Rainbow-electronics MAX8620 Bedienungsanleitung PDF herunterladen (Seite 4)

MAX8620Y

µPMIC for Microprocessors or DSPs

in Portable Equipment

4 _______________________________________________________________________________________

Typical Operating Characteristics

IN1

= V

IN2

= 3.7V, PWR_ON = IN1, L = 2.2µH (LQH31CN2R2M53), C

= 150pF, V

OUT1

= V

OUT2

= 2.6V, V

OUT3

= 1.867V (R1 =

150kΩ, R2 = 75kΩ), C

= 10µF, C

= 0.01µF, C

OUT1

= C

OUT2

= 4.7µF, C

OUT3

= 2.2µF, RESET pulled up with 100kΩ to OUT1,

= +25°C, unless otherwise noted.)

EFFICIENCY vs. LOAD CURRENT

MAX8620Y toc01

LOAD CURRENT (mA)

EFFICIENCY (%)

100101

100

0.1 1000

L = 4.7µH

L = 2.2µH

L = 1.0µH

INPUT QUIESCENT CURRENT

vs. INPUT VOLTAGE

MAX8620Y toc02

INPUT VOLTAGE (V)

QUIESCENT CURRENT (µA)

5.04.53.5 4.03.02.5

100

120

140

160

180

2.0 5.5

SWITCHING FREQUENCY vs. LOAD CURRENT

SWITCHING FREQUENCY (MHz)

45040035030025020015010050

0.1

0 500

MAX8620Y toc03

LOAD CURRENT (mA)

L = 4.7

µH

L = 2.2µH

L = 1.0µH

EFFICIENCY vs. OUTPUT VOLTAGE

OUTPUT VOLTAGE (V)

EFFICIENCY (%)

2.42.20.8 1.0 1.2 1.6 1.81.4 2.0

100

0.6 2.6

MAX8620Y toc04

L = 4.7µH

L = 2.2µH

L = 1.0µH

LIGHT-LOAD SWITCHING WAVEFORMS

MAX8620Y toc05

200ns/div

OUT

AC-COUPLED

2V/div

20mV/div

100mA/div

HEAVY-LOAD SWITCHING WAVEFORMS

MAX8620Y toc06

200ns/div

OUT

AC-COUPLED

2V/div

20mV/div

200mA/div

1 2 3 4 5 6 7 8 9 ... 17 18

MAX8620Y 1

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