ISL6121_14 Datasheet, PDF (5/11 Pages) Intersil Corporation – Single Supply Integrated Current Limiting Controller

ISL6121
Typical Performance Curves
ON
OFF
ENABLE
FAULT
LATCH-OFF SET
RESET BY
ENABLE
VOUT
CURRENT
REGULATION
SETTLING
TIME (1.4ms)
OVER CURRENT
IOUT
2A CURRENT
LIMIT
12ms CURRENT REGULATION PERIOD
FIGURE 2. OPERATIONAL WAVEFORMS
75
70
65
VIN = 2.7V
60
55
VIN = 5V
50
45
VIN = 3.3V
40
35
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100
TEMPERATURE (^oC)
FIGURE 3. SWITCH RESISTANCE AT 1A
ENABLE
CL = 0.1µF, 10µF
VOUT
C_L = 100µF
VOUT (1V/DIV.)
TIME (200µs/DIV.)
FIGURE 4. VOUT SOFT START vs CLOAD
2400
2200
2000
1800
-40^oC
25^oC
85^oC
1600
1.3 1.5 2.0 2.5 3.0 3.5 4.0 4.5 4.8
VOUT (V)
FIGURE 6. CURRENT REGULATION vs VOUT (VIN = 5.0V)
5
2400
2200
-40^oC
2000
25^oC
1800
85^oC
1600
1.25 1.5
1.75 2.0 2.25 2.5
VOUT (V)
2.75 3.0
3.1
FIGURE 5. CURRENT REGULATION vs VOUT (VIN = 3.3V)
CURRENT REGULATED
LEVEL
NOMINAL CURRENT
TIME (200µs /DIV.)
FIGURE 7. OC TO CR SETTLING TIME WAVEFORMS
FN9004.2
November 12, 2004