MP1496 – SYNCHRONOUS, STEP-DOWN CONVERTER WITH INTERNAL MOSFETS
ELECTRICAL CHARACTERISTICS
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
V
IN
Under-Voltage Lockout
Threshold-Rising
V
IN
Under Voltage Lockout
Threshold-Hysteresis
VCC Regulator
VCC Load Regulation
Soft-Start Current
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
τ
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
I
SS
3.7
V
EN
=2V
V
EN
=0
Condition
V
EN
= 0V
V
EN
= 2V, V
FB
= 1V
V
BST-SW
=5V
V
CC
=5V
V
EN
= 0V, V
SW
=12V
Under 40% Duty Cycle
V
FB
=750mV
V
FB
<400mV
V
FB
=700mV
Min
Typ
0.7
100
40
3
440
90
0.2
791
787
1.2
1.1
Max
1
1
Units
μA
mA
mΩ
mΩ
μA
A
kHz
f
SW
%
ns
MHz
mV
nA
V
V
μA
μA
μs
4.1
V
mV
V
%
μA
°C
°C
1
500
0.25
95
60
807
807
10
1.4
1.25
2
0
8
3.9
650
5
3
11
150
20
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.
MP1496 Rev. 1.05
12/26/2012
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© 2012 MPS. All Rights Reserved.
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