MPS MP20045DQ Low noise, 1a linear regulator Datasheet

MP20045
Low Noise, 1A
Linear Regulator
The Future of Analog IC Technology
DESCRIPTION
FEATURES
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.
•
•
•
•
•
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
13µVRMS 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
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
R3
100k
VIN
VOUT
R3
100k
CIN
PG
MP20045 FB
EN
CIN
R1
PG
COUT
2.2
VOUT
MP20045 FB
R2
EN
VOUT =1.5 × (1+
Fixed Version
MP20045 Rev. 1.0
10/13/2010
C3(Optional)
0.1nF
COUT
2.2
R1
)Volts
R2
Adjustable Version
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1
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
ORDERING INFORMATION
Part Number*
MP20045DQ**
MP20045DQ-15**
MP20045DQ-18**
MP20045DQ-25**
MP20045DQ-33**
MP20045DN**
MP20045DN-15**
MP20045DN-18**
MP20045DN-25**
MP20045DN-33**
Output Voltage
Adjustable
1.5V
1.8V
2.5V
3.3V
Adjustable
1.5V
1.8V
2.5V
3.3V
Package
QFN8 (3mm x 3mm)
QFN8 (3mm x 3mm)
QFN8 (3mm x 3mm)
QFN8 (3mm x 3mm)
QFN8 (3mm x 3mm)
SOIC8E
SOIC8E
SOIC8E
SOIC8E
SOIC8E
Top Marking
8K
2V
3V
9Z
2S
M20045DN
20045-15
20045-18
20045-25
20045-33
Free Air Temperature (TA)
-40°C to +85°C
* For fixed output voltage versions between 1.5V and 5V, add suffix –XX (e.g. MP20045DQ-33, MP20045DN-33
are 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
TOP VIEW
TOP VIEW
VIN
1
8
EN
VIN
2
7
PG
VOUT
3
6
GND
VOUT
4
5
VOUT
1
8
VIN
VOUT
2
7
VIN
FB
3
6
EN
GND
4
5
PG
FB
EXPOSED PAD
ON BACKSIDE
CONNECT TO GND
QFN8 (3mm x 3mm)
MP20045 Rev. 1.0
10/13/2010
SOIC8E
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2
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
ABSOLUTE MAXIMUM RATINGS (1)
VIN, EN, PG, FB to GND ................-0.3V to +6V
OUT to GND .........................-0.5V to VIN + 0.5V
(2)
Continuous Power Dissipation (TA=+25°C)
QFN8 (3x3) ......................................................2.0W
SOIC8E ............................................................2.0W
Free Air Temperature (TA).............. -40°C to 85°C
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
Thermal Resistance
(4)
θJA
θJC
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 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.
(3)
Supply Input Voltage.......................2.5V to 5.5V
Enable Input Voltage .........................0V to 5.5V
Operating Junct. Temp (TJ)...... -40°C to +125°C
MP20045 Rev. 1.0
10/13/2010
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3
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
ELECTRICAL CHARACTERISTICS
VIN=VOUT+0.5V or VIN=2.5V, EN=VIN, Typical values are at TA=+25°C, unless otherwise specified
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
Condition
VIN rising
Min
2.5
2.0
Typ
Max
5.5
2.3
160
PSRR
IOUT=1mA
IOUT=1mA, 2.5V<VIN<5.5V
IOUT=1mA, 2.5V<VIN<5.5V
IOUT=1mA, 3V<VIN<5.5V
IOUT=1mA, 3.8V<VIN<5.5V
Continuous, VIN>=3V
VOUT=0, VIN>=3V
VOUT within 4% of normal output
voltage VIN=5.5V
IOUT=100µA
IOUT=1A
VIN from VOUT+0.5V to 5.5V, IOUT=5mA
IOUT from 1mA to 1A
VIN=3.3V, VOUT=2.8V, COUT=2.2µF,
IOUT=100mA, f ranges from 10Hz to
100kHz
At 1kHz, IOUT=250mA
Shutdown Supply Current
VIN=+5.5V
EN PIN Threshold
EN Logic High
EN Logic Low
In-Regulation Current Limit
Ground Current
Dropout Voltage(5)
Line Regulation(6)
Load Regulation(7)
Output Voltage Noise
EN pin PULL-UP resistor
Thermal Shutdown Temperature
Minimum input voltage
Trip threshold voltage
-2.5
-2.5
-2.5
-2.5
-2.5
1
1.4
PG
Hysteresis voltage
Output low voltage
Leakage current
2.2
%
A
A
1.6
3.0
A
280
0.15
-0.3
µA
mV
%/V
%
13
µVRMS
56
dB
110
140
-0.15
5
16
1.5
0.4
550k
Typical thermal hysteresis =20°C
IOUT(PG)=300µA
MP20045
MP20045-15
MP20045-18
VOUT decreasing
MP20045-25
MP20045-33
Measured at VOUT
IOUT(PG)=1mA
V(PG)=5.5V
2.5
2.5
2.5
2.5
2.5
Units
V
V
mV
1.1M
150
1.1
80
1.3
86
77
µA
V
Ω
°C
V
%VOUT
83
6
0.15
0.4
1
%VOUT
V
µA
Notes:
5) Dropout Voltage is defined as the input to output differential when the output voltage drops 100mV below its nominal value.
VOUT ⎡ V
6) Line Regulation=
⎣
⎤
IN(MAX ) ⎦
− VOUT ⎡ V
⎣
⎤
IN(MIN) ⎦
⎡V
− VIN(MIN) ⎤ × VOUT(NOM)
⎣ IN(MAX )
⎦
7) Load Regulation=
VOUT ⎡I
⎤
⎣ OUT (MAX ) ⎦
− VOUT ⎡I
VOUT (NOM)
MP20045 Rev. 1.0
10/13/2010
⎤
⎣ OUT(MIN) ⎦
× 100(% / V)
× 100(%)
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4
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
PIN DESCRIPTION
QFN8 (3X3)
Pin #
SOIC8E
Pin #
Name
1, 2
7, 8
VIN
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.
3, 4
1, 2
VOUT
Regulator output. Bypass with a 2.2µF low-ESR capacitor to GND.
Connect all the pin together externally.
Description
5
3
FB
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.
6
4
GND
Expose
d pad
Ground. Connect exposed pad to GND plane for optimal thermal
performance.
7
5
PG
Open-drain power-good (PG) output.
8
6
EN
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.
MP20045 Rev. 1.0
10/13/2010
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5
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS
VIN=3.3V, VOUT=2.8V, CIN=COUT=2.2µF, TA=25°C, unless otherwise noted
Quiescent Current
vs. Temperature
Quiescent Current
vs. Input Voltage
120
60
40
20
0
-40 -20
0
20
40
60
160
100
DR OPOUT V OL T A G E (mV )
QUI E SC E NT C UR R E NT (uA )
80
80
60
40
20
0
80 100
3
Dropout Voltage
vs. Output Current
3.5
4
4.5
5
5.5
I NPUT V OL T A G E (V )
EN threshold
vs. Input Voltage
EN high threshold
0.8
0.7
60
40
0.6
20
0.5
0
200
400
600
800
EN low threshold
2.5
2
2
C UR R E NT L I M I T (A )
2.5
1
0.5
0
-40 -20
0
20
40
60
3.5
4
4.5
5
I NPUT V OL T A G E (V )
80 100
0
-40 -20
20
40
60
80 100
EN threshold
vs. Temperature
EN high threshold
0.6
0.5
EN low threshold
0.4
1.5
1
0.5
0
3
3.5
4
4.5
5
5.5
0
20
40
60
80 100
Line Regulation
0.3
0.2
IOUT=0.5A
0.1
0.0
IOUT=0A
-0.1
-0.2
-0.3
3.0
3.5
INPUT VOLTAGE (V)
MP20045 Rev. 1.0
10/13/2010
0
0
-40 -20
5.5
Current Limit
vs. Input Voltage
1.5
IOUT=1A
20
0.1
3
Current Limit
vs. Temperature
40
0.2
0.4
1000
60
0.3
OUT PUT V OL T A G E A C C UR A C Y (% )
0
80
0.7
VEN(V)
VEN(V)
80
100
0.8
0.9
100
120
0.9
1
120
140
1
1.1
140
C UR R E NT L I M I T (A )
180
120
100
160
Dropout Voltage
vs. Temperature
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4.0
4.5
5.0
5.5
INPUT VOLTAGE (V)
6
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN=3.3V, VOUT=2.8V, CIN=COUT=2.2µF, TA=25°C, unless otherwise noted
Load Regulation
Output Voltage Accuracy
vs. Temperature
0.06
0.8
PSRR Vs. Frequency
IOUT=800mA,
f ranges from 10Hz to 1MHz
IOUT=250mA,
100
90
0.6
0.04
80
0.4
0.02
70
0.00
PSRR (dB)
0.2
0.0
-0.2
-0.02
-0.4
-0.04
-0.06
0
200
400
600
800
1000
-0.8
-40 -20
0
20
40
60
50
40
30
20
IOUT =1A
-0.6
60
10
80 100
0
10
OUTPUT CURRENT (mA)
10
2
104
103
105
FREQUENCY (Hz)
106
Region of Stable COUT ESR
vs. Output Current
100
10
Unstable Range
1
Stable Range
0.1
0
200
400
600
800
1000
OUTPUT CURRENT (mA)
MP20045 Rev. 1.0
10/13/2010
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MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN=3.3V, VOUT=2.8V, CIN=COUT=2.2µF, TA=25°C, unless otherwise noted
Input Power Start Up
Input Power Shutdown
EN Start Up
IOUT=1A, with Resistor Load
IOUT=1A, with Resistor Load
IOUT=1A, with Resistor Load
VIN
2V/div
VIN
2V/div
VOUT
2V/div
VOUT
2V/div
IOUT
500mA/div
IOUT
500mA/div
2ms/div
VEN
5V/div
VOUT
1V/div
IOUT
500mA/div
40us/div
100ms/div
EN Shutdown
Line Transient
Line Transient
IOUT=1A, with Resistor Load
VIN=3.3V to 4.3V, IOUT=100mA,
with Resistor Load
VIN=3.3V to 4.3V, IOUT=1A,
with Resistor Load
VEN
5V/div
VOUT (AC)
10mV/div
VIN
1V/div
VOUT (AC)
10mV/div
VIN
1V/div
VOUT
1V/div
IOUT
500mA/div
4us/div
400us/div
Load Transient
Over Current Protection
Entry
Power Good Status
IOUT=50mA to 1A,
with Resistor Load
VOUT (AC)
50mV/div
VIN
2V/div
VOUT
2V/div
IOUT
500mA/div
100us/div
MP20045 Rev. 1.0
10/13/2010
400us/div
PG
1V/div
VOUT
500mV/div
IOUT
500mA/div
40us/div
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400ms/div
8
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN=3.3V, VOUT=2.8V, CIN=COUT=2.2µF, TA=25°C, unless otherwise noted
Over Current Protection
Recovery
Over Current Protection
Steady State
No Load
No Load
VIN
2V/div
VOUT
2V/div
VIN
2V/div
VOUT
2V/div
IOUT
500mA/div
IOUT
500mA/div
20ms/div
MP20045 Rev. 1.0
10/13/2010
Current Limit
IOUT
500mA/div
40ms/div
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4ms/div
9
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
BLOCK DIAGRA
Figure 1—Block Diagram of Super Low Dropout Regulation
OPERATION
The MP20045 is a low-dropout linear regulator
supplies up to 1A current. It is intended for use
in devices that require very low voltage, low
quiescent, low noise and high PSRR such as
wireless LAN, battery powered equipment and
hand-held equipment.
The MP20045 uses an internal PMOS as the
pass element and features internal thermal
shutdown and internal current limit circuit.
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 MP20045 is very low.
Shutdown
The MP20045 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 pin.
MP20045 Rev. 1.0
10/13/2010
Current Limit
The MP20045 includes a current limit structures
which monitor and control PMOS’s gate voltage
limiting the guaranteed maximum output current
to 1.2A.
Thermal Protection
Thermal protection turns off the PMOS when
the junction temperature exceeds +150ºC,
allowing the IC to cool. When the IC’s junction
temperature drops by 20ºC, the PMOS will be
turned on again. Thermal protection limits total
power dissipation in the MP20045. For reliable
operation, junction temperature should be
limited to 125 ºC maximum.
Load-Transient Considerations
The output response of load-transient consists
of a DC shift and transient response. Because
of the excellent load regulation of MP20045, the
DC shift is very small. The output voltage
transient depends on the output capacitor’s
value and the ESR. Increasing the capacitance
and decreasing the ESR will improve the
transient response.
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10
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
APPLICATION INFORMATION
Setting the Output Voltage
The output voltage of MP20045 can be set
externally which ranges from 1.5V to 5V by
operating from +2.5V to +5.5V input or preset
internally at 1.5V, 1.8V, 2.5V, 3.3V, 5V. For the
adjustable version, the output voltage is set by
using a resistive voltage divider from the output
voltage to FB pin. The voltage divider divides
the output voltage down to the feedback voltage
by the ratio:
100
R2
R1 + R2
Where VFB is the feedback threshold voltage
(VFB = 1.5V), and VOUT is the output voltage.
Thus the output voltage is:
VOUT = 1.5 ×
R1+ R2
R2
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
⎝
COUT ESR(Ω)
VFB = VOUT
Output Capacitor Selection
The MP20045 is designed specifically to work
with very low ESR ceramic output capacitor in
space-saving and performance consideration. A
2.2µF ceramic capacitor with ESR lower than
0.9Ω is suitable for the MP20045 application
circuit. Output capacitor of larger values will
help to improve load transient response and
reduce noise with the drawback of increased
size.
10
1
0.1
0
100
200
300
400
500
600
700
800
900
1000
OUTPUT CURRENT(mA)
⎞
⎟⎟
⎠
For example, for a 2.8V output voltage, R2 is
10kΩ, and R1 is 8.66kΩ. You can select a
standard 8.66kΩ (±1%) resistor for R1.
Figure 2—Relationship between ESR and
LDO Stability
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:
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. Connecting the GND pin of
MP20045 to ground using a large pad or
ground plane helps to channel heat away.
MP20045 Rev. 1.0
10/13/2010
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11
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
PACKAGE INFORMATION
SOIC8E
0.189(4.80)
0.197(5.00)
8
0.124(3.15)
0.136(3.45)
5
0.150(3.80)
0.157(4.00)
PIN 1 ID
1
0.228(5.80)
0.244(6.20)
0.089(2.26)
0.101(2.56)
4
TOP VIEW
BOTTOM VIEW
SEE DETAIL "A"
0.051(1.30)
0.067(1.70)
SEATING PLANE
0.000(0.00)
0.006(0.15)
0.013(0.33)
0.020(0.51)
0.0075(0.19)
0.0098(0.25)
SIDE VIEW
0.050(1.27)
BSC
FRONT VIEW
0.010(0.25)
x 45o
0.020(0.50)
GAUGE PLANE
0.010(0.25) BSC
0.050(1.27)
0.024(0.61)
0o-8o
0.016(0.41)
0.050(1.27)
0.063(1.60)
DETAIL "A"
0.103(2.62)
0.138(3.51)
RECOMMENDED LAND PATTERN
MP20045 Rev. 1.0
10/13/2010
0.213(5.40)
NOTE:
1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN
BRACKET IS IN MILLIMETERS.
2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH,
PROTRUSIONS OR GATE BURRS.
3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH
OR PROTRUSIONS.
4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING)
SHALL BE 0.004" INCHES MAX.
5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION BA.
6) DRAWING IS NOT TO SCALE.
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12
MP20045 – LOWER NOISE, 1A LINEAR REGULATOR
QFN8 (3mm×3mm)
2.90
3.10
0.30
0.50
PIN 1 ID
MARKING
0.20
0.30
2.90
3.10
PIN 1 ID
INDEX AREA
1.45
1.75
PIN 1 ID
SEE DETAIL A
8
1
2.25
2.55
0.65
BSC
4
5
TOP VIEW
BOTTOM VIEW
PIN 1 ID OPTION A
0.30x45º 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:
2.90
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 VEEC-2.
5) DRAWING IS NOT TO SCALE.
1.70
0.25
2.50
0.65
RECOMMENDED LAND PATTERN
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.
MP20045 Rev. 1.0
10/13/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
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