RT8205A/B/C

12

DS8205A/B/C-06 July 2012

www.richtek.com

©

Copyright 2012 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.

measured at the exposed pad of the package.

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.

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

VOUT Discharge

VOUTx Discharge Current

10

60

--

mA

Logic Input

Low Level (Internal Fixed VOUTx)

--

--

0.2

V

FB1/FB2 Input Voltage

High Level (Internal Fixed VOUTx)

4.5

--

--

V

Low Level (PWM Mode)

--

--

0.8

V

REF Level (DEM Mode)

1.8

--

2.3

V

SKIPSEL Input Voltage

High Level (Ultrasonic Mode)

2.5

--

--

V

ENTRIPx Input Voltage

SMPS On Level

0.35

0.4

0.45

V

Logic-High

1

--

--

EN Threshold

Voltage

Logic-Low

--

--

0.4

V

--

--

0.8

1.8

--

2.3

TONSEL Setting Voltage

2.5

--

--

V

EN = 0V or 25V

−1

--

3

TONSEL, SKIPSEL = 0V or 5V

−1

--

1

Input Leakage Current

FBx = SECFB = 0V or 5V

−1

--

1

μA

Internal BOOT Switch

Internal Boost Charging

Switch On-Resistance

VREG5 to BOOTx

--

20

--

Ω

Power MOSFET Drivers

UGATEx Driver Sink/Source

Current

UGATEx Forced to 2V

--

2

--

A

LGATEx Driver Source

Current

LGATEx Forced to 2V

--

1.7

--

A

LGATEx Driver Sink Current

LGATEx Forced to 2V

--

3.3

--

A

UGATEx On-Resistance

BOOTx to PHASEx Forced to 5V

--

1.5

4

Ω

LGATEx, High State

--

2.2

5

LGATEx On-Resistance

LGATEx, Low State

--

0.6

1.5

Ω

LGATEx Rising

--

30

--

Dead Time

UGATEx Rising

--

40

--

ns