LTC3703-5
3
37035fa
Note 1
: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2
: The LTC3703-5 is guaranteed to meet performance specifications
from 0
°
C to 70
°
C. Specifications over the –40
°
C to 85
°
C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3703I-5 is guaranteed over the full
–40
°
C to 125
°
C operating junction temperature range.
Note 3:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formula:
LTC3703-5: T
J
= T
A
+ (P
D
• 100
°
C/W) G Package
Note 4
: The LTC3703-5 is tested in a feedback loop that servos V
FB
to the
ELECTRICAL CHARACTERISTICS
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25
°
C. V
CC
= DRV
CC
= V
BOOST
= V
IN
= 5V, V
MODE/SYNC
= V
INV
= V
SW
=
BGRTN = 0V, RUN/SS = I
MAX
= open, R
SET
= 25k, unless otherwise specified.
reference voltage with the COMP pin forced to a voltage between 1V and 2V.
Note 5:
The dynamic input supply current is higher due to the power
MOSFET gate charging being delivered at the switching frequency
(Q
G
• f
OSC
).
Note 6
: Guaranteed by design. Not subject to test.
Note 7
: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125
°
C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 8
: R
DS(ON)
guaranteed by correlation to wafer level measurement.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Main Control Loop
V
FB
Feedback Voltage
(Note 4)
0.792
0.800
0.808
V
●
0.788
0.812
V
∆
V
FB, LINE
Feedback Voltage Line Regulation
5V < V
CC
< 15V (Note 4)
●
0.007
0.05
%/V
∆
V
FB, LOAD
Feedback Voltage Load Regulation
1V < V
COMP
< 2V (Note 4)
●
0.01
0.1
%
V
MODE/SYNC
MODE/SYNC Threshold
MODE/SYNC Rising
0.75
0.8
0.87
V
∆
V
MODE/SYNC
MODE/SYNC Hysteresis
20
mV
I
MODE/SYNC
MODE/SYNC Current
0
≤
V
MODE/SYNC
≤
15V
0
1
µ
A
V
INV
Invert Threshold
1
1.5
2
V
I
INV
Invert Current
0
≤
V
INV
≤
15V
0
1
µ
A
I
VIN
V
IN
Sense Input Current
V
IN
= 60V
80
130
µ
A
RUN/SS = 0V, V
IN
= 10V
0
1
µ
A
I
MAX
I
MAX
Source Current
V
IMAX
= 0V
10.5
12
13.5
µ
A
V
OS,
IMAX
V
IMAX
Offset Voltage
|V
SW
| – V
IMAX
at I
RUN/SS
= 0
µ
A
– 25
10
55
mV
V
RUN/SS
Shutdown Threshold
0.7
0.9
1.2
V
I
RUN/SS
RUN/SS Source Current
RUN/SS = 0V
2.3
3.8
5.3
µ
A
Maximum RUN/SS Sink Current
|V
SW
| – V
IMAX
> 100mV
9
17
25
µ
A
V
UV
Undervoltage Lockout
V
CC
Rising
●
3.4
3.7
4.1
V
V
CC
Falling
●
2.8
3.1
3.4
V
Hysteresis
●
0.45
0.65
0.85
V
Oscillator
f
OSC
Oscillator Frequency
R
SET
= 25k
Ω
270
300
330
kHz
f
SYNC
External Sync Frequency Range
100
600
kHz
t
ON, MIN
Minimum On-Time
200
ns
DC
MAX
Maximum Duty Cycle
f < 200kHz
89
93
96
%
Driver
I
BG, PEAK
BG Driver Peak Source Current
0.75
1
A
R
BG, SINK
BG Driver Pull-Down R
DS, ON
(Note 8)
1.2
1.8
Ω
I
TG, PEAK
TG Driver Peak Source Current
0.75
1
A
R
TG, SINK
TG Driver Pull-Down R
DS, ON
(Note 8)
1.2
1.8
Ω
Feedback Amplifier
A
VOL
Op Amp DC Open Loop Gain
(Note 4)
74
85
dB
f
U
Op Amp Unity Gain Crossover Frequency (Note 6)
25
MHz
I
FB
FB Input Current
0
≤
V
FB
≤
3V
0
1
µ
A
I
COMP
COMP Sink/Source Current
±
5
±
10
mA
