MP1495 – SYNCHRONOUS STEP-DOWN CONVERTER
ELECTRICAL CHARACTERISTICS
(6)
V
IN
= 12V, T
A
= 25°C, unless otherwise noted.
Parameter
Supply Current (Shutdown)
Supply Current (Quiescent)
HS Switch-ON Resistance
LS Switch-ON Resistance
Switch Leakage
Current Limit
(6)
Oscillator Frequency
Fold-Back Frequency
Maximum Duty Cycle
Minimum ON Time
(6)
Sync Frequency Range
Feedback Voltage
Feedback Current
EN Rising Threshold
EN Falling Threshold
EN Input Current
EN Turn-Off Delay
VIN Under-Voltage Lockout
Threshold-Rising
VIN Under-Voltage Lockout
Threshold-Hysteresis
VCC Regulator
VCC Load Regulation
Soft-Start Period
Thermal Shutdown
(6)
Thermal Hysteresis
(6)
Symbol
I
IN
I
q
HS
RDS-ON
LS
RDS-ON
SW
LKG
I
LIMIT
f
SW
f
FB
D
MAX
t
ON_MIN
f
SYNC
V
FB
I
FB
V
EN_RISING
V
EN_FALLING
I
EN
EN
td-off
INUV
Vth
INUV
HYS
V
CC
I
CC
=5mA
t
SS
3.7
V
EN
=2V
V
EN
=0
Condition
V
EN
= 0V
V
EN
= 2V, V
FB
= 1V, AAM=0.5V
V
BST-SW
=5V
V
CC
=5V
V
EN
= 0V, V
SW
=12V
Under 40% Duty Cycle
V
FB
=0.75V
V
FB
<400mV
V
FB
=700mV
Min
Typ
0.5
80
30
4.2
440
90
0.2
791
787
1.2
1.1
5
500
0.25
95
60
807
807
10
1.4
1.25
2
0
8
3.9
650
5
3
1.5
150
20
4.1
Max
1
1
Units
μA
mA
mΩ
mΩ
μA
A
kHz
f
SW
%
ns
MHz
mV
nA
V
V
μA
μA
μs
V
mV
V
%
ms
°C
°C
1
580
T
A
=25°C
-40°C<T
A
<85°C
(7)
V
FB
=820mV
2
823
827
50
1.6
1.4
Notes:
6) Guaranteed by design.
7) Not tested in production and guaranteed by over temperature correlation.
MP1495 Rev. 1.04
12/26/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
3
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