RK818 datasheet(21/93 Pages) ROCKCHIP

номер детали	RK818

подробное описание детали	Input range: 3.8V - 6V for USB input 2.7V - 4.5V for BAT input

PDF	93 Pages

Scroll/Zoom	100%

производитель	ROCKCHIP [Rockchip Electronics Co., Ltd]

домашняя страница	http://www.rock-chips.com/a/en/index.html

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21 / 93 page

RK818 Datasheet

Rev 1.0

PARAMETERS

SYMBOL

CONDITION

MIN

TYP

MAX

UNIT

Rated output current

IMAX3

Reg90H<5:4>=<11

2.5

Switch Current Limit

ICL3

0.5A

step,

default=2.5A

3.5

Operating Quiescent Current,

No load, VDD=3.8V

IQ3

Minimum Switch Current Limit ICLMIN3

50mA

step,

default=150mA

400

Minimum ON Time

Ton3(min)

Soft-start Time

tSS3

Step=400us,

default=400us

400

800

COUT Discharge Switch ON

Resistance

RDIS3

250

ohm

Conversion

Efficiency

(Vin=3.8V,Vout=1.5V)

Iout=2.5A

Iout=2A

Iout=1.5A

Iout=1 A

Iout=500mA

Iout=100 mA

Iout=10 mA

CH4：BUCK DC-DC CONVERTER (BUCK4)

Input supply voltage range

VINPUT4

2.7

5.5

Voltage Adjustable Range, 4bit VFB4

Step=100mV

1.8

3.6

Feedback

Voltage,

Default( Tj=25

℃ )

VFB4(Default)

2.94

3.00

3.06

Feedback Voltage, Default(-

℃≦Tj≦+85℃)

VFB4(Default)

-2.91

3.00

3.09

Power Good threshold (Vout

rising)

VPG4

Output under voltage lockout

(Vout falling)

VUV4

Output over voltage lockout

(Vout rising)

VOV4

117

Load

Regulation,

IOUT4

100mA to 2.5A

0.1

%/A

Line Regulation, VCC4 = 3 to

5.5V, IOUT4 = 2A

0.1

%/V

Rated output current

IMAX4

Reg90H<7:6>=<11

2.5

Switch Current Limit

ICL4

0.5A

step,

default=3A

2.5

Operating Quiescent Current,

No load, VDD=3.8V

IQ4

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