MPS MP20046 Fast transient response, 2a low dropout voltage regulator Datasheet

MP20046
Fast Transient Response, 2A
Low Dropout Voltage Regulator
The Future of Analog IC Technology
DESCRIPTION
FEATURES
The MP20046 is a low dropout linear regulator
supplying up to 2A current with 210mV dropout
voltage. The output voltage is preset internally
which ranges from 1.5V to 3.3V.
•
•
•
•
•
•
•
•
An internal PMOS pass element is used to
allow a low 75µA ground current at full load and
drops down to 1uA when the device is disabled,
making the MP20046 suitable for battery-power
devices. Integrated power good (PG) function
resets microcomputer and microprocessor
systems in the event of an under voltage
condition. MP20046 are designed to have fast
response for larger load and line transient
response. Other features include current limit
and thermal protection.
Up to 2A Output Current
Low 210mV Dropout at 2A
Fast Transient Response
Open Drain Power-Good(PG) Status Output
High 70dB at100Hz PSRR
Low 17µVRMS Output Noise
Current Limit and Thermal Protection
Available in SOIC8 with Exposed Pad and
10-pin QFN Packages
APPLICATIONS
•
•
•
Telecom
Servers
DSP, FPGA Supplies
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
The MP20046 is available in thermally
enhanced SOIC8 package and 10-pin QFN
package.
TYPICAL APPLICATION
IN
VIN
PG
MP20046
CIN
47uF
ON OFF
EN
OUT
SENSE
MP20046 Rev. 1.1
10/13/2010
PG
R1
100k
C1
1nF
VOUT
COUT
47uF
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
1
MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR
ORDERING INFORMATION
Part Number*
Output Voltage
Package
Top Marking Junction Air Temperature (TJ)
MP20046DN-F**
1.5V
SOIC8E
MP20046DQ-G
1.8V
QFN10 (3x3)
MP20046DN-J**
2.5V
SOIC8E
MP20046DQ-S**
3.3V
QFN10 (3x3)
MP20046DN-S**
3.3V
SOIC8E
M20046F
3J
M20046J
9N
M20046S
-40oC to +85oC
*Other output voltage versions between 1.5V and 3.3V, contact factory for availability.
ORDERING GUIDE**
MP20046D - -LF-Z
Output Voltage
See Output Voltage Selector Guide Table
Package Type
Q: QFN10 (3mm x 3mm)
N: SOIC8E
Operating Temperature Range
D:Extended Temperature Range (-40OC to +85OC)
** For RoHS Compliant Packaging, add suffix - LF (e.g. MP20046D
For Tape and Reel, add suffix -Z (e.g. MP20046D
-
-
-LF);
-LF-Z).
OUTPUT VOLTAGE SELECTOR GUIDE
Code
F
W
G
D
Y
H
E
J
K
T
MP20046 Rev. 1.1
10/13/2010
VOUT
1.5
1.6
1.8
1.85
1.9
2.0
2.1
2.5
2.6
2.65
Code
L
M
N
V
P
Q
X
R
S
VOUT
2.7
2.8
2.85
2.9
3.0
3.1
3.15
3.2
3.3
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
2
MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR
PACKAGE REFERENCE
TOP VIEW
SOIC8E
VOUT
1
10
VIN
VOUT
2
9
VIN
VOUT
3
8
VIN
SENSE
4
7
PG
GND
5
6
EN
QFN10(3x3)
ABSOLUTE MAXIMUM RATINGS (1)
Thermal Resistance
(4)
θJA
θJC
Supply Input Voltage................................... 6.5V
Continuous Power Dissipation (TA = +25°C)
SOIC8E .................................. 50 .......10... °C/W
QFN10 (3x3)........................... 60 .......12... °C/W
SOIC8E........ ........................................... 2.0W
QFN10 (3x3) . ………………………………1.67W
Junction Operation Temperature Range
............................................... -40°C to 150°C
Storage Temperature Range ..... -65°C to 150°C
Lead Temperature (Soldering, 10sec) .....260°C
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.
(2)
Recommended Operating Conditions
(3)
Supply Input Voltage.......................2.7V to 5.5V
Enable Input Voltage .........................0V to 5.5V
Operating Junct. Temp (TJ)...... -40°C to +125°C
MP20046 Rev. 1.1
10/13/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
3
MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS
VIN=(VOUT (TYP) +1V) or +2.7V, IOUT=1mA, VEN=0V, COUT=47µF, TJ =-40°C to +125°C, unless otherwise
noted. Typical values are at TA =+25°C.
Parameter
Symbol
1.5V
1.8V
2.5V
3.3V
Output Voltage
VOUT
IGND
Ground Pin Current
Line Regulation
∆VOUT%/
VOUT
(5)
Load Regulation(6)
∆VOUT
Output Voltage Noise
Dropout Voltage
(7)
VDO
Current Limit
Standby Current
EN Input High Threshold
EN Input Low Threshold
ILIM
ISTBY
VIH
VIL
Thermal Shutdown Temperature
TSD
Output Voltage AC PSRR
PG
PSRR
Minimum Input Voltage
for Valid PG
Trip Threshold Voltage
Hysteresis Voltage
Output Low Voltage
Leakage Current
EN Input Current
Condition
2.7V < VIN < 5.5V
2.8V < VIN < 5.5V
3.5V < VIN < 5.5V
4.3V < VIN < 5.5V
IOUT = 1mA to 2A
Min
1.485
1.782
2.475
3.267
VOUT + 1V < VIN ≤ 5.5V
Typ
1.5
1.8
2.5
3.3
75
Max
1.515
1.818
2.525
3.333
300
Units
0.01
0.1
%/V
IOUT = 1mA to 2A
10Hz to 30kHz,
VOUT=3.3V, COUT=100µF
IOUT=2A,,VOUT= 1.4V
IOUT=2A, VOUT= 1.7V
IOUT=2A, VOUT= 2.4V
IOUT=2A,,VOUT= 3.2V
VOUT=0V
EN =VIN
µA
4
mV
17
µVRMS
300
300
280
210
3.3
1
470
470
420
400
4.5
10
1.5
0.4
F=100Hz, COUT=100µF,
IOUT=2A
IOUT(PG)=300µA, V(PG) ≤ 0.8
V
VOUT decreasing
Measured at VOUT
IOUT(PG)=1mA
V(PG) = 5.5V
EN =VIN
EN =0V
V
mV
A
µA
V
V
+150
°C
70
dB
78
1.15
0.15
-1
-1
0
1.6
V
86
%VOUT
%VOUT
V
µA
µA
µA
0.4
1
1
1
Notes:
5) Line Regulation=
VOUT ⎡ V
⎣
⎤
IN(MAX ) ⎦
− VOUT ⎡ V
⎣
⎤
IN(MIN) ⎦
⎡V
− VIN(MIN) ⎤ × VOUT(NOM)
⎣ IN(MAX )
⎦
6) Load Regulation= V
OUT ⎡I
⎤
⎣ OUT(MAX ) ⎦
× 100(% / V)
− VOUT ⎡I
⎤
⎣ OUT(MIN) ⎦
7) Ramp down input voltage till output voltage equals VOUT(NOM) – 0.1V
MP20046 Rev. 1.1
10/13/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
4
MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR
PIN FUNCTIONS
SOIC8E
Pin #
QFN10
(3mm×3mm)
Pin #
Name
Description
1, 2
1, 2, 3
VOUT
Regulated output voltage
3
4
SENSE
Output sense
4
5
5
6
EN
Negative polarity enable ( EN ) input
6
7
PG
Open-drain power-good (PG) output
7, 8
8, 9, 10
VIN
Input voltage
MP20046 Rev. 1.1
10/13/2010
GND/
Ground. Connect exposed pad to GND plane for optimal thermal
Exposed Pad performance
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
5
MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS
VIN=3.8V, VOUT =3.3V, CIN=COUT =47µF, TA=25oC, unless otherwise noted.
Quiescent Current vs.
Input Voltage
70
60
50
40
30
20
10
0
-40 -20 0 20 40 60 80 100120140
T E MP E R AT UR E (oC)
100
80
60
40
20
0
3.5
200
50
VEN (V)
EN low threshold
0
-40 -20 0 20 40 60 80 100120140
T E MP E R AT UR E (oC)
MP20046 Rev. 1.1
10/13/2010
0.5
EN low threshold
0.4
0.3
0.2
0.1
4
4.5
5
INP UT V OL T AG E (V )
0
-40 -20 0 20 40 60 80 100120140
T E MP E R AT UR E (oC)
5.5
Line Regulation
3
2
1
0
3.5
4
4.5
5
INP UT V OL T AG E (V )
5.5
OUT P UT V OL T AG E AC C UR AC Y (% )
4
C UR R E NT L IMIT (A)
C UR R E NT L IMIT (A)
0.6
Current Limit vs.
Input Voltage
4
EN high threshold
0.7
EN high threshold
0.7
5
0 20 40 60 80 100120140
T E MP E R AT UR E (oC)
EN threshold vs.
Temperature
0.8
5
IOUT=2A
0
-40 -20
0.8
Current Limit vs.
Temperature
1
50
1
0.4
3.5
0.5
1
1.5
2
OUT P UT C UR R E NT (A)
2
100
5.5
0.5
3
150
0.9
0.6
0
200
1.1
0.9
VEN (V)
DR OP OUT V OL T AG E (mV )
250
100
4
4.5
5
INP UT V OL TAGE(V )
250
EN threshold vs.
Input Voltage
Dropout Voltage vs.
Output Current
150
300
DR OP OUT V OL T AG E (mV )
80
0
Dropout Voltage vs.
Temperature
120
90
QU IE S C E NT C U R R E NT(uA )
QUIE S C E NT C UR R E NT (uA)
Quiescent Current vs.
Temperature
0.03%
0.02%
0.01%
IOUT=1A
0.00%
IOUT=0A
-0.01%
-0.02%
-0.03%
3.5
4.0
4.5
5.0
INP UT V OL T AG E (V )
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
5.5
6
MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN=3.8V, VOUT=3.3V, CIN=COUT =47µF, TA=25oC, unless otherwise noted.
Output Voltage Accuracy
vs. Temperature
0.10%
0.08%
0.06%
0.04%
0.02%
0.00%
-0.02%
0
0.5
1
1.5
2
PSRR
IOUT=2A
f ranges from 10Hz to 1MHz
0.30%
100
90
0.20%
80
70
0.10%
PSRR(dB)
OUTPUT VOLTAGE ACCURACY(%)
OUTPUT VOLTAGE ACCURACY(%)
Load Regulation
0.00%
-0.10%
60
50
40
30
20
-0.20%
10
-0.30%
-40 -20
0
20
40
60
80
0
10
102
T E MP E R AT UR E (oC)
OUT P UT C UR R E NT (A)
103
104
105
106
FREQUENCY (Hz)
Region of Stable COUT ESR
vs. Output Current
100
10
Unstable Range
1
Stable Range
0.1
0
0.5
1
1.5
OUTPUT CURRENT (A)
MP20046 Rev. 1.1
10/13/2010
2
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
7
MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN=3.8V, VOUT=3.3V, CIN=COUT =47µF, TA=25oC, unless otherwise noted.
VEN
5V/div.
VIN
1V/div.
VIN
1V/div.
VOUT
1V/div.
PG
1V/div.
IOUT
2A/div.
VOUT
1V/div.
PG
1V/div.
IOUT
2A/div.
VOUT
1V/div.
PG
1V/div.
IOUT
2A/div.
VIN
1V/div.
VOUT (AC)
10mV/div.
VOUT (AC)
10mV/div
VIN
1V/div
IOUT
100mA/div.
IOUT
1A/div
VEN
5V/div.
VOUT
1V/div.
PG
1V/div.
IOUT
2A/div.
VOUT (AC)
50mV/div
IOUT
1A/div
MP20046 Rev. 1.1
10/13/2010
VOUT (AC)
100mV/div
IOUT
1A/div
VIN
2V/div
VOUT
2V/div
IOUT
2A/div
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
8
MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN=3.8V, VOUT=3.3V, CIN=COUT =47µF, TA=25oC, unless otherwise noted.
Short Protection Steady State
VIN=3.8V, VOUT=3.3V
Short Out to GND
VIN
2V/div
VOUT
2V/div
VIN
2V/div
IOUT
2A/div
IOUT
2A/div
VIN=3.8V, VOUT=3.3V
Short Out to GND
VOUT
2V/div
2ms/div
MP20046 Rev. 1.1
10/13/2010
Short Protection Recovery
20ms/div
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
9
MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR
FUNCTION BLOCK DIAGRAM
Figure 1—Block Diagram of Low Dropout Regulation
MP20046 Rev. 1.1
10/13/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
10
MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR
OPERATION
The MP20046 is a low dropout linear regulator
supplying up to 2A current. It is intended for use
in devices that require very low dropout voltage,
low quiescent, low noise and high PSRR such
as wireless LAN, battery powered equipment
and hand-held equipment.
The MP20046 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 MP20046 is very low.
Shutdown
The MP20046 can be switched ON or OFF by a
logic input at the EN pin. A high voltage at this
pin will turn the device off. When the EN pin is
low, the regulator output is on. The EN pin
should be tied to GND 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 MP20046 includes a current limit structure
which monitors and controls PMOS’s gate
voltage to limit the guaranteed maximum output
current to 3.3A.
MP20046 Rev. 1.1
10/13/2010
Power Good
The power good pin is an open collector output
connected to OUT with a pull up resistor. It
monitors the output voltage, and if the output
voltage deceases below 83% of its regulation
point, the PG pin becomes low. Enlarging pull
up resistor or bypass capacitor will extend the
set up time of PG output.
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 MP20046. 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 MP20046, the
DC shift is very small. For external circuit, 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.
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
11
MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR
APPLICATION INFORMATION
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
MP20046 to ground using a large pad or
ground plane helps to channel heat away.
Output Noise
Output noise voltage is the RMS output noise
voltage over a given range of frequencies
(10Hz to 30kHz) under the conditions of a
constant output current and a ripple-free input
voltage. Most of noise is caused by the internal
voltage reference. A precision bandgap
reference of MP20046 is used to generate the
internal reference voltage. And a low pass filter
is also used to reduce the output noise. These
make the output noise of MP20046 low to
17uVRMS over the range of the full load.
Power Supply Rejection Ratio (PSRR)
Power supply rejection ratio (PSRR), also
known as ripple rejection, measures the LDO
MP20046 Rev. 1.1
10/13/2010
regulator’s ability to prevent the regulated
output voltage fluctuating caused by input
voltage variations.
The ripple rejection is defined by
PSRR =
VIN , ripple
at all frequencies
VOUT , ripple
The control loop tends to be the dominant
contributor of supply rejection. The output
capacitor of large value and low ESR, and
adding by-pass capacitors will improve the
PSRR performance.
Input Capacitor Selection
For a typical application, an input bypass
capacitor is recommended for device stability.
This capacitor should be as close to the input
pins as possible. For fast transient conditions
where droop at the input of the LDO may occur
because of high inrush current, it is
recommended to place a larger capacitor at the
input as well. The size of this capacitor depends
on the output current and response time of the
main power supply, as well as the distance to
the load (LDO).
Output Capacitor Selection
The MP20046 is designed specifically to work
with very low ESR ceramic output capacitor in
space-saving and performance consideration. A
47µF ceramic capacitor with ESR lower than
1.5Ω is suitable for the MP20046 application
circuit. Output capacitor of larger values will
help to improve load transient response and
reduce noise with the drawback of increased
size.
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
12
MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR
PACKAGE INFORMATION
3mm×3mm QFN10
2.90
3.10
0.30
0.50
PIN 1 ID
MARKING
0.18
0.30
2.90
3.10
PIN 1 ID
INDEX AREA
1.45
1.75
PIN 1 ID
SEE DETAIL A
10
1
2.25
2.55
0.50
BSC
5
6
TOP VIEW
BOTTOM VIEW
PIN 1 ID OPTION A
R0.20 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 VEED-5.
5) DRAWING IS NOT TO SCALE.
1.70
0.25
2.50
0.50
RECOMMENDED LAND PATTERN
MP20046 Rev. 1.1
10/13/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
13
MP20046 – FAST TRANSIENT RESPONSE, 2A, LOW DROPOUT VOLTAGE REGULATOR
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"
0.013(0.33)
0.020(0.51)
0.051(1.30)
0.067(1.70)
SEATING PLANE
0.000(0.00)
0.006(0.15)
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)
0.213(5.40)
NOTE:
0.138(3.51)
RECOMMENDED LAND PATTERN
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.
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.
MP20046 Rev. 1.1
10/13/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
14
Similar pages