RT7304 datasheet(6/14 Pages) RICHTEK

6 / 14 page

RT7304

DS7304-04 February 2015

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Electrical Characteristics

(VDD = 15V, TA = 25

°C, unless otherwise specification)

Absolute Maximum Ratings

(Note 1)



VDD to GND -----------------------------------------------------------------------------------------------------------------

−0.3V to 30V



GD to GND -------------------------------------------------------------------------------------------------------------------

−0.3V to 20V



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

−0.3V to 6V



Power Dissipation, PD @ TA = 25

°C

SOT-23-6 --------------------------------------------------------------------------------------------------------------------- 0.42W



Package Thermal Resistance (Note 2)

SOT-23-6,

θJA ---------------------------------------------------------------------------------------------------------------- 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)

HBM (Human Body Model) ----------------------------------------------------------------------------------------------- 2kV

MM (Machine Model) ------------------------------------------------------------------------------------------------------ 200V

Recommended Operating Conditions

(Note 4)



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



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



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

−40°C to 125°C

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

246.25

250

253.75

Maximum COMP Voltage

ICOMP < 30A

4.5

Maximum COMP Sourcing

Current

ICOMP(MAX) VCOMP < 3.5V

62.5

A

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