MP2143
3A, 5.5V, 1.2MHz, 40μA I
Q
, COT
Synchronous Step Down Switcher
The Future of Analog IC Technology
DESCRIPTION
The MP2143 is a monolithic, step-down, switch-
mode converter with internal power MOSFETs.
It can achieve up to 3A continuous output
current from a 2.5V–to-5.5V input voltage with
excellent load and line regulation. The output
voltage can be regulated as low as 0.6V.
Constant-on-time control provides fast transient
response and eases loop stabilization. Fault-
condition protections include cycle-by-cycle
current limiting and thermal shutdown.
The MP2143 is available in small TSOT23-8
package and requires only a minimal number of
readily-available standard external components.
The MP2143 is ideal for a wide range of
applications including high-performance DSPs,
FPGAs, smartphones, portable instruments,
and DVD drivers.
FEATURES
Wide 2.5V-to-5.5V Operating Input Range
Output Voltage as Low as 0.6V
100% Duty Cycle in Dropout
Up to 3A Output Current
Low I
Q
: 40µA
80mΩ and 40mΩ Internal Power MOSFET
Switches
Default 1.2MHz Switching Frequency
EN and Power-Good for Power Sequencing
Cycle-by-Cycle Over-Current Protection
Auto Discharge at Power Off
Short-Circuit Protect with Hiccup Mode
Stable with Low-ESR Output Ceramic
Capacitors
Available in a TSOT23-8 Package
Low Voltage I/O System Power
Handheld/Battery-powered Systems
Wireless/Networking Cards
APPLICATIONS
All MPS parts are lead-free, halogen free, and adhere to the RoHS directive.
For MPS green status, please visit MPS website under Quality
Assurance. “MPS” and “The Future of Analog IC Technology” are Registered
Trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
VIN
2.5V to 5.5V
C1
10 F
EN
PG
L1
1 H
VOUT
1.2V/2A
C2
10 F
2
VIN
SW
3
OUT
MP2143
5
R1
200k
R2
200k
8
EN
FB
7
1
PG
PGND AGND
4
6
MP2143 Rev. 1.07
10/19/2017
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
1
MP2143 – 3A, 5.5V, 1.2MHz, 40μA I
Q
, COT SYNCHRONOUS STEP-DOWN SWITCHER
ORDERING INFORMATION
Part Number*
MP2143DJ
Package
TSOT23-8
Top Marking
See Below
* For Tape & Reel, add suffix –Z (e.g. MP2143DJ–Z);
For RoHS compliant packaging, add suffix –LF (e.g. MP2143DJ–LF–Z)
TOP MARKING
ACE: product code of MP2143DJ;
Y: year code;
PACKAGE REFERENCE
TOP VIEW
PG
VIN
SW
PGND
1
2
3
4
8
7
6
5
EN
FB
AGND
OUT
TSOT23-8
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage V
IN
......................................... 6V
V
SW
......................................................................
-0.3V (-5V for < 10ns) to V
IN
+0.3V (10V for
<10ns)
All Other Pins .................................-0.3V to +6 V
Junction Temperature ...............................150°C
Lead Temperature ....................................260°C
(2)
Continuous Power Dissipation (T
A
= 25°C)
……….….. ............................................... 1.25W
Storage Temperature ............... -65°C to +150°C
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
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.
Recommended Operating Conditions
(3)
Supply Voltage V
IN
.......................... 2.5V to 5.5V
Output Voltage V
OUT
................. 0.6V to V
IN
-0.5V
Operating Junction Temp. (T
J
). -40°C to +125°C
MP2143 Rev. 1.07
10/19/2017
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
2
MP2143 – 3A, 5.5V, 1.2MHz, 40μA I
Q
, COT SYNCHRONOUS STEP-DOWN SWITCHER
ELECTRICAL CHARACTERISTICS
(5)
V
IN
= 5V, T
A
= 25°C, unless otherwise noted.
Parameter
Feedback Voltage
Feedback Current
PFET Switch ON Resistance
NFET Switch ON Resistance
Switch Leakage
PFET Current Limit
NFET Switch Sinking Current
ON Time
Switching frequency
Minimum OFF Time
Soft-Start Time
Soft-Stop Time
Power-Good Upper Trip
Threshold
Power-Good Lower Trip
Threshold
Power-Good Delay
Power-Good Sink Current
Capability
Power-Good Logic High Voltage
Power-Good Internal Pull-Up
Resistor
Under-Voltage Lockout Threshold
Rising
Under-Voltage Lockout Threshold
Hysteresis
EN Input Logic Low Voltage
EN Input Logic High Voltage
EN Input Current
V
EN
=2V
V
EN
=0V
I
NSW
t
ON
f
s
t
MIN-OFF
t
SS-ON
t
SS-OFF
PG
H
PG
L
PG
D
V
PG-L
V
PG-H
R
PG
2.0
Sink 1mA
V
IN
=5V, V
FB
=0.6V
4.9
500
2.2
150
0.4
1.2
2
0.1
2.4
FB voltage respect to the
regulation
V
OUT
=1.2V, V
FB
=0.7V
V
IN
=5V, V
OUT
=1.2V
V
IN
=3.6V, V
OUT
=1.2V
V
IN
=5V, V
OUT
=1.2V, I
OUT
=1A
T
A
=-40
o
C to +85
o
C
Symbol
V
FB
I
FB
R
DSON_P
R
DSON_N
V
EN
= 0V, V
IN
= 5V
V
SW
= 0V and 5V
4.2
Condition
2.5V
≤
V
IN
≤
5.5V
T
A
=-40
o
C to +85
o
C
V
FB
= 0.63V
Min
-1.5%
-2%
10
80
40
0.1
4.8
100
200
277
1200
1200
50
1.3
1
+10%
-10%
110
0.4
2
Typ
0.600
Max
+1.5%
+2%
Units
V/%
nA
mΩ
mΩ
μA
A
μA
nS
+20%
+25%
kHz
kHz
ns
ms
ms
%
%
μs
V
V
kΩ
V
mV
V
V
μA
μA
-20%
-25%
MP2143 Rev. 1.07
10/19/2017
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
3
MP2143 – 3A, 5.5V, 1.2MHz, 40μA I
Q
, COT SYNCHRONOUS STEP-DOWN SWITCHER
ELECTRICAL CHARACTERISTICS
(5)
(continued)
V
IN
= 5V, T
A
= 25°C, unless otherwise noted.
Parameter
Supply Current (Shutdown)
Supply Current (Quiescent)
Thermal Shutdown
Thermal Hysteresis
Notes:
5) Guaranteed by design.
Symbol
Condition
V
EN
=0V
V
EN
=2V,
V
IN
=3.6V
V
FB
=0.63V,
Min
Typ
0.1
40
150
30
Max
Units
μA
μA
°C
°C
MP2143 Rev. 1.07
10/19/2017
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
4
MP2143 – 3A, 5.5V, 1.2MHz, 40μA I
Q
, COT SYNCHRONOUS STEP-DOWN SWITCHER
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
= 5V, V
OUT
= 1.2V, L = 1.0µH, C
OUT
=22µF, T
A
= 25°C, unless otherwise noted.
0.01
0.1
1
10
0.001
0.01
0.1
1
10
2 2.5
3 3.5
4
4.5 5 5.5
6
0.60%
0.40%
0.20%
ERROR
0.00%
-0.20%
-0.40%
0
2 2.5
3 3.5
4 4.5
5
5.5 6
-0.60%
0
0.5
1
1.5
2
2.5
3
3.5
2.0
3.0
4.0
5.0
6.0
80
70
60
50
40
30
20
10
0
0 0.5
1 1.5
2 2.5
3 3.5
4
MP2143 Rev. 1.07
10/19/2017
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
5
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