MAX1797EUA+T

更新时间： 2024-02-28 03:02:18

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美信 - MAXIM		转换器
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13页	398K
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数据手册

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MAX1797EUA+T 数据手册

Low Supply Current, Step-Up DC-DC Converters

with True-Shutdown

ABSOLUTE MAXIMUM RATINGS

OUT, LX, SHDN, LBI, LBO, BATT to GND................-0.3V to +6V

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

Junction Temperature......................................................+±50°C

Storage Temperature Range.............................-65°C to +±50°C

Lead Temperature (soldering, ±0s) .................................+300°C

FB .............................................................-0.3V to (V

+ 0.3V)

OUT

, I

..............................................................................±±.5A

LX OUT

Output Short-Circuit Duration ...................................................5s

Continuous Power Dissipation

8-Pin µMAX (derate 4.±mW/°C above +70°C).............330mW

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.

ELECTRICAL CHARACTERISTICS

= +2V, OUT = FB (V

= +25°C.)

= +3.3V), SHDN = LBI = GND, T = 0°C to +85°C, unless otherwise noted. Typical values are at

OUT A

BATT

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Input Voltage

Operating Voltage

After startup

(Note ±)

0.7

±.0

5.5

±.0

BATT

Startup Voltage

= +25 C, R = 3k

0.85

-2.2

3.3

Startup Voltage Tempco

mV/ C

FB = OUT

FB = GND

3.±7

4.80

3.43

5.20

OUT

Output Voltage

5.0

Adjustable Output Voltage

Range

2.0

5.5

MAX±795

MAX±796

MAX±797

MAX±795

MAX±796

MAX±797

±00

200

400

±80

300

550

±20

200

370

BATT = +2V,

FB = OUT

OUT

= +3.3V)

Steady-State Output Current

OUT

BATT = +2V,

FB = GND

±00

250

OUT

= +5.0V)

Feedback Set-Point Voltage

(Adjustable Mode)

= +2V to +5.5V

±.20

±.24

±.28

OUT

Feedback Input Current

= +±.24V

±00

0.3

NFET

PFET

0.±7

0.27

0.25

0.5

Internal NFET, PFET On-

Resistance

= +3.3V,

OUT

DS(ON)

= ±00mA

0.45

0.35

0.625

±.25

MAX±795

MAX±796

MAX±797

0.2

0.4

0.8

LX Switch Current Limit (NFET

only)

LIM

±.0

LX Leakage Current

= 0 and +5.5V, V = +5.5V

OUT

0.2

LEAK

Synchronous Rectifier Turn-Off

Current Limit

200

Damping Switch On-Resistance

±00

400

DAMP

Operating Current into OUT

(Note 2)

= +±.4V

_______________________________________________________________________________________

123 4 5 6 7...13

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