MP20045
Low Noise, 1A
Linear Regulator
DESCRIPTION
The MP20045 is a low-dropout linear regulator
supplies up to 1A current with 140mV dropout
voltage. The output voltage is set externally
which ranges from 1.5V to 5V by operating from
+2.5V to +5.5V input or can be preset internally
from 1.5V to 5V.
An internal PMOS pass element is used to
allow a low 110μA ground current, making the
MP20045 suitable for battery-power devices.
Other features include low-power shutdown,
short-circuit and thermal protection. The
MP20045 is available in 8-pin QFN (3mm x
3mm) and SOIC8E packages.
FEATURES
Up to 1A Output Current
Low 140mV Dropout at 1A
Low 110μA Ground Current
Fixed Output Versions Ranging from 1.5V to
5V and Adjustable Versions
Open Drain Power-Good Status Output
13μV
RMS
Low Noise Output
56dB PSRR at 1kHz
Current Limiting and Thermal Protection
3mm×3mm QFN8 and SOIC8E Packages
APPLICATIONS
Notebook Computers
Cordless Telephones
Cellular Phones
Modems
Hand-Held Instruments
PDA and Palmtop Computers
All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For
MPS green status, please visit MPS website under Quality Assurance. “MPS”
and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
Fixed Version
Adjustable Version
MP20045 Rev. 1.01
www.MonolithicPower.com
4/21/2017
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
1
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
ORDERING INFORMATION
Part Number*
MP20045DQ**
MP20045DQ-15**
MP20045DQ-18**
MP20045DQ-25**
MP20045DQ-33**
MP20045DN**
MP20045DN-18**
Output Voltage
Adjustable
1.5V
1.8V
2.5V
3.3V
Adjustable
1.8V
Package
QFN8 (3mm x 3mm)
QFN8 (3mm x 3mm)
QFN8 (3mm x 3mm)
QFN8 (3mm x 3mm)
QFN8 (3mm x 3mm)
SOIC8E
SOIC8E
Top Marking
8K
2V
3V
9Z
2S
M20045DN
20045-18
Free Air Temperature (T
A
)
-40C to +85C
* For fixed output voltage versions between 1.5V and 5V, add suffix –XX (e.g. MP20045DQ-33 is the 3.3V fixed
output). Contact factory for availability.
** For Tape & Reel, add suffix –Z (e.g. MP20045DQ–Z, MP20045DN–Z);
For RoHS compliant packaging, add suffix –LF (e.g. MP20045DQ–LF–Z, MP20045DN–LF–Z).
PACKAGE REFERENCE
QFN8 (3mm x 3mm)
SOIC8E
ABSOLUTE MAXIMUM RATINGS
(1)
VIN, EN, PG, FB to GND ............... -0.3V to +6V
OUT to GND ......................... -0.5V to V
IN
+ 0.5V
Continuous Power Dissipation (T
A
=+25C)
(2)
QFN8 (3x3) ......................................................2.0W
SOIC8E ............................................................2.0W
Free Air Temperature (T
A
) .............. -40° to 85°
C
C
Storage Temperature Range ..... -65° to 150°
C
C
Lead Temperature (Soldering, 10sec)...........260°
C
Thermal Resistance
(4)
θ
JA
θ
JC
QFN8 (3x3) ............................. 50 ...... 12 ...
C/W
SOIC8E .................................. 50 ...... 10 ...
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 JESD51-7 4-layer board.
ESD Susceptibility
HBM (Human Body Mode) ........................... 2kV
MM (Machine Mode) ..................................200V
Recommended Operating Conditions
(3)
Supply Input Voltage ...................... 2.5V to 5.5V
Enable Input Voltage ........................ 0V to 5.5V
Operating Junct. Temp (T
J
) ...... -40C to +125C
MP20045 Rev. 1.01
www.MonolithicPower.com
4/21/2017
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
2
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
ELECTRICAL CHARACTERISTICS
V
IN
=V
OUT
+0.5V or V
IN
=2.5V, EN=V
IN
, Typical values are at T
A
=+25° unless otherwise specified
C,
Parameter
Input Voltage
Input Under voltage Lockout
Hysteresis of UVLO
FB Accuracy
Adjustable
1.5V
Output Voltage 1.8V
Accuracy
2.5V
3.3V
Maximum Output Current
Short-Circuit Current Limit
In-Regulation Current Limit
Ground Current
Dropout Voltage
(5)
Line Regulation
(6)
Load Regulation
(7)
Output Voltage Noise
PSRR
Shutdown Supply Current
EN PIN Threshold
EN pin PULL-UP resistor
Thermal Shutdown Temperature
Minimum input voltage
Trip threshold voltage
Condition
V
IN
rising
I
OUT
=1mA
I
OUT
=1mA, 2.5V<V
IN
<5.5V
I
OUT
=1mA, 2.5V<V
IN
<5.5V
I
OUT
=1mA, 3V<V
IN
<5.5V
I
OUT
=1mA, 3.8V<V
IN
<5.5V
Continuous, V
IN
>=3V
V
OUT
=0, V
IN
>=3V
V
OUT
within 4% of normal output
voltage V
IN
=5.5V
I
OUT
=100μA
I
OUT
=1A
V
IN
from V
OUT
+0.5V to 5.5V,
I
OUT
=5mA
I
OUT
from 1mA to 1A
V
IN
=3.3V, V
OUT
=2.8V, C
OUT
=2.2μF,
I
OUT
=100mA, f ranges from 10Hz to
100kHz
At 1kHz, I
OUT
=250mA
V
IN
=+5.5V
EN Logic High
EN Logic Low
Typical thermal hysteresis =20°
C
I
OUT(PG)
=300μA
MP20045
MP20045-15
MP20045-18
V
OUT
decreasing
MP20045-25
MP20045-33
Measured at V
OUT
I
OUT(PG)
=1mA
V
(PG)
=5.5V
1.5
0.4
550k
1.1M
150
1.1
Min
2.5
2.0
-2.5
-2.5
-2.5
-2.5
-2.5
1
1.6
1.4
2.2
110
140
-0.15
-0.3
13
56
5
16
3.0
280
0.15
Typ
Max
5.5
2.3
2.5
2.5
2.5
2.5
2.5
Units
V
V
mV
%
160
A
A
A
μA
mV
%/V
%
μV
RMS
dB
μA
V
Ω
°
C
V
1.3
86
83
80
77
6
0.15
%V
OUT
PG
Hysteresis voltage
Output low voltage
Leakage current
0.4
1
%V
OUT
V
μA
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=
V
OUT
V
IN(MAX )
V
OUT
V
IN(MIN)
V
V
IN(MIN)
V
OUT(NOM)
IN
MAX
7) Load Regulation=
100(% / V)
V
OUT
I
OUT(MAX )
V
OUT
I
OUT(MIN)
V
OUT
NOM
100(%)
MP20045 Rev. 1.01
www.MonolithicPower.com
4/21/2017
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
3
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
PIN DESCRIPTION
QFN8 (3X3)
Pin #
1, 2
SOIC8E
Pin #
7, 8
Name
VIN
Description
Regulator Input. Supply voltage ranges from +2.5V to 5.5V. Bypass with
2.2μF capacitor. These pins must be externally connected for proper
operation even if they are internally connected.
Regulator output. Bypass with a 2.2μF low-ESR capacitor to GND.
Connect all the pin together externally.
Feedback Input.
For the adjustable output version, connect FB to the center point of the
external resistor divider. The feedback threshold voltage is 1.5V.
For the fixed output version, connect FB to the output directly.
Ground. Connect exposed pad to GND plane for optimal thermal
performance.
Open-drain power-good (PG) output.
Positive polarity enable (EN) input. Regulator Enable Control Input. Drive
EN above 1.5V to turn on the MP20045. Drive EN below 0.4V to turn it off.
Do not float the EN pin.
3, 4
1, 2
VOUT
5
3
FB
6
7
8
4
5
6
GND
Expose
d pad
PG
EN
MP20045 Rev. 1.01
www.MonolithicPower.com
4/21/2017
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
4
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
=3.3V, V
OUT
=2.8V, C
IN
=C
OUT
=2.2μF, T
A
=25° unless otherwise noted
C,
MP20045 Rev. 1.01
www.MonolithicPower.com
4/21/2017
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
5
