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MP2560DN-LF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19
MP2560 – 2.5A, 4MHz, 42V STEP-DOWN CONVERTER
MP2560 Rev. 1.21 www.MonolithicPower.com 4
2/28/2014 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
PIN FUNCTIONS
QFN
Pin #
SOIC8
Pin #
Name Description
1, 2 1 SW
Switch Node. This is the output from the high-side switch. A low forward drop
Schottky diode to ground is required. The diode must be close to the SW pins to
reduce switching spikes.
3 2 EN
Enable Input. Pulling this pin below the specified threshold shuts the chip down.
Pulling it up above the specified threshold or leaving it floating enables the chip.
4 3 COMP
Compensation. This node is the output of the error amplifier. Control loop frequency
compensation is applied to this pin.
5 4 FB
Feedback. This is the input to the error amplifier. The output voltage is set by a
resistive divider connected between the output and GND which scales down V
OUT
equal to the internal +0.8V reference.
6 5
GND,
Exposed
Pad
Ground. It should be connected as close as possible to the output capacitor to
shorten the high current switch paths. Connect exposed pad to ground plane.
7 6 FREQ
Switching Frequency Program Input. Connect a resistor from this pin to ground to set
the switching frequency.
8, 9 7 VIN
Input Supply. This supplies power to all the internal control circuitry, both BS
regulators and the high-side switch. A decoupling capacitor to ground must be placed
close to this pin to minimize switching spikes.
10 8 BST
Bootstrap. This is the positive power supply for the internal floating high-side
MOSFET driver. Connect a bypass capacitor between this pin and SW pin.
MP2560 – 2.5A, 4MHz, 42V STEP-DOWN CONVERTER
MP2560 Rev. 1.21 www.MonolithicPower.com 5
2/28/2014 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
= 12V, V
OUT
=5V, C1 = 10µF, C2 = 22µF, L1 = 10µH and T
A
= +25C, unless otherwise noted.
Efficiency vs
Load Current
100
90
80
70
60
50
40
EFFICIENCY (%)
0 0.5 1.0 1.5 2.0 2.5
LOAD CURRENT (A)
V
OUT
=2.5V
fs=500kHz
V
IN
=12V
V
IN
=24V
V
IN
=5V
V
SW
10V/div.
V
OUT
AC Coupled
10mV/div.
I
L
1A/div.
V
SW
10V/div.
V
OUT
AC Coupled
20mV/div.
I
L
1A/div.
Steady State
I
OUT
= 0.1A
Steady State
I
OUT
= 1A
Efficiency vs
Load Current
100
90
80
70
60
50
40
EFFICIENCY (%)
0 0.5 1.0 1.5 2.0 2.5
LOAD CURRENT (A)
V
OUT
=5V
fs=500kHz
V
IN
=24V
V
IN
=12V
Oscillating Frequency
vs R
freq
4000
3500
3000
2500
2000
1500
1000
500
0
OSCILLATIONG EFFICIENCY (KHz)
10 100 1000
Steady State
I
OUT
= 2A
V
SW
10V/div.
V
OUT
AC Coupled
20mV/div.
I
L
2A/div.
MP2560 – 2.5A, 4MHz, 42V STEP-DOWN CONVERTER
MP2560 Rev. 1.21 www.MonolithicPower.com 6
2/28/2014 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
V
IN
= 12V, V
OUT
=5V, C1 = 10µF, C2 = 22µF, L1 = 10µH and T
A
= +25C, unless otherwise noted.
1ms/div.
Startup
I
OUT
= 0.1A
1ms/div.
Shutdown
I
OUT
= 0.1A
1ms/div.
Startup
I
OUT
= 1A
Shutdown
I
OUT
= 1A
1ms/div.
Startup
I
OUT
= 2A
V
OUT
2V/div.
I
L
1A/div.
V
SW
10V/div.
V
EN
5V/div.
V
OUT
2V/div.
I
L
1A/div.
V
SW
10V/div.
V
EN
5V/div.
V
OUT
2V/div.
I
L
1A/div.
V
SW
10V/div.
V
EN
5V/div.
V
OUT
2V/div.
I
L
1A/div.
V
SW
10V/div.
V
EN
5V/div.
V
OUT
2V/div.
I
L
2A/div.
V
SW
10V/div.
V
EN
5V/div.
V
OUT
2V/div.
I
L
1A/div.
Short Circuit Entry
I
OUT
= 0.1A to Short
Short Circuit Recovery
I
OUT
= Short to 0.1A
Shutdown
I
OUT
= 2A
V
OUT
2V/div.
I
L
1A/div.
V
OUT
2V/div.
I
L
2A/div.
V
SW
10V/div.
V
EN
5V/div.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P19

MP2560DN-LF

Mfr. #:
Buy MP2560DN-LF
Manufacturer:
Monolithic Power Systems (MPS)
Description:
Switching Voltage Regulators 2.5A, 4MHz, 42V Step-Down Converter
Lifecycle:
New from this manufacturer.
Delivery:
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