Samsung RL37Lx Manual do Utilizador descarregar pdf (Página 13)

Confidential MAX8698C, Rev08

Page 13/47

DO NOT COPY. DO NOT DISTRIBUTE 12/8/2009

LDO4 Electrical Characteristics

Operating conditions (unless otherwise specified) V

IN1

to V

IN6

+3.7V, C

BATT+ΣIN_

=20μF, C

REFBP

= 100nF, T

=-40°C to +85°C

PARAMETER CONDITIONS MIN TYP MAX UNITS

Input voltage range

2.7 5.5 V

Default output voltage LDO4

1mA@ V

IN4

+5.5V

300mA@ V

IN4

3.4V

-3% 1.8

+3% V

Programmable Output Voltage

IN1

to V

IN6

+4.2V

LDO4

=150mA

-3%

1.6

1.7

1.8

1.9

2.0

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

3.0

3.1

3.2

3.3

3.4

3.5

3.6

+3% V

Output current 450 mA

Current limit LDO4 short to GND 460 820 1400 mA

Drop-out voltage

LDO4

=200mA , T

=25°C

120 400 mV

Line regulation

3.4V≤V

IN4

≤5.5V, I

LDO4

=150mA,

LDO4

3.0V

2.4 mV

Load regulation 50µA < I

LDO4

< 450mA 25 mV

Ground current (Note1) I

LDO4

=500µA 21 µA

Output capacitor for stable

operation (Note1)

0μA < I

LDO4

< 450mA

MAX ESR = 100mΩ

1.4 2.2 µF

Start up time from shutdown

(Note1)

LDO4

= 2.2µF, I

LDO4

= 300mA 40 100 µs

Start-up transient overshoot

(Note1)

LDO4

= 2.2µF, I

LDO4

= 300mA 3 50 mV

Power Supply Reject

ΔLDO4/ΔV

IN4

f=10Hz-10kHz,

LDO4

= 2.2µF,I

LDO4

=30mA

60 dB

Output Noise Volt. (RMS)

100Hz-100kHz, C

LDO4

= 2.2µF,

LDO4

=30mA

80 µV

RMS

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 46 47

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