BST2

LX2

PGND2

VIN2

SW_IN

SW_OUT

FB2

COMP2

COMP1

FB1

BST1

LX1

PGND1

VIN1

V7V

PGOOD1

nFAULT

SW_EN

EN2

EN1

PGOOD2

VIN

PGOOD2

nFAULT

19

20

21

22

23

24

6

18

13

14

12

11

10

9

8

7

Vout1

Vout2

VIN

DVCC

TPS65283

TPS65283-1

PGOOD1

Vswout

5

1

2

3

17

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

0.002

0.02

0.2

2

Loading (A)

Buck2 at 5 V

Buck1 at 1.2 V

C001

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

TPS65283, TPS65283-1

SLVSCL3C – JUNE 2014 – REVISED AUGUST 2014

TPS65283/-1 4.5- to 18-V Input Voltage, Maximum 3.5-A/2.5-A Current, Synchronous Dual

Buck Converter With Power Distribution Switch

1 Features

2 Applications

1

•

Buck Converter

•

USB Ports and Hubs

•

Set Top Box

–

Wide Input Voltage Range 4.5 to 18 V

•

Digital TV

–

Integrated Dual Buck Converter, Maximum

Continuous Current 3.5 A (Buck1) / 2.5 A

•

DSL/Cable Modem, Wireless Router

(Buck2)

•

Home Gateway and Access Point Networks

–

Feedback Reference Voltage 0.6 V ±1%

•

Car Infotainment

–

Adjustable Switching Frequency 200 kHz to

2 MHz

3 Description

–

Internal Built Soft Start Time 2.4 ms

The TPS65283, TPS65283-1 in thermally-enhanced

4-mm × 4-mm VQFN package is a full featured

–

External Clock Synchronization

4.5-

to

18-V

Vin,

3.5-A/2.5-A

output

current

–

Cycle-by-Cycle Current Limit

synchronous step down DC-DC converter, which is

–

Power Good Indicator for Each Buck

optimized for small designs through high efficiency

and integrating the high-side and low-side MOSFETs.

–

Continuous Current Mode (TPS65283) or

The

device

also

incorporates

one

N-channel

Pulse Skipping Mode (PSM) (TPS65283-1) at

MOSFET power switches for power distribution

Light Load

systems.

This

device

provides

a

total

power

•

Power Distribution Switch

distribution solution, where precision current limiting

and fast protection response are required.

–

Integrated a Power Distribution Switch With

On-Resistance 60 m

Ω

Device Information(1)

–

Operating Input Voltage Range 2.4 to 6 V

PART NUMBER

PACKAGE

BODY SIZE (NOM)

–

Adjustable Current Limiting from 100 mA to

TPS65283

2.7 A

VQFN (24)

4.00 mm × 4.00 mm

TPS65283-1

–

Current-Limit Accuracy ±10% at 1.25 A

(1) For all available packages, see the orderable addendum at

(Typical)

the end of the data sheet.

–

Auto Recovery Overcurrent Protection

–

Reverse Input to Output Voltage Protection

–

Overtemperature Protection

–

24-Lead VQFN (RGE) 4-mm × 4-mm Package

4 Typical Schematic

Efficiency, Vin = 12 V, PSM

1

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.