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參數(shù)資料
| 型號： | Si786 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | Dual-Output Power-Supply Controller(用于便攜電腦電源轉換的雙輸出步降轉換器) |
| 中文描述： | 雙輸出電源控制器（用于便攜電腦電源轉換的雙輸出步降轉換器） |
| 文件頁數(shù)： | 2/13頁 |
| 文件大小： | 497K |
| 代理商： | SI786 |
Si786
Vishay Siliconix
S-60752—Rev. G, 05-Apr-99
2
FaxBack 408-970-5600, request 70189
www.siliconix.com
ABSOLUTE MAXIMUM RATINGS
V+ to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3 V to 36 V
PGND to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±2 V
V
L
to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7 V
BST
3
, BST
5
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V 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 mA
Continuous Power Dissipation (T
= 70°C)
a
28-Pin SSOP
b
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 762 mW
Operating Temperature Range:
Si786CG/CRG/CSG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 70°C
Si786LG/LRG/LSG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -10° to 90°C
Lead Temperature (soldering, 10 sec) . . . . . . . . . . . . . . . . . . . .300°C
Notes
a. Device mounted with all leads soldered or welded to PC board.
b. Derate 9.52 mW/°C above 70°C.
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.
SPECIFICATIONS
Parameter
Test Conditions Unless Specified
V+ = 15 V, I
= I
= 0 mA, SHDN = ON
3
= ON
= 5 V
Other Digital Input Levels 0 V or 5 V, T
A
= T
MIN
to T
MAX
Limits
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
-FB
) < 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
-FB
) < 70 mV
6 V < V + < 30 V
(includes load and line regulation)
Si786CG
3.17
3.35
3.46
Si786CRG
3.32
3.50
3.60
Si786CSG
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
SS
3
/SS
5
Source Current
SS
3
/SS
5
Fault Sink Current
Internal Regulator and Reference
2.5
4.0
6.5
μA
2
mA
V
L
Output Voltage
ON
5
= ON
= 0 V, 5.5 V < V+ < 30 V
0 mA < I
L
< 25 mA
Falling Edge, Hysteresis = 1%
4.5
5.5
V
V
L
Fault Lockout Voltage
V
L
/FB
5
Switchover Voltage
REF Output Voltage
3.6
4.2
Rising Edge of FB
5
, Hysteresis = 1%
No External Load
c
4.2
4.7
3.24
3.36
REF Fault Lockout Voltage
Falling Edge
0 mA < I
L
< 5 mA
d
2.4
3.2
REF Load Regulation
30
75
mV
V+ Shutdown Current
SHDN = D
1
= D
= ON
3
= ON
5
= 0 V
V+ = 30 V
25
40
μA
V+ Standby Current
D
1
= D
2
= ON
3
= ON
5
= 0 V, V+ = 30 V
D
1
= D
2
= 0 V, FB
5
= CS
= 5.25 V
FB
3
= CS
3
= 3.5 V
FB
5
= CS
5
= 5.25 V, V
L
Switched Over to FB
5
70
110
Quiescent Power Consumption
(both PWM controllers on)
5.5
8.6
mW
V+ Off Current
30
60
μA
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