MAX1709_07 datasheet(2/14 Pages) MAXIM

Part #	MAX1709

Description	4A, Low-Noise, High-Frequency, Step-Up DC-DC Converter

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Manufacturer	MAXIM [Maxim Integrated Products]

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4A, Low-Noise, High-Frequency,

Step-Up DC-DC Converter

2

_______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VOUT = VCLK = +3.6V, ONA = ONB = FB = GND, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +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 (VOUT + 0.3V)

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

Continuous Power Dissipation (TA = +70°C)

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

28-Pin TSSOP Exposed Pad

(derate 23.8mW/°C above +70°C) ...................................1.9W

28-Pin TSSOP Exposed Pad Junction-to-Exposed

Pad Thermal Resistance ......................................……1.2°C/W

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

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

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

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

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

3.3/5 = GND, ISW = 1A

3.26

3.34

3.42

Output Voltage

VFB < 0.1V (Note 1)

3.3/5 = OUT, ISW = 1A

4.92

5.05

5.17

V

Load Regulation

Measured between 1A < ISW < 3A (Note 2)

-0.25

-0.45

%/A

FB Regulation Voltage

ISW = 1A

1.215

1.240

1.265

V

FB Input Current

VFB = +1.5V

1

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

VOUT =1.5V

40

400

kHz

Minimum Startup Voltage

IOUT < 1mA (Note 1), TA = +25°C (Note 4)

0.9

1.1

V

Minimum Operating Voltage

(Note 5)

0.7

V

Soft-Start Pin Current

VSS/LIM = 1V

3.2

4

5.0

µA

OUT Supply Current

VFB = 1.5V (Note 6)

200

440

µA

OUT Leakage Current In

Shutdown

V ONB = 3.6V

0.1

5

µA

LX Leakage Current

VLX = V ONB = VOUT = +5.5V

0.1

40

µA

n-Channel Switch

On-Resistance

22

40

m

Ω

SS/LIM = open

7.5

9

12

n-Channel Current Limit

SS/LIM = 150k

Ω to GND

3.5

5

6.5

A

MAX1709EUI+

10

RMS Switch Current

MAX1709ESE

6

ARMS

Reference Voltage

IREF = 0

1.245

1.260

1.275

V

Reference Load Regulation

-1µA < IREF < 50µA

4

10

mV

Reference Supply Rejection

+2.5V < VOUT < +5.5V

0.2

5

mV

ONA,

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

0.2

×

VOUT

Input Low Level (Note 7)

CLK, 2.7V < VOUT < 5.5V

0.2

×

VOUT

V

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