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MP2307 Datasheet Preview

MP2307 Datasheet

340KHz Synchronous Rectified Step-Down Converter

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The Future of Analog IC Technology
MP2307
3A, 23V, 340KHz Synchronous Rectified
Step-Down Converter
DESCRIPTION
The MP2307 is a monolithic synchronous buck
regulator. The device integrates 100m
MOSFETS that provide 3A of continuous load
current over a wide operating input voltage of
4.75V to 23V. Current mode control provides
fast transient response and cycle-by-cycle
current limit.
An adjustable soft-start prevents inrush current
at turn-on and in shutdown mode, the supply
current drops below 1µA.
This device, available in an 8-pin SOIC
package, provides a very compact system
solution with minimal reliance on external
components.
EVALUATION BOARD REFERENCE
Board Number
EV2307DN-00A
Dimensions
2.0”X x 1.5”Y x 0.5”Z
FEATURES
3A Continuous Output Current
4A Peak Output Current
Wide 4.75V to 23V Operating Input Range
Integrated 100mPower MOSFET Switches
Output Adjustable from 0.925V to 20V
Up to 95% Efficiency
Programmable Soft-Start
Stable with Low ESR Ceramic Output Capacitors
Fixed 340KHz Frequency
Cycle-by-Cycle Over Current Protection
Input Under Voltage Lockout
Thermally Enhanced 8-Pin SOIC Package
APPLICATIONS
Distributed Power Systems
Networking Systems
FPGA, DSP, ASIC Power Supplies
Green Electronics/Appliances
Notebook Computers
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
INPUT
4.75V to 23V
C5
10nF
21
7
IN
EN
BS
SW
3
8 SS
MP2307
FB 5
GND
COMP
46
C3
3.9nF
OUTPUT
3.3V
3A
MP2307_TAC01
Efficiency vs
Load Current
100
95
90 VIN = 12V
VIN = 5V
85
80 VIN = 23V
75
70
65
60
55
50
0.1
1.0
LOAD CURRENT (A)
10
MP2307_EC01
MP2307 Rev. 1.9
5/28/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
1




MPS

MP2307 Datasheet Preview

MP2307 Datasheet

340KHz Synchronous Rectified Step-Down Converter

No Preview Available !

MP2307 – 3A, 23V, 340KHz SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER
PACKAGE REFERENCE
TOP VIEW
BS
IN
SW
GND
1
2
3
4
8 SS
7 EN
6 COMP
5 FB
EXPOSED PAD
ON BACKSIDE
MP2307_PD01_SOIC8N
Part Number* Package
Temperature
MP2307DN
SOIC8N
(Exposed Pad)
–40° to +85°C
* For Tape & Reel, add suffix –Z (eg. MP2307DN–Z)
For Lead Free, add suffix –LF (eg. MP2307DN–LF–Z)
ABSOLUTE MAXIMUM RATINGS (1)
Supply Voltage VIN....................... –0.3V to +26V
Switch Voltage VSW................. –1V to VIN + 0.3V
Boost Voltage VBS..........VSW – 0.3V to VSW + 6V
All Other Pins................................. –0.3V to +6V
Junction Temperature...............................150°C
Lead Temperature ....................................260°C
Storage Temperature .............–65°C to +150°C
Recommended Operating Conditions (2)
Input Voltage VIN............................ 4.75V to 23V
Output Voltage VOUT .................... 0.925V to 20V
Ambient Operating Temp .............. –40°C to +85°C
Thermal Resistance (3) θJA θJC
SOIC8N .................................. 50 ...... 10... °C/W
Maximum Power Dissipation Operating
(TA=25°C)
SOIC8N(4), POUT ....................... .......... ........ 2W
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its operating conditions.
3) Measured on approximately 1” square of 1 oz copper.
4) Derating 20mW/°C at TA > 25°C
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = +25°C, unless otherwise noted.
Parameter
Symbol Condition
Shutdown Supply Current
Supply Current
Feedback Voltage
Feedback Overvoltage Threshold
Error Amplifier Voltage Gain (5)
Error Amplifier Transconductance
High-Side Switch On-Resistance (5)
Low-Side Switch On-Resistance (5)
High-Side Switch Leakage Current
Upper Switch Current Limit
VEN = 0V
VEN = 2.0V, VFB = 1.0V
VFB 4.75V VIN 23V
AEA
GEA
RDS(ON)1
RDS(ON)2
IC = ±10µA
VEN = 0V, VSW = 0V
Minimum Duty Cycle
Lower Switch Current Limit
From Drain to Source
COMP to Current Sense
Transconductance
GCS
Oscillation Frequency
Short Circuit Oscillation Frequency
Maximum Duty Cycle
Minimum On Time (5)
EN Shutdown Threshold Voltage
EN Shutdown Threshold Voltage
Hysterisis
Fosc1
Fosc2
DMAX
TON
VFB = 0V
VFB = 1.0V
VEN Rising
Min
0.900
4.0
300
1.1
Typ
0.3
1.3
0.925
1.1
400
820
100
100
0
5.8
0.9
5.2
340
110
90
220
1.5
220
Max
3.0
1.5
0.950
10
380
2.0
Units
µA
mA
V
V
V/V
µA/V
m
m
µA
A
A
A/V
KHz
KHz
%
ns
V
mV
MP2307 Rev. 1.9
5/28/2008
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2008 MPS. All Rights Reserved.
2


Part Number MP2307
Description 340KHz Synchronous Rectified Step-Down Converter
Maker MPS
Total Page 12 Pages
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