Rainbow-electronics MAX5929 Uživatelský manuál stáhnout pdf (Strana 2)

MAX5927/MAX5929

Low-Voltage, Quad, Hot-Swap

Controllers/Power Sequencers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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.

(All voltages referenced to GND, unless otherwise noted.)

IN_ ..........................................................................-0.3V to +14V

GATE_.............................................................-0.3V to (IN_ + 6V)

BIAS (Note 1) .............................................. (V

- 0.3V) to +14V

ON_, STAT_, LIM_ (MAX5927), TIM, MODE,

LATCH (MAX5927), POL (MAX5927)

(Note 1).....................................................-0.3V to (V

+ 0.3V)

SENSE_........................................................-0.3V to (IN_ + 0.3V)

Current into Any Pin..........................................................±50mA

Continuous Power Dissipation (T

= +70°C)

24-Pin QSOP (derate 9.5mW/°C above +70°C)............762mW

32-Pin Thin QFN (derate 21.3mW/°C above +70°C) ..1702mW

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

ELECTRICAL CHARACTERISTICS

IN_

= +1V to +13.2V provided at least one supply is larger than or equal to +2.7V and only one supply is > +11.0V, T

= -40°C to

+85°C, unless otherwise noted. Typical values are at V

IN1

= 12.0V, V

IN2

= 5.0V, V

IN3

= 3.3V, V

IN4

= 1.0V, V

ON_

= +3.3V, and

= +25°C.) (Notes 1, 2)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

POWER SUPPLIES

IN_ Input Voltage Range V

IN_

At least one V

IN_

≥ +2.7V and only one

IN_

> +11.0V

1.0 13.2 V

Supply Current I

IN1

+ I

IN2

+ I

IN3

+ I

IN4

, V

ON_

= 2.7V,

IN_

= +13.2V, after STAT_ asserts

2.5 5 mA

CURRENT CONTROL

= +25°C 22.5 25 27.5

LIM_ = GND,

MAX5927/MAX5929

(Note 4)

= -40°C to +85°C 21.0 27.5

LIM_

= 10kΩ (MAX5927) 80 125

Slow-Comparator Threshold

IN_

- V

SENSE_

)

(Note 3)

SC,TH

LIM_

from LIM_ to GND (MAX5927)

LIM_

x 7.5 x

-6

+ 25mV

1mV overdrive 3 ms

Slow-Comparator Response Time

(Note 4)

SCD

50mV overdrive 130 µs

Fast-Comparator Threshold

IN_

- V

SENSE_

)

FC,TH

2 x

Fast-Comparator Response Time t

FCD

10mV overdrive, from overload condition 200 ns

SENSE_ Input Bias Current I

B SENSE_

SENSE_

= V

IN_

0.03 1 µA

MOSFET DRIVER

TIM

= 100kΩ 8.0 10.8 13.6

TIM

= 4kΩ (minimum value) 0.30 0.4 0.55Startup Period (Note 5) t

START

TIM floating (default) 5 9 14

Note 1: V

is the largest of V

IN1

, V

IN2

, V

IN3

, and V

IN4

1 2 3 4 5 6 7 ... 24 25

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