SI9108 Datasheet, PDF (3/5 Pages) Vishay Siliconix – 1-W High-Voltage Switchmode Regulator

New Product
SPECIFICATIONS^a
Parameter
PWM
Maximum Duty Cycle
Dead Time
Minimum Duty Cycle
Minimum Pulse Width Before
Pulse Drops Out
Current Limit
Threshold Voltage
Delay to Output^e
Input Voltage
Input Leakage Current
Pre-Regulator Start-Up
Current
V_CC Pre-Regulator
Turn-Off Threshold Voltage
Undervoltage Lockout
V_REG - V_UVLO
Supply
Supply Current
Bias Current
SHUTDOWN Delay
SHUTDOWN Pulse Width
RESET Pulse Width
Latching Pulse Width
SHUTDOWN and RESET
Low
Input Low Voltage
Input High Voltage
Input Current
Input Voltage High
Input Current
Input Voltage Low
Symbol
D_MAX
D_MIN
V_SOURCE
t_d
+V_IN
+I_IN
I_START
V_REG
V_UVLO
V_DELTA
I_CC
I_BIAS
t_SD
t_SW
t_RW
t_LW
V_IL
V_IH
I_IH
I_IL
Test Conditions
Unless Otherwise Specified
DISCHARGE = -V_IN = 0 V
V_CC = 10 V, +V_IN = 48 V
R_BIAS = 820 kΩ , R_OSC = 910 kΩ
R_L = 100 Ω from DRAIN to V_CC
V_FB = 0 V
R_L = 100 Ω from DRAIN to V_CC
V_SOURCE = 1.5 V, See Figure 1
I_IN = 10 µA
V_CC ≥ 10 V
Pulse Width ≤ 300 µs, V_CC = 7 V
I_{PRE-REGULATOR} = 10 µA
R_L = 100 Ω from DRAIN to V_CC
See Detailed Description
V_SOURCE = -V_IN, See Figure 2
See Figure 3
V_IN = 10 V
V_IN = 0 V
Si9108
Vishay Siliconix
Limits
D-Suffix, -40°C to 85°C
Temp^b Min^c Typ^d Max^c
Unit
Room
99.0 99.6
99.9
%
Room
100
ns
Room
0
%
Room
110
175
ns
Room
0.8
1.0
1.2
V
Room
200
300
ns
Room
120
Room
V
10
µA
Room
8
15
mA
Room
7.5
9.3
9.7
Room
7.0
8.7
9.2
V
Room
0.25
0.5
Room
0.35
0.5
mA
Room
7.5
µA
Room
50
100
Room
50
Room
50
ns
Room
25
Room
Room
8.0
2.0
V
Room
1
5
µA
Room
-35
-25
FaxBack 408-970-5600, request 70883
www.siliconix.com
S-62188—Rev. A, 05-Apr-99
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