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MP2115DQ-LF-P

P1-P3P4-P6P7-P9P10-P11
MP2115
2A Synchronous Step-Down Converter
with Programmable Input Current Limit
MP2115 Rev. 1.0 www.MonolithicPower.com 1
2/28/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP2115 is a high frequency, current mode,
PWM step-down converter with integrated input
current limit switch. The step-down converter
integrates a main switch and a synchronous
rectifier for high efficiency without an external
Schottky diode. The input average current limit
can be externally programmed. It is ideal for
powering portable equipment that is powered
by an USB port. The MP2115 can supply 2A of
load current from a 2.8V to 6V input voltage.
The output voltage can be regulated as low as
0.6V.
The MP2115 is available in a space-saving
10-pin QFN package.
FEATURES
• High Efficiency: Up to 92%
• Programmable Switching Frequency from
0.7MHz-2MHz
• Programmable Input Current Limit
• 2A Available Load Current
• 2.8V to 6V Input Voltage Range
• Output Voltage as Low as 0.6V
• Current Mode Control
• Power Good Indicator
• Short Circuit Protection
• Thermal Fault Protection
• <0.1µA Shutdown Current
• Space Saving 3mm x 3mm QFN10 Package
APPLICATIONS
• USB Powered Devices
• Cellular and Smart Phones
• Microprocessors and DSP Core Supplies
• PDAs
• MP3 Players
• Digital Still and Video Cameras
• Portable Instruments
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
R4
100k
R3
100k
6TPE470MI x 3
USB Input
VIN
VSYS
AGND
FREG
ILIM
PGND
FB
SW
EN
PG
MP2115DQ
U1
1
8
4
5
2
6
3
7
9
10
R6
86.6k
C5
220pF
3.8V/2A
R5
24.9k
R1
51k
R2
9.53k
VSYS
PG
EN
VOUT
EFFICIENCY (%)
Efficiency
V
OUT
=3.8V, Freq=1.5MHz
50
60
70
80
90
100
0.0 0.1 0.2 0.3 0.4 0.5 0.6
LOAD CURRENT ( A )
V
IN
=5.0V
V
IN
=5.5V
MP2115 – 2A, 6V SYNCHRONOUS STEP-DOWN CONVERTER
MP2115 Rev. 1.0 www.MonolithicPower.com 2
2/28/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
ORDERING INFORMATION
Part Number* Package Top Marking Free Air Temperature (T
A
)
MP2115DQ
QFN10 (3mm x 3mm)
2X
-40°C to +85°C
* For Tape & Reel, add suffix –Z (e.g. MP2115DQ–Z).
For RoHS compliant packaging, add suffix –LF (e.g. MP2115DQ–LF–Z)
PACKAGE REFERENCE
TOP VIEW
1
2
3
4
5
10
9
8
7
6
EXPOSED PAD
ON BACKSIDE
CONNECT TO GND
VIN
ILIM
FB
GND
FREQ
PGND
SW
VSYS
EN
PG
ABSOLUTE MAXIMUM RATINGS
(1)
V
IN
to GND ................................... -0.3V to +6.5V
V
SW
to GND ............................ -0.3V to V
IN
+0.3V
V
FB
, V
EN
, PG, VSYS, ILIM to GND
............................................... -0.3V to +6.5V
Continuous Power Dissipation (T
A
= +25°C)
(2)
............................................................. 2.5W
Junction Temperature ............................ +150°C
Lead Temperature ................................. +260°C
Storage Temperature .............. -65°C to +150°C
Recommended Operating Conditions
(3)
Supply Voltage V
IN
............................. 2.8V to 6V
Output Voltage V
OUT
........................... 0.6V to 6V
Maximum Junction Temp. (T
J
) ............... +125°C
Thermal Resistance
(4)
θ
JA
θ
JC
QFN10 (3x3) ........................... 50 ...... 12 ... °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 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.
MP2115 – 2A, 6V SYNCHRONOUS STEP-DOWN CONVERTER
MP2115 Rev. 1.0 www.MonolithicPower.com 3
2/28/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
(5)
V
IN
= V
EN
= 5.0V, T
A
= +25°C, unless otherwise noted.
Parameter Symbol Condition Min Typ Max Units
Supply Current V
EN
= V
IN
, V
FB
= 0.65V 800 1000 µA
Shutdown Current V
EN
= 0V, V
IN
= 6V 0.10 1 µA
IN Undervoltage Lockout Threshold Rising Edge 2.2 2.35 2.45 V
IN Undervoltage Lockout Hysteresis 60 mV
Regulated FB Voltage V
FB
T
A
= +25°C 0.595 0.607 0.619
V
-40°C ≤ T
A
≤ +85°C 0.589 0.607 0.625
FB Input Bias Current V
FB
= 0.65V -50 0.5 +50 nA
PFET On Resistance I
SW
= 100mA 0.1 Ω
NFET On Resistance I
SW
= -100mA 0.1 Ω
Load Switch PFET On Resistance 0.22 Ω
Load Switch Current Set R
ILIM
=25kΩ 500 mA
SW Leakage Current
V
EN
= 0V, V
IN
= 6V,
V
SW
= 0V or 6V
-1 +1 µA
PFET Current Limit
（6）
3.5 A
Oscillator Frequency f
OSC
R
FREQ
= 100kΩ 1.05 1.3 1.55 MHz
Thermal Shutdown Trip Threshold 145
°C
EN Input Low Voltage 0.3 1.32 1.45 V
En Input High Voltage 1.65 1.75 2 V
EN Input Current V
IN
= 0V to 6V -1 1 µA
Power Good Ramp Up Threshold C5=220pF 80 %
Power Good Ramp Down Threshold 70 %
Soft Start Time 100 µs
Power Good Sink Current Capability V
PG
Sink 4mA 0.5 V
Power Good Leakage Current I
PG LEAK
V
PG
= 3.3V -50 50 nA
Note:
5) 100% production test at +25°C. Specifications over the temperature range are guaranteed by design and characterization.
6）Guaranteed by design
P1-P3P4-P6P7-P9P10-P11

MP2115DQ-LF-P

Mfr. #:
Buy MP2115DQ-LF-P
Manufacturer:
Monolithic Power Systems (MPS)
Description:
Switching Voltage Regulators 2A Step-Down Converter
Lifecycle:
New from this manufacturer.
Delivery:
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