SC172MLTRT datasheet(9/27 Pages) SEMTECH

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Typical Characteristics

OCP Valley Threshold vs Ambient Temperature

2.0

2.3

2.6

2.9

3.2

3.5

-40 -20

80 100 120

Temperature (Degree C)

VDD=5V

VDD=3V

IVIN Input Current In Shutdown vs Temperature

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

-40

-15

110 135

Temperature (°C)

VIN=5V

Blue: VLX=VIN

Black: VLX=GND

IBST Leakage Current vs Temperature

-0.0200

-0.0180

-0.0160

-0.0140

-0.0120

-0.0100

-40 -15 10

85 110 135

Temperature (°C)

VIN=5V

VBST=VIN

Start up waveform ( VIN=5V, VOUT=1.2V, IOUT=2A,

Channel 1: 500mV/Div, Channel 4: 1A/Div, Time: 0.5ms/Div

)

Load Transient Test (VIN=5V, VOUT=1.2V, IOUT= 0A to 2A,

Forced Continuous Conduction Mode, LOUT=1.3µH,

COUT=2x22µF, Channel 1: 50mV/Div, Channel

2:5V/Div,Channel 4: 1A/Div, Time:10µs/Div)

Load Transient Test (VIN=5V, VOUT=1.2V, IOUT= 2A to 0A,

Forced Continuous Conduction Mode, LOUT=1.3µH,

COUT=2x22µF, Channel 1: 50mV/Div, Channel

2:5V/Div,Channel 4: 1A/Div, Time:10µs/Div)

SC172

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