SI786 Datasheet, PDF (2/14 Pages) Vishay Siliconix – Dual-Output Power-Supply Controller

Si786
Vishay Siliconix
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
BST₃, BST₅ to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 36 V
LX₃ to BST₃ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -7 V to 0.3 V
LX₅ to BST₅ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -7 V to 0.3 V
Inputs/Outputs to GND
(D₁, D₂, SHDN, ON₅, REF, SS₅, CS₅. FB₅, SYNC, CS₃, FB₃,
SS₃, ON₃₎) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V, (V_L + 0.3 V)
V_H to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to 20 V
Q₁, Q₂ to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V, (V_H + 0.3 V)
DL₃, DL₅ to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V, (V_L + 0.3 V)
DH₃ to LX₃ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V (BST₃ + 0.3 )
DH₅ to LX₅ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V (BST₅ + 0.3 )
REF, V_L Short to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Momentary
REF Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
V_L Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
Continuous Power Dissipation (T_A = 70_C)a
28-Pin SSOP^b . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 762 mW
Operating Temperature Range: (T_MIN to T_MAX)
Si786CG/CRG/CSG (C-Grade) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 70_C
Si786LG/LRG/LSG (L-Grade) . . . . . . . . . . . . . . . . . . . . . . . . . . . −10_ to 90_C
Si786DG/DRG/DSG (D-Grade) . . . . . . . . . . . . . . . . . . . . . . . . . −40_ to 85_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
Specific Test Conditions
Parameter
V+ = 15 V, I_VL = I_REF = 0 mA, SHDN = ON₃ = ON₅ = 5 V
Other Digital Input Levels 0 V or 5 V, T_A = T_MIN to T_MAX
3.3-V and 5-V Step-Down Controllers
Input Supply Range
FB₅ Output Voltage
FB₃ Output Voltage
Load Regulation
Line Regulation
0 mV < (CS₅-FB₅) < 70 mV, 6 V < V + < 30 V
(includes load and line regulation)
0 mV < (CS₃-FB₃) < 70 mV
6 V < V + < 30 V
(includes load and line regulation)
Si786CG/LG/DG
Si786CRG/LRG/DRG
Si786CSG/LSG/DSG
Either Controller (CS_ to FB_ = 0 to 70 mV)
Either Controller (V+ = 6 V to 30 V)
Current-Limit Voltage
CS₃-FB₃ or CS₅-FB₅
Si786DG/DRG/DSG
SS₃/SS₅ Source Current
SS₃/SS₅ Fault Sink Current
Internal Regulator and Reference
Si786DG/DRG/DSG
V_L Output Voltage
V_L Fault Lockout Voltage
V_L/FB₅ Switchover Voltage
REF Output Voltage
REF Fault Lockout Voltage
REF Load Regulation
V+ Shutdown Current
ON₅ = ON₃ = 0 V, 5.5 V < V+ < 30 V
0 mA < I_L < 25 mA
Falling Edge, Hysteresis = 1%
Rising Edge of FB₅, Hysteresis = 1%
No External Load^c
Falling Edge
0 mA < I_L < 5 mA^d
SHDN = D₁ = D₂ = ON₃ = ON₅ = 0 V
V+ = 30 V
V+ Standby Current
Quiescent Power Consumption
(both PWM controllers on)
V+ Off Current
D₁ = D₂ = ON₃ = ON₅ = 0 V, V+ =
30 V
Si786DG/DRG/DSG
D₁ = D₂ = 0 V, FB₅ = CS₅ =
5.25 V
FB₃ = CS₃ = 3.5 V
Si786DG/DRG/DSG
FB₅ = CS₅ = 5.25 V, V_L Switched Over to FB₅
www.vishay.com
2
Min^a
Limits^e
Typ^b
Max^a Unit
5.5
30
4.80
5.08
5.20
3.17
3.35
3.46
V
3.32
3.50
3.60
3.46
3.65
3.75
2.5
%
0.03
%/V
80
100
120
mV
77
100
120
2.5
4.0
6.5
mA
2.3
4.0
6.5
2
mA
4.5
5.5
3.6
4.2
4.2
4.7
V
3.24
3.36
2.4
3.2
30
75
mV
25
40
70
110
mA
70
115
5.5
8.6
mW
5.5
9.0
30
60
mA
Document Number: 70189
S-40807—Rev. J, 26-Apr-04