Rainbow-electronics MAX8982X Manual do Utilizador descarregar pdf (Página 16)

Power-Management ICs for

ICERA E400/E450 Platform

MAX8982A/MAX8982X

OUT8 (LDO8) ELECTRICAL CHARACTERISTICS

(MAX8982A only, V

IN4

= V

IN1_

= +5.0V, C

IN4

= 1.0FF, C

REFBP

= 0.1FF, C

OUT8

= 1FF, T

= -40NC to +85NC, unless otherwise noted.

Typical values are at T

= +25NC.) (Note 3)

OUT9 (LDO9) ELECTRICAL CHARACTERISTICS

(MAX8982A/MAX8982X: V

IN3

= V

BUCK2

= 1.8V, C

IN3

= 2.2FF, C

REFBP

= 0.1FF, C

OUT9

= 2.2FF, T

= -40NC to +85NC, unless other-

wise noted. Typical values are at T

= +25NC.) (Note 3)

PARAMETER CONDITION MIN TYP MAX UNITS

Input Operating Range Guaranteed by output voltage accuracy 3.0 5.5 V

Overvoltage Lockout

(Shutdown LDO8 Output)

IN4

rising, V

IN1_

= V

IN4

5.75 5.93 V

Overvoltage Hysteresis 250 mV

Default Output Voltage I

LOAD

= 50mA 2.91 3.00 3.09 V

Maximum Output Current 150 mA

Current Limit (Note 4) V

OUT8

= 90% of its regulation 165 360 650 mA

Dropout Voltage (Note 4) 100mA, T

= +85NC 150 300 mV

Line Regulation 3.4V P V

IN4

P 5.5V, V

OUT8

= 3.1V, I

LOAD

= 100mA 2.2 mV

Load Regulation 50FA < I

LOAD

< 150mA 25 mV

Power-Supply Rejection

OUT

/DV

f = 10Hz to 10kHz, I

LOAD

= 30mA 60 dB

Output Noise Voltage (RMS) 100Hz to 100kHz, I

LOAD

= 30mA 45 FV

RMS

Programmable Output Voltage I

LOAD

= 50mA

3.00

3.10

3.20

3.30

Startup Time from Shutdown

(Note 4)

LOAD

= 150mA 100 Fs

Startup Transient Overshoot

(Note 4)

LOAD

= 150mA 50 mV

Shutdown Output Impedance

(Active Discharge Resistance)

C programmable, default off 100

PARAMETER CONDITION MIN TYP MAX UNITS

Default Output Voltage ±I

LOAD

= 10mA, V

IN3

1.8V 0.873 0.900 0.927 V

Maximum Output Current 50 mA

Current Limit (Note 4) V

OUT9

= 90% of its regulation 55 120 220 mA

Load Regulation 50FA < I

LOAD

< 50mA 25 mV

Power-Supply Rejection

OUT

/DV

f = 10Hz to 10kHz, I

LOAD

= 10mA 60 dB

Output Noise Voltage 100Hz to 100kHz, I

LOAD

= 10mA 45 FV

RMS

Programmable Output Voltage I

LOAD

= 10mA

0.80

0.90

1.00

1.10

1.20

Startup Time from Shutdown

(Note 4)

LOAD

= 50mA 100 Fs

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 72 73

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