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MP1492DS-LF-Z

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18
MP1492 – 2A, 4.2V-16V INPUT, FAST TRANSIENT SYNCHRONOUS STEP-DOWN CONVERTER
MP1492 Rev. 1.1 www.MonolithicPower.com 4
3/13/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
PIN FUNCTIONS
SOIC8
Pin #
Name Description
1 IN
Supply Voltage. The MP1492 operates from a +4.2V to +16V input rail. C1 is needed to
decouple the input rail. Use wide PCB traces and multiple vias to make the connection.
2 GND
System Ground. This pin is the reference ground of the regulated output voltage. For this
reason care must be taken in PCB layout.
3 SW Switch Output. Use wide PCB traces and multiple vias to make the connection.
4 BST
Bootstrap. A capacitor connected between SW and BST pins is required to form a floating
supply across the high-side switch driver.
5 BYP
Internal LDO output. Decouple with a 1µF ceramic capacitor. X7R or X5R grade dielectric
ceramic capacitors are recommended for their stable temperature characteristics.
6 EN
EN=1 to enable the MP1492. For automatic start-up, connect EN pin to VIN with a pull-up
resistor.
7 FB
Feedback. An external resistor divider from the output to GND, tapped to the FB pin, sets
the output voltage.
8 FREQ
Frequency. Setting Pin. Sets the full-load switching frequency driving CCM operation..
Connect a resistor R
7
to IN to set the switching frequency. An optional 1nF decoupling
capacitor can be added to improve any switching frequency jitter that may be present.
MP1492 – 2A, 4.2V-16V INPUT, FAST TRANSIENT SYNCHRONOUS STEP-DOWN CONVERTER
MP1492 Rev. 1.1 www.MonolithicPower.com 5
3/13/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
=12V, V
OUT
=1.2V, L=2.2µH, T
A
=+25°C, unless otherwise noted.
Line Regulation
I
OUT
=2A
Load Regulation
V
OUT
VS. I
OUT
V
OUT
=1.2V, Freq=500kHz
Frequency vs. Temperature
0.01 0.1 1 2
I
OUT
(A)
I
OUT
(A)
I
OUT
(A)
60
65
70
75
80
85
90
95
100
V
IN
(V)
-1.00
-0.80
-0.60
-0.40
-0.20
0.00
0.20
0.40
0.60
0.80
1.00
00.511.52
0
5
10
15
20
25
30
00.511.52
Case Temprature Rise
vs. Load Current
V
IN
=12V, V
OUT
=5V
400
405
410
415
420
425
430
435
440
445
450
-40 -20 0 20 40 60 80 100 120140
F
SW
(kHZ)
V
IN
=8V
V
IN
=12V
V
IN
=12V
No air flow
-0.6
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0 5 10 1516
1.1
1.12
1.14
1.16
1.18
1.2
1.22
1.24
0.01 0.1 1 10
I
OUT
(A)
V
OUT
(V)
V
IN
=12V
V
IN
=16V
V
IN
=8V V
IN
=5V
MP1492 – 2A, 4.2V-16V INPUT, FAST TRANSIENT SYNCHRONOUS STEP-DOWN CONVERTER
MP1492 Rev. 1.1 www.MonolithicPower.com 6
3/13/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
V
IN
=12V, V
OUT
=1.2V, L=2.2µH, T
A
=+25°C, unless otherwise noted.
V
OUT
/AC
50mV/div.
V
IN
/AC
50mV/div.
V
SW
10V/div.
I
L
1A/div.
V
OUT
/AC
20mV/div.
V
IN
/AC
20mV/div.
V
SW
10V/div.
I
L
2A/div.
V
OUT
/AC
10mV/div.
V
IN
/AC
100mV/div.
V
SW
10V/div.
I
L
2A/div.
Input/Output Voltage Ripple
I
OUT
= 0A
Input/Output Voltage Ripple
I
OUT
= 0.3A
Input/Output Voltage Ripple
I
OUT
= 2A
Start Up Through VIN
I
OUT
= 0A
Start Up Through VIN
I
OUT
= 2A
Shut Down Through VIN
I
OUT
= 0A
Shut Down Through VIN
I
OUT
=2A
Start Up Through EN
I
OUT
=0A
Start Up Through EN
I
OUT
= 2A
V
OUT
500mV/div.
V
IN
10V/div.
V
SW
10V/div.
I
L
1A/div.
V
OUT
500mV/div.
V
IN
10V/div.
V
SW
10V/div.
I
L
2A/div.
V
OUT
500mV/div.
V
IN
10V/div.
V
SW
10V/div.
I
L
2A/div.
V
OUT
500mV/div.
V
IN
5V/div.
V
SW
10V/div.
I
L
2A/div.
V
OUT
500mV/div.
V
EN
10V/div.
V
SW
10V/div.
I
L
1A/div.
V
OUT
500mV/div.
V
EN
10V/div.
V
SW
10V/div.
I
L
2A/div.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18

MP1492DS-LF-Z

Mfr. #:
Buy MP1492DS-LF-Z
Manufacturer:
Monolithic Power Systems (MPS)
Description:
Switching Voltage Regulators 2A 4.2-16V Fast Trns Synch Step-Down
Lifecycle:
New from this manufacturer.
Delivery:
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