RT7310 datasheet(6/12 Pages) RICHTEK

6 / 12 page

RT7310

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS7310-00

October

2014

Absolute Maximum Ratings

(Note 1)



VDD Supply Voltage, VDD ----------------------------------------------------------------------------------------- −0.3V to 30V



GD to GND Voltage, VGD ------------------------------------------------------------------------------------------ −0.3V to 20V



CS, ZCD, COMP to GND Voltage -------------------------------------------------------------------------------

−0.3V to 6V



Power Dissipation, PD @ TA = 25°C

SOT-23-6 --------------------------------------------------------------------------------------------------------------

0.42W



Package Thermal Resistance

(Note 2)

SOT-23-6,

JA-------------------------------------------------------------------------------------------------------- 235.6°C/W



Junction Temperature-----------------------------------------------------------------------------------------------

150°C



Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------

260°C



Storage Temperature Range--------------------------------------------------------------------------------------

−65°C to 150°C



ESD Susceptibility

(Note 3)

Human Body Model -------------------------------------------------------------------------------------------------

2kV

Machine Model -------------------------------------------------------------------------------------------------------

200V

Recommended Operating Conditions

(Note 4)



Supply Input Voltage, VDD ----------------------------------------------------------------------------------------- 12V to 25V



COMP Voltage, VCOMP --------------------------------------------------------------------------------------------- 0.7V to 4.3V



Ambient Temperature Range -------------------------------------------------------------------------------------

−40°C to 85°C



Junction Temperature Range -------------------------------------------------------------------------------------

−40°C to 125°C

Electrical Characteristics

(VDD = 15V, TA = 25°C, unless otherwise specification)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

VDD Supply Current and Protections Section

VDD OVP Threshold Voltage

VOVP

25.5

28.5

VDD OVP De-bounce Time

(Note 5)

s

Rising UVLO Threshold Voltage

VTH_ON

Falling UVLO Threshold Voltage

VTH_OFF

Operating Supply Current

IDD_OP

IZCD = 0, GD open

3.5

Start-up Current

VDD = VTH_ON  1V

A

ZCD Section

Lower Clamp Voltage

IZCD = 0 to 2.5mA

0.3

ZCD OVP Threshold Voltage

VZCD_OVP

At the knee point

(Note 5)

2.8

3.1

3.4

Constant Current Control Section

Regulated factor for

Constant-Current Control

KCC

0.245

0.25

0.255

Maximum COMP Voltage

ICOMP < 30A

4.5

Maximum COMP Sourcing Current

ICOMP(MAX) VCOMP < 3.5V

62.5

A

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