MP20048
Capacitor-Free, 250mA,
Low Dropout Voltage Regulator
The Future of Analog IC Technology
FEATURES
DESCRIPTION
•
The MP20048 is a kind of new low-dropout
(LDO) voltage regulators which uses an NMOS
as the pass element in a voltage-follower
configuration. It can get any value of output
from 1.234V to 5V. The benefit of this product is
that it can operate without any capacitors.
•
•
•
•
•
•
The MP20048 uses an advanced BICMOS
process to yield high precision. It also delivers
very low dropout voltage and low ground pin
current. It integrates the thermal-off and current
limit block to protect the devices from damage.
The MP20048 is available in a TSOT23-5
package.
Stable with No Output Capacitor or Any
Capacitors
Input Voltage Range: 1.7V to 5.5V
Output Voltage Range:1.234V to 5V
62.5mV Dropout at 250mA Load
1% Accuracy for Initial Reference
Thermal off and Current Limit Protection
Available in a TSOT23-5 package
APPLICATIONS
•
•
•
•
VCOs
Portable/Battery-Powered Equipment
Post-Regulation for Switching Supplies
Point of Load Regulation for DSPs, FPGAs,
ASICs, and Microprocessors
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VOUT
VIN
IN
C1
OUT
R1
MP20048
EN
GND
FB
R2
Typical Application Circuit
VIN
IN
C1
R1
MP20048
EN
VOUT
OUT
GND
FB
C3
C2
(optional)
(optional)
R2
Typical Application Circuit with optional output cap and feedforward cap
MP20048 Rev. 0.91
4/6/2010
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1
MP20048 – CAPACITOR-FREE, 250mA, LOW DROPOUT VOLTAGE REGULATOR
ORDERING INFORMATION
Part Number*
Package
Top Marking
Free Air Temperature (TA)
MP20048DJ
TSOT23-5
3B
–40°C to +85°C
*For Tape & Reel, add suffix –Z (eg. MP20048DJ-Z)
For Lead Free, add suffix –LF (eg.MP20048DJ–LF–Z)
PACKAGE REFERENCE
IN
OUT
GND
FB
EN
ABSOLUTE MAXIMUM RATINGS (1)
Thermal Resistance
Supply Input Voltage .................................... 6V
(2)
Power Dissipation, PD @ TA =25°C
................................................................. 0.45W
Operating Junct. Temp (TJ) ....... -40°C to 125°C
Storage Temperature Range ..... -65°C to 150°C
Lead Temperature (Soldering, 10sec) .....260°C
TSOT23-5.............................. 220 .... 110. . °C/W
ESD Susceptibility
(3)
HBM (Human Body Mode) .......................... 2kV
MM (Machine Mode) .................................. 500V
Recommended Operating Conditions
(4)
Supply Input Voltage.......................1.7V to 5.5V
Enable Input Voltage .........................0V to 5.5V
Junction Temperature ............................+125°C
MP20048 Rev. 0.91
4/6/2010
(5)
θJA
θJC
Notes:
1) Exceeding these ratings may cause permanent damage to
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) Devices
are
ESD
sensitive.
Handling
precaution
recommended.
4) The device is not guaranteed to function outside its operating
conditions.
5) Measured on JESD51-7 4-layer board.
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MP20048 – CAPACITOR-FREE, 250mA, LOW DROPOUT VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS (6)
VIN = VOUT(nom)+0.5V(6), VOUT=2.5V, VEN=1.7V, C2=0.1μF, TA = 25°C, unless otherwise noted.
VIN
Parameters
Input voltage range (6)
VFB
VOUT
ΔVOUT%/ΔVI
N
ΔVOUT%/ΔIO
UT
VDO
Test Condition
Internal reference
TA=25℃
Accuracy
Output voltage range(7)
1.247
V
-1.0
+1.0
%
VFB
5.5ZO(DO)*
IOUT
V
1mA≤IOUT≤250mA
0.0005
%/mA
IOUT=250mA
62.5
mV
1.7V≤VIN≤5.5V
0.25
Ω
450
430
350
500
800
mA
mA
μA
μA
0.01
1
μA
6.5
μA
(10)
ISHDN
ILEAK
Output leakage
VEN≤0.5V,VOUT≤VIN≤5.5V
-40℃≤TJ≤+125℃
Power-supply rejection
ratio
(ripple rejection)
IOUT=250mA
TJ
1.234
Load regulation(9)
Shutdown
(IGND)
TSD
1.221
%/V
Ground pin current
tSTR
VEN(HI)
VEN(LO)
Unit
V
0.01
IGND
VN
Max
5.5
1.7V≤VIN≤5.5V
ICL
ISC
PSRR
Typ
Line regulation(8)
Dropout Voltage
Output impedance in
dropout
Output current limit
Short-circuit current
ZO(DO)
Min
1.7
VOUT=0.9×VOUT(nom)
VOUT=0V
IOUT=10mA
IOUT=100mA
current
Output noise voltage
BW=10Hz—100kHz
Startup time
Enable high (enabled)
Enable low (shutdown)
Thermal
shutdown
temperature
Operating
junction
temperature
270
VEN≤0.5V,VOUT≤VIN≤5.5V
f=100Hz
48
f=10kHz
23
dB
C2=10μF,No C3
C2=10μF, C3=0.01μF
VOUT=2.5V, RL=25Ω,C2=1μF
48
37
0.5
1.7
0
Shutdown Temp increasing
Reset Temp decreasing
μVRMS
VIN
0.5
+140
+130
125
ms
V
V
℃
℃
℃
Notes:
6) Minimum VIN=VOUT+VDO or 1.7V
7) This version is tested at VOUT=2.5V
VOUT[VIN(MAX) ] − VOUT[VIN(MIN) ]
8) Line Regulation =
× 100(%/V)
[VIN(MAX) − VIN(MIN) ] × VOUT(NOM)
9)
Load Regulation =
VOUT[IOUT(MAX) ] − VOUT[IOUT(MIN) ]
VOUT(NOM)
× 100(%)
10) Dropout voltage is defined as the input to output differential when the output voltage drops 100mV below its nominal value.
MP20048 Rev. 0.91
4/6/2010
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© 2010 MPS. All Rights Reserved.
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MP20048 – CAPACITOR-FREE, 250mA, LOW DROPOUT VOLTAGE REGULATOR
PIN FUNCTIONS
Package Pin #
Name
Description
1
2
3
4
5
IN
GND
EN
FB
OUT
Regulator Input. Supply voltage ranges from +1.7V to 5.5V.
Ground
Positive polarity enable(EN) input
Feedback voltage for setting output voltage of the device.
Regulator output. It can be stable without output capacitor
MP20048 Rev. 0.91
4/6/2010
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MP20048 – CAPACITOR-FREE, 250mA, LOW DROPOUT VOLTAGE REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS
VIN=3V, VOUT=2.5V, VEN=1.7V,C1=1uF,C2=0.1uF, no C3,TA=25oC, unless otherwise noted
Ground Pin Current vs.
Temperature
600
IOUT=250mA
550
500
IOUT=10mA
450
400
350
300
-40 -20
0
20
40
60
700
80
DR O P O UT V O L T A G E (mV )
G R O UND P IN C UR R E NT (uA )
600
500
400
300
200
100
0
0
80 100
50
70
1.2
40
1.1
30
20
EN high threshold
1
0.9
EN low threshold
2 2.5
OUTPUT CURRENT(mA)
500
C UR R E NT L IMIT (mA)
500
400
300
200
100
0
-40 -20
3 3.5
4 4.5
20
40
60
TEMP ER ATUR E(OC)
MP20048 Rev. 0.91
4/6/2010
80 100
VIN=5.5V
1.1
VIN=1.7V
0.5
-40 -20
5 5.5
300
200
100
3.5
4
4.5
20
40
60
80 100
Line Regulation
400
3
0
TEMP ER ATUR E(OC)
0
0
80 100
EN low threshold
1.3
Current Limit vs.
Input Voltage
600
60
EN high threshold
INPUT VOLTAGE(V)
600
40
0.7
0.5
1.5
Current Limit vs.
Temperature
20
VOUT=1.25V
0.9
0.6
250
0
1.5
0.7
10
200
IOUT=250mA
10
1.7
0.8
150
20
EN threshold vs.
Temperature
VEN(V)
50
100
30
1.9
1.3
50
40
TEMP ER ATUR E(OC)
1.4
60
0
50
0
-40 -20
250
1.5
VEN(V)
DR OP OUT VOL T A G E (mV)
200
60
EN threshold vs.
Input Voltage
Dropout Voltage vs.
Output Current
C UR R E NT L IMIT (mA)
150
70
OUTPUT CURRENT(mA)
TEMP ER ATUR E(OC)
0
100
5
5.5
OUTPUT VOLTAGE ACCURACY(%)
G R OU ND P IN C U R R E NT(uA )
650
Dropout Voltage vs.
Temperature
Ground Pin Current vs.
Output Current
0.20
0.15
0.10
0.05
0.00
-0.05
-0.10
-0.15
-0.20
IOUT=10mA
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE(V)
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INPUT VOLTAGE(V)
5
MP20048 – CAPACITOR-FREE, 250mA, LOW DROPOUT VOLTAGE REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS(continued)
VIN=3V, VOUT=2.5V, VEN=1.7V, C1=1uF,C2=0.1uF, no C3,TA=25oC, unless otherwise noted.
Output Voltage Accuracy vs.
Temperature
0.1
0.0
-0.1
-0.2
-0.3
-0.4
0
50
100
150
200
OUTP UT CUR R ENT(mA)
MP20048 Rev. 0.91
4/6/2010
250
0. 8
PSRR
100
0. 6
80
0. 4
60
0. 2
PSRR(dB)
0.2
OUT P UT V OL T AG E AC C UR AC Y (% )
OU TP U T V OL TA G E A C C U R A C Y (% )
Load Regulation
0. 0
-0. 2
40
20
-0. 4
0
-0. 6
-0. 8
-40 -20
0
20
40
60
80 100
-20
10
102
TEMP ER ATUR E(OC)
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103
104
105
106
107
FREQUENCY(Hz)
6
MP20048 – CAPACITOR-FREE, 250mA, LOW DROPOUT VOLTAGE REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS(continued)
VIN=3V, VOUT=2.5V, VEN=1.7V, C1=1uF,C2=0.1uF, no C3,TA=25oC, unless otherwise noted.
Input Power Start Up
with Resistive Load
Input Power Shut Down
with Resistive Load
IOUT=250mA
IOUT=250mA
EN Start Up
with Resistive Load
IOUT=250mA
VIN
1V/div.
VIN
1V/div.
VEN
1V/div.
VOUT
1V/div.
IOUT
200mA/div.
VOUT
1V/div.
IOUT
200mA/div.
VOUT
1V/div.
IOUT
200mA/div.
2ms/div.
2ms/div.
EN Shut Down
with Resistive Load
IOUT=250mA
40us/div.
Line Transient
with Resistive Load
Load Transient
with Resistive Load
VIN=3.5V-4.5V, VOUT=2.50V,
C1=0, IOUT=250mA
IOUT=10mA-250mA
VOUT/AC
500mV/div.
VEN
1V/div.
VOUT
2V/div.
VIN
1V/div.
VOUT/AC
100mV/div.
IOUT
200mA/div.
2us/div.
IOUT
200mA/div.
200us/div.
40us/div.
MP####-TPC##
Over Current Protection
Steady State
Over Current Protection
Entry
Over Current Protection
Recovery
VIN
2V/div.
VOUT
2V/div.
VIN
1V/div.
VOUT
1V/div.
VIN
2V/div.
VOUT
2V/div.
IOUT
200mA/div.
IOUT
200mA/div.
IOUT
200mA/div.
1s/div.
MP20048 Rev. 0.91
4/6/2010
40ms/div.
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200ms/div.
7
MP20048 – CAPACITOR-FREE, 250mA, LOW DROPOUT VOLTAGE REGULATOR
BLOCK DIAGRAM
IN
Charge
Pump
EN
Ref
Bandgap
Thermal
Protection
4k
+
Error Amp
Error
Amp
+
OUT
GND
Current
Limit
FB
Figure1—Functional Block Diagram
OPERATION
The MP20048 is a kind of new low-dropout
(LDO) voltage regulators which uses an NMOS
as the pass element in a voltage-follower
configuration. The highlight of this topology is
the stability even without outside capacitor. It
can get any value of output between 1.234V to
5V.
The MP20048 uses an advanced BICMOS
process to yield high precision. It also delivers
very low dropout voltages and low ground pin
current and features the thermal-off and current
limit block to protect the devices from damage.
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 NMOS pass
element behaves as a low-value resistor, the
dropout voltage of MP20048 is very low.
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 pin.
Current Limit
The MP20048 includes a current limit structure
which monitors and controls NMOS’s gate
voltage to limit the guaranteed maximum output
current to 450mA.
Thermal Protection
Thermal protection turns off the NMOS when
the junction temperature exceeds +140ºC,
allowing the IC to cool. When the IC’s junction
temperature drops by 10ºC, the NMOS will be
turned on again. Thermal protection limits total
power dissipation in the MP20048. For reliable
operation, junction temperature should be
limited to 125 ºC maximum.
Enable Pin and Shutdown
The MP20048 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
MP20048 Rev. 0.91
4/6/2010
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MP20048 – CAPACITOR-FREE, 250mA, LOW DROPOUT VOLTAGE REGULATOR
APPLICATION INFORMATION
Setting the Output Voltage
The output voltage of MP20048 can get any
value of output between 1.234V to 5V. The
voltage divider divides the output voltage down
to the feedback voltage by the ratio:
VFB = VOUT
R2
R1 + R2
Where VFB is the feedback threshold voltage
(VFB = 1.234V), and VOUT is the output voltage.
Thus the output voltage is:
VOUT = 1.234 ×
R1 + R2
R2
The MP20048 does not require the output
capacitor for stable operation. It is specifically
designed to be stable with any type and value
capacitor including ceramic and electrolytic.
Although an output capacitor is not required for
stability, the output capacitor, C2, is optional to
be connected at the output side. (Figure 2)
Output capacitor of larger values will help to
improve load transient response and reduce
output noise with the drawback of increasing
size.
Output Noise
R2 can be as high as 100kΩ, but a typical value
is 10kΩ. Using that value, R1 is determined by:
⎛V
− VFB
R1 = R2 × ⎜⎜ OUT
V
FB
⎝
Output Capacitor Selection
⎞
⎟⎟
⎠
For example, for a 2.5V output voltage, R2 is
10kΩ, and R1 is 10.2kΩ. You can select a
standard 10.2kΩ (±1%) resistor for R1.
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 air flow.
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:
A precision bandgap reference is used to
generate the internal reference voltage, VREF,
which is the dominant noise source within the
MP20048. It is optional to connect a feed
forward capacitor, C3, from the output to
feedback to improve load transient performance.
This capacitor, C3, should be limited to be less
than 0.1uF. (Figure 2)
VIN
IN
C1
R1
MP20048
EN
VOUT
OUT
GND
FB
C3
C2
(optional)
(optional)
R2
Figure2. Typical Application Circuit with
optional output cap and feedforward cap
be
P(MAX) = (TJunction − TAmbient ) / θ JA
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.
MP20048 Rev. 0.91
4/6/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
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MP20048 – CAPACITOR-FREE, 250mA, LOW DROPOUT VOLTAGE REGULATOR
PACKAGE INFORMATION
TSOT23-5
0.95
BSC
0.60
TYP
2.80
3.00
5
4
1.20
TYP
1.50
1.70
1
2.60
TYP
2.60
3.00
3
TOP VIEW
RECOMMENDED LAND PATTERN
0.84
0.90
1.00 MAX
0.09
0.20
SEATING PLANE
0.30
0.50
0.95 BSC
0.00
0.10
SEE DETAIL "A"
FRONT VIEW
SIDE VIEW
NOTE:
GAUGE PLANE
0.25 BSC
0.30
0.50
0o-8o
DETAIL A
1) ALL DIMENSIONS ARE IN MILLIMETERS.
2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,
PROTRUSION OR GATE BURR.
3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH
OR PROTRUSION.
4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING)
SHALL BE 0.10 MILLIMETERS MAX.
5) DRAWING CONFORMS TO JEDEC MO-193, VARIATION AA.
6) DRAWING IS NOT TO SCALE.
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.
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.
MP20048 Rev. 0.91
4/6/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
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