MP1584 – 3A, 1.5MHz, 28V STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS
V
IN
= 12V, V
EN
= 2.5V, V
COMP
= 1.4V, T
A
= +25C, unless otherwise noted.
Parameter
Feedback Voltage
Upper Switch On Resistance
Upper Switch Leakage
Current Limit
COMP to Current Sense
Transconductance
Error Amp Voltage Gain
(5)
Error Amp Transconductance
Error Amp Min Source current
Error Amp Min Sink current
VIN UVLO Threshold
VIN UVLO Hysteresis
Soft-Start Time
(5)
Oscillator Frequency
Shutdown Supply Current
Quiescent Supply Current
Thermal Shutdown
Thermal Shutdown Hysteresis
Minimum Off Time
(5)
Minimum On Time
(5)
EN Up Threshold
EN Hysteresis
Note:
5) Guaranteed by design.
Symbol Condition
V
FB
R
DS(ON)
4.5V < V
IN
< 28V
V
BST
– V
SW
= 5V
V
EN
= 0V, V
SW
= 0V, V
IN
= 28V
Min
0.776
Typ
0.8
150
1
4.7
9
Max
0.824
Units
V
mΩ
μA
A
A/V
4.0
G
CS
I
COMP
= ±3µA
V
FB
= 0.7V
V
FB
= 0.9V
40
2.7
0V < V
FB
< 0.8V
R
FREQ
= 100kΩ
V
EN
= 0V
No load, V
FB
= 0.9V
200
60
5
–5
3.0
0.35
1.5
900
12
100
150
15
100
100
1.5
300
80
3.3
V/V
µA/V
µA
µA
V
V
ms
kHz
µA
µA
C
C
ns
ns
V
mV
20
125
1.35
1.65
MP1584 Rev. 1.0
8/8/2011
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
3
MPS [ MONOLITHIC POWER SYSTEMS ]
