LT3782 Linear Technology, LT3782 Datasheet - Page 3

• Manufacturer Part Number: LT3782
• Description: 2-Phase Step-Up DC/DC Controller
• Manufacturer: Linear Technology

temperature range, otherwise specifications are at T
outputs, unless otherwise noted.
SYMBOL
Current Amplifier CA1, CA2
Voltage Gain ∆V
Current Limit (V
Input Current (I
Oscillator
Switching Frequency
Synchronization Pulse Threshold on SYNC Pin
Synchronization Frequency Range
(Note: Operation Switching Frequency Equals
Half of the Synchronization Frequency)
V
Maximum Duty Cycle
Duty Cycle Limit
DCL Pin Input Current
Gate Driver
V
BGATE1, BGATE2 High Voltage
BGATE1, BGATE2 Source Current (Peak)
BGATE1, BGATE2 Low Voltage
BGATE1, BGATE2 Sink Current (Peak)
SGATE1, SGATE2 High Voltage
SGATE1, SGATE2 Low Voltage
SGATE1, SGATE2 Peak Current
Delay of BGATE High
Delay Pin Input Current
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT3782 is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 125°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
ELECTRICAL CHARACTERISTICS
RSET
GBIAS
SENSE1
C
SENSE1
/∆V
SENSE
PARAMETER
+
+
, I
– V
SENSE1
SENSE1
–
, I
–
SENSE2
) (V
SENSE2
+
, I
SENSE2
+
– V
SENSE2
–
)
–
)
A
= 25°C. V
CONDITIONS
∆V
R
R
R
Rising Edge V
R
R
R
R
V
R
V
I
13V ≤ V
V
Capacitive Load >22µF
Capacitive Load >50µF
8V ≤ V
Capacitive Load >22µF
Capacitive Load >50µF
8V ≤ V
8V ≤ V
500pF Load
DELAY Pin and R
V
V
V
V
GBIAS
FB
DCL
CC
DELAY
DELAY
DELAY
DELAY
SET
SET
SET
SET
SET
SET
SET
SET
SENSE
The
= V
= 8V, I
= 130k
= 80k
= 40k
= 130k
= 80k
= 40k
= 80k
= 80k , V
= 0.3V
< 70mA
CC
CC
CC
REF
= 1V
= 0.5V
= 0.25V
= 0.25V
CC
●
CC
= 0V
≤ 24V, I
≤ 24V, I
≤ 24V, I
BGATE
denotes the specifications which apply over the full operating
≤ 24V, I
– 25mV, R
= 13V, R
V
V
SYNC
DCL
DCL
DCL
Note 3: 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.
= –100mA
SET
BGATE
SGATE
SGATE
≤ 0.3V
= 1.2V
= V
BGATE
R
Pin Shorted
RSET
SET
SET
SET
= 100mA
= –20mA
= 20mA
= –100mA
> 80K
= 40K
= 80k, operating maximum V
●
●
●
●
●
●
●
●
●
●
●
●
MIN
10.2
130
212
180
290
386
0.8
550
7.8
3.8
4.5
50
90
83
Max Duty Cycle
CC
= 24V, no load on any
–0.1
–0.1
TYP
154
250
100
100
150
250
500
465
1.2
2.3
9.2
0.5
5.5
0.5
62
60
94
90
50
75
11
4
5
3
4
3
4
LT3782
MAX
–0.3
11.7
10.5
–0.3
177
288
533
240
392
715
0.7
6.7
0.7
80
2
UNITS
3782fa
3
kHz
kHz
kHz
kHz
kHz
kHz
mV
mA
µA
µA
µA
ns
ns
ns
ns
%
%
%
%
V
V
V
V
V
A
A
V
A
A
V
V