Rainbow-electronics MAX776 Manual do Utilizador descarregar pdf (Página 5)

MAX774/MAX775/MAX776

-5V/-12V/-15V or Adjustable,

High-Efficiency, Low I

Inverting DC-DC Controllers

_______________________________________________________________________________________

2.5

1.5

-60 60

SWITCH OFF-TIME vs. TEMPERATURE

2.0

MAX761-13

TEMPERATURE (°C)

OFF

(µs)

0 120

V+ = 5V

_____________________________Typical Operating Characteristics (continued)

= +25°C, unless otherwise noted.)

5.0

2.5

100

START-UP VOLTAGE

vs. LOAD CURRENT (BOOTSTRAPPED)

3.0

4.5

MA744/5/6-14

LOAD CURRENT (mA)

START-UP VOLTAGE (V)

10 1000

3.5

4.0

OUT

= -12V

OUT

= -15V

OUT

= -5V

5.0

2.5

0.1 100

START-UP VOLTAGE

vs. LOAD CURRENT (NON-BOOTSTRAPPED)

3.0

4.5

MA744/5/6-15

LOAD CURRENT (mA)

START-UP VOLTAGE (V)

10 1000

3.5

4.0

OUT

= -24V

OUT

= -15V

OUT

= -12V

OUT

= -5V

2200

800

2 4 10 16

MAX774

MAXIMUM LOAD vs. INPUT VOLTAGE

1200

1000

1800

2000

MAX774/5/6-16

INPUT VOLTAGE (V)

LOAD CURRENT (mA)

861214

1600

1400

BOOTSTRAPPED

NON-BOOTSTRAPPED

OUT

= -5V

-60 -40 60 140

EXT RISE AND FALL TIMES 

vs. TEMPERATURE

MAX774/5/6-9

TEMPERATURE (°C)

RISE &

FALL

(ns)

40200-20 80 120100

5V RISE

100

120

110

130

5V FALL

12V RISE

12V FALL

EXT

= 1nF

-60 -40 60 140

EXT RISE AND FALL TIMES

vs. TEMPERATURE

MAX774/5/6-10

TEMPERATURE (°C)

RISE &

FALL

(ns)

40200-20 80 120100

5V RISE

450

400

500

5V FALL

12V RISE

12V FALL

EXT

= 5nF

300

250

350

150

100

200

-60 60

SWITCH ON-TIME vs. TEMPERATURE

MAX761-13

TEMPERATURE (°C)

(µs)

0 120

V+ = 5V

8.0

7.8

7.6

7.4

7.2

7.0

6.8

6.6

6.4

6.2

6.0

-60 -40 60 140

SWITCH ON-TIME/OFF-TIME RATIO

MAX774/5/6-6

TEMPERATURE (°C)

OFF

RATIO (µs/µs)

40200-20 80 120100

V+ = 5V

4.0

-60 -40 60 140

SHUTDOWN CURRENT

vs. TEMPERATURE

1.0

0.5

2.5

3.5

MAX774/5/6-7

TEMPERATURE (°C)

(µA)

40200-20 80 120100

2.0

1.5

3.0

V+ = 15V

V+ = 8V

V+ = 4V

1 2 3 4 5 6 7 8 9 10 ... 15 16

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Rainbow-electronics MAX776 Manual do Utilizador Página 5

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