RT9073 datasheet(5/14 Pages) RICHTEK

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RT9073

DS9073-02 March 2015

www.richtek.com

is a registered trademark of Richtek Technology Corporation.

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.

Note 5.

The dropout voltage is defined as VIN

− VOUT, when VOUT is 98% of the normal value of VOUT.

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Shutdown GND Current

VEN = 0V

0.1

0.5

A

Shutdown Leakage Current

VEN = 0V, VOUT = 0V

0.1

0.5

A

EN Input Current

IEN

VEN = 5.5V

0.1

A

Line Regulation

LINE

ILOAD = 10mA

1.2V

 VIN  1.5V

0.6

1.5V

 VIN  1.8V

0.3

1.8V

 VIN  2.1V

0.1

2.1V

 VIN  5.5V

0.15

Load Regulation

LOAD

5mA < ILOAD < 250mA

Power Supply Rejection

Ratio

PSRR

VIN = 3V, ILOAD = 50mA,

COUT = 1F, VOUT = 2.5V, f = 1kHz

Output Voltage Noise

COUT = 1F,

ILOAD = 30mA,

BW = 10Hz to

100kHz,

VIN = VOUT + 2V

VOUT = 0.9V

VRMS

VOUT = 1.2V

VOUT = 1.8V

VOUT = 3.3V

Output Current Limit

ILIM

Peak output current

260

350

500

Fold-Back Current Limit

VOUT = 0.5V x VOUT(normal)

150

270

390

Enable Input

Voltage

Logic-High

VIH

VIN = 5V

1.2

Logic-Low

VIL

VIN = 5V

0.4

Thermal Shutdown

Temperature

TSD

ILOAD = 30mA, VIN  1.5V

150

C

Thermal Shutdown

Hysteresis

TSD

C

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