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MP1472 Datasheet(PDF) 3 Page - Monolithic Power Systems

Part # MP1472
Description  2A, 18V Synchronous Rectified Step-Down Converter
PDF  13 Pages
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Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems

MP1472 Datasheet(HTML) 3 Page - Monolithic Power Systems

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MP1472 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
MP1472 Rev. 1.0
www.MonolithicPower.com
3
9/2/2011
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = +25°C, unless otherwise noted.
Parameter
Symbol Condition
Min
Typ
Max
Units
Shutdown Supply Current
VEN = 0V
1
3.0
μA
Supply Current
VEN = 5.0V; VFB = 1.0V
1.3
1.5
mA
Feedback Voltage
VFB
4.75V
 VIN  18V
0.900
0.923
0.946
V
Feedback Overvoltage Threshold
1.1
V
Error Amplifier Voltage Gain
(5)
AEA
400
V/V
Error Amplifier Transconductance
GEA
IC = 10μA
800
μA/V
High-Side Switch On Resistance
(5)
RDS(ON)1
175
mΩ
Low-Side Switch On Resistance
(5)
RDS(ON)2
115
mΩ
High-Side Switch Leakage Current
VEN = 0V, VSW = 0V
10
μA
Upper Switch Current Limit
Minimum Duty Cycle
3
4.1
5.3
A
Lower Switch Current Limit
From Drain to Source
1.1
A
COMP to Current Sense
Transconductance
GCS
3.5
A/V
Oscillation Frequency
Fosc1
305
340
375
kHz
Short Circuit Oscillation Frequency
Fosc2
VFB = 0V
100
kHz
Maximum Duty Cycle
DMAX
VFB = 0.8V
90
%
Minimum On Time
(5)
220
ns
EN Shutdown Threshold Voltage
VEN Rising
1.1
1.5
2.0
V
EN Shutdown Threshold Voltage
Hysteresis
210
mV
EN Lockout Threshold Voltage
2.2
2.5
2.7
V
EN Lockout Hysterisis
210
mV
Input Under Voltage Lockout
Threshold
VIN Rising
3.40
3.80
4.20
V
Input Under Voltage Lockout
Threshold Hysteresis
210
mV
Soft-Start Current
VSS = 0V
6
μA
Soft-Start Period
CSS = 0.1μF
15
ms
Thermal Shutdown
(5)
160
°C
Note:
5) Guaranteed by design, not tested.



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