5

LT1306

RECTIFIER CURRENT (A)

0

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

1.5

1306 • G13

0.5

1.0

2.0

2.5

TA = –40°C

TA = 25°C

TA = 85°C

RECTIFIER CURRENT (A)

0

1.90

1.85

1.80

1.75

1.70

1.65

1.60

1.55

1.5

1306 • G14

0.5

1.0

2.0

Rectifier Saturation Voltage

vs Current

Stepdown-Mode Rectifier Voltage

vs Current

Continuous-Conduction Mode

Switching Waveforms in Boost

Operation

0.1V/DIV

AC

5V/DIV

0.5A/DIV

2

µs/DIV

1ms/DIV

2

µs/DIV

1ms/DIV

5V/DIV

5V/DIV

2A/DIV

5V/DIV

Start-Up to Shutdown Transient

Response*

Continuous-Conduction Mode

Switching Waveforms in

Stepdown Mode

50mV/DIV

AC

5V/DIV

0.5V/DIV

Transient Response of the

Converter in Figure 1 with a

50mA to 800mA Load Step

LOAD

CURRENT

0.5A/DIV

DC

INDUCTOR

CURRENT

1A/DIV

OUTPUT

0.1V/DIV

AC

*Notice that the Input Start-Up Current is well Controlled and the

Output Voltage Falls to Zero in Shutdown.