PH

VIN

GND

BOOT

VSENSE

COMP

TPS55010

EN

RT/CLK

SS

FAULT

C

ss

R

t

C

C

C

boot

T1

C

IN

3 V

to

5.5 V

+

V

O

_

1:2.5

C

O

C

PRI

R

LS

R

HS

5 V

200mA

R

C

0

10

20

30

40

50

60

70

80

90

100

0.00

0.05

0.10

0.15

0.20

0.25

0.30

Output Current (A)

G040

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TPS55010

SLVSAV0B – APRIL 2011 – REVISED OCTOBER 2014

TPS55010 2.95-V To 6-V Input, 2 W, Isolated DC/DC Converter with Integrated FETs

1 Features

3 Description

The TPS55010 is a transformer driver designed to

1

•

Isolated Fly-Buck™ Topology

provide isolated power for isolated interfaces, such as

•

Primary Side Feedback

RS-485 and RS-232, from 3.3 V or 5 V input supply.

•

100 kHz to 2000 kHz Switching Frequency

The device uses fixed frequency current mode control

•

Synchronizes to External Clock

and half bridge power stage with primary side

•

Adjustable Slow Start

feedback to regulate the output voltage for power

levels

up

to

2W.

The

switching

frequency

is

•

Adjustable Input Voltage UVLO

adjustable from 100 kHz to 2000 kHz so solution size,

•

Open Drain Fault Output

efficiency and noise can be optimized. The switching

•

Cycle-by-Cycle Current Limit

frequency is set with a resistor or is synchronized to

external clock using the RT/CLK pin. To minimize

•

Thermal Shutdown Protection

inrush currents, a small capacitor can be connected

•

3 mm x 3 mm 16 Pin QFN Package

to the SS pin. The EN pin can be used as an enable

pin or to increase the default input UVLO voltage

2 Applications

from 2.6V.

•

Noise Immunity in PLCs, Data Acquisition and

With the same transformer the TPS55010 can

Measurement Equipment

provide a solution for different input and output

•

Isolated RS-232 and RS-485 Communication

voltage combinations by adjusting the primary side

Channels

voltage. Off the shelf transformers are available to

provide single positive, or dual positive and negative

•

Powers Line Drivers, ISO Amplifiers, Sensors,

output voltages.

CAN Transceivers

The TPS55010 is available in a 3mm x 3mm 16 pin

•

Floating Supplies for IGBT Gate Drivers

QFN package with thermal pad.

•

Promotes Safety in Medical Equipment

Device Information (1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS55010

WQFN (16)

3.00 mm × 3.00 mm

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

end of the datasheet.

4 Simplified Schematic

Efficiency vs Load Current

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.