SI91860 Datasheet, PDF (6/8 Pages) Vishay Siliconix – 400-mA Smart Regulator for Network Interface Card

Si91860
Vishay Siliconix
TYPICAL WAVEFORMS
5 V_IN Power Down (3.3 V_AUX = 3.3 V)
3.3
V20_A0_UXmV/div (offset = 3.3 V)
3.3 V_OUT (100 mV/div)
3.3 V_AUX
200 mV/div (offset = 3.3 V)
5 V_IN Power Up (3.3 V_AUX = 3.3 V)
3.3 V_OUT (100 mV/div)
5 V_IN
500 mV/div (offset = 4.2 V)
5 V_SB = 0 V
3.3 V_AUX = 3.3 V
I_OUT = 400 mA
5 V_IN
500 mV/div (offset = 4.3 V)
M 5.00 ms
5 V_SB = 0 V
3.3 V_AUX = 3.3 V
I_OUT = 400 mA
M 5.00 ms
5 V_IN (2 V/div)
Line Transient −1 (5 V_IN and 5 V_SB)
Line Transient −2 (5 V_IN and 5 V_SB)
5 V_IN (1 V/div)
3.3 V_OUT (10 mV/div)
3.3 V_OUT (10 mV/div)
5 V_IN = 4.5 to 5.5 V
I_OUT = 150 mA
T_RISE = 5 µsec
M 5.00 ms
5 V_IN = 5.5 to 4.5 V
I_OUT = 150 mA
T_TALL = 5 µsec
M 5.00 ms
0
−10
−20
−30
−40
−50
PSRR(dB)
−60
−70
−80
1
www.vishay.com
6
Power Supply Ripple Rejection vs. Frequency
5 V_IN = 5.0 V)
I_LOAD = 150 mA
PSRR
10
100
1K
10 K
100 K
1M
Frequency (Hz)
Document Number: 71340
S-40704—Rev. B, 19-Apr-04