RT8474A

5

DS8474A-05 April 2015

www.richtek.com

©

Copyright

2015 Richtek Technology Corporation. All rights reserved.

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. If connected with a 20k

Ω serial resistor, PWM can go up to 40V.

Note 3.

measured at the exposed pad of the package.

Note 4. Devices are ESD sensitive. Handling precaution is recommended.

Note 5. The device is not guaranteed to function outside its operating conditions.

Note 6. Guarantee by design, not subject to production testing.

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

PWM Converter

Switch Frequency

440

500

540

kHz

Maximum Duty Cycle

--

--

100

%

Minimum On-Time

--

100

200

ns

--

0.15

--



SW Current Limit

2

2.5

--

A

Over-Voltage Protection and Soft-Start

OVP Threshold

1.15

1.2

1.25

V

OVP Recovery

--

1

--

V

OVP Input Current

--

30

--

A

Soft-Start Time

(Note 6)

--

5.7

--

ms

Over-Temperature Protection

Thermal Shutdown Threshold

--

150

--

C

Thermal Shutdown Hysteresis

T

SD

--

20

--

C