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Document Number: 70189
S-40807-Rev. J, 26-Apr-04
Vishay Siliconix
Si786
Product is End of Life 3/2014
Notes:
a. Device Mounted with all leads soldered or welded to PC board.
b. Derate 9.52 mW/癈 above 70 癈.
Exposure to Absolute Maximum rating conditions for extended periods may affect device reliability. Stresses above Absolute Maximum rating may cause permanent
damage. Functional operation at conditions other than the operating conditions specified is not implied. Only one Absolute Maximum rating should be applied at any
one time.
ABSOLUTE MAXIMUM RATINGS
Parameter
Limit
Unit
V+ to GND
- 0.3 V to 36 V
V
PGND to GND
?2
V
L
to GND
- 0.3 V to 7 V
BST
3
, BST
5
 to GND
- 0.3 V to 36 V
LX
3
 to BST
3
 
- 7 V to 0.3 V
LX
5
 to BST
5
 
- 7 V to 0.3 V
Inputs/Outputs to GND (D
1
, D
2
, SHDN
, ON
5
, REF, SS
5
, CS
5
, FB
5
, SYNC, CS
3
, FB
3
,
SS
3
, ON
3
)
- 0.3 V, (V
L
 + 0.3 V)
V
H
 to GND
- 0.3 V to 20 V
Q
1
, Q
2
 to GND
- 0.3 V, (V
H
 + 0.3 V)
DL
3
, DL
5
 to PGND
- 0.3 V, (V
L
 + 0.3 V)
DH
3
 to LX
3
- 0.3 V (BST
3
 + 0.3 )
DH
5
 to LX
5
 
- 0.3 V (BST
5
 + 0.3 )
REF, V
L
 Short to GND
Momentary
REF Current
20
mA
V
L
 Current
50
Continuous Power Dissipation (T
A
 = 70 癈)
a
28-Pin SSOP
b
762
mW
Operating Temperature Range:
(T
MIN
 to T
MAX
)
Si786CG/CRG/CSG (C-Grade)
0 to 70
癈
Si786LG/LRG/LSG (L-Grade)
- 10 to 90
Si786DG/DRG/DSG (D-Grade)
- 40 to 85
Lead Temperature (soldering, 10 sec)
300
SPECIFICATIONS
Parameter
Specific Test Conditions
V+ = 15 V, I
VL
 = I
REF
 = 0 mA, SHDN
 = ON
3
 = ON
5
 = 5 V
Other Digital Input Levels 0 V or 5 V, T
A
 = T
MIN
 to T
MAX
Limits
e
Unit
 Min
a
   Typ
b
Max
a
3.3 V and 5 V Step-Down Controllers
Input Supply Range
5.5
30
V
FB
5
 Output Voltage
0 mV < (CS
5
- FB
5
) < 70 mV, 6 V < V + < 30 V
(includes load and line regulation)
4.80   5.08   5.20
FB
3
 Output Voltage
0 mV < (CS
3
- FB
3
) < 70 mV
6 V < V + < 30 V
(includes load and line regulation)
Si786CG/LG/DG   3.17   3.35   3.46
Si786CRG/LRG/DRG  3.32   3.50   3.60
Si786CSG/LSG/DSG  3.46   3.65   3.75
Load Regulation
Either Controller (CS_ to FB_ = 0 to 70 mV)
2.5
%
Line Regulation
Either Controller (V+ = 6 V to 30 V)
0.03
%/V
Current-Limit Voltage
CS
3
 - FB
3
 or CS
5
 - FB
5
80   100   120
mV
Si786DG/DRG/DSG   77   100   120
SS
3
/SS
5
 Source Current
2.5   4.0   6.5
礎
Si786DG/DRG/DSG   2.3   4.0   6.5
SS
3
/SS
5
 Fault Sink Current
2
mA
Internal Regulator and Reference
V
L
 Output Voltage
ON
5
 = ON
3
 = 0 V, 5.5 V < V+ < 30 V
0 mA < I
L
 < 25 mA
4.5
5.5
V
V
L
 Fault Lockout Voltage
Falling Edge, Hysteresis = 1 %
3.6
4.2
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