SI4779CY Datasheet, PDF (6/8 Pages) Vishay Siliconix – High-Side N-Channel Switch with Current Limit

Si4779CY
Vishay Siliconix
New Product
TYPICAL WAVEFORMS (V_IN = 5 V, T_A = 25_ UNLESS OTHERWISE NOTED)
2 ms/div
CH1: ON, 5 V/div
CH2: V_OUT, 5 V/div, R_L = 0.5 W, C_L = 47 mF
CH3: FAULT, 5 V/div
CH4: I_OUT, 1 A/div
FIGURE 8. FAULT to Short Response (t_cyc)
2 ms/div
CH1: ON, 5 V/div
CH2: V_RESET, 500 mV/div
CH3: V_OUT, 5 V/div, R_L = 5.6 W, C_L = 100 mF
CH4: I_OUT, 1 A/div
FIGURE 9. V_RESET to Over Current Response
2 ms/div
CH1: ON, 5 V/div
CH2: PS Droops, 50 mV/div, Offset = 5 V
CH3: V_OUT, 1 V/div, R_L = 0.5 W, C_L = 100 mF
CH4: I_OUT, 0.5 A/div
NOTE: Special test with 820-mF capacitor at PS and R_SET
setup for 0.5 A.
FIGURE 10. Power Supply Droops vs. Short
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2 ms/div
CH1: ON, 5 V/div
CH2: PS Droops, 100 mV/div, Offset = 5 V
CH3: V_OUT, 1 V/div, R_L = 0.5 W, C_L = 100 mF
CH4: I_OUT, 2 A/div
NOTE: Special test with 820-mF capacitor at PS and R_SET
setup for 2.4 A.
FIGURE 11. Power Supply Droops vs. Short
Document Number: 71664
S-04276—Rev. A, 16-Jul-01