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Typical Characteristics (continued)
Ambient temperature is 25°C, input voltage is 3.6 V, HWEN = IN, C
IN
= C
OUT
= 2×10 µF and L=1 µH, unless
otherwise noted .
ILED (500mA/DIV)
IIN (1A/DIV)
VOUT (2V/DIV)
TIME (500 μs/DIV)
ILED1/2=1006mA fSW=2Mhz VLED=3.4V
VOUT (2V/DIV)
ILED (500mA/DIV)
IIN (1A/DIV)
TIME (500 μs/DIV)
ILED1/2=1006mA fSW=2Mhz VLED=3.4V
1.60
1.64
1.68
1.72
1.76
1.80
1.84
1.88
1.92
1.96
2.00
2.04
2.08
2.12
2.16
2.20
2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3
ICL (A)
VIN (V)
ILED=1.5A fSW=2MHz VLED=4.5V
ICL=1.9A
Fig 35. Inductor Current Limit vs Input Voltage
1.60
1.64
1.68
1.72
1.76
1.80
1.84
1.88
1.92
1.96
2.00
2.04
2.08
2.12
2.16
2.20
2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3
ICL (A)
VIN (V)
ILED=1.5A fSW=4MHz VLED=4.5V
ICL=1.9A
Fig 36. Inductor Current Limit vs Input Voltage
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9
ICL (A)
VIN (V)
ILED=1.5A fSW=2MHz VLED=4.5V
ICL=2.8A
Fig 37. Inductor Current Limit vs Input Voltage
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
2.5 2.7 2.9 3.1 3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9
ICL (A)
VIN (V)
ILED=1.5A fSW=4MHz VLED=4.5V
ICL=2.8A
Fig 38. Inductor Current Limit vs Input Voltage
