Rainbow-electronics MAX4987BE Manual do Utilizador descarregar pdf (Página 3)

MAX4987AE/MAX4987BE

Overvoltage-Protection Controller

with USB ESD Protection

_______________________________________________________________________________________ 3

Note 2: All timing is specified using 20% and 80% levels, unless otherwise noted.

ELECTRICAL CHARACTERISTICS (continued)

= +2.2V to +28V, T

= -40°C to +85°C, unless otherwise noted. Typical values are at V

= +5V and T

= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT

TIMING CHARACTERISTICS (Note 2)

Debounce Time t

INDBC

Time from V

UVLO

< V

OVLO

charge-pump enable

30 ms

ACOK Assertion Time t

ACOK

UVLO

< V

OVLO

, to ACOK low 30 ms

Switch Turn-On Time t

UVLO

< V

OVLO

, R

LOAD

= 100Ω,

from 10% to 90% of V

OUT

3ms

Switch Turn-Off Time t

OFF

< V

UVLO

or V

> V

OVLO

to internal

switch off, R

LOAD

= 100Ω

10 µs

Current-Limit Turn-Off Time t

BLANK

Overcurrent fault to internal switch off 10 µs

Autoretry Time t

RETRY

From overcurrent fault to internal switch

turn-on

30 ms

THERMAL PROTECTION

Thermal Shutdown T

SHDN

150 °C

Thermal-Shutdown Hysteresis 40 °C

ESD PROTECTION

Human Body Model ±15

IEC 61000-4-2 Air Gap ±15CD+ and CD-

IEC 61000-4-2 Contact ±6

All Other Pins Human Body Model ±2 kV

IN SUPPLY CURRENT

vs. IN VOLTAGE

MAX4987AE/BE toc01

IN SUPPLY CURRENT (μA)

210146

22 26

IN VOLTAGE (V)

MAX4987AE

100

120

140

160

180

200

-40 10-15 35 60 85

SWITCH ON-RESISTANCE

vs. TEMPERATURE

MAX4987AE/BE toc02

TEMPERATURE (°C)

(mΩ)

0.990

0.996

0.994

0.992

0.998

1.000

1.002

1.004

1.006

1.008

1.010

-40 10-15 356085

NORMALIZED UVLO THRESHOLD

vs. TEMPERATURE

MAX4987AE/BE toc03

TEMPERATURE (°C)

NORMALIZED UVLO THRESHOLD (V)

Typical Operating Characteristics

= +25°C, unless otherwise noted.)

1 2 3 4 5 6 7 8 9 10

MAX4987AE/MAX4987BE 1

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