MP20142
The Future of Analog IC Technology
Dual Channel, 200mA Linear
Regulator With Programmable
Output Voltage and Output Discharge
DESCRIPTION
FEATURES
The MP20142 is a dual-channel, low noise, low
dropout and high PSRR linear regulator with
programmable output voltage. The output
voltage of MP20142 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 200mA of load
current.
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•
•
•
•
•
•
•
•
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The MP20142 uses two internal P-channel
MOSFETs 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
MP20142 also features current limiting, output
discharge and over temperature protection.
Programmable Output Voltage
Up to 200mA Output Current (Each LDO)
60mV Dropout at 100mA Load
Dual Shutdown Pins Control Each Output
75dB PSRR at 1kHz
7µVRMS Low Noise Outputs
Current Limiting and Thermal Protection
Short Circuit Protection
Two LDOs in TQFN8 (2mm×2mm) Package
Output Load Discharge when Disabled
APPLICATIONS
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•
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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
MP20142 Rev.0.9
7/12/2010
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1
MP20142 –DUAL-CHANNEL, 200mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE
ORDERING INFORMATION*
Part Number*
Package
Top Marking
Free Air Temperature (TA)
MP20142DGT-LF-Z
TQFN8 (2mm×2mm)
AAY
-40°C to +85°C
ORDERING GUIDE*
MP20142DGT-LF-Z
Package Type
GT: TQFN (2mm x 2mm)
* For RoHS Compliant Packaging, add suffix - LF (e.g. MP20142DGT-LF);
For Tape and Reel, add suffix -Z (e.g. MP20142DGT-LF-Z).
PACKAGE REFERENCE
TOP VIEW
1
8
VOUT1
EN1
2
7
VOUT2
P2
3
6
GND
P1
4
5
EN2
GND
VIN
ABSOLUTE MAXIMUM RATINGS (1)
Recommended Operating Conditions
Supply Input Voltage .................................... 6V
All Other Pins ............................................ 5.5V
(2)
Power Dissipation, PD @ TA =25°C,
TQFN8 ...................................................... 1.5W
Storage Temperature Range ..... -65°C to 150°C
Lead Temperature (Soldering, 10sec) .....260°C
Thermal Resistance
ESD Susceptibility
HBM (Human Body Mode) .......................... 2kV
MM (Machine Mode) ................................. 200V
MP20142 Rev.0.9
7/12/2010
(3)
Supply Input Voltage ..................... 2.5V to 5.5 V
Operating Junct. Temp (TJ) ......-40°C to +125°C
(4)
TQFN8...............................
θJA
80
θJC
16 °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 TJ(MAX), the junction-toambient 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.
3) The device is not guaranteed to function outside of its
operating conditions.
4) Measured on JESD51-7 4-layer board.
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2
MP20142 –DUAL-CHANNEL, 200mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE
PROGRAMMABLE OUTPUT VOLTAGE SETTING
MP20142 Rev.0.9
7/12/2010
P1 State
P2 State
VOUT1
VOUT2
L
L
L
H
H
H
Open
Open
Open
L
H
Open
L
H
Open
L
H
Open
1.5V
1.5V
1.8V
2.6V
2.8V
2.8V
3.0V
3.0V
3.3V
1.8V
2.8V
3.0V
3.0V
3.0V
3.3V
3.0V
3.3V
3.3V
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3
MP20142 –DUAL-CHANNEL, 200mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE
ELECTRICAL CHARACTERISTICS
VIN = (VOUT+0.4V) or +2.5V, whichever is greater. CIN=COUT1=COUT2=1uF, EN1=EN2=VIN
Typical Value at TA = 25°C for each LDO, unless otherwise noted.
Parameter
Symbol
Output Voltage Accuracy
Maximum Output Current
Current Limit
∆VOUT
IMAX
ILIM
Quiescent Current
IG
Shutdown Supply Current
Dropout Voltage (5)
IGSD
VDROP
Line Regulation(6)
∆VLINE
Load Regulation(7)
∆VLOAD
EN Logic High
EN Logic Low
EN Input Bias Current
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
VIH
VIL
ISD
TSD
∆TSD
Output Voltage Noise
VNOISE
Output Voltage AC PSRR
Output
Voltage
Discharge
Resistance in Shutdown
Condition
Min
ILOAD=1mA
Continuous
Short circuit current limit
No Load (Single Channel)
No Load (Dual Channel)
EN1 = EN2 = GND
IOUT = 100mA
-2.5
200
VIN=(VOUT+0.4V) or 2.5V to
5.5V, IOUT=1mA
VOUT > 1.5V
VOUT ≤ 1.5V
VIN = 2.5V to 5.5V
VIN = 2.5V to 5.5V
EN = GND or VIN
P1/P2 Termination bias for
setting High, Low, Open States
VIN=2.5V
to 5.5V
High
state
bias current
Low state bias
current
Open state
Max
Units
2.5
1
120
%
mA
mA
µA
µA
µA
mV
0.1
%/V
1.2
1.8
140
10
%
%
V
V
nA
°C
°C
7
µVRMS
75
dB
75
dB
660
90
150
0.01
60
-
1.6
0.4
100
10Hz to 30kHz,
COUT=1µF, ILOAD=1mA
100Hz, COUT = 1µF,ILOAD =
200mA (Single Channel
loaded)
1kHz , COUT = 1µF,ILOAD =
200mA (Single Channel
loaded)
VIN=5V, EN1=EN2=GND
Typ
20
100
Ω
5
µA
-8
0.7
V
Notes:
5) Dropout Voltage is defined as the input to output differential when the output voltage drops 100mV below its nominal value.
6) Line Regulation =
VOUT ⎡ V
⎣
⎤
IN(MAX ) ⎦
− VOUT ⎡ V
⎣
⎤
IN(MIN) ⎦
⎡V
− VIN(MIN) ⎤ × VOUT(NOM)
⎣ IN(MAX )
⎦
7) Load Regulation =
VOUT ⎡I
⎤
⎣ OUT (MAX ) ⎦
− VOUT ⎡I
VOUT (NOM)
MP20142 Rev.0.9
7/12/2010
⎤
⎣ OUT(MIN) ⎦
× 100(% / V)
× 100(%)
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MP20142 –DUAL-CHANNEL, 200mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE
PIN FUNCTIONS
Pin #
Name
1
2
3
4
5
6
7
8
VIN
EN1
P2
P1
EN2
GND
VOUT2
VOUT1
MP20142 Rev.0.9
7/12/2010
Description
Supply Input Pin
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
Channel 2 Output Voltage
Channel 1 Output Voltage
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MP20142 –DUAL-CHANNEL, 200mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 3.7V, P1 High, P2 Open (VOUT1=2.8V, VOUT2=3.3V), CIN = COUT1= COUT2=1µF, EN1=EN2= VIN
TA = +25ºC, unless otherwise noted.
1200
Ground Pin Current vs.
Input Voltage
Ground Pin Current vs.
Temperature
180
1200
Dropout Voltage vs.
Output Current
160
1000
1000
800
800
600
600
400
400
200
200
140
120
100
Channel 1
80
60
40
Both Channels Loaded
0
3.5
4
4.5
5
Both Channels Loaded
0
-40 -20
5.5
0
20
40
60
Channel 2
20
0
80 100
0
50
100
150
200
INPUT VOLTAGE(V)
Dropout Voltage vs.
Temperature
1.5
180
Enable Threshold vs.
Input Voltage (Channel 1)
160
1.5
Channel 1
1.4
1.3
Channel 2
1.1
1.0
0.9
60
0.8
40
0.7
20
0
-40 -20
0.6
0
20
40
60
0.5
80 100
EN High Threshold
1.2
VEN(V)
VEN(V)
100
80
EN High Threshold
1.2
Channel 1
120
Channel 2
1.4
1.3
140
Enable Threshold vs.
Input Voltage (Channel 2)
1.1
1.0
0.9
0.8
0.7
EN Low Threshold
3.5
4
4.5
5
EN Low Threshold
0.6
5.5
0.5
3.5
4
INPUT VOLTAGE(V)
1.5
1.4
1.5
Channel 1, VIN=3.7V
1.2
EN High Threshold
0.9
0.8
0.7
0.6
0.5
-40 -20
EN Low Threshold
0
20 40
60 80 100
1.2
1.1
1.0
5.5
800
Channel 2
700
1.3
EN VOLTAGE(V)
EN VOLTAGE(V)
1.3
1.1
1.0
Channel 2, VIN=3.7V
1.4
5
Cuurent Limit vs.
Input Voltage
Enable Threshold vs.
Temperature (Channel 2)
Enable Threshold vs.
Temperature (Channel 1)
4.5
INPUT VOLTAGE(V)
600
EN High Threshold
Channel 1
500
0.9
0.8
EN Low Threshold
0.7
400
300
0.6
0.5
-40 -20
0
20
40
60
80 100
200
3
3.5
4
4.5
5
5.5
INPUT VOLTAGE(V)
MP20142 Rev.0.9
7/12/2010
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MP20142 –DUAL-CHANNEL, 200mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 3.7V, P1 High, P2 Open (VOUT1=2.8V, VOUT2=3.3V), CIN = COUT1= COUT2= 1µF, EN1=EN2= VIN
TA = +25ºC, unless otherwise noted.
800
700
VIN=3.7V
Channel 2
600
Channel 1
500
400
300
200
-40 -20
0
20
40
60
80 100
Line Regulation
0.20%
VIN=3.7V
0.15%
0.10%
0.05%
Channel 2
0.00%
-0.05%
-0.10%
Channel 1
-0.15%
-0.20%
3
3.5
4
4.5
5
5.5
OUTPUT VOLTAGE ACCURACY(%)
Load Regulation
OUTPUT VOLOTAGE ACCURACY(%)
Current Limit vs.
Temperature
0.20%
0.15%
0.10%
0.00%
-0.05%
-0.10%
Channel 1
-0.15%
-0.20%
3.0
INPUT VOLTAGE(V)
OUTPUT VOLTAGE ACCURACY(%)
Output Voltage Accuracy
PSRR
VIN=3.7V, IOUT=1mA
0.10
80
60
0.00
40
5.5
100
(For Both Channels)
Channel 1
10
Unstable Region
Channel 2
Channel 2
Channel 2
1
20
IOUT=200mA,
0 Single
Channel loaded
-0.10
-0.15
-40 -20
3.5
4.0
4.5
5.0
INPUT VOLTAGE(V)
Channel 1
0.05
-0.05
IOUT=1mA
COUT ESR Stability vs.
Ouput Current
100
0.15
Channel 2
0.05%
0
20
40
60
80 100
-20
10 100
Channel 1
Stable Region
0.1
1k 10k 100k 1M 10M
FREQUENCY (Hz)
0
50
100
150
200
Channel to Channel Isolation
vs. Frequency
60
50
40
30
20
10
0
-10
10 100 1k 10k 100k 1M 10M
FREQUENCY (Hz)
MP20142 Rev.0.9
7/12/2010
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MP20142 –DUAL-CHANNEL, 200mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 3.7V, P1 High, P2 Open (VOUT1=2.8V, VOUT2=3.3V), CIN = COUT1= COUT2= 1µF, EN1=EN2= VIN
TA = +25ºC, unless otherwise noted.
Input Power Up
Input Power Down
Input Power Up
VIN=3.7V, No Load
VIN=3.7V, No Load
VIN=3.7V, IOUT1=IOUT2=200mA
with Resistive Load
VIN
2V/div
VIN
2V/div
VIN
2V/div
VOUT1
2V/div
VOUT1
2V/div
VOUT1
2V/div
IOUT1
200mA/div
VOUT2
2V/div
VOUT2
2V/div
VOUT2
2V/div
IOUT1/IOUT2
200mA/div
IOUT1/IOUT2
200mA/div
200ms/div
IOUT2
200mA/div
200ms/div
200ms/div
Input Power Down
EN Start Up
EN Shut Down
VIN=3.7V, IOUT1=IOUT2=200mA
with Resistive Load
VIN=3.7V, IOUT1=IOUT2=200mA
with Resistive Load
VIN=3.7V, IOUT1=IOUT2=200mA
with Resistive Load
VIN
2V/div
VOUT1
2V/div
IOUT1
200mA/div
VOUT2
2V/div
IOUT2
200mA/div
200ms/div
EN
2V/div
EN
2V/div
VOUT1
2V/div
VOUT1
2V/div
IOUT1
200mA/div
VOUT2
2V/div
IOUT1
200mA/div
VOUT2
2V/div
IOUT2
200mA/div
IOUT2
200mA/div
Line Transient (Ch1)
Line Transient (Ch2)
Load Transient (Ch1)
VIN=3.7V to 4.7V, IOUT1=200mA
with Resistive Load
VIN=3.7V to 4.7V, IOUT2=200mA
with Resistive Load
VIN=3.7V, IOUT1=1mA to 200mA
with Resistive Load
VIN
1V/div
VIN
1V/div
VOUT1 (AC)
10mV/div
VOUT2 (AC)
10mV/div
IOUT1
200mA/div
IOUT2
200mA/div
MP20142 Rev.0.9
7/12/2010
VOUT1 (AC)
100mV/div
IOUT1
200mA/div
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MP20142 –DUAL-CHANNEL, 200mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 3.7V, P1 High, P2 Open (VOUT1=2.8V, VOUT2=3.3V), CIN = COUT1= COUT2= 1µF, EN1=EN2= VIN
TA = +25ºC, unless otherwise noted.
Load Transient (Ch2)
OCP Start Up
OCP Start Up
VIN=3.7V, IOUT2=1mA to 200mA
with Resistive Load
VIN=3.7V, Short VOUT1 to GND
before Start Up
VIN=3.7V, Short VOUT2 to GND
before Start Up
VOUT1 (AC)
100mV/div
IOUT1
200mA/div
VIN
2V/div
VOUT2
2V/div
VIN
2V/div
VOUT1
2V/div
VOUT1
2V/div
VOUT2
2V/div
100ms/div
OCP Recovery
OCP Recovery
VIN=3.7V, Remove the Over
Current Condition of Channel 1
VIN=3.7V, Remove the Over
Current Condition of Channel 2
VIN
2V/div
VIN
2V/div
VOUT2
2V/div
VOUT1
2V/div
VOUT1
2V/div
VOUT2
2V/div
40ms/div
MP20142 Rev.0.9
7/12/2010
100ms/div
20ms/div
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MP20142 –DUAL-CHANNEL, 200mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE
FUNCTION BLOCK DIAGRAM
Figure1—Function Block Diagram
MP20142 Rev.0.9
7/12/2010
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MP20142 –DUAL-CHANNEL, 200mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE
OPERATION
The MP20142 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 200mA. The part uses
internal P-channel MOSFETs as the pass
elements and features internal thermal
shutdown and internal current limit.
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 P-channel
MOSFETs pass element behaves as a lowvalue resistor, the dropout voltage of MP20142
is very low.
Shutdown
The MP20142 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
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 MP20142 includes two independent current
limit structures which monitor and control each
P-channel MOSFET’s gate voltage limiting the
guaranteed maximum output current to 660mA.
Thermal Protection
Thermal protection turns off the P-channel
MOSFETs when the junction temperature
exceeds +140ºC, allowing the IC to cool. When
the IC’s junction temperature drops by 10ºC,
the P-channel MOSFETs will be turned on
again. Thermal protection limits total power
dissipation in the MP20142. For reliable
operation, the junction temperature should be
limited to 125 ºC maximum.
Internal P-Channel Pass Device
The MP20142 features dual typical 0.6Ω Pchannel MOSFET pass devices. It provides
several advantages over similar designs using
PNP pass transistors, including longer battery
life.
Output Discharge
The part involves a discharge function that
provides a resistive discharge path for the
external output capacitor. The function will be
active when the part is disabled and it will be
done in a very limited time.
MP20142 Rev.0.9
7/12/2010
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11
MP20142 –DUAL-CHANNEL, 200mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE
APPLICATION INFORMATION
Output Voltage
The
output
voltage
of
MP20142
is
programmable with setting different states of P1
PIN and P2 PIN. The setting rule is as the
following table:
Input Capacitor Selection
Using a capacitor whose value is >0.47µF on
the MP20142 input and the amount of
capacitance can be increased without limit.
P1 State
P2 State
VOUT1
VOUT2
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.
L
L
L
H
H
H
Open
Open
Open
L
H
Open
L
H
Open
L
H
Open
1.5V
1.5V
1.8V
2.6V
2.8V
2.8V
3.0V
3.0V
3.3V
1.8V
2.8V
3.0V
3.0V
3.0V
3.3V
3.0V
3.3V
3.3V
Output Capacitor Selection
The MP20142 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 1Ω is suitable
for the MP20142 application circuit. Output
capacitor of larger values will help to improve
load transient response and reduce noise with
the drawback of increased size.
Table 1 Programmable Output Voltage
Setting
For example, when P1 and P2 are both open,
output voltage of channel 1 is 3.3V, 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
calculated using the following equation:
P(MAX) = (TJunction - TAmbient) / θJA
be
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 MP20142
to ground using a large pad or ground plane
helps to channel heat away.
MP20142 Rev.0.9
7/12/2010
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12
MP20142 –DUAL-CHANNEL, 200mA LDO WITH PROGRAMMABLE OUTPUT VOLTAGE
PACKAGE INFORMATION
TQFN8 (2mm×2mm)
PIN 1 ID
MARKING
1.90
2.10
0.25
0.45
0.18
0.30
1.90
2.10
PIN 1 ID
INDEX AREA
PIN 1 ID
SEE DETAIL A
0.45
0.65
8
1
1.05
1.25
0.50
BSC
5
TOP VIEW
4
BOTTOM VIEW
0.70
0.80
PIN 1 ID OPTION A
0.30x45º TYP.
PIN 1 ID OPTION B
R0.20 TYP.
0.20 REF
0.00
0.05
SIDE VIEW
DETAIL A
NOTE:
1.90
0.70
0.60
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 WCCD-3.
5) DRAWING IS NOT TO SCALE.
0.25
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.
MP20142 Rev.0.9
7/12/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
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