LTC3703 Linear Technology, LTC3703 Datasheet - Page 3

• Manufacturer Part Number: LTC3703
• Description: 100V Synchronous Switching Regulator Controller
• Manufacturer: Linear Technology

SYMBOL
Main Control Loop
V
V
I
V
I
I
I
V
V
I
V
Oscillator
f
f
t
DC
Driver
I
R
I
R
Feedback Amplifier
A
f
I
I
Note 1: Absolute Maximum Ratings are those values beyond which the life of
a device may be impaired.
Note 2: The LTC3703E 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.
Note 3: T
dissipation P
Note 4: The LTC3703 is tested in a feedback loop that servos V
reference voltage with the COMP pin forced to a voltage between 1V and 2V.
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
BGRTN = 0V, RUN/SS = I
MODE/SYNC
INV
VIN
MAX
RUN/SS
OSC
SYNC
ON, MIN
BG, PEAK
TG, PEAK
U
FB
COMP
FB
MODE/SYNC
INV
OS, IMAX
RUN/SS
UV
VOL
V
V
V
BG, SINK
TG, SINK
FB, LINE
FB, LOAD
MODE/SYNC
MAX
LTC3703: T
J
is calculated from the ambient temperature T
D
according to the following formula:
J
= T
A
PARAMETER
Feedback Voltage
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
MODE/SYNC Threshold
MODE/SYNC Hysteresis
MODE/SYNC Current
Invert Threshold
Invert Current
V
I
V
Shutdown Threshold
RUN/SS Source Current
Maximum RUN/SS Sink Current
Undervoltage Lockout
Oscillator Frequency
External Sync Frequency Range
Minimum On-Time
Maximum Duty Cycle
BG Driver Peak Source Current
BG Driver Pull-Down R
TG Driver Peak Source Current
TG Driver Pull-Down R
Op Amp DC Open Loop Gain
Op Amp Unity Gain Crossover Frequency (Note 6)
FB Input Current
COMP Sink/Source Current
+ (P
MAX
IN
IMAX
Sense Input Current
D
Source Current
• 100 C/W) G Package
Offset Voltage
MAX
= open, R
DS, ON
SET
DS, ON
= 25k, unless otherwise specified.
A
and power
A
= 25 C. V
FB
CONDITIONS
(Note 4)
9V < V
1V < V
MODE/SYNC Rising
0 V
0 V
V
RUN/SS = 0V, V
V
|V
RUN/SS = 0V
|V
V
V
R
f < 200kHz
(Note 8)
(Note 8)
(Note 4)
0 V
to the
IN
IMAX
CC
CC
SET
SW
SW
The
= 100V
Rising
Falling
| – V
| – V
MODE/SYNC
INV
= 25k
FB
= 0V
CC
COMP
CC
< 15V (Note 4)
IMAX
IMAX
3V
denotes the specifications which apply over the full operating
15V
= DRV
< 2V (Note 4)
at I
> 100mV
Note 5: The dynamic input supply current is higher due to the power
MOSFET gate charging being delivered at the switching frequency
(Q
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
IN
G
RUN/SS
15V
= 10V
CC
• f
OSC
= V
DS(ON)
= 0 A
).
BOOST
guaranteed by correlation to wafer level measurement.
= V
IN
= 10V, V
MODE/SYNC
0.792
0.788
10.5
MIN
– 25
0.75
270
100
2.5
8.0
5.7
1.5
1.5
0.7
89
74
9
1
5
= V
0.800
0.007
0.01
TYP
100
300
200
0.8
1.5
0.9
8.7
6.2
10
20
17
93
85
25
12
0
0
4
2
1
2
1
0
10
INV
0
LTC3703
= V
SW
0.808
0.812
MAX
0.05
0.87
13.5
140
330
600
0.1
1.2
5.5
9.3
6.8
1.5
1.5
55
25
96
1
2
1
1
1
=
UNITS
3
MHz
3703f
%/V
kHz
kHz
mV
mV
mA
dB
ns
%
%
V
V
V
A
V
A
A
A
A
V
A
A
V
V
A
A
A