Rainbow-electronics MAX1672 Manual do Utilizador descarregar pdf (Página 4)

MAX1672

Step-Up/Down DC-DC Converter

in QSOP Package

4 _______________________________________________________________________________________

_____________________________Typical Operating Characteristics (continued)

= +25°C, unless otherwise noted.)

100

200

300

400

0 21 3 4

MAXIMUM OUTPUT CURRENT vs.

INPUT VOLTAGE (V

OUT

= 5V)

MAX1672-04

INPUT VOLTAGE (V)

MAXIMUM OUTPUT CURRENT (mA)

MAXIMUM RECOMMENDED

OUTPUT CURRENT

ILIM = GND (0.5A)

ILIM = PS (0.8A)

100

200

300

400

0 21 3 4

MAXIMUM OUTPUT CURRENT

vs. INPUT VOLTAGE (V

OUT

= 3.3V)

MAX1672-05

INPUT VOLTAGE (V)

MAXIMUM OUTPUT CURRENT (mA)

MAXIMUM RECOMMENDED

OUTPUT CURRENT

ILIM = GND (0.5A)

ILIM = PS (0.8A)

100

200

300

400

4 5 7 8 9 116 10 12

MAXIMUM OUTPUT CURRENT

vs. INPUT VOLTAGE

(POWER DISSIPATION LIMIT)

MAX1672-06

INPUT VOLTAGE (V)

MAXIMUM OUTPUT CURRENT (mA)

MAXIMUM RECOMMENDED

OUTPUT CURRENT

OUT

= 5V

OUT

= 3.3V

= +25°C

= +85°C

OUT

= 3.3V

OUT

= 5V

MAXIMUM RECOMMENDED INPUT VOLTAGE

1000

0 1 2 3 4 5 6 7 8 9 10 11

NO-LOAD BATTERY CURRENT

vs. INPUT VOLTAGE

MAX1672-07

INPUT VOLTAGE (V)

SUPPLY CURRENT (µA)

100

OUT

= 5V

OUT

= 3.3V

2ms/div

LINE-TRANSIENT RESPONSE

MAX1672-10

A: V

OUT

= 5V (100mV/div, AC COUPLED)

B: V

= 2V TO 4V (I

OUT

= 100mA)

0.01

0 1 2 3 4 5 6 7 8 9 10 11

SHUTDOWN CURRENT

vs. INPUT VOLTAGE

MAX1672-08

INPUT VOLTAGE (V)

SUPPLY CURRENT (µA)

0.1

0.01 1 10 1000.1 1000

LINEAR REGULATOR POWER-SUPPLY

REJECTION RATIO vs. FREQUENCY

MAX1672-09

FREQUENCY (kHz)

PSRR (dB)

2ms/div

LOAD-TRANSIENT RESPONSE

MAX1672-11

A: V

OUT

= 5V (50mV/div, AC COUPLED)

B: I

OUT

= 10mA TO 100mA (V

= 2V)

10µs/div

OUTPUT RIPPLE (MEDIUM LOAD)

MAX1672-12

A: V

OUT

= 5V (20mV/div, AC COUPLED)

B: I

(500mA /div) (V

= 2.7V, I

OUT

= 80mA)

1 2 3 4 5 6 7 8 9 10 11 12

Step-Up/Down DC-DC Converter 1

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