ROHS TS2576 Technical data

TS2576

3A / 52KHz Buck Switching Regulator

1/8 Version: A07

TO-220-5L

TO-263-5L

(D2PAK)

General Description

TS2576 Series are step-down switching regulators with all required active functions. It is capable of driving 3A load
with excellent line and load regulations. These devices are available in fixed output voltages of 3.3V, 5V and
adjustable output version.
TS2576 series operates at a switching frequency of 52kHz thus allowing smaller sized filter components than what
would be needed with lower frequency switching regulators. It substantially not only reduces the area of board size
but also the size of heat sink, and in some cases no heat sink is required. The ±4% tolerance on output voltage within
specified input voltages and output load conditions is guaranteed. Also, the oscillator frequency accuracy is within
±10%. External shutdown is included. Featuring 70µA (typical) standby current. The output switch includes cycle-by­cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

Ordering Information

Part No.

Package

Packing

TS2576CZ5xx C0

TO-220-5L

50pcs / Tube

TS2576CM5xx RN

TO-263-5L

800pcs / 13” Reel
Note: Where xx denotes voltage option, available are

50= 5.0V
33= 3.3V

Leave blank for adjustable version

Features

● Output Voltage: 3.3V, 5V & Adjustable version

● Adjustable Output Voltage Range 1.23V~37V ±4%

● 52kHz fixed switching frequency

● Voltage Mode Non-synchronous PWM control

● Thermal Shutdown and Current Limit Protection

● ON/OFF Shutdown Control Input

● High Efficiency

● Short Circuit Protect (SCP)

● Operating Voltage Can be up to 40V

● Output Load Current 3A

● Low Power Standby Mode

● P+ Product Enhancement Tested

Application

● Simple High-efficiency Step down Regulator

● On-Card Switching Regulators

● Positive to Negative Converter

Absolute Maximum Rating

Parameter

Symbol

Limit

Unit

Maximum Supply Voltage

VCC

+45

V

Recommend Operating Supply Voltage

VOP

4.5 to 40

V

SW, EN Pin Input Voltage

VSW, VEN

-0.3 to +25

V

Feedback Pin Voltage

VFB

-0.3 to +25

V

Power Dissipation

PD

Internally Limited

W

Output Voltage to Ground

V

OUT

-1

V

Storage Temperature Range

TST

-65 to +150

o

C

Operating Temperature Range

TOP

-40 to +125

o

C

ESD Susceptibility (HBM)

2 kV

Pin Definition:

1. Input

2. SW Output

3. Ground

4. Feedback

5. Enable

TS2576

3A / 52KHz Buck Switching Regulator

2/8 Version: A07

Thermal Information

Parameter

Symbol

Maximum

Unit

TO-220-5L

2

Thermal Resistance (Junction to Case)

TO-263-5L

ӨJC

2

o

C/W

TO-220-5L

65 (note 1)

Thermal Resistance (Junction to Ambient)

TO-263-5L

Ө

JA

50 (note 2)

o

C/W

Note1: ӨJA is measured on the PCB with minimum copper area.
Note2: ӨJA is measured with the PCB copper area (need connect to GROUND pins) of approximately 0.5 in2

Electrical Specifications (All Output Voltage Version)

(Ta = 25oC unless otherwise noted, VIN=12V for 3.3V, 5V, Adjustable version. I

LOAD

=0.5A)

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Output Feedback

VFB

4.5V≤ V

IN

≤40V

0.2A≤ I

LOAD

≤3A

1.180

1.23

1.280

V

Efficiency

ADJ

η

V

IN

=12V, I

LOAD

=3A

--

75

--

%

Output Feedback

VFB

4.75V≤ V

IN

≤40V

0.2A≤ I

LOAD

≤3A

3.135

3.3V

3.465

V

Efficiency

3.3V

η

V

IN

=12V, I

LOAD

=3A

--

75

--

%

Output Feedback

VFB

7V≤ V

IN

≤40V

0.2A≤ I

LOAD

≤3A

4.75

5

5.25

V

Efficiency

5V

η

V

IN

=12V, I

LOAD

=3A

--

77

--

%

Feedback Bias Current

IFB

V

OUT

= 5V (Adjustable Version)

--

50

100

nA

Oscillator Frequency

F

OSC

47

52

58

KHz

Soft-Start Time

TSS

Rising edge of EN on to ICL

-- 3 --

mS

Current Limit

ICL

Pear Current, no outside circuit
VFB =0V force driver on

5.9

--

--

A

Saturation Voltage

V

SAT

I

OUT

=3A, No outside circuit

VFB =0V force driver on

--

1.4

1.8

V

VIL

Low (regulator ON)

--

1.2

1.0

ON/OFF Pin Logic Input Threshold
Voltage

VIH

High (regulator OFF)

2.2

1.4

--

V

IL

V

LOGIC

=5V (OFF)

--

12

30

ON/OFF Pin Logic Input Current

IH

V

LOGIC

=0V (ON)

-- 0 10

µA

Maximum Duty Cycle (ON)

VFB =0V force driver on

93

98

--

Maximum Duty Cycle (OFF)

DC

VFB =12V force driver off

-- 0 --

%

Quiescent Current

IQ

VFB =12V force driver off

-- 5 10

mA

ON/OFF pin=5V

--

200

Standby Quiescent Current

I

STBY

VIN =40V

--

70

250

µA

SW pin = 0

No outside circuit,
VFB =12V force driver off

--

0.3 2 mA

SW Pin Leakage
Current

SW pin = -1

I

SWL

VIN =12V

--

7.5

30

mA

TS2576

3A / 52KHz Buck Switching Regulator

3/8 Version: A07

Block Diagram