5V or Adjustable, Low-Voltage,

Step-Up DC-DC Controller

4

_______________________________________________________________________________________

____________________________Typical Operating Characteristics (continued)

0

100

150

200

250

50

2

4

68

10

12

EXT RISE/FALL TIME vs. SUPPLY VOLTAGE

SUPPLY VOLTAGE (V)

250

0

-60

-20

60

140

REFERENCE OUTPUT RESISTANCE vs.

TEMPERATURE

50

TEMPERATURE (

°C)

20

100

150

-40

0

80

40

120

100

200

100µA

50µA

10µA

1.502

-60

-20

60

140

REFERENCE vs. TEMPERATURE

TEMPERATURE (

°C)

20

100

-40

0

80

40

120

1.500

1.498

1.496

1.494

1.492

1.504

1.506

A = EXT VOLTAGE, 5V/div

B = INDUCTOR CURRENT, 1A/div

MEDIUM-LOAD SWITCHING WAVEFORMS

A

B

C

0V

0A

20

µs/div

4.0

-60

-20

60

140

SHUTDOWN CURRENT vs. TEMPERATURE

TEMPERATURE (

°C)

20

100

-40

0

80

40

120

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

V+ = 15V

V+ = 4V

V+ = 8V

2.20

2.25

2.30

-60 -30

0

30

60

90

120

150

MINIMUM SWITCH OFF-TIME vs.

TEMPERATURE

TEMPERATURE (°C)

15.5

16.0

16.5

-60 -30

0

30

60

90

120

150

MAXIMUM SWITCH ON-TIME vs.

TEMPERATURE

TEMPERATURE (°C)

A = EXT VOLTAGE, 5V/div

B = INDUCTOR CURRENT, 1A/div

HEAVY-LOAD SWITCHING WAVEFORMS

A

B

C

0V

0A

2

µs/div