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MP2115DQ-LF-P

P1-P3P4-P6P7-P9P10-P11
MP2115 – 2A, 6V SYNCHRONOUS STEP-DOWN CONVERTER
MP2115 Rev. 1.0 www.MonolithicPower.com 4
2/28/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
PIN FUNCTIONS
Pin # Name Description
1 VIN Supply Input for the power stage.
2 ILIM Input Current Limit setting pin. A resistor from this pin to ground sets the input current limit.
3 FB
Feedback Input. Connect FB to the center point of the external resistor divider. The feedback
threshold voltage is 0.6V.
4 AGND Analog Ground.
5 FREQ
Switching Frequency Program Input. Connect a resistor from this pin to ground to set the
switching frequency.
6
PGND
Exposed
Pad
The exposed pad and PGND pin must be connected to the same ground plane.
7 SW
Power Switch Output. Inductor connection to drains of the internal PFET and NFET switches.
8 VSYS
Load switch output and switching regulator input. Usually this pin connects to a large tantalum
capacitor as energy reservoir.
9 EN On/Off Control Input.
10 PG
Power good signal. When FB is less than 80% of 0.6V, PG is low. It is an open-drain output.
Use a high value pull-up resistor externally to pull it up to system power supply.
MP2115 – 2A, 6V SYNCHRONOUS STEP-DOWN CONVERTER
MP2115 Rev. 1.0 www.MonolithicPower.com 5
2/28/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS
C1=10µF, C2=470µFx3, C4=220µF, C5=220pF, L= 4.7µH, T
A
= +25°C, unless otherwise noted.
SWITCHING FREQUENCY (MHz)
INPUT CURRENT (A)
OUTPUT VOLTAGE (V)
V
IN
VOLTAGE(Y)
Load Regulation Loop Gain with Phase Margin
V
IN
= 5V, V
OUT
= 3.8V, I
OUT
= 0.5A
F
SW
vs. Resistor V
FB
vs. Temperature
V
IN
= 5V
I
LIMIT
Resistor vs.
Input Current
Transient Response
V
IN
= 5V, V
OUT
= 3.8V,
I
OUT
= 0.7A/4.66ms
F
SW
vs. Temperature
V
IN
= 5V
FREQUENCY (kHz)
EFFICIENCY (%)
LOAD CURRENT (A) LOAD CURRENT (A)
Efficiency vs.
Load Current
V
OUT
= 3.8V, Freq=1.5MHz
3.860
3.862
3.864
3.866
3.868
3.870
0.0 0.1 0.2 0.3 0. 4 0.5 0. 6
-50
-40
-30
-20
-10
0
10
20
30
40
50
0.1
1
10 100 1000
-180
-144
-108
-72
-36
0
36
72
108
144
180
0
10
20
30
40
50
60
70
0.2 0.28 0.36 0.44 0.52 0.6
0.4
0.8
1.2
1.6
2.0
50 100 150 200 250 300 350 400
V
OUT
0.1V/div.
I
OUT
1A/div.
V
OUT
0.1V/div.
I
OUT
0.5A/div.
0.50
0.53
0.56
0.59
0.62
0.65
-40 -20 0 20 40 60 80 100
1.30
1.31
1.32
1.33
1.34
1.35
-40 -20 0 20 40 60 80 100
SWITCHING FREQUENCY (MHz)
50
60
70
80
90
100
0.0 0.1 0.2 0.3 0.4 0.5 0.6
V
IN
=5.0V
V
IN
=5.5V
MP2115 – 2A, 6V SYNCHRONOUS STEP-DOWN CONVERTER
MP2115 Rev. 1.0 www.MonolithicPower.com 6
2/28/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
C1=10µF, C2=470µFx3, C4=220µF, C5=220pF, L= 4.7µH, T
A
= +25°C, unless otherwise noted.
V
SYS
5V/div.
V
SW
5V/div.
V
OUT
2V/div.
I
L
0.5A/div.
V
SYS
5V/div.
V
PG
5V/div.
V
OUT
2V/div.
I
OUT
0.5A/div.
V
SYS
5V/div.
V
PG
5V/div.
V
OUT
2V/div.
I
OUT
0.5A/div.
Steady State
V
IN
= 5V, V
EN
put to V
IN,
V
OUT
= 3.8V, I
OUT
= 0.5A, Freq
= 2MHz
Power Ramp Up
V
IN
= 5V, V
EN
put to V
IN,
V
OUT
= 3.8V, I
OUT
= 0.5A
Power Ramp Down
V
IN
= 5V, V
EN
put to V
IN,
V
OUT
= 3.8V, I
OUT
= 0.5A
Steady State
V
IN
= 5V, V
EN
put to V
IN,
V
OUT
= 3.8V,
I
OUT
= 0.5A, Freq
= 0.7MHz
Enable Up
V
IN
= 5V, V
EN
= 0-2V, V
OUT
= 3.8V,
I
OUT
= 0.5A, Resistor Load
Enable Down
V
IN
= 5V, V
EN
= 2-0V, V
OUT
= 3.8V,
I
OUT
= 0.5A, Resistor Load
V
OUT
2V/div.
I
L
5A/div.
V
OUT
2V/div.
I
L
2A/div.
Short Circuit
V
IN
= 5V, V
EN
put to V
IN,
V
OUT
= 3.8V
Short Circuit Recovery
V
IN
= 5V, V
EN
put to V
IN,
V
OUT
= 3.8V
V
SYS
5V/div.
V
SW
5V/div.
V
OUT
2V/div.
I
L
0.5A/div.
V
EN
2V/div.
V
SW
5V/div.
V
OUT
2V/div.
I
OUT
0.5A/div.
V
EN
2V/div.
V
SW
5V/div.
V
OUT
2V/div.
I
OUT
0.5A/div.
I
IN
0.1A/div.
0.5A
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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