RT7296C datasheet(5/13 Pages) RICHTEK

5 / 13 page

RT7296C

is a registered trademark of Richtek Technology Corporation.

DS7296C-00

May

2015

www.richtek.com

Absolute Maximum Ratings

(Note 1)



Supply Input Voltage, VIN

--------------------------------------------------------------------------------------------- 0.3V to 20V



Switch Voltage, SW

------------------------------------------------------------------------------------------------------ 0.3V to VIN + 0.3V



BOOT to SW, VBOOT – SW --------------------------------------------------------------------------------------------- 0.3V to 6V



Other Pins

------------------------------------------------------------------------------------------------------------------- 0.3V to 6V



Power Dissipation, PD @ TA = 25C

TSOT-23-8 (FC)

---------------------------------------------------------------------------------------------------------- 1.428W



Package Thermal Resistance

(Note 2)

TSOT-23-8 (FC),

JA --------------------------------------------------------------------------------------------------- 70C/W

TSOT-23-8 (FC),

JC --------------------------------------------------------------------------------------------------- 15C/W



Lead Temperature (Soldering, 10 sec.)

--------------------------------------------------------------------------- 260C



Junction Temperature

--------------------------------------------------------------------------------------------------- 40C to 150C



Storage Temperature Range

----------------------------------------------------------------------------------------- 65C to 150C



ESD Susceptibility

(Note 3)

HBM (Human Body Model)

------------------------------------------------------------------------------------------- 2kV

Recommended Operating Conditions

(Note 4)



Supply Input Voltage, VIN --------------------------------------------------------------------------------------- 4.5V to 17V



Junction Temperature Range

---------------------------------------------------------------------------------------- 40C to 125C



Ambient Temperature Range

---------------------------------------------------------------------------------------- 40C to 85C

Electrical Characteristics

(VIN = 12V, TA = 25C, unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Shutdown Supply Current

VEN = 0V

A

Quiescent Current with no Load

at DCDC Output

VEN = 2V, VFB = 1V

0.8

Feedback Voltage

VFB

0.799

0.807

0.815

Feedback Current

IFB

VFB = 820mV

Switch

On-Resistance

High-Side

RDS(ON)H



Low-Side

RDS(ON)L

Switch Leakage

VEN = 0V, VSW = 0V

A

Current Limit

ILIM

Under 40% duty-cycle

4.2

Low-Side Switch Current Limit

From Drain to Source

Oscillation Frequency

fOSC

VFB = 0.75V

1100

1400

1700

kHz

SYNC Frequency Range

fSYNC

300

3000

kHz

Fold-Back Frequency

VFB < 400mV

125

kHz

Maximum Duty-Cycle

DMAX

VFB = 0.7V

Minimum On-Time

tON

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