RT7276 datasheet(3/24 Pages) RICHTEK

3 / 24 page

RT7275/76

DS7275/76-00 January 2013

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

(VIN = 12V, TA = 25

°C, unless otherwise specified)

Electrical Characteristics

Recommended Operating Conditions

(Note 4)

Supply Input Voltage, VIN --------------------------------------------------------------------------------------- 4.5V to 18V

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

−40°C to 125°C

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

−40°C to 85°C

Absolute Maximum Ratings

(Note 1)

Supply Input Voltage, VIN, VINR (TSSOP-14 (Exposed Pad)) -----------------------------------------

−0.3V to 21V

Switch Node, SW -------------------------------------------------------------------------------------------------

−0.8V to (VVIN + 0.3V)

Switch Node, SW (<10ns)---------------------------------------------------------------------------------------

−5V to 25V

BOOT to SW -------------------------------------------------------------------------------------------------------

−0.3V to 6V

PVCC ----------------------------------------------------------------------------------------------------------------

−0.3V to 6V

PVCC to VIN (WDFN-10L 3x3) or VINR (TSSOP-14 (Exposed Pad)) ---------------------------------

−18V to 0.3V

Other Pins-----------------------------------------------------------------------------------------------------------

−0.3V to 21V

Power Dissipation, PD @ TA = 25

°C

TSSOP-14 (Exposed Pad) -------------------------------------------------------------------------------------- 2.50W

WDFN-10L 3x3 ----------------------------------------------------------------------------------------------------- 1.67W

Package Thermal Resistance (Note 2)

TSSOP-14 (Exposed Pad),

θJA -------------------------------------------------------------------------------- 40°C/W

WDFN-10L 3x3,

θJA ----------------------------------------------------------------------------------------------- 60°C/W

WDFN-10L 3x3,

θJC ----------------------------------------------------------------------------------------------- 7.5°C/W

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

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Supply Current

Supply Current (Shutdown)

VEN = 0V

μA

Supply Current (Quiescent)

VEN = 3V, VFB = 1V

0.7

Logic Threshold

Logic High

VIH

EN Voltage

Logic Low

VIL

0.4

VFB Voltage and Discharge Resistance

Feedback Threshold Voltage

VFB_TH

4.5V

≤ VIN ≤ 18V

0.757 0.765 0.773

Feedback Input Current

IFB

VFB = 0.8V

−0.1

0.1

μA

VOUT Discharge Resistance

RDIS

VEN = 0V, VVOUT = 0.5V

100

PVCC Output

PVCC Output Voltage

VPVCC

≤ VIN ≤ 18V, 0 < IPVCC < 5mA

4.7

5.1

5.5

PVCC Line Regulation

≤ VIN ≤ 18V, IPVCC = 5mA

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