RT9645PQV datasheet(7/13 Pages) RICHTEK

Part #	RT9645PQV

Description	5 Channels ACPI Regulator

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Manufacturer	RICHTEK [Richtek Technology Corporation]

Direct Link	http://www.richtek.com

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RT9645

Preliminary

7

DS9645-00

August 2007

www.richtek.com

Parameter

Symbol

Test Condition

Min

Typ

Max

Units

Oscillator and Soft-Start

PW M Frequency

fOSC

265

300

345

kHz

Ramp Amplitude

ΔVOSC

--

1.2

--

V

Ramp Offset

VOSC_OS

--

0.9

--

V

Soft-Start Interval

TSS

4

8

--

ms

Reference Voltage

Reference Voltage VREF

VREF

0.784

0.8

0.816

V

VDDQ PWM1 Controller

UGATE Source

IUGATEsc

VBOOT −VPHASE = 12V;

VUGATE − VPHASE = 6V

0.5

1

--

A

UGATE Sink

RUGATEsk

VBOOT −VPHASE = 12V;

VUGATE − VPHASE = 1V

--

4

8

Ω

LGATE Source

ILGATEsc VPVIN = 12V; VLGATE = 6V

0.5

1

--

A

LGATE Sink

RLGATEsk VPVIN = 12V; VLGATE = 1V

--

3

5

Ω

OC Current Source

IOC1

VISNS = 0V

34

40

46

μA

Under Voltage Lockout

VUV1

--

75

--

%

COMP1 Enable Threshold

VEN1

0.1

0.2

--

V

PWM2 Controller

OC current source

IOC2

VISNS2 = 0V

34

40

46

μA

Under Voltage Lockout

VUV2

--

75

--

%

SS2/EN2 Source Current

ISS2

VSS2/EN2 = 0V

--

5

--

μA

Enable Threshold

VEN2

--

0.5

--

V

UV Protection Enable Threshold

VPT_EN2 VDD = 5V

--

3.6

--

V

FSB _VTT Regulator

External Gate Driver

VOH3

VPVIN = 12V

10.5

--

V

Gate Source Current

ISC3

VVTT_DRV = 3V

--

4

--

mA

Gate Sink Current

ISK3

VVTT DRV = 0.6V

15

22

--

mA

Under Voltage Lockout

VUV3

--

75

--

%

3VSB Regulator

Regulated Voltage

V3VSB

3.2

3.3

3.4

V

Source Current

ISC4

30

40

--

mA

OC Current

IOC4

40

80

--

mA

Under Voltage Lockout

VUV4

--

75

--

%

Others

S3, S5 High Input Threshold

VIL

--

0.75

V

S3, S5 Low Input Threshold

VIH

2.2

--

V

Thermal Shutdown Limit

TSHDN

--

140

--

°C

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