Programmable  
Output Voltage and Output Discharge  
The Future of Analog IC Technology  
DESCRIPTION  
FEATURES  
The MP20043 is a dual-channel, low noise, low  
dropout and high PSRR linear regulator with  
programmable output voltage. The output  
voltage of MP20043 ranges from 1.2V to 3.3V  
in 100mV increments and 2.5% accuracy by  
operating from a +2.5V to +5.5V input. The  
different output voltage options can be  
programmed by setting the voltage of P1 and  
P2 to VDD, GND or floating. There are 9  
different voltage settings in one chip. Each  
output channel can supply up to 300mA of load  
current.  
The MP20043 uses two internal PMOSs as the  
pass devices, which consumes 150μA supply  
current when both channels are enabled at no  
load condition. The EN1 and EN2 pins control  
each output respectively. When both channels  
shutdown simultaneously, the chip turns off and  
consumes nearly zero operation current which  
is suitable for battery-power devices. The  
MP20043 also features current limiting and over  
temperature protection.  
Programmable Output Voltage  
Up to 300mA Output Current (Each LDO)  
60mV Dropout at 100mA Load  
Dual Shutdown Pins Control Each Output  
75dB PSRR at 1kHz  
7μVRMS Low Noise Output  
Current Limiting and Thermal Protection  
Short Circuit Protection  
Two LDOs in TQFN8 (2mm×2mm) Package  
Output Load Discharge when Disabled  
APPLICATIONS  
Cellular Phones  
Battery-powered Equipment  
Laptop, Notebook, and Palmtop Computers  
Hand-held Equipment  
Wireless LAN  
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks  
of Monolithic Power Systems, Inc.  
It is available in a TQFN8 (2mm×2mm) package  
TYPICAL APPLICATION  
VOUT1  
VIN  
V
V
V
IN  
OUT1  
OUT2  
MP20043  
P1  
P2  
VOUT2  
Chip Enable  
EN1  
EN2  
GND  
MP20043 Rev.0.91  
10/10/2011  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2011 MPS. All Rights Reserved.  
1
MP20043 –DUAL-CHANNEL, 300mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE  
ORDERING INFORMATION*  
Part Number*  
Package  
Top Marking  
Free Air Temperature (TA)  
MP20043DGT-A-LF-Z  
MP20043DGT-B-LF-Z  
MP20043DGT-C-LF-Z  
MP20043DGT-D-LF-Z  
MP20043DGT-J-LF-Z  
MP20043DGT-E-LF-Z  
TQFN8 (2mm×2mm)  
-40°C to +85°C  
* For other output voltage combination versions between 1.2V and 3.3V, contact factory for availability.  
ORDERING GUIDE**  
MP20043DGT- -LF-Z  
Output Voltage  
A: Combination A  
B: Combination B  
C: Combination C  
D: Combination D  
J : Combination J  
E : Combination E  
Package Type  
GT: TQFN (2mm x 2mm)  
** For RoHS Compliant Packaging, add suffix - LF (e.g. MP20043DGT- -LF);  
For Tape and Reel, add suffix -Z (e.g. MP20043DGT- -LF-Z).  
PACKAGE REFERENCE  
TOP VIEW  
VIN  
EN1  
P2  
1
2
3
4
8
7
6
5
VOUT1  
VOUT2  
GND  
P1  
EN2  
ABSOLUTE MAXIMUM RATINGS (1)  
Supply Input Voltage .................................... 6V  
All Other Pins ............................................ 5.5V  
Thermal Resistance (4)  
TQFN 8L............................... 80  
θJA  
θJC  
16 °C/W  
(2)  
Notes:  
Power Dissipation, PD @ TA =25°C,  
1) Exceeding these ratings may damage the device.  
2) The maximum allowable power dissipation is a function of the  
maximum junction temperature TJ(MAX), the junction-to-  
ambient thermal resistance θJA, and the ambient temperature  
TA. The maximum allowable continuous power dissipation at  
any ambient temperature is calculated by PD(MAX)=(TJ(MAX)-  
TA)/ θJA. 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.  
TQFN-8L ................................................... 1.5W  
Storage Temperature Range..... -65°C to 150°C  
Lead Temperature (Soldering, 10sec) .....260°C  
ESD Susceptibility  
HBM (Human Body Mode) .......................... 2kV  
MM (Machine Mode) ................................. 200V  
Recommended Operating Conditions (3)  
Supply Input Voltage......................2.5V to 5.5 V  
Operating Junct. Temp (TJ)...... -40°C to +125°C  
3) The device is not guaranteed to function outside of its  
operating conditions.  
4) Measured on JESD51-7 4-layer board.  
MP20043 Rev.0.91  
10/10/2011  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2011 MPS. All Rights Reserved.  
2
MP20043 –DUAL-CHANNEL, 300mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE  
PROGRAMMABLE OUTPUT VOLTAGE SETTING  
Combination A:  
Combination C:  
P1 State P2 State VOUT1  
VOUT2  
P1 State P2 State  
VOUT1  
VOUT2  
L
L
L
H
1.5V  
2.8V  
L
L
1.8V  
2.8V  
1.8V  
1.8V  
1.8V  
1.8V  
2.7V  
2.8V  
2.9V  
2.8V  
2.9V  
2.8V  
2.7V  
2.6V  
2.8V  
2.8V  
2.9V  
3.3V  
L
H
1.8V  
1.8V  
1.85V  
2.6V  
2.6V  
2.85V  
3V  
2.85V  
3V  
L
Open  
L
L
Open  
L
H
H
2.85V  
2.7V  
3.3V  
3.3V  
3.3V  
3.3V  
H
H
H
H
H
Open  
L
H
Open  
L
Open  
Open  
Open  
Open  
Open  
Open  
H
H
Open  
Open  
3.3V  
Combination B:  
Combination D:  
P1 State P2 State  
VOUT1  
VOUT2  
P1 State P2 State  
VOUT1  
VOUT2  
L
L
1.2V  
2.8V  
L
L
1.8V  
2.9V  
L
H
1.5V  
1.5V  
1.8V  
1.8V  
2.8V  
2.8V  
3V  
1.8V  
2.8V  
2.6V  
2.8V  
2.8V  
3.3V  
3.3V  
3.3V  
L
H
2.6V  
1.8V  
2.9V  
2.8V  
2.8V  
1.8V  
1.8V  
1.5V  
2.8V  
2.8V  
2.9V  
3.3V  
2.8V  
2.6V  
2.7V  
2.8V  
L
Open  
L
L
Open  
L
H
H
H
H
H
H
H
Open  
L
H
Open  
L
Open  
Open  
Open  
Open  
Open  
Open  
H
H
Open  
3.3V  
Open  
Combination J:  
Combination E:  
P1 State P2 State  
VOUT1  
VOUT2  
P1 State P2 State  
VOUT1  
VOUT2  
L
L
3.3V  
3.3V  
L
L
1.2V  
3.3V  
L
H
1.1V  
1.2V  
1.8V  
1.1V  
1.1V  
1.2V  
1.2V  
1.8V  
3.3V  
2.5V  
3.3V  
1.8V  
2.5V  
1.8V  
3.3V  
2.5V  
L
H
1.2V  
1.2V  
1.5V  
1.8V  
1.8V  
2.5V  
1.8V  
1.5V  
1.8V  
1.5V  
2.5V  
2.5V  
3.3V  
3.3V  
1.8V  
3.3V  
L
Open  
L
L
Open  
L
H
H
H
H
H
H
H
Open  
L
H
Open  
L
Open  
Open  
Open  
Open  
Open  
Open  
H
H
Open  
Open  
MP20043 Rev.0.91  
10/10/2011  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2011 MPS. All Rights Reserved.  
3
MP20043 –DUAL-CHANNEL, 300mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE  
ELECTRICAL CHARACTERISTICS  
VIN = (VOUT+0.4V) or +2.5V, whichever is greater. CIN=COUT1=COUT2=1µF, EN1=EN2=VIN, Typical  
Value at TA = 25°C for each LDO unless otherwise noted.  
Parameter  
Symbol Condition  
Min  
Typ  
Max  
Units  
Output Voltage Accuracy  
Maximum Output Current  
Current Limit  
ΔVOUT  
IMAX  
ILOAD=1mA  
-2.5  
300  
2.5  
%
Continuous  
mA  
mA  
µA  
ILIM  
Short circuit current limit  
No Load (Single Channel)  
No Load (Dual Channel)  
EN1 = EN2 = GND  
IOUT = 100mA  
660  
90  
Quiescent Current  
IG  
150  
0.01  
60  
µA  
Shutdown Supply Current  
Dropout Voltage (5)  
IGSD  
1
µA  
120  
280  
mV  
mV  
VDROP  
IOUT = 300mA  
180  
VIN=(VOUT+0.4V or 2.5V to  
5.5V, IOUT=1mA  
Line Regulation(6)  
Load Regulation(7)  
ΔVLINE  
-
0.1  
%/V  
VOUT>1.5V  
1.2  
1.8  
%
%
V
ΔVLOAD  
VOUT1.5V  
EN Logic High  
VIH  
VIL  
VIN = 2.5V to 5.5V  
VIN = 2.5V to 5.5V  
EN = GND or VIN  
1.6  
EN Logic Low  
0.4  
V
EN Input Bias Current  
Thermal Shutdown Temperature  
Thermal Shutdown Hysteresis  
ISD  
100  
nA  
°C  
°C  
TSD  
ΔTSD  
140  
10  
10Hz to 30kHz,  
COUT=1µF, ILOAD=1mA  
Output Voltage Noise  
VNOISE  
7
μVRMS  
100Hz, COUT = 1μF,ILOAD  
=
300mA (Single Channel  
loaded)  
75  
dB  
Output Voltage AC PSRR  
1kHz , COUT = 1μF,ILOAD  
=
300mA (Single Channel  
loaded)  
75  
dB  
Output  
Resistance in Shutdown  
Voltage  
Discharge  
VIN=5V, EN1=EN2=GND  
20  
100  
5
High  
state  
bias current  
Low state bias  
current  
µA  
V
P1/P2 Termination bias for  
setting High, Low, Open States  
VIN=2.5V  
to 5.5V  
8  
Open state  
0.7  
Notes:  
5) Dropout Voltage is defined as the input to output differential when the output voltage drops 100mV below its nominal value.  
VOUT V  
VOUT V  
IN(MIN)  
IN(MAX)  
6) Line Regulation =  
7) Load Regulation =  
×100(%/ V)  
V
V  
)
× VOUT(NOM)  
IN(MIN)  
IN MAX  
(
V
V  
OUT IOUT(MIN)  
OUT IOUT(MAX)  
×100(%)  
VOUT NOM  
(
)
MP20043 Rev.0.91  
10/10/2011  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2011 MPS. All Rights Reserved.  
4
MP20043 –DUAL-CHANNEL, 300mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE  
PIN FUNCTIONS  
Pin #  
Name  
VIN  
Description  
1
2
3
4
5
6
7
8
Supply Input Pin  
EN1  
Channel 1 Enable (Active High). Do Not Float This Pin.  
Programming input 2. The state of P2 selects one of nine output voltage options.  
Programming input 1. The state of P1 selects one of nine output voltage options.  
Channel 2 Enable (Active High). Do Not Float This Pin.  
Common Ground  
P2  
P1  
EN2  
GND  
VOUT2  
VOUT1  
Channel 2 Output Voltage  
Channel 1 Output Voltage  
MP20043 Rev.0.91  
10/10/2011  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2011 MPS. All Rights Reserved.  
5
MP20043 –DUAL-CHANNEL, 300mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE  
TYPICAL PERFORMANCE CHARACTERISTICS  
Test Combination A, VIN = 3.7V, P1 Open, P2 Open (VOUT1=2.8V, VOUT2=3.3V), CIN = COUT1  
OUT2=1μF, EN1=EN2= VIN, TA = +25ºC, unless otherwise noted.  
=
C
Ground Pin Current vs.  
Input Voltage Temperature  
Ground Pin Current vs.  
Dropout Voltage vs.  
Output Current  
180  
160  
140  
120  
100  
80  
1200  
1000  
800  
600  
400  
200  
0
700  
600  
500  
400  
300  
200  
100  
0
I
=300mA  
OUT  
Channel 1  
I
=300mA  
OUT  
I
=0mA  
60  
OUT  
Channel 2  
I
=0mA  
OUT  
40  
20  
Both Channels Loaded  
4.5 5.5  
INPUT VOLTAGE(V)  
Both Channels Loaded  
20 40 60 80 100  
0
3.5  
4
5
-40 -20  
0
0
50 100 150 200 250 300  
Dropout Voltage vs.  
Temperature  
Enable Threshold vs.  
Input Voltage (Channel 1)  
Enable Threshold vs.  
Input Voltage (Channel 2)  
1.5  
1.4  
1.3  
1.2  
1.1  
1
240  
220  
200  
180  
160  
140  
120  
100  
80  
1.5  
1.4  
1.3  
1.2  
1.1  
1.0  
0.9  
0.8  
0.7  
0.6  
0.5  
Channel 2  
Channel 1  
EN High Threshold  
EN High Threshold  
Channel 1  
Channel 2  
0.9  
0.8  
0.7  
0.6  
0.5  
EN Low Threshold  
EN Low Threshold  
I
=300mA  
OUT  
60  
-40 -20  
0
20 40 60 80 100  
3.5  
4
4.5  
5
5.5  
3.5  
4
4.5  
5
5.5  
o
INPUT VOLTAGE(V)  
INPUT VOLTAGE(V)  
TEMPERATURE( C)  
Enable Threshold vs.  
Temperature (Channel 1)  
Enable Threshold vs.  
Temperature (Channel 2)  
Current Limit vs.  
Input Voltage  
800  
700  
600  
500  
400  
300  
200  
1.3  
1.2  
1.1  
1
1.3  
1.2  
1.1  
1
Channel 1, V =3.7V  
IN  
Channel 2, V =3.7V  
IN  
EN High Threshold  
EN High Threshold  
Channel 1  
Channel 2  
0.9  
0.8  
0.7  
0.6  
0.5  
0.9  
0.8  
0.7  
0.6  
0.5  
EN Low Threshold  
EN Low Threshold  
20 40 60 80 100  
-40 -20  
0
-40 -20  
0
20 40 60 80 100  
3
3.5  
4
4.5  
5
5.5  
o
o
TEMPERATURE( C)  
INPUT VOLTAGE(V)  
TEMPERATURE( C)  
MP20043 Rev.0.91  
10/10/2011  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2011 MPS. All Rights Reserved.  
6
MP20043 –DUAL-CHANNEL, 300mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE  
TYPICAL PERFORMANCE CHARACTERISTICS (continued)  
Test Combination A, VIN = 3.7V, P1 Open, P2 Open (VOUT1=2.8V, VOUT2=3.3V), CIN = COUT1= COUT2  
=
1μF, EN1=EN2= VIN, TA = +25ºC, unless otherwise noted.  
Current Limit vs.  
Temperature  
Line Regulation  
Load Regulation  
0.30%  
600  
550  
500  
450  
400  
350  
300  
0.20%  
0.15%  
0.10%  
0.05%  
0.00%  
-0.05%  
-0.10%  
-0.15%  
-0.20%  
V
=3.7V  
IN  
V
=3.7V  
IN  
Channel 1  
0.20%  
0.10%  
0.00%  
-0.10%  
-0.20%  
-0.30%  
Channel 2  
Channel 2  
Channel 1  
Channel 2  
Channel 1  
I
=1mA  
OUT  
-40 -20  
0
20 40 60 80 100  
o
0
50 100 150 200 250 300  
OUTPUT CURRENT(mA)  
3.0  
3.5  
4.0  
4.5  
5.0  
5.5  
INPUT VOLTAGE(V)  
TEMPERATURE( C)  
C
ESR Stability vs.  
Output Voltage Accuracy  
OUT  
PSRR  
Ouput Current  
(For Both Channels)  
0.20%  
0.15%  
0.10%  
0.05%  
0.00%  
-0.05%  
-0.10%  
-0.15%  
-0.20%  
100  
10  
1
100  
80  
60  
40  
20  
0
V
=3.7V, I =1mA  
IN OUT  
Channel 1  
Channel 1  
Unstable Region  
=10uF  
C
OUT  
Channel 2  
Channel 2  
C
=0.47uF  
OUT  
I
=300mA,  
OUT  
Single Channel loaded  
Stable Region  
0.1  
-20  
1M 10M  
0
50 100 150 200 250 300  
OUTPUT CURRENT(mA)  
-40 -20  
0
20 40 60 80 100  
10 100 1k 10k 100k  
o
FREQUENCY (Hz)  
TEMPERATURE ( C)  
Channel to Channel Isolation  
vs. Frequency  
60  
50  
40  
30  
20  
10  
0
-10  
10 100 1k 10k 100k 1M 10M  
FREQUENCY (Hz)  
MP20043 Rev.0.91  
10/10/2011  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2011 MPS. All Rights Reserved.  
7
MP20043 –DUAL-CHANNEL, 300mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE  
TYPICAL PERFORMANCE CHARACTERISTICS (continued)  
Test Combination A, VIN = 3.7V, P1 Open, P2 Open (VOUT1=2.8V, VOUT2=3.3V), CIN = COUT1= COUT2  
1μF, EN1=EN2= VIN, TA = +25ºC, unless otherwise noted.  
=
Input Power Up  
VIN=3.7V, No Load  
Input Power Down  
VIN=3.7V, No Load  
Input Power Up  
VIN=3.7V, IOUT1=IOUT2=300mA,  
with Resistive Load  
VIN  
2V/div  
VIN  
2V/div  
VIN  
2V/div  
VOUT1  
2V/div  
IOUT1  
VOUT1  
2V/div  
VOUT1  
2V/div  
200mA/div  
VOUT2  
VOUT2  
2V/div  
IOUT1, OUT2  
VOUT2  
2V/div  
IOUT1, OUT2  
2V/div  
IOUT2  
200mA/div  
200mA/div  
200mA/div  
200ms/div  
200ms/div  
200ms/div  
Input Power Down  
VIN=3.7V, IOUT1=IOUT2=300mA,  
EN Start Up  
VIN=3.7V, IOUT1=IOUT2=300mA,  
EN Shut Down  
VIN=3.7V, IOUT1=IOUT2=300mA,  
with Resistive Load  
with Resistive Load  
with Resistive Load  
VIN  
2V/div  
EN  
2V/div  
VOUT1  
2V/div  
IOUT1  
EN  
2V/div  
VOUT1  
2V/div  
IOUT1  
VOUT1  
2V/div  
IOUT1  
200mA/div  
200mA/div  
VOUT2  
200mA/div  
VOUT2  
2V/div  
IOUT2  
VOUT2  
2V/div  
IOUT2  
2V/div  
IOUT2  
200mA/div  
200mA/div  
200mA/div  
100ms/div  
40us/div  
40us/div  
Line Transient (Channel 1)  
VIN=3.7V to 4.7V, IOUT1=300mA,  
with Resistive Load  
Line Transient (Channel 2) Load Transient (Channel 1)  
VIN=3.7V to 4.7V, IOUT2=300mA,  
VIN=3.7, IOUT1=1mA to 300mA,  
with Resistive Load  
with Resistive Load  
VOUT1(AC)  
100mV/div  
VOUT1(AC)  
VOUT2(AC)  
10mV/div  
10mV/div  
VIN  
1V/div  
IOUT1  
VIN  
1V/div  
IOUT2  
IOUT1  
200mA/div  
200mA/div  
200mA/div  
400us/div  
400us/div  
40us/div  
MP20043 Rev.0.91  
10/10/2011  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2011 MPS. All Rights Reserved.  
8
MP20043 –DUAL-CHANNEL, 300mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE  
TYPICAL PERFORMANCE CHARACTERISTICS (continued)  
Test Combination A, VIN = 3.7V, P1 Open, P2 Open (VOUT1=2.8V, VOUT2=3.3V), CIN = COUT1= COUT2  
=
1μF, EN1=EN2= VIN, TA = +25ºC, unless otherwise noted.  
Load Transient (Channel 2) OCP Start Up  
OCP Start Up  
VIN=3.7V, Short VOUT2 to  
VIN=3.7, IOUT2=1mA to 300mA,  
VIN=3.7V, Short VOUT1 to  
with Resistive Load  
END before Start Up  
END before Start Up  
VIN  
2V/div  
VOUT2  
2V/div  
VIN  
2V/div  
VOUT1  
VOUT2(AC)  
100mV/div  
2V/div  
IOUT1  
200mA/div  
VOUT1  
IOUT2  
200mA/div  
VOUT2  
IOUT2  
200mA/div  
2V/div  
2V/div  
40us/div  
100ms/div  
100ms/div  
OCP Recovery  
VIN=3.7V, Remove the Over  
OCP Recovery  
VIN=3.7V, Remove the Over  
Current Conditon of Channel 1  
Current Conditon of Channel 2  
VIN  
2V/div  
VOUT2  
2V/div  
VIN  
2V/div  
VOUT1  
2V/div  
IOUT1  
IOUT1  
200mA/div  
VOUT1  
200mA/div  
VOUT2  
2V/div  
2V/div  
40ms/div  
20ms/div  
MP20043 Rev.0.91  
10/10/2011  
www.MonolithicPower.com  
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© 2011 MPS. All Rights Reserved.  
9
MP20043 –DUAL-CHANNEL, 300mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE  
FUNCTION BLOCK DIAGRAM  
Current  
Limit  
Thermal  
Protection  
Current  
Limit  
VIN  
VREF  
VOUT1  
VOUT2  
GND  
EN1  
P1  
EN2  
P2  
Vout Programmable  
Block  
Figure1—Function Block Diagram  
MP20043 Rev.0.91  
10/10/2011  
www.MonolithicPower.com  
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© 2011 MPS. All Rights Reserved.  
10  
MP20043 –DUAL-CHANNEL, 300mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE  
OPERATION  
The MP20043 integrates two low noise, low  
dropout, low quiescent current and high PSRR  
linear regulators. It is intended for use in  
devices that require very low voltage, low  
quiescent current power such as wireless LAN,  
battery-powered equipment and hand-held  
equipment. Output voltages are optional  
ranging from 1.2V to 3.3V, and each channel  
can supply current up to 300mA. The part uses  
internal PMOSs as the pass elements and  
features internal thermal shutdown and internal  
current limit circuits.  
tied to VIN to keep the regulator output always  
on if the application does not require the  
shutdown feature. Do not float the EN pins.  
Current Limit  
The MP20043 includes two independent current  
limit structures which monitor and control each  
PMOS’s gate voltage limiting the guaranteed  
maximum output current to 490mA.  
Thermal Protection  
Thermal protection turns off the PMOS when  
the junction temperature exceeds +140ºC,  
allowing the IC to cool. When the IC’s junction  
temperature drops by 10ºC, the PMOS will be  
turned on again. Thermal protection limits total  
power dissipation in the MP20043. For reliable  
operation, the junction temperature should be  
limited to 125 ºC maximum.  
Dropout Voltage  
Dropout voltage is the minimum input to output  
differential voltage required for the regulator to  
maintain an output voltage within 100mV of its  
nominal value. Because the PMOS pass  
element behaves as a low-value resistor, the  
dropout voltage of MP20043 is very low.  
Internal P-Channel Pass Device  
The MP20043 features dual typical 0.6P-  
channel MOSFET pass devices. It provides  
several advantages over similar designs using  
PNP pass transistors, including longer battery  
life.  
Shutdown  
The MP20043 has two EN pins to control each  
channel respectively. And each channel can be  
switched ON or OFF by a logic input at the EN  
pin. A high voltage at this pin will turn the  
device on. When the EN pin is low, the  
regulator output is off. The EN pin should be  
MP20043 Rev.0.91  
10/10/2011  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2011 MPS. All Rights Reserved.  
11  
MP20043 –DUAL-CHANNEL, 300mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE  
APPLICATION INFORMATION  
Input capacitor of larger value will help improve  
line transient response with the drawback of  
increased size. Ceramic capacitors are  
preferred, but tantalum capacitors may also  
sufficient.  
Output Voltage  
The output  
voltage  
of  
MP20043  
is  
programmable with setting different states of P1  
PIN and P2 PIN. For combination A, the setting  
rule is as the following table:  
Output Capacitor Selection  
Table 1 Programmable Output Voltage  
Setting (Combination A)  
The MP20043 is designed specifically to work  
with very low ESR ceramic output capacitor in  
space-saving and performance consideration. A  
ceramic capacitor in the range of 0.47µF and  
10µF, and with ESR lower than 1is suitable  
for the MP20043 application circuit. Output  
capacitor of larger values will help to improve  
load transient response and reduce noise with  
the drawback of increased size.  
P1 State P2 State  
VOUT1  
VOUT2  
L
L
1.5V  
2.8V  
L
H
1.8V  
1.8V  
1.8V  
1.8V  
2.7V  
2.8V  
2.9V  
2.8V  
2.9V  
2.8V  
2.7V  
2.6V  
2.8V  
2.8V  
2.9V  
3.3V  
L
Open  
L
H
H
H
H
Open  
L
Open  
Open  
Open  
H
.
Open  
For example, when P1 and P2 are both open,  
output voltage of channel 1 is 2.8V, and the  
output voltage of channel 2 is 3.3V.  
Power Dissipation  
The power dissipation for any package depends  
on the thermal resistance of the case and circuit  
board, the temperature difference between the  
junction and ambient air, and the rate of airflow.  
The power dissipation across the device can be  
represented by the equation:  
P = (VIN - VOUT) ×IOUT  
The allowable power dissipation can be  
calculated using the following equation:  
P(MAX) = (TJunction - TAmbient) / θJA  
Where (TJunction - TAmbient) is the temperature  
difference between the junction and the  
surrounding environment, θJA is the thermal  
resistance from the junction to the ambient  
environment. Connect the GND pin of MP20043  
to ground using a large pad or ground plane  
helps to channel heat away.  
Input Capacitor Selection  
Using a capacitor whose value is >0.47µF on  
the MP20043 input and the amount of  
capacitance can be increased without limit.  
MP20043 Rev.0.91  
10/10/2011  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2011 MPS. All Rights Reserved.  
12  
MP20043 –DUAL-CHANNEL, 300mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE  
PACKAGE INFORMATION  
TQFN8 (2mm×2mm)  
PIN 1 ID  
SEE DETAIL A  
1.90  
2.10  
0.25  
0.45  
0.45  
0.65  
PIN 1 ID  
MARKING  
0.18  
8
1
0.30  
1.90  
0.50  
1.05  
1.25  
PIN 1 ID  
INDEX AREA  
2.10  
BSC  
5
4
TOP VIEW  
BOTTOM VIEW  
PIN 1 ID OPTION A  
0.30x45º TYP.  
PIN 1 ID OPTION B  
R0.20 TYP.  
0.70  
0.80  
0.20 REF  
0.00  
0.05  
SIDE VIEW  
DETAIL A  
NOTE:  
1.90  
0.60  
0.70  
0.25  
1) ALL DIMENSIONS ARE IN MILLIMETERS.  
2) EXPOSED PADDLE SIZE DOES NOT INCLUDE MOLD FLASH.  
3) LEAD COPLANARITY SHALL BE0.10 MILLIMETER MAX.  
4) DRAWING CONFORMS TO JEDEC MO-229, VARIATION WCCD-3.  
5) DRAWING IS NOT TO SCALE.  
1.20  
0.50  
RECOMMENDED LAND PATTERN  
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.  
MP20043 Rev.0.91  
10/10/2011  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2011 MPS. All Rights Reserved.  
13  

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