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LT3782AIUFD Datasheet(PDF) 3 Page - Linear Technology

Part # LT3782AIUFD
Description  2-Phase Step-Up DC/DC Controller
PDF  20 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT3782AIUFD Datasheet(HTML) 3 Page - Linear Technology

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LT3782A
3
3782af
The
● denotes the specifications which apply over the full operating junction
temperature range, otherwise specifications are at TA = 25°C. VCC = 13V, RSET = 80k, no load on any outputs, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Overall
Supply Voltage (VCC)
l
640
V
Supply Current (IVCC)VC ≤ 0.5V (Switching Off), VCC ≤ 40V
11
16
mA
Shutdown
RUN Threshold
l
2.3
2.45
2.6
V
RUN Threshold Hysteresis
80
mV
Supply Current in Shutdown
1V ≤ RUN ≤ VREF, VCC ≤ 30V
RUN ≤ 0.3V, VCC ≤ 30V
0.4
40
0.65
90
mA
μA
RUN Pin Input Current
VRUN = 2.3V
l
–0.5
–2
μA
Voltage Amplifier gm
Reference Voltage (VREF)
l
2.42
2.4
2.44
2.464
2.488
V
V
Transconductance
VVC = 1V, ΔIVC = ±2μA
l
200
260
370
μmho
Input Current IFB
VFB = VREF
l
0.2
0.6
μA
VC High
IVC = 0
1.5
V
VC Low
IVC = 0
0.35
0.4
V
Source Current IVC
VVC = 0.7V – 1V, VFB = VREF – 100mV
8
11
14
μA
Sink Current IVC
VVC = 0.7V – 1V, VFB = VREF + 100mV
13
20
28
μA
VC Threshold for Switching Off (BGATE1, BGATE2 Low)
l
0.3
V
Soft-Start Current ISS
VSS = 0.1V – 2.8V
6
10
15
μA
Current Amplifier CA1, CA2
Voltage Gain ΔVC/ΔVSENSE
4
Current Limit (VSENSE1+ – VSENSE1–) (VSENSE2+ – VSENSE2–)VFB = 2.3V
55
63
70
mV
Current Limit Mismatch
(ΔVSENSE1 – ΔVSENSE2), VFB = 2.3V
–10
10
mV
Input Current (ISENSE1+, ISENSE1–, ISENSE2+, ISENSE2–)ΔVSENSE = 0V
60
μA
Oscillator
Switching Frequency
RSET = 130k
RSET = 80k
RSET = 40k
l
l
l
130
212
386
154
250
465
177
288
533
kHz
kHz
kHz
Synchronization Pulse Threshold on SYNC Pin
Rising Edge VSYNC
0.8
1.2
2
V
Synchronization Frequency Range
(Note: Operation Switching Frequency Equals
Half of the Synchronization Frequency)
RSET = 130k
RSET = 80k
RSET = 40k
180
290
550
240
392
715
kHz
kHz
kHz
VRSET
RSET = 80k
2.3
V
Maximum Duty Cycle
VFB = VREF – 25mV, RSET > 80k
RSET = 40k
l
l
90
83
94
90
%
%
Duty Cycle Limit
RSET = 80k, VDCL ≤ 0.3V
VDCL = 1.2V
VDCL = VRSET
50
75
Max Duty Cycle
%
%
DCL Pin Input Current
VDCL ≤ 0.3V
l
–0.1
–0.3
μA
ELECTRICAL CHARACTERISTICS



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