Rainbow-electronics MAX8620 Manual de usuario descargar pdf (Pagina 3)

MAX8620Y

µPMIC for Microprocessors or DSPs

in Portable Equipment

_______________________________________________________________________________________ 3

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

OUT1, OUT2 Power-Supply

Rejection Ratio

f = 10Hz to 10kHz, C

OUT_

= 4.7µF,

LOAD_

= 30mA

60 dB

f = 100Hz to 100kHz, C

OUT_

= 4.7µF,

LOAD_

= 30mA

Output Noise Voltage

f = 100Hz to 100kHz, C

OUT_

= 4.7µF,

LOAD_

= 30mA, C

open

100

µV

RMS

STEP-DOWN CONVERTER (OUT3)

Output Voltage Range V

OUT3

0.6 3.3 V

FB Threshold Voltage V

falling 0.6 V

FB Threshold Line Regulation V

IN1

= V

IN2

= 2.7V to 5.5V (Note 2) 0.08 %/V

= +25°C -2 +2

FB Threshold Voltage Accuracy

(Falling) (% of V

)

OUT3

= 0mA

= -40°C to +85°C -3 +3

FB Threshold Voltage Hysteresis

(% of V

)

HYS

OUT3 disabled 10

FB Bias Current I

= 0.5V 10

µA

LIM3P

pFET switch 675 950 1200

Current Limit

LIM3N

nFET rectifier 875 1000 1200

ONP

pFET switch, I

= -200mA 0.65 1.5

On-Resistance

ONN

nFET rectifier, I

= +200mA 0.35 0.8

Ω

Rectifier-Off Current Threshold I

LXOFF

30 60 mA

107

Minimum On- and Off-Times

OFF

OPEN-DRAIN, ACTIVE-LOW RESET OUTPUT (RESET)

RESET Output-Voltage Low V

SINK

= 500µA 0.3 V

RESET Output Leakage Current V

RESET

= 5.5V 100 nA

RESET Threshold Voltage V

THR

Percent of the OUT1 regulation voltage

(Note 4)

84 87 90 %

RESET Timeout Period t

Figure 4 30 60 ms

LDO OUTPUT-VOLTAGE SELECT INPUTS (SEL1, SEL2)

SEL_ Input Low Threshold 1V

SEL_ Input High Threshold V

IN_

- 0.2V V

SEL_ Input Bias Current

IN1

= V

IN2

= 4.2V, V

SEL1

= 0V or V

IN1

SEL2

= 0V or V

IN1

±0.1 µA

ELECTRICAL CHARACTERISTICS (continued)

IN1

= V

IN2

= +3.7V, C

= 10µF, C

= 0.01µF, T

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

= +25°C.)

(Note 1)

Note 1: Specifications are 100% production tested at T

= +25°C. Maximum and minimum limits over temperature are guaranteed

by design and characterization.

Note 2: After startup.

Note 3: Guaranteed by design.

Note 4: RESET asserts low when V

OUT1

drops below the specified percent of the OUT1 regulation voltage.

1 2 3 4 5 6 7 8 ... 17 18

MAX8620Y 1

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Rainbow-electronics MAX8620 Manual de usuario Pagina 3

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