Si9139 Datasheet, PDF (6/17 Pages) Vishay Siliconix – Multi-Output, Individual On/Off Control Power-Supply Controller

Si9139
Vishay Siliconix
New Product
TYPICAL CHARACTERISTICS (25_C UNLESS NOTED)
Efficiency vs. Auxiliary SMPS C Output Current
(Buck Configuration)
90
V_IN = 5 V
75
60
V_IN = 12 V
45
V_IN = 24 V
30
SMPS A, B No Load
V_OUT = 2.1 V
15
Efficiency vs. SMPS B Output Current
100
80
V_IN = 5 V
V_IN = 12 V
60
40
SMPS A No Load
V_OUT = 12.5 V
20
0
0.01
0.1
1
10
Output Current (A)
TYPICAL WAVEFORMS
PWM Loading B Converter
(V_IN = 5.0 V, V_OUT = 2.5 V)
V_OUT
(100 mV/div)
0
0.01
0.1
1
Load Current (A)
PWM Unloading B Converter
(V_IN = 5.0 V, V_OUT = 2.5 V)
V_OUT
(100 mV/div)
Load
(1 A/div)
20.0 ms/div
PSM to PWM B Converter
(V_IN = 5.0 V, V_OUT = 2.5 V)
V_OUT
(50 mV/div)
Load
(1 A/div)
20.0 ms/div
PWM to PSM B Converter
(V_IN = 5.0 V, V_OUT = 2.5 V)
V_OUT
(50 mV/div)
(0.1 A to 1.8 A)
50 ms/div
www.vishay.com
6
Load
(1 A/div)
(0.1 A to 1.8 A)
50 ms/div
Load
(1 A/div)
Document Number: 71841
S-22317—Rev. A, 16-Dec-02