CS902-A-R datasheet(9/15 Pages) RICHTEK

9 / 15 page

Conceptual

CS902-A-R

www.richtek.com

June 13, 2013

Conf

ident

ial

for

CSO

SYNC-BOOST CONVERTER (AVDD)

LXO Regulation Voltage Range

VLXO

HVS=0, programmable step 0.1V

13.5

19.8

LXO Regulation Voltage

Tolerance

-1%

+1%

HVS Voltage

VHVS

Programmable step 0.2V

Low Side LX On-Resistance

RDS(ON)

ILX = 500 mA.

100

Ω

Low Side LX Current Limit

ILIM

4.25

5.75

Low Side LX Current Limit

negative offset

current limit value=

Ityp - offset register value x 0.4(A)

2.8

Switch Leakage Current

Ileak

VLX = 16.5 V

Soft-start time

LXI Over-Voltage Protection

VOVP

VLXI rising, hysteresis = 1.5V

20.5

21.5

22.5

LXO Line Regulation

≤ V

≤ 14V, I

out = 1mA

±0.08

%/V

LXO Load Regulation

1mA

≤ I

out

≤ 2A

±1

%/A

Trans-Conductance of Error

Amplifier

240

uA/V

Gain of Error Amplifier

1000

V/V

LXO Fault Trip Level

VLXO falling

High Side LX On-Resistance

RDS(ON)

ISW = 0.2A.

400

Ω

ISW

≥ 2.5A.

1.5

Short-Circuit Trigger Duration

ISW

≥ 4.5A.

100

BUCK1 CONVERTER (VI/O)

OUTB1 Regulation Voltage

Range

VOUTB1

Programmable step 0.1V

2.2

3.7

OUTB1 Regulation Voltage

Tolerance

Iload = 10mA

-2%

+2%

LXB1 to VINB1 N-MOSFET

On-Resistance

RDS(ON)

ILXB1 = 500 mA

150

Ω

LXB1 Positive Current Limit

ILIM

3.0

3.5

4.0

LXB1 to PGND N-MOSFET

On-Resistance

Ω

OUTB1 Line Regulation

≤ V

≤ 14V, I

out = 1mA

0.005

%/V

OUTB1 Load Regulation

1mA

≤ I

out

≤ 2.5A

0.25

%/A

Soft Start Period

TSS

OUTB1 Fault Trip Level

VOUTB1 falling

POSITIVE CHARGE PUMP CONTROLLER (VGH)

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