Si9139 Datasheet, PDF (7/17 Pages) Vishay Siliconix – Multi-Output, Individual On/Off Control Power-Supply Controller

TYPICAL WAVEFORMS
New Product
Si9139
Vishay Siliconix
PSM Operation B Converter
V(V_IN = 5.0 V, V_OUT = 2.5 V)
V_OUT
(20 mV/div)
(I_OUT = 100 mA)
10.0 ms/div
PWM Loading B Converter
(V_IN = 12.0 V, V_OUT = 2.5 V)
(1.5 A to 4.0 A )
50 ms/div
PSM to PWM A Converter
VV_IN = 5.0 V, V_OUT = 2.0 V
Inductor Node
(LXB)
(5 V/div)
Inductor Current
(0.5 A/div)
V_OUT
(20 mV/div)
Load
(1 A/div)
V_OUT
(50 mV/div)
PSM Operation B Converter
(V_IN = 5.0 V, V_OUT = 2.5 V)
(I_OUT = 1.2 A)
10.0 ms/div
PWM Unloading A Converter
(V_IN = 12.0 V, V_OUT = 2.0 V)
V_OUT
(20 mV/div)
Inductor Node
(LXB)
(5 V/div)
Inductor Current
(0.5 A/div)
V_OUT
(20 mV/div)
(1.8 A to 4.3 A )
50 ms/div
PWM to PSM A Converter
(V_IN = 10.0 V, V_OUT = 3.3 V)
Load
(1 A/div)
V_OUT
(50 mV/div)
(0.1 A to 3.0 A )
50 ms/div
Document Number: 71841
S-22317—Rev. A, 16-Dec-02
Load
(1 A/div)
(3 A to 0.1 A )
50 ms/div
Load
(1 A/div)
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