Rainbow-electronics MAX1692 Manual do Utilizador descarregar pdf (Página 4)

1.74

1.76

1.80

1.78

1.82

1.84

0 400300200100 500 600 700 800 900

OUTPUT VOLTAGE vs.

LOAD CURRENT

MAX1692-10

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

= 2.7V

OUT

= 1.8V

R1 = 138kΩ

R2 = 301kΩ

MAX1692

Low-Noise, 5.5V-Input,

PWM Step-Down Regulator

4 _______________________________________________________________________________________

200

100

400

300

500

600

0 300 450150 600 750 900

DROPOUT VOLTAGE vs.

LOAD CURRENT

MAX1692-01

LOAD CURRENT (mA)

DROPOUT VOLTAGE (mV)

OUT

= 2.5V

OUT

= 3.3V

1 100010010

EFFICIENCY vs. LOAD CURRENT

OUT

= 3.3V)

100

MAX1692-02

LOAD CURRENT (mA)

EFFICIENCY (%)

= 5.0V

= 3.6V

LIM = IN

R1 = 505kΩ

R2 = 301kΩ

1 100010010

EFFICIENCY vs. LOAD CURRENT

OUT

= 2.5V)

100

MAX1692-03

LOAD CURRENT (mA)

EFFICIENCY (%)

= 5.0V

= 2.7V

= 3.6V

LIM = IN

R1 = 309kΩ

R2 = 301kΩ

1 100010010

EFFICIENCY vs. LOAD CURRENT

OUT

= 1.8V)

100

MAX1692-04

LOAD CURRENT (mA)

EFFICIENCY (%)

= 2.7V

= 5.0V

= 3.6V

LIM = IN

R1 = 138kΩ

R2 = 301kΩ

1.5

1.0

0.5

2.5

2.0

4.5

4.0

3.5

3.0

5.0

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

BATTERY INPUT CURRENT vs.

INPUT VOLTAGE

MAX1692-07

INPUT VOLTAGE (V)

BATTERY INPUT CURRENT (mA)

SYNC/PWM = IN

OUT

= 3.3V

OUT

= 1.8V

OUT

= 2.5V

1.2

1.21

1.205

1.225

1.22

1.215

1.245

1.24

1.235

1.23

1.25

0 300100 200 400 500 600 700 800 900 1000

FEEDBACK VOLTAGE

vs. LOAD CURRENT

MAX1692-05

LOAD CURRENT (mA)

FB VOLTAGE (V)

= 5.0V

R1 = 309kΩ

R2 = 301kΩ

SYNC/PWM = GND

LIM = IN

LIM = GND

100

2.7 3.53.1 3.9 4.3 4.7 5.1 5.5

BATTERY INPUT CURRENT vs.

INPUT VOLTAGE

MAX1692-06

INPUT VOLTAGE (V)

BATTERY INPUT CURRENT (µA)

OUT

= 1.8V

SYNC/PWM = GND

= +85°C

= +25°C

= -40°C

1.0

1.5

2.0

2.5

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

BATTERY INPUT CURRENT vs. INPUT

VOLTAGE AND TEMPERATURE

MAX1692-09

INPUT VOLTAGE (V)

BATTERY INPUT CURRENT (mA)

OUT

= 1.8V

SYNC/PWM = IN

= +85°C

= +25°C

= -40°C

Typical Operating Characteristics

(SYNC/PWM = GND, circuit of Figure 2, L = Sumida CD43-100, T

= +25°C, unless otherwise noted.)

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

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