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MP1472GJ-P

P1-P3P4-P6P7-P9P10-P12P13-P13
MP1472
2A, 18V Synchronous Rectified
Step-Down Converter
MP1472 Rev. 1.0 www.MonolithicPower.com 1
9/2/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP1472 is a monolithic synchronous buck
regulator. The device integrates a 175m high-
side MOSFET and a 115m low-side MOSFET
that provide 2A of continuous load current over
a wide input voltage of 4.75V to 18V. 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 to 1µA.
This device, available in an 8-pin TSOT23-8
package, provides a very compact solution with
minimal external components.
EVALUATION BOARD REFERENCE
Board Number Dimensions
EV1472GJ-00A 2.5”X x 2.5”Y x 0.5”Z
FEATURES
2A Output Current
Wide 4.75V to 18V Operating Input Range
Integrated Power MOSFET Switches
Output Adjustable from 0.923V to 15V
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
8–Pin TSOT23-8
APPLICATIONS
Distributed Power Systems
Networking Systems
FPGA, DSP, ASIC Power Supplies
Green Electronics/ Appliances
Notebook Computers
For MPS green status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks o
f
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
LOAD CURRENT (A)
EFFICIENCY (%)
Efficiency vs. Load Current
V
OUT
=3.3V
0
10
20
30
40
50
60
70
80
90
100
0.01 0.1 1 10
V
IN
=4.75V
V
IN
=12V
V
IN
=18V
MP1472 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
MP1472 Rev. 1.0 www.MonolithicPower.com 2
9/2/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number Package Top Marking
MP1472GJ*
TSOT23-8
ACW
*For Tape & Reel, add suffix –Z (e.g. MP1472GJ–Z);
PACKAGE REFERENCE
SS
EN
COMP
FB
BST
IN
SW
GND
1
2
3
4
8
7
6
5
TOP VIEW
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage V
IN
........................ -0.3V to +20V
Switch Node Voltage V
SW
............................ 21V
Boost Voltage V
BS
.......... V
SW
– 0.3V to V
SW
+ 6V
All Other Pins .................................. -0.3V to +6V
Junction Temperature ............................... 150°C
Continuous Power Dissipation (T
A
= +25°C)
(2)
……………………………………………….1.25W
Lead Temperature .................................... 260°C
Storage Temperature .............. -65°C to +150°C
Recommended Operating Conditions
(3)
Input Voltage V
IN
............................ 4.75V to 18V
Output Voltage V
OUT
..................... 0.923V to 15V
Maximum Junction Temp. (T
J
) ............... +125C
Thermal Resistance
(4)
θ
JA
θ
JC
TSOT23-8 .............................. 100 ..... 55 ... 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
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
)/
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.
MP1472 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
MP1472 Rev. 1.0 www.MonolithicPower.com 3
9/2/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
V
IN
= 12V, T
A
= +25°C, unless otherwise noted.
Parameter Symbol Condition Min Typ Max Units
Shutdown Supply Current V
EN
= 0V 1 3.0 A
Supply Current V
EN
= 5.0V; V
FB
= 1.0V 1.3 1.5 mA
Feedback Voltage V
FB
4.75V
V
IN
18V
0.900 0.923 0.946 V
Feedback Overvoltage Threshold 1.1 V
Error Amplifier Voltage Gain
(
5
)
A
EA
400 V/V
Error Amplifier Transconductance G
EA
I
C
=
10A
800 A/V
High-Side Switch On Resistance
(
5
)
R
DS
(
ON
)
1
175 m
Low-Side Switch On Resistance
(
5
)
R
DS
(
ON
)
2
115 m
High-Side Switch Leakage Current V
EN
= 0V, V
SW
= 0V 10 A
Upper Switch Current Limit Minimum Duty Cycle 3 4.1 5.3 A
Lower Switch Current Limit From Drain to Source 1.1 A
COMP to Current Sense
Transconductance
GCS 3.5 A/V
Oscillation Frequency F
osc1
305 340 375 kHz
Short Circuit Oscillation Frequency F
osc2
V
FB
= 0V 100 kHz
Maximum Duty Cycle D
MAX
V
FB
= 0.8V 90 %
Minimum On Time
(
5
)
220 ns
EN Shutdown Threshold Voltage V
EN
Rising 1.1 1.5 2.0 V
EN Shutdown Threshold Voltage
Hysteresis
210 mV
EN Lockout Threshold Voltage 2.2 2.5 2.7 V
EN Lockout Hysterisis 210 mV
Input Under Voltage Lockout
Threshold
V
IN
Rising 3.40 3.80 4.20 V
Input Under Voltage Lockout
Threshold Hysteresis
210 mV
Soft-Start Current V
SS
= 0V 6 A
Soft-Start Period C
SS
= 0.1F 15 ms
Thermal Shutdown
(
5
)
160 °C
Note:
5) Guaranteed by design, not tested.
P1-P3P4-P6P7-P9P10-P12P13-P13

MP1472GJ-P

Mfr. #:
Buy MP1472GJ-P
Manufacturer:
Monolithic Power Systems (MPS)
Description:
Switching Voltage Regulators 2A, 18V Sync Step-Down DCDC
Lifecycle:
New from this manufacturer.
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