Rainbow-electronics MAX1843 Manual do Utilizador descarregar pdf (Página 2)

MAX1843

2.7A, 1MHz, Low-Voltage, Step-Down Regulator with

Internal Synchronous Rectification in QFN Package

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= V

= +3.3V, FBSEL = 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.

, IN to GND ........................................................-0.3V to +6V

IN to V

.............................................................................±0.3V

GND to PGND.....................................................................±0.3V

All Other Pins to GND.................................-0.3V to (V

+ 0.3V)

LX Current (Note 1).............................................................±4.7A

REF Short Circuit to GND Duration ............................Continuous

ESD Protection .....................................................................±2kV

Continuous Power Dissipation (T

= +70°C)

28-Pin QFN (derate 20mW/°C above +70°C, part mounted

on 1in

of 1oz copper)......................................................1.6W

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

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

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

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

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input Voltage V

, V

3.0 5.5 V

= +25°C

to +85°C

2.500 2.525 2.550

FBSEL = V

= 0°C to

+85°C

2.487 2.525 2.563

= +25°C

to +85°C

1.500 1.515 1.530

FBSEL =

unconnected

= 0°C to

+85°C

1.492 1.515 1.538

= +25°C

to +85°C

1.800 1.818 1.836

FBSEL = REF

= 0°C to

+85°C

1.791 1.818 1.845

= +25°C

to +85°C

1.089 1.100 1.111

Preset Output Voltage V

OUT

+3V to

+5.5V

LOAD

0 to 2.5A

OUT

FBSEL = GND

= 0°C to

+85°C

1.084 1.100 1.117

Adjustable Output Voltage

Range

= V

= +3V to +5.5V, FBSEL = GND V

REF

AC Load Regulation Error 2%

DC Load Regulation Error 0.4 %

Dropout Voltage V

= V

= +3V, I

LOAD

= 1A 250 mV

= +25°C to +85°C 1.089 1.100 1.111

Reference Voltage V

REF

= 0°C to +85°C 1.084 1.100 1.117

Reference Load Regulation ∆V

REF

= -1µA to +10µA 0.5 2 mV

= +4.5V 90 200

PMOS Switch On-Resistance R

ON,P

= 0.5A

= +3V 110 250

mΩ

= +4.5V 70 150

NMOS Switch On-Resistance R

ON,N

= 0.5A

= +3V 80 200

mΩ

Current-Limit Threshold I

LIMIT

3.1 3.6 4.1 A

RMS LX Output Current 3.1 A

Note 1: LX has internal clamp diodes to PGND and IN. Applications that forward bias these diodes should take care not to exceed the

IC’s package power dissipation limits.

1 2 3 4 5 6 7 ... 12 13

Comentários a estes Manuais

Sem comentários

Rainbow-electronics MAX1843 Manual do Utilizador Página 2

Comentários a estes Manuais

Manuais e produtos relacionados com Sensores Rainbow-electronics MAX1843