MP2305
2A, 23V Synchronous Rectified
Step-Down Converter
The Future of Analog IC Technology
DESCRIPTION FEATURES
The MP2305 is a monolithic synchronous buck
2A Output Current
regulator. The device integrates 130m
Wide 4.75V to 23V Operating Input Range
MOSFETS that provide 2A continuous load
Integrated 130m Power MOSFET Switches
current over a wide operating input voltage of
Output Adjustable from 0.923V to 20V
4.75V to 23V. Current mode control provides
Up to 93% Efficiency
fast transient response and cycle-by-cycle
Programmable Soft-Start
current limit.
Stable with Low ESR Ceramic Output Capacitors
An adjustable soft-start prevents inrush current Fixed 340kHz Frequency
at turn-on. Shutdown mode drops the supply
Cycle-by-Cycle Over Current Protection
current to 1A.
Input Under Voltage Lockout
This device, available in an 8-pin SOIC
APPLICATIONS
package, provides a very compact system
Distributed Power Systems
solution with minimal reliance on external
Networking Systems
components.
FPGA, DSP, ASIC Power Supplies
EVALUATION BOARD REFERENCE
Green Electronics/ Appliances
Board Number Dimensions Notebook Computers
EV2305DS-00A 2.0X x 1.5Y x 0.5Z
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green
status, please visit MPS website under Products, Quality Assurance page.
MPS and The Future of Analog IC Technology are registered trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
C5
Efficiency vs
10nF
Load Current
100
95 V = 3.3V
OUT
90
2 1
IN BS 85
7 3 V = 2.5V
OUT
EN SW
80
MP2305
75
5
8
SS FB
70
GND COMP
4 6 65
60
55
50
0 0.5 1.0 1.5 2.0 2.5
LOAD CURRENT (A)
MP2305-EC01
MP2305 Rev. 1.83 www.MonolithicPower.com 1
12/24/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
2013 MPS. All Rights Reserved.
EFFICIENCY (%)MP2305 2A, 23V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
ORDERING INFORMATION
Part Number* Package Top Marking Free Air Temperature (T )
A
SOIC8
MP2305DS MP2305DS -40 C to +85 C
* For Tape & Reel, add suffix Z (e.g. MP2305DSZ);
For RoHS compliant packaging, add suffix LF (e.g. MP2305DSLFZ)
PACKAGE REFERENCE
TOP VIEW
BS 1 8 SS
IN 2 7 EN
SW 3 6 COMP
GND 4 5 FB
MP2305_PD01
(1) (4)
ABSOLUTE MAXIMUM RATINGS Thermal Resistance
JA JC
Supply Voltage V .......................0.3V to +26V SOIC8..................................... 90...... 45... C/W
IN
Switch Voltage V .............................................
SW
Notes:
1V (-5V for <10ns) to 26.3V (28V for <10ns)
1) Exceeding these ratings may damage the device.
Boost Voltage V ..........V 0.3V to V + 6V
BS SW SW
2) The maximum allowable power dissipation is a function of the
maximum junction temperature T (MAX), the junction-to-
All Other Pins.................................0.3V to +6V J
(2) ambient thermal resistance , and the ambient temperature
JA
Continuous Power Dissipation (T = +25C)
A
T . The maximum allowable continuous power dissipation at
A
.1.39W
any ambient temperature is calculated by P (MAX)=(T (MAX)-
D J
T )/ . Exceeding the maximum allowable power dissipation
A JA
Junction Temperature...............................150C
will cause excessive die temperature, and the regulator will go
Lead Temperature ....................................260C
into thermal shutdown. Internal thermal shutdown circuitry
Storage Temperature ............. 65C to +150C protects the device from permanent damage.
3) The device is not guaranteed to function outside of its
(3)
operating conditions.
Recommended Operating Conditions
4) Measured on JESD51-7 4-layer PCB.
Input Voltage V ............................4.75V to 23V
IN
Output Voltage V .....................0.923V to 20V
OUT
Operating Junction Temp. (T ). -40C to +125C
J
MP2305 Rev. 1.83 www.MonolithicPower.com 2
12/24/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
2013 MPS. All Rights Reserved.