SI4779CY Datasheet, PDF (3/8 Pages) Vishay Siliconix – High-Side N-Channel Switch with Current Limit

New Product
Si4779CY
Vishay Siliconix
SPECIFICATIONS
Test Conditions Unless Specified
Parameter
Symbol
T_A = 25_C, V_IN = 5 V
Min
Basic Operations
Operating Voltage
On-State Resistance
Supply Current
ON Input Low Voltage
ON Input High Voltage
ON Input Current
Protection
V_IN
2.7
r_DS(on)
V_IN = 4.75 V, I_D = 2 A
V_IN = 3.0 V, I_D = 2 A
I_SUP(off)
ON = IN, V_IN = 5.5 V, V_OUT = 0 V
I_SUP(on)
ON = GND, V_IN = V_OUT = 5.5 V, I_OUT = 0 A
V_ONL
V_IN = 2.7 to 5.5 V
V_ONH
V_IN = 2.7 to 3.6 V
2.0
V_IN = 4.5 to 5.5 V
2.4
I_ON
V_ON = 5.5 V
Over Current Limit Range^b
I_LIMIT
Tolerance = "20%, V_IN = 5 V
0.4
Under Voltage Lockout (falling edge)
UVLO
2.0
Under Voltage Hysteresis
FAULT Output Voltage Low^b
FAULT Logic Output Leakage Current
DUVLO
V_FAULT
I_FL
I_SINK = 100 mA
V_IN = V_FAULT = 5.5 V
Dynamic^b
Turn-On Time
Rise Time
Turn-Off Time
Fall Time
Cycle Time
t_on
V_IN = 5 V, R_L = 11 W, C_L = 40 mF
t_r
t_off
t_f
V_IN = 5 V, I_OUT = 500 mA
t_cyc
V_IN = 5 V, R_L = 0.5 W
Notes
a. Typical values at T_A = 25_C are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
b. Guaranteed by design. Derived from I_SET current ratio, current-limit amplifier and external set resistor accuracy.
Limits
Typ^a
0.035
0.045
0.01
2.3
0.1
0.01
3
3.5
1.5
0.5
8
Max
5.5
0.045
0.055
2
70
0.8
"1
2.4
2.6
0.4
1
Unit
V
W
mA
V
mA
A
V
mA
ms
ms
ms
TIMING DIAGRAMS
ON
50%
ON
50%
50%
OUT
50%
OUT
t_on
t_off
FIGURE 1.
Document Number: 71664
S-04276—Rev. A, 16-Jul-01
ON
OUT 10%
t_rise
ON
90%
90%
OUT
FIGURE 2.
10%
t_fall
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