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Datasheet> All Categories > Power/power management> The power supply circuit> MP2452DD
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MP2452DD

Description
Switching Regulator, Current-mode, 1200kHz Switching Freq-Max, PDSO8, 2 X 3 MM, MO-229VCED-2, QFN-8
CategoryPower/power management    The power supply circuit   
File Size473KB，16 Pages
ManufacturerMonolithic Power Systems
Websitehttps://www.monolithicpower.com
Download Datasheet Parametric Compare View All

MP2452DD Overview

Switching Regulator, Current-mode, 1200kHz Switching Freq-Max, PDSO8, 2 X 3 MM, MO-229VCED-2, QFN-8

MP2452DD Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerMonolithic Power Systems
Parts packaging codeSON
package instructionHTSON,
Contacts8
Reach Compliance Codecompliant
ECCN codeEAR99
Other featuresOPERATES IN ADJUSTABLE MODE FROM 0.794 TO 33V
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Control TechnologyPULSE WIDTH MODULATION
Maximum input voltage36 V
Minimum input voltage3.3 V
Nominal input voltage12 V
JESD-30 codeR-PDSO-N8
length3 mm
Number of functions1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeHTSON
Package shapeRECTANGULAR
Package formSMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Certification statusNot Qualified
Maximum seat height1.05 mm
surface mountYES
Switch configurationBUCK
Maximum switching frequency1200 kHz
Temperature levelINDUSTRIAL
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width2 mm

MP2452DD Preview

MP2452
1A, 36V, 1MHz
Step-Down Converter
The Future of Analog IC Technology
DESCRIPTION
The MP2452 is a high frequency (1MHz) step-
down switching regulator with integrated
internal high-side high voltage power MOSFET.
It provides up to 1A highly efficient output
current with current mode control for fast loop
response.
The wide 3.3V to 36V input range accommodates
a variety of step-down applications in automotive
input environment. A 3µA shutdown mode
quiescent current allows use in battery-powered
applications.
High power conversion efficiency over a wide
load range is achieved by scaling down the
switching frequency at light load condition to
reduce the switching and gate driving losses.
Frequency fold-back helps prevent inductor current
runaway during start-up. Thermal shutdown
provides reliable, fault-tolerant operation.
The MP2452 is available in the 2mm x 3mm QFN8
package.
FEATURES
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
1A Continuous Load Current
130 µA Operating Quiescent Current
Wide 3.3V to 36V Operating Input Range
500 mΩ Internal Power MOSFET
1MHz fixed Switching Frequency
Internally compensated
Stable with Ceramic Output Capacitors
Internal Soft-Start
> 90% Efficiency
+0.794V FB Reference Voltage
Output Adjustable from +0.794V to 33V
3µA Low Shutdown Supply Current
2mm x 3mm QFN8 Package
High Voltage Power Conversion
Automotive Systems
Industrial Power Systems
Distributed Power Systems
Battery Powered Systems
APPLICATIONS
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc..
TYPICAL APPLICATION
Efficiency
100
C4
100nF
D1
V
IN
o
C1
7
FB
EN
5
V
OUT
=5V
V
IN
=8V
V
IN
=12V
2
1
6
BST
NC
GND
SW
3
8
4
L1
6.8uH
V
OUT
5V/1A
o
95
90
EFFICIENCY (%)
85
80
75
70
65
60
55
50
10
100
1000
OUTPUT CURRENT(mA)
V
IN
=24V
V
IN
=36V
MP2452
NC
VIN
C3
10pF
Control
o
MP2452 Rev. 1.0
9/27/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
1
MP2452―1A, 36V, 1MHz, STEP-DOWN CONVERTER
ORDERING INFORMATION
Part Number*
MP2452DD
Package
QFN8(2mm x 3mm)
Top Marking
5F
Temperature
–40°C to +85°C
* For Tape & Reel, add suffix –Z (e.g. MP2452DD–Z).
For RoHS compliant packaging, add suffix –LF (e.g. MP2452DD–LF–Z)
PACKAGE REFERENCE
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage (V
IN
).......................–0.3V to 40V
Switch Voltage (V
SW
).............. –0.3V to V
IN
+0.3V
BST to SW ....................................... -0.3 to 5.0V
All Other Pins ................................–0.3V to 5.0V
(2)
Continuous Power Dissipation (T
A
= +25°C)
……………………………………………….2.3W
Junction Temperature ...............................150°C
Lead Temperature ....................................260°C
Storage Temperature................. -65°C to 150°C
Recommended Operating Conditions
(3)
Supply Voltage V
IN
...........................3.3V to 36V
Output Voltage V
OUT
...................+0.794V to 33V
Operating Temperature............. –40°C to +85°C
Thermal Resistance
(4)
QFN8(2mmx3mm) ..................55 ...... 12 ...
°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 PCB.
θ
JA
θ
JC
MP2452 Rev. 1.0
9/27/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
2
MP2452―1A, 36V, 1MHz, STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS
V
IN
= 12V, V
EN
= 2V, T
A
= 25°C, unless otherwise noted.
Condition
4.0V < V
IN
< 36V
Feedback Voltage
3.3V < V
IN
< 4.0V
Upper Switch On Resistance V
BST
-V
SW
=5V
Upper Switch Leakage
V
EN
= 0V, V
SW
= 0V
Current Limit
VIN UVLO Up Threshold
VIN UVLO Hysteresis
Soft-start time
FB from 0 to 0.794V
Oscillator Frequency
Minimum Switch On Time
Shutdown Supply Current
V
EN
= 0V
Average Quiescent Supply No load, Not switching, V
FB
=0.9
Current
No load, Switching
Thermal Shutdown
Enable Up Threshold
Enable Threshold Hysteresis
1.2
Parameter
Min
0.778
0.770
Typ
0.794
0.794
500
0.1
1.5
3.0
0.4
0.5
1000
100
3
130
220
150
1.5
0.3
1.8
Max
0.810
0.818
1
3.2
Units
V
V
mΩ
µA
A
V
V
ms
kHz
ns
µA
µA
µA
°C
V
V
1.2
2.7
800
1200
15
MP2452 Rev. 1.0
9/27/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
3
MP2452―1A, 36V, 1MHz, STEP-DOWN CONVERTER
PIN FUNCTIONS
Pin #
2
6
Name
BST
GND,
EXPOSED
PAD
FB
EN
VIN
SW
N/C
Description
Bootstrap. This is the positive power supply for the internal floating high side MOSFET
driver. Connect a bypass capacitor between this pin and SW pin.
Ground. Connected GND as close as possible to the output capacitor avoiding the
high current switch paths. Connect exposed pad to GND plane
Feedback. This is the input to the error amplifier. An external resistive divider
connected between the output and GND is compared to the internal +0.794V reference
to set the regulation voltage.
Enable input. Pulling this pin below the specified threshold shuts the chip down. Pulling
it above the specified threshold enables the chip. Floating this pin shuts the chip down.
Input Supply. This supplies power to all the internal control circuitry, both BS regulators
and the high side switch. Connect a decoupling capacitor to ground close to this pin as
possible to reduce switching spikes.
Switch node. This is the output from the high-side switch. Connect a low V
F
Schottky
diode to ground close to this pin as possible to reduce switching spikes.
No connect.
7
5
4
3
1, 8
MP2452 Rev. 1.0
9/27/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
4
MP2452―1A, 36V, 1MHz, STEP-DOWN CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
= 12V, C1 = 4.7µF, C2 = 10µF, L = 6.8µH and T
A
= +25°C, unless otherwise noted.
Efficiency
V
OUT
=2.5V
90
85
80
EFFICIENCY (%)
V
IN
=6V
Efficiency
90
85
80
EFFICIENCY (%)
Current Limit vs. Duty Cycle
2
1.9
V
IN
=12V
V
OUT
=3.3V
V
IN
=8V
1.8
70
65
60
55
50
45
40
10
V
IN
=12V
V
IN
=24V
70
65
60
55
50
45
40
V
IN
=24V
V
IN
=36V
I
PEAK_LIMIT
(A)
75
75
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1
100
OUTPUT CURRENT(mA)
1000
10
100
OUTPUT CURRENT(mA)
1000
0
20
40
60
80
100
DUTY CYCLE (%)
Steady State
V
IN
=12V,V
OUT
=5V,I
OUT
=0.1A
V
OUT
V
OUT
(AC coupled)
10mV/div.
Steady State
V
IN
=12V,V
OUT
=5V,I
OUT
=0.6A
V
OUT
(AC coupled)
10mV/div.
Steady State
V
IN
=12V,V
OUT
=5V,I
OUT
=1A
(AC coupled)
10mV/div.
V
SW
10V/div.
I
L
500mA/div
10V/div.
I
L
500mA/div.
1us/div
1us/div
SW
V
SW
10V/div.
I
L
1A/div
1us/div
.
Startup Through EN
V
IN
=12V,V
OUT
=5V,I
OUT
=0.1A
Startup Through EN
V
IN
=12V,V
OUT
=5V,I
OUT
=0.6A
Startup Through EN
V
IN
=12V,V
OUT
=5V,I
OUT
=1A
V
OUT
5
V/div.
V
EN
2V/div.
V
SW
10V/div.
I
L
500mA/div.
400us/div
V
OUT
5
V/div.
V
EN
2V/div.
V
SW
10V/div.
I
L
500mA/div.
400us/div
V
OUT
5
V/div.
V
EN
2V/div.
V
SW
10V/div.
I
L
1A/div.
400us/div
MP2452 Rev. 1.0
9/27/2010
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2010 MPS. All Rights Reserved.
5
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MP2452DD Related Products

MP2452DD MP2452DD-LF MP2452DD-Z
Description Switching Regulator, Current-mode, 1200kHz Switching Freq-Max, PDSO8, 2 X 3 MM, MO-229VCED-2, QFN-8 Switching Regulator, Current-mode, 1200kHz Switching Freq-Max, PDSO8, 2 X 3 MM, ROHS COMPLIANT, MO-229VCED-2, QFN-8 Switching Regulator, Current-mode, 1200kHz Switching Freq-Max, PDSO8, 2 X 3 MM, MO-229VCED-2, QFN-8
Is it lead-free? Contains lead Lead free Contains lead
Is it Rohs certified? incompatible conform to incompatible
Maker Monolithic Power Systems Monolithic Power Systems Monolithic Power Systems
Parts packaging code SON SON SON
package instruction HTSON, HTSON, HTSON,
Contacts 8 8 8
Reach Compliance Code compliant compliant compliant
ECCN code EAR99 EAR99 EAR99
Other features OPERATES IN ADJUSTABLE MODE FROM 0.794 TO 33V OPERATES IN ADJUSTABLE MODE FROM 0.794 TO 33V OPERATES IN ADJUSTABLE MODE FROM 0.794 TO 33V
Analog Integrated Circuits - Other Types SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR
control mode CURRENT-MODE CURRENT-MODE CURRENT-MODE
Control Technology PULSE WIDTH MODULATION PULSE WIDTH MODULATION PULSE WIDTH MODULATION
Maximum input voltage 36 V 36 V 36 V
Minimum input voltage 3.3 V 3.3 V 3.3 V
Nominal input voltage 12 V 12 V 12 V
JESD-30 code R-PDSO-N8 R-PDSO-N8 R-PDSO-N8
length 3 mm 3 mm 3 mm
Number of functions 1 1 1
Number of terminals 8 8 8
Maximum operating temperature 85 °C 85 °C 85 °C
Minimum operating temperature -40 °C -40 °C -40 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code HTSON HTSON HTSON
Package shape RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE
Peak Reflow Temperature (Celsius) NOT SPECIFIED 260 NOT SPECIFIED
Certification status Not Qualified Not Qualified Not Qualified
Maximum seat height 1.05 mm 1.05 mm 1.05 mm
surface mount YES YES YES
Switch configuration BUCK BUCK BUCK
Maximum switching frequency 1200 kHz 1200 kHz 1200 kHz
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL
Terminal form NO LEAD NO LEAD NO LEAD
Terminal pitch 0.5 mm 0.5 mm 0.5 mm
Terminal location DUAL DUAL DUAL
Maximum time at peak reflow temperature NOT SPECIFIED 40 NOT SPECIFIED
width 2 mm 2 mm 2 mm

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