Rainbow-electronics MAX1703 Manual do Utilizador descarregar pdf (Página 5)

MAX1703

1-Cell to 3-Cell, High-Power (1.5A),

Low-Noise, Step-Up DC-DC Converter

_______________________________________________________________________________________

100

0.1 1 10 100 1000 10,000

EFFICIENCY vs. LOAD CURRENT

OUT

= 5V)

MAX1703-01

LOAD CURRENT (mA)

EFFICIENCY (%)

= 3.6V

= 2.4V

= 1.2V

PFM

PWM

100

0.1 1 10 100 1000 10,000

EFFICIENCY vs. LOAD CURRENT

OUT

= 3.3V)

MAX1703-02

LOAD CURRENT (mA)

EFFICIENCY (%)

= 2.4V

= 1.2V

= 0.9V

PFM

PWM

03412 56

NO-LOAD BATTERY CURRENT

vs. INPUT VOLTAGE

MAX1703-03

INPUT VOLTAGE (V)

BATTERY CURRENT (mA)

= +85°C

LOW-POWER MODE

= +25°C

= -40°C

0.5

1.0

2.0

1.5

2.5

0.5 3.0 3.5 4.01.0 1.5 2.0 2.5 4.5 5.0 5.5

SHUTDOWN SUPPLY CURRENT

vs. INPUT VOLTAGE

MAX1703-04

INPUT VOLTAGE (V)

SHUTDOWN CURRENT (µA)

= +85°C

INCLUDES ALL EXTERNAL

COMPONENT LEAKAGES.

CAPACITOR LEAKAGE

DOMINATES AT T

= +85°C

= +25°C,

= -40°C

1.2460

1.2470

1.2490

1.2480

1.2500

1.2510

1.2520

0 4050 607010 20 30 80 90

REFERENCE VOLTAGE

vs. REFERENCE CURRENT

MAX1703-07

REFERENCE CURRENT (µA)

REFERENCE VOLTAGE (V)

= 3.6V

OUT

= 5V

LOW-POWER MODE

2.0

0.6

0.01 0.1 1 10 100 1000

START-UP VOLTAGE vs. LOAD CURRENT

0.8

MAX1703-05

LOAD CURRENT (mA)

START-UP VOLTAGE (V)

1.0

1.2

1.6

1.4

1.8

OUT

= 5V

PWM MODE

1.2450

1.2490

1.2470

1.2510

1.2530

1.2550

-40 20 40 60-20 0 80 100

REFERENCE VOLTAGE

vs. TEMPERATURE

MAX1703-06

TEMPERATURE (°C)

REFERENCE VOLTAGE (V)

100 1k 10k 100k 1M 10M

NOISE SPECTRUM

-1

MAX1703-14

FREQUENCY (Hz)

NOISE (mV

RMS

)

OUT

= 5V

= 3.6V

LOAD

= 500mA

__________________________________________Typical Operating Characteristics

= +3.6V, V

OUT

= 5V, T

= +25°C, unless otherwise noted.)

1 2 3 4 5 6 7 8 9 10 ... 15 16

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