Rainbow-electronics MAX1595 Manual do Utilizador descarregar pdf (Página 3)

MAX1595

Regulated 3.3V/5.0V Step-Up/Step-Down

Charge Pump

_______________________________________________________________________________________ 3

__________________________________________Typical Operating Characteristics

(Circuit of Figure 4, V

= 2V for MAX1595_ _ _33, V

= 3V for MAX1595_ _ _50, T

= +25°C, unless otherwise noted.)

0.1

1000

100

10000

021345

NO LOAD SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX1595 toc01

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (µA)

OUT

= 5V

200ns/div

OUTPUT WAVEFORM

50mV/div

MAX1595 toc02

OUTPUT WAVEFORM. AC-COUPLED.

= 3.6V, I

LOAD

= 100mA, C

OUT

= 1µF

OUT

= 5V

4.90

5.00

4.98

4.96

4.94

4.92

5.06

1 10 100

1000

OUTPUT VOLTAGE

vs. LOAD CURRENT

MAX1595 toc03

LOAD CURRENT (mA)

OUTPUT VOLTAGE (V)

5.04

5.02

= 3V

= 3.6V

= 3.3V

OUT

= 5V

100

1 10 100

3V EFFICIENCY

vs. LOAD CURRENT

MAX1595 toc04

LOAD CURRENT (mA)

EFFICIENCY (%)

= 1.8V

= 2.4V

2ms/div

LINE-TRANSIENT RESPONSE

MAX1595 toc07

A: INPUT VOLTAGE: V

= 3.1V TO 3.6V, 500mV/div

B: OUTPUT VOLTAGE: I

LOAD

= 50mA, 100mV/div

100

0.1 1 10 100 1000

5V EFFICIENCY

vs. LOAD CURRENT

MAX1595 toc05

LOAD CURRENT (mA)

EFFICEINCY (%)

= 3.6V

= 3.3V

= 3V

100µs/div

SHUTDOWN TIMING

MAX1595 toc06

A: OUTPUT VOLTAGE: R

= 100Ω, 2V/div

B: SHDN VOLTAGE: 2V/div

A5V

200µs/div

LOAD-TRANSIENT RESPONSE

MAX1595 toc08

A: LOAD CURRENT: I

LOAD

= 5mA to 95mA, 100mA/div

B: OUTPUT VOLTAGE: AC-COUPLED 100mV/div

OUT

= 1µF

OUTPUT VOLTAGE

vs. SUPPLY VOLTAGE

MAX1595 toc09

SUPPLY VOLTAGE (V)

OUTPUT VOLTAGE (V)

OUT

= 5V, I

LOAD

= 125mA

OUT

= 3.3V, I

LOAD

= 75mA

1 2 3 4 5 6 7 8

Charge Pump 1

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