ISL6186_14 Datasheet, PDF (12/18 Pages) Intersil Corporation – USB Port Power Supply Controller

ISL6186
Typical Performance Curves (Continued)
EN
V_OUT
EN
V_OUT
I_IN
FIGURE 23. V_IN = 2.4V TURN-ON INTO 0.88Ω
Test Circuits
+V -
10k
FLT
5V
VIN
OUT
OUTPUT
ISL6186
10µF
EN
10
I_IN = 3.8A
R_l =1.3W, C_l = 200µF
3.6A VARIANT
FIGURE 24. TURN-ON INTO TO 18WLOAD
10k
FLT
OUTPUT
5V
VIN
OUT
R_L sized
ISL6186
10µF
for desired
EN
OC level
10
R_L
r_DS(ON) = V/(V_OUT/10Ω)
FIGURE 25A. r_DS(ON)
FIGURE 25. DC TEST CIRCUIT
FIGURE 25B. CURRENT LIMITING
5V
0-V_IN
10k
FLT
VIN
OUT
ISL6186
EN
10µF
OUTPUT
10
EN
0.5VIN
OUTPUT
t_ON
90%
VIN
0.5VIN
0V
t_OFF
10%
VIN
GND
OUTPUT
90%
10%
t_R
90%
10%
t_F
VIN
-GND
FIGURE 26A. TRANSIENT TEST CIRCUIT
FIGURE 27. TRANSIENT WAVEFORM MEASUREMENT POINTS
12
FN7698.2
November 3, 2011