Datasheet
LTC3703
3
3703fc
elecTrical characTerisTics
The l 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
= 10V, V
MODE/SYNC
= V
INV
= V
SW
=
BGRTN = 0V, RUN/SS = I
MAX
= open, R
SET
= 25k, unless otherwise specified.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
, DRV
CC
V
CC
, DRV
CC
Supply Voltage
l
9.3 15 V
V
IN
V
IN
Pin Voltage
l
100 V
I
CC
V
CC
Supply Current V
FB
= 0V
RUN/SS = 0V
l
1.7
50
2.5 mA
µA
I
DRVCC
DRV
CC
Supply Current (Note 5)
RUN/SS = 0V
0
0
5
5
µA
µA
I
BOOST
BOOST Supply Current (Note 5) T
J
≤ 125°C
T
J
> 125°C
RUN/SS = 0V
l
l
360
360
0
500
800
5
µA
µA
µA
Main Control Loop
V
FB
Feedback Voltage (Note 4)
l
0.792
0.788
0.800 0.808
0.812
V
V
∆V
FB(LINE)
Feedback Voltage Line Regulation 9V < V
CC
< 15V (Note 4)
l
0.007 0.05 %/V
∆V
FB(LOAD)
Feedback Voltage Load Regulation 1V < V
COMP
< 2V (Note 4)
l
0.01 0.1 %
V
MODE/SYNC
MODE/SYNC Threshold MODE/SYNC Rising 0.75 0.81 0.87 V
∆V
MODE/SYNC
MODE/SYNC Hysteresis 20 mV
I
MODE/SYNC
MODE/SYNC Current 0 ≤ V
MODE/SYNC
≤ 15V 0 1 µA
V
INV
Invert Threshold 1 1.5 2 V
I
INV
Invert Current 0 ≤ V
INV
≤ 15V 0 1 µA
I
VIN
V
IN
Sense Input Current V
IN
= 100V
RUN/SS = 0V, V
IN
= 10V
100
0
140
1
µA
µA
I
MAX
I
MAX
Source Current V
IMAX
= 0V 10.5 12 13.5 µA
V
OS(IMAX)
V
IMAX
Offset Voltage |V
SW
| – V
IMAX
at I
RUN/SS
= 0µA
H Grade
–25
–25
10
10
55
65
mV
mV
V
RUN/SS
Shutdown Threshold 0.7 0.9 1.2 V
I
RUN/SS
RUN/SS Source Current RUN/SS = 0V 2.5 4 5.5 µA
Maximum RUN/SS Sink Current |V
SW
| – V
IMAX
≥ 200mV, V
RUN/SS
= 3V 9 17 25 µA
V
UV
Undervoltage Lockout V
CC
Rising
V
CC
Falling
l
l
8.0
5.7
8.7
6.2
9.3
6.8
V
V
Oscillator
f
OSC
Oscillator Frequency R
SET
= 25k 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 1.5 2 A
R
BG(SINK)
BG Driver Pull-Down R
DS(ON)
(Note 8) 1 1.5 Ω
I
TG(PEAK)
TG Driver Peak Source Current 1.5 2 A
R
TG(SINK)
TG Driver Pull-Down R
DS(ON)
(Note 8) 1 1.5 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 µA
I
COMP
COMP Sink/Source Current ±5 ±10 mA