MP1583 – 3A, 23V, 385KHz STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS
VIN = 12V, TA = +25°C, unless otherwise noted.
Parameters
Symbol Condition
Min
Typ
20
Max Units
Shutdown Supply Current
Supply Current
VEN = 0V
30
µA
mA
V
VEN = 2.8V, VFB =1.4V
4.75V ≤ VIN ≤ 23V
1.0
1.2
Feedback Voltage
VFB
AVEA
1.194 1.222 1.250
400
Error Amplifier Voltage Gain
Error Amplifier Transconductance
High-Side Switch On-Resistance
Low-Side Switch On-Resistance
High-Side Switch Leakage Current
Current Limit
V/V
GEA
500
800 1120 µA/V
ΔICOMP = ±10μA
RDS(ON)1
RDS(ON)2
0.1
10
Ω
Ω
VEN = 0V, VSW = 0V
0
10
µA
A
4.0
4.9
3.8
385
40
6.0
Current Sense to COMP Transconductance
Oscillation Frequency
GCS
fS
A/V
KHz
KHz
%
335
25
435
55
Short Circuit Oscillation Frequency
Maximum Duty Cycle
VFB = 0V
DMAX
VFB = 1.0V
VFB = 1.5V
90
Minimum Duty Cycle
0
%
EN Shutdown Threshold Voltage
Enable Pull Up Current
EN UVLO Threshold
0.9
1.1
1.2
1.8
1.5
2.5
V
VEN = 0V
µA
V
VEN Rising
2.37 2.54 2.71
EN UVLO Threshold Hysteresis
Soft-Start Period
210
10
mV
ms
°C
CSS = 0.1µF
Thermal Shutdown
160
MP1583 Rev. 3.1
6/20/2011
www.MonolithicPower.com
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3
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