Rainbow-electronics MAX8715 Manual do Utilizador descarregar pdf (Página 5)

Typical Operating Characteristics

(Circuit of Figure 1, V

= 3.3V, f

OSC

= 640kHz, T

= +25°C, unless otherwise noted.)

MAX1790 toc01

1100010010

MAX1790 EFFICIENCY

vs. OUTPUT CURRENT

OUTPUT CURRENT (mA)

EFFICIENCY (%)

OSC

= 1.2MHz

= 2.7

= 3.3V

OUT

= 5V

OSC

= 640kHz

= 5.4

1 100010010

MAX1790 EFFICIENCY

vs. OUTPUT CURRENT

MAX1790 toc02

OUTPUT CURRENT (mA)

EFFICIENCY (%)

OSC

= 1.2MHz

= 5.4

= 3.3V

OUT

= 12V

OSC

= 640kHz

= 10

OUTPUT CURRENT (mA)

1 100010010

MAX1790 EFFICIENCY

vs. OUTPUT CURRENT

MAX1790 toc03

EFFICIENCY (%)

OSC

= 1.2MHz

= 5.4

= 5V

OUT

= 12V

OSC

= 640kHz

= 10

0.2

0.1

0.4

0.3

0.6

0.5

0.7

2.5 3.5 4.03.0 4.5 5.0 5.5

NO-LOAD SUPPLY CURRENT

vs. INPUT VOLTAGE

MAX1790 toc04

INPUT VOLTAGE (V)

NO-LOAD SUPPLY CURRENT (mA)

OUT

= 12V

OSC

= 1.2MHz

OSC

= 640kHz

11.60

11.70

11.65

11.80

11.75

11.90

11.85

11.95

12.05

12.00

12.10

040608020 100 120 140 180160 200

MAX1790 OUTPUT VOLTAGE

vs. OUTPUT CURRENT

MAX1790 toc05

OUTPUT CURRENT (mA)

OUTPUT VOLTAGE (V)

OSC

= 640kHz

= +85

= +25

= -40

MAX8715 EFFICIENCY

vs. OUTPUT CURRENT

MAX1790 toc06

OUTPUT CURRENT (mA)

EFFICIENCY (%)

10010

1 1000

= 5.0V

= 3.3V

OUT

= 9V

OSC

= 1.2MHz

L = 6.8

MAX1790/MAX8715

Low-Noise Step-Up DC-DC Converters

_______________________________________________________________________________________ 5

1 2 3 4 5 6 7 8 9 10 ... 13 14

MAX1790/MAX8715 1

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