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AAT1153IDE-0.6-T1

P1-P3P4-P6P7-P9P10-P12P13-P14
MP2144
2A, 5.5V, 1.2MHz, 40μA I
Q
, COT
Synchronous Step Down Switcher
MP2144 Rev. 1.03 www.MonolithicPower.com 1
12/20/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP2144 is a monolithic, step-down, switch-
mode converter with internal power MOSFETs.
It can achieve up to 2A continuous output
current from a 2.5V–to-5.5V input voltage with
excellent load and line regulation. The output
voltage can be regulated to as low as 0.6V.
The constant-on-time control scheme provides
fast transient response and eases loop
stabilization. Fault condition protections include
cycle-by-cycle current limiting and thermal
shutdown.
The MP2144 is available in small TSOT23-8
package and requires only a minimal number of
readily available standard external components.
The MP2144 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 2A Output Current
• Low IQ: 40µA
• 90m and 60m 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
APPLICATIONS
• Low Voltage I/O System Power
• Handheld/Battery-powered Systems
• Wireless/Networking Cards
All MPS parts are lead-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 Monolithi
c
Power Systems, Inc.
TYPICAL APPLICATION
MP2144
GND
FB
VIN
C1
10
F
EN
VIN
2.5V to 5.5V
VOUT
1.2V/2A
SW
C2
10
32
8
1
5
R1
200
R2
200k
PG
EN
PG
4, 6
OUT
7
L1
1
0
10
20
30
40
50
60
70
80
90
100
0.001 0.01 0.1 1 10
MP2144 – 2A, 5.5V, 1.2MHz. 40μA I
Q
, SYNCHRONOUS STEP-DOWN SWITCHER
MP2144 Rev. 1.03 www.MonolithicPower.com 2
12/20/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number* Package Top Marking
MP2144GJ TSOT23-8 ADL
* For Tape & Reel, add suffix –Z (e.g. MP2144GJ–Z);
PACKAGE REFERENCE
TOP VIEW
4
3
2
1
8
7
6
5
PG
VIN
SW
PGND
EN
FB
AGND
OUT
SOT23-8
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage V
IN
......................................... 6V
V
SW
........................ (-3V for < 5ns) to (V
IN
+0.3V)
All Other Pins.................................-0.3V to +6 V
Junction Temperature...............................150°C
Lead Temperature ....................................260°C
Continuous Power Dissipation (T
A
= 25°C)
(2)
……….….. ............................................... 1.25W
Storage Temperature............... -65°C to +150°C
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
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 powe
r
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.
MP2144 – 2A, 5.5V, 1.2MHz. 40μA I
Q
, SYNCHRONOUS STEP-DOWN SWITCHER
MP2144 Rev. 1.03 www.MonolithicPower.com 3
12/20/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
(5)
V
IN
= 5V, T
A
= 25°C, unless otherwise noted.
Parameter Symbol Condition Min Typ Max Units
2.5V V
IN
5.5V -1.5% 0.600 +1.5%
Feedback Voltage V
FB
T
A
=-40
o
C to +85
o
C -2% +2%
V/%
Feedback Current I
FB
V
FB
= 0.63V 10 nA
PFET Switch ON Resistance R
DSON_P
90 m
NFET Switch ON Resistance R
DSON_N
60 m
Switch Leakage
V
EN
= 0V, V
IN
= 5V
V
SW
= 0V and 5V
0.1 2 A
PFET Current Limit 3.3 3.8 A
NFET Switch Sinking Current I
NSW
V
OUT
=1.2V, V
FB
=0.7V 100 A
V
IN
=5V, V
OUT
=1.2V 200
ON Time t
ON
V
IN
=3.6V, V
OUT
=1.2V 277
nS
V
IN
=5V, V
OUT
=1.2V, I
OUT
=1A -20% 1200 +20% kHz
Switching frequency f
s
T
A
=-40
o
C to +85
o
C -25% 1200 +25% kHz
Minimum OFF Time t
MIN-OFF
50 ns
Soft-Start Time t
SS-ON
1.3 ms
Soft-Stop Time t
SS-OFF
1 ms
Power-Good Upper Trip
Threshold
PG
H
FB voltage with respect to
the regulation
+10% %
Power-Good Lower Trip
Threshold
PG
L
-10% %
Power-Good Delay PG
D
110 s
Power-Good Sink Current
Capability
V
PG-L
Sink 1mA 0.4 V
Power Good Logic High Voltage V
PG-H
V
IN
=5V, V
FB
=0.6V 4.9 V
Power Good Internal Pull-Up
Resistor
R
PG
500 k
Under-Voltage Lockout Threshold
Rising
2.0 2.2 2.4 V
Under-Voltage Lockout Threshold
Hysteresis
150 mV
EN Input Logic Low Voltage 0.4 V
EN Input Logic High Voltage 1.2 V
V
EN
=2V 2 A
EN Input Current
V
EN
=0V 0.1 A
Supply Current (Shutdown) V
EN
=0V 0.1 A
Supply Current (Quiescent)
V
EN
=2V, V
FB
=0.63V,
V
IN
=3.6V
40 A
Thermal Shutdown 150 °C
Thermal Hysteresis 30 °C
Notes:
5) Guaranteed by design.
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AAT1153IDE-0.6-T1

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IC REG BUCK ADJUSTABLE 2A 10TDFN
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