Rainbow-electronics MAX1709 Bedienungsanleitung PDF herunterladen (Seite 2)

MAX1709

4A, Low-Noise, High-Frequency,

Step-Up DC-DC Converter

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

OUT

= V

CLK

= +3.6V, ONA = ONB = FB = GND, T

= 0°C to +85°C, unless otherwise noted. Typical values are at T

= +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ONA, ONB, OUT, SS/LIM, 3.3/5 to GND ...............-0.3V to +6.0V

LX to PGND ...........................................................-0.3V to +6.0V

FB, CLK, REF to GND.............................. -0.3V to (V

OUT

+ 0.3V)

PGND to GND .......................................................-0.3V to +0.3V

Continuous Power Dissipation (T

= +70°C)

16-Pin Narrow SO (derate 16.5mW/°C above +70°C) .....1.3W

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature ........................................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER CONDITIONS MIN TYP MAX UNITS

3.3/5 = GND, I

= 1A 3.26 3.34 3.42

Output Voltage V

< 0.1V (Note 1)

3.3/5 = OUT, I

= 1A 4.92 5.05 5.17

Load Regulation Measured between 1A < I

< 3A (Note 2) -

0.25

0.45

%/A

FB Regulation Voltage I

= 1A

1.215

1.240

1.265

FB Input Current V

= +1.5V

200 nA

Output Voltage Adjust Range 2.5 5.5 V

Output Undervoltage Lockout (Note 3) 2.0 2.3 V

Frequency in Startup Mode V

OUT

= 1.5V 40 400 kHz

Minimum Startup Voltage I

OUT

< 1mA (Note 1), T

= +25°C (Note 4) 0.9 1.1 V

Minimum Operating Voltage (Note 5) 0.7 V

Soft-Start Pin Current V

SS/LIM

= 1V 3.2 4 5.0 µA

OUT Supply Current V

= 1.5V (Note 6) 200 440 µA

OUT Leakage Current In

Shutdown

ONB

= 3.6V 0.1 5 µA

LX Leakage Current V

= V

ONB

= V

OUT

= +5.5V 0.1 40 µA

N-Channel Switch

On-Resistance

22 40 m

Ω

SS/LIM = open

7.5

N-Channel Current Limit

SS/LIM = 150k



to GND

3.5

6.5

RMS Switch Current 10

RMS

Reference Voltage I

REF

= 0

1.245

1.260

1.275

Reference Load Regulation -1µA

″

REF

″

50µA410mV

Reference Supply Rejection +2.5V

″

OUT

″

+5.5V 0.2 5 mV

ONA,

ONB

, 3.3/5, 1.2V < V

OUT

< 5.5V

0.2

OUT

Input Low Level (Note 7)

CLK, 2.7V < V

OUT

< 5.5V

0.2

OUT

1 2 3 4 5 6 7 ... 11 12

Step-Up DC-DC Converter 1

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