MAX1709 datasheet(3/12 Pages) MAXIM

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4A, Low-Noise, High-Frequency,

Step-Up DC-DC Converter

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VOUT = VCLK = +3.6V, ONA = ONB = FB = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)

ELECTRICAL CHARACTERISTICS

(VOUT = VCLK = +3.6V, ONA = ONB = FB = GND, TA = -40°C to +85°C, unless otherwise noted.) (Note 9)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ONA,

ONB, 3.3/5, 1.2V < VOUT < 5.5

0.8

VOUT

Input High Level

CLK, 2.7 V< VOUT < 5.5V

0.8 x VOUT

Logic Input Current

ONA,

ONB, CLK, 3.3/5

µA

Internal Oscillator Frequency

520

600

680

kHz

Maximum Duty Cycle

External Clock Frequency

Range

350

1000

kHz

CLK Pulse Width

(Note 8)

100

CLK Rise/Fall Time

(Note 8)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VFB < 0.1V, VIN = +2.4V

3.3/5 = GND, ISW = 1A

3.24

3.45

Output Voltage

(Note 1)

3.3/5 = OUT, ISW = 1A

4.9

5.2

FB Regulation Voltage

ISW = 1A

1.21

1.27

FB Input Current

VFB = +1.5V

200

Load Regulation

Measured between 1A < ISW < 5A (Note 2)

-0.45

%/A

Soft-Start Pin Current

SS/LIM = 1V

3.2

5.2

µA

OUT Leakage Current in

Shutdown

V ONB = 3.6V

µA

OUT Supply Current

VFB = 1.5V (Note 6)

400

µA

N-Channel Switch

On-Resistance

Ω

SS/LIM = unconnected

7.5

N-Channel Current Limit

SS/LIM = 150k

Ω to GND

3.5

Reference Voltage

IREF = 0

1.24

1.28

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