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MP28115DQ-LF-Z

P1-P3P4-P6P7-P9P10-P11
MP28115
4A, 1.5MHz Synchronous
Step-Down Converter
MP28115 Rev. 0.92 www.MonolithicPower.com 1
1/6/2016 MPS Proprietary Information. Patent Protected.
Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP28115 is an internally compensated
1.5MHz fixed frequency PWM synchronous
step-down regulator. MP28115 operates from a
2.7V to 6V input and generates an adjustable
output voltage from 0.8V to 0.9xV
IN
at up to 4A
load current.
The MP28115 integrates a 60mΩ high-side
switch and a 60mΩ synchronous rectifier for
high efficiency without an external Schottky
diode. With peak current mode control and
internal compensation, the MP28115 based
solution achieves minimum footprint and
component count. Fault condition protection
includes Hiccup short-circuit protection, cycle-
by-cycle current limiting and thermal shutdown.
Other features include frequency
synchronization input, internal soft-start and
power good output.
The MP28115 is available in a small 3mm x
3mm 10-lead QFN package.
FEATURES
• 4A Output Current
• Input Operation Range: 2.7V to 6V
• 1.5% Output Accuracy
• 60mΩ Internal Power MOSFET Switches
• All Ceramic Capacitor Design
• Up to 95% Efficiency
• 1.5MHz Fixed Switching Frequency
• Internal Soft-Start
• Frequency Synchronization Input
• Power Good Output
• Cycle-by-Cycle Current Limiting
• Hiccup Short Circuit Protection
• Thermal Shutdown
• 3mm x 3mm 10-lead QFN Package
APPLICATIONS
• µP/ASIC/DSP/FPGA Core and I/O Supplies
• Printers and LCD TVs
• Network and Telecom Equipment
• Point of Load Regulators
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
BSIN
POK
SW
EN/SYNC FB
GND
MP28115
4,7 5
3,8
1
2,9
6
10
Vin
2.7V to 6V
Vout
1.8V/4A
C3
47uF
R1
400k
R2
316k
L1
1uH
C4
100nF
C2
10uF
R3
100k
R4
100k
C1
10uF
D1
B0530
Efficiency vs
Output Current
0
70
75
85
90
95
80
1234
EFFICIENCY (%)
OUTPUT CURRENT (A)
5V to 2.5V
5V to 1.8V
5V to 3.3V
MP28115 – 4A, 1.5MHz SYNCHRONOUS STEP-DOWN CONVERTER
MP28115 Rev. 0.92 www.MonolithicPower.com 2
1/6/2016 MPS Proprietary Information. Patent Protected.
Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
PACKAGE REFERENCE
TOP VIEW
FB
GND
SW
IN
BS
1
2
3
4
5
EN/SYNC
GND
SW
IN
POK
10
9
8
7
6
EXPOSED PAD
ON BACKSIDE
Part Number* Package Temperature
MP28115DQ
QFN10
(3mm x 3mm)
–40°C to +85°C
*
For Tape & Reel, add suffix –Z (e.g. MP28115DQ–Z)
For RoHS Compliant Packaging, add suffix –LF
(e.g. MP28115DQ–LF–Z)
ABSOLUTE MAXIMUM RATINGS
(1)
IN to GND ....................................-0.3V to +6.5V
SW to GND........................... -0.3V to V
IN
+ 0.3V
SW to GND............ -2.5V to V
IN
+2.5V for <50nS
FB, EN/SYNC, POK to GND...........-0.3V to +6.5V
BS to SW .....................................-0.3V to +6.5V
Junction Temperature...............................150°C
Lead Temperature ....................................260°C
Storage Temperature ...............-65°C to +150°C
Recommended Operating Conditions
(2)
Supply Voltage V
IN
............................. 2.7V to 6V
Output Voltage V
OUT
................. 0.8V to 0.9 x V
IN
Operating Temperature ..............-40°C to +85°C
Thermal Resistance
(3)
θ
JA
θ
JC
QFN10 (3mm x 3mm) ............. 50 ...... 12... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
3) Measured on approximately 1” square of 1 oz copper.
ELECTRICAL CHARACTERISTICS
(4)
V
IN
= V
EN
= 3.6V, T
A
= +25°C, unless otherwise noted.
Parameters Condition Min Typ Max Units
Supply Current
V
EN
= V
IN
V
FB
= 0.85V
750 μA
Shutdown Current V
EN
= 0V, V
IN
= 6V 1 μA
IN Undervoltage Lockout
Threshold
Rising Edge 2.59 2.69 V
IN Undervoltage Lockout
Hysteresis
210 mV
T
A
= +25°C 0.788 0.800 0.812 V
Regulated FB Voltage
–40°C ≤ T
A
≤ +85°C 0.780 0.800 0.820 V
FB Input Current V
FB
= 0.85V ±50 nA
EN High Threshold –40°C ≤ T
A
≤ +85°C 1.6 V
EN Low Threshold –40°C ≤ T
A
≤ +85°C 0.4 V
Internal Soft-Start Time 120 µs
High-Side Switch On-Resistance I
SW
= 300mA 60 mΩ
Low-Side Switch On-Resistance I
SW
= –300mA 60 mΩ
SW Leakage Current
V
EN
= 0V; V
IN
= 6V
V
SW
= 0V or 6V
–10 10 μA
BS Under Voltage Lockout
Threshold
1.8 V
MP28115 – 4A, 1.5MHz SYNCHRONOUS STEP-DOWN CONVERTER
MP28115 Rev. 0.92 www.MonolithicPower.com 3
1/6/2016 MPS Proprietary Information. Patent Protected.
Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
(4)
(continued)
V
IN
= V
EN
= 3.6V, T
A
= +25°C, unless otherwise noted.
Parameters Condition Min Typ Max Units
High-Side Switch Current Limit Sourcing TBD 6.5 A
Low-Side Switch Current Limit Sinking 3.5 A
Oscillator Frequency 1.2 1.5 1.8 MHz
Maximum Synch Frequency 2 MHz
Minimum Synch Frequency 1 MHz
Minimum On Time 50 ns
Maximum Duty Cycle 90 %
POK Upper Trip Threshold FB respect to the nominal value 10 %
POK Lower Trip Threshold FB respect to the nominal value -10 %
POK Output Voltage Low I
SINK
= 5mA 0.4 V
POK Deglitch Timer 30 μs
Thermal Shutdown Threshold Hysteresis = 20°C 150 °C
Note:
4) Production test at +25°C. Specifications over the temperature range are guaranteed by design and characterization.
PIN FUNCTIONS
Pin # Name Description
6 POK
Open Drain Power Good Output. “HIGH” output indicates V
OUT
is within ±10% window.
“LOW” output indicates V
OUT
is out of ±10% window. POK is pulled down in shutdown.
4, 7 IN
Input Supply. A decoupling capacitor to ground is required close to these pins to reduce
switching spikes.
3, 8 SW
Switch Node Connection to the Inductor. These pins connect to the internal high and low-
side power MOSFET switches. All SW pins must be connected together externally.
2, 9 GND
Ground. Connect these pins with larger copper areas to the negative terminals of the input
and output capacitors.
5 BS
Bootstrap. A capacitor between this pin and SW provides a floating supply for the high-side
gate driver.
1 FB
Feedback. This is the input to the error amplifier. An external resistive divider connects this
pin between the output and GND. The voltage on the FB pin to the internal 0.8V reference
to set the regulation voltage.
10 EN/SYNC
Enable and Frequency Synchronization Input Pin. Forcing this pin below 0.4V shuts down
the part. Forcing this pin above 1.6V turns on the part. Applying a 1MHz to 2MHz clock
signal to this pin synchronizes the internal oscillator frequency to the external clock.
P1-P3P4-P6P7-P9P10-P11

MP28115DQ-LF-Z

Mfr. #:
Buy MP28115DQ-LF-Z
Manufacturer:
Monolithic Power Systems (MPS)
Description:
Switching Voltage Regulators 4A, 6V, 1.5MHz Synch Step-Down
Lifecycle:
New from this manufacturer.
Delivery:
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