RT9741 datasheet(3/11 Pages) RICHTEK

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RT9741

DS9741-01 March 2015

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

Absolute Maximum Ratings (Note 1)



Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------- 6V



Power Dissipation, PD @ TA = 25

°C

SOT-23-3 -------------------------------------------------------------------------------------------------------------------- 0.41W



Package Thermal Resistance (Note 2)

SOT-23-3,

θJA --------------------------------------------------------------------------------------------------------------- 243.3°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

Recommended Operating Conditions

(Note 4)



Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------- 2.7V to 5.5V



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

−40°C to 125°C



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

−40°C to 85°C

Electrical Characteristics

(VIN = 5V, CIN = 1

μF, COUT = 10μF, TA = 25°C, unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Input Quiescent Current

Switch On, VOUT = Open

A

Switch On-

Resistance

RT9741A

RDS(ON)

VIN = 5V, IOUT = 1.3A

100

120



RT9741C

VIN = 5V, IOUT = 0.6A

120

140

Current Limit

RT9741A

ILIM

VOUT = 4V

1.5

RT9741C

0.7

Short Current

RT9741A

ISC_FB

VOUT = 0V, Measured Prior

to Thermal Shutdown

1.4

RT9741C

0.7

Output Turn-On Rising Time

TON_RISE 10% to 90% of VOUT Rising

200

s

Under-Voltage Lockout

VUVLO

VIN Rising

1.3

1.7

2.1

Under-Voltage Hysteresis

VUVLO

VIN Decreasing

0.1

Thermal Shutdown Protection

TSD

VOUT > 1V

120

C

VOUT = 0V

100

Thermal Shutdown Hysteresis

TSD

VOUT = 0V

C

Note 1.

Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are

stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the

operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect

device reliability.

Note 2.

θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7.

Note 3.

Devices are ESD sensitive. Handling precaution is recommended.

Note 4.

The device is not guaranteed to function outside its operating conditions.

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