MAX848 查看數據表（PDF） - Maxim Integrated

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MAX848

1-Cell to 3-Cell, High-Power, Low-Noise, Step-Up DC-DC Converters

Maxim Integrated 

1-Cell to 3-Cell, High-Power,

Low-Noise, Step-Up DC-DC Converters

ABSOLUTE MAXIMUM RATINGS

ON1, ON2, OUT, POUT to GND..................................-0.3V, +6V

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

LX to PGND ...............................................-0.3V, (VPOUT + 0.3V)

CLK/SEL, DATA, POKIN, REF,

AINSEL, AIN1, AIN2, FB, POK to GND .....-0.3V, (VOUT + 0.3V)

Continuous Power Dissipation (TA = +70°C)

Narrow SO (derate 8.7mW/°C above +70°C) ................696mW

Operating Temperature Range

MAX848ESE/MAX849ESE .................................-40°C to +85°C

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

Storage Temperature.........................................-65°C to +160°C

Lead Temperature (soldering, 10sec) .............................+300°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.

ELECTRICAL CHARACTERISTICS

(VOUT = 3.6V, GND = PGND = CLK/SEL = ON1 = ON2 = AINSEL = AIN1 = AIN2 = FB = POKIN, POUT = OUT, TA = 0°C to +85°C,

unless otherwise noted.)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Operating Voltage (Note 1)

0.7

V

REFERENCE

Reference Output Voltage

REF Load Regulation

REF Supply Rejection

IREF = 0mA

-1µA < IREF < 50µA

2.5V < VOUT < 5V

1.23

1.25

1.27

V

5

15

mV

0.2

5

mV

DC-DC CONVERTER

Output Voltage (Note 2)

VFB < 0.1V, CLK/SEL = OUT

3.17

3.34

3.40

V

MAX848

110

VOUT = 3.3V MAX849

300

VIN = 1.2V

MAX848

70

VOUT = 5V

MAX849

200

mA

Output Current

MAX848

200

VOUT = 3.3V MAX849

750

VIN = 2.4V

MAX848

130

VOUT = 5V

MAX849

500

mA

MAX848

250

VOUT = 3.3V MAX849

600

VIN = 2.7V

MAX848

150

VOUT = 5V

MAX849

800

FB Regulation Voltage

VOUT = 5V

MAX848, VIN = 3.3V

MAX849, VIN = 3.6V

Adjustable output, CLK/SEL = OUT

300

1000

1.215 1.240 1.265

V

FB Input Current

Output Voltage Adjust Range

VFB = 1.25V

200

nA

2.7

5.5

V

Output Voltage Lockout Range

(Note 3)

2.1

2.4

V

Load Regulation (Note 4)

CLK/SEL = OUT

-1.6

%

Minimum Start-Up Voltage (Note 5)

Frequency in Start-Up Mode

Operating Current in Shutdown

ILOAD < 1mA, TA > +25°C

VOUT = 1.5V

Current into OUT pin, V ON2 = 3.6V

0.9

1.1

V

40

300

kHz

4

20

µA

2 _______________________________________________________________________________________

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