TS2509 Taiwan Semiconductor Company, TS2509 Datasheet

TS2509

Manufacturer Part Number

TS2509

Description

3A / 500KHz PWM Buck Converter

Manufacturer

Taiwan Semiconductor Company

Datasheet

1.TS2509.pdf (9 pages)

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General Description

TS2509 consists of step-down switching regulator with PWM control. These devise include a reference voltage

source, oscillation circuit, error amplifier, internal PMOS and etc. TS2509 provides low-ripple power, high efficiency,

and excellent transient characteristics. The PWM control circuit is able to the duty ratio linearly form 0 up to 100%.

This converter also contains an error amplifier circuit as well as a soft-start circuit that prevents overshoot at startup.

An enable function, an over current protect function and short circuit protect function are built inside, and when OCP

or SCP happens, the operation frequency will be reduced. Also, an internal compensation block is built in to minimum

external component count. With the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode

connected externally, these ICs can function as step-down switching regulators. They serve as ideal power supply

units for portable devices when coupled with the SOP-8L package, providing such outstanding features as low current

consumption. Since this converter can accommodate an input voltage up to 23V, it is also suitable for the operation

via an AC adapter.

Features

●

Parameter

VCC Pin Voltage

Feedback Pin Voltage

ON/OFF Pin Voltage

Switch Pin Voltage

Power Dissipation

Storage Temperature Range

Operating Temperature Range

Operating Supply Voltage

Thermal Resistance from Junction to case

Thermal Resistance from Junction to ambient

Input Voltage: 3.6V~23V

Output Voltage: 0.8V~Vcc

Duty Ratio: 0%~100% PWM Control

Oscillation Frequency: 500kHz typ.

Soft-Start (SS), Current Limit (CL), Enable Function

Thermal Shutdown Function

Short Circuit Protect (SCP)

External SW P-Channel MOSFET

Low ESR output capacitor (MLCC application)

SOP-8

Pin Definition:

1. FB

2. EN

3. Comp

4. Vcc

8. Vss

7. Vss

6. SW

5. SW

Symbol

1/9

ST G

Ordering Information

Application

●

TS2509CS RL

3A / 500KHz PWM Buck Converter

Simple High-efficiency Step down Regulator

On-Card Switching Regulators

Part No.

Internally limited

- 0.3 to V

-40 to +150

-20 to +125

+3.6 to +23

- 0.3 to V

Rating

Package

SOP-8

+ 0.3

+ 25

www.DataSheet4U.com

2.5Kpcs / 13” Reel

TS2509

Packing

Version: A09

℃/W

Unit

℃

Related parts for TS2509

TS2509 Summary of contents

Page 1

... SW General Description TS2509 consists of step-down switching regulator with PWM control. These devise include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and etc. TS2509 provides low-ripple power, high efficiency, and excellent transient characteristics. The PWM control circuit is able to the duty ratio linearly form 100%. ...

Page 2

... High (regulator ON Low (regulator OFF =2.5V (ON =0.3V (OFF 5V DSON V = 12V OUT FFI OUT I OUT T SD 2/9 TS2509 www.DataSheet4U.com Min Typ Max 0.784 0.800 0.816 -- =0.2A -- 0.6 -- 0.2 400 500 2 -10 0 ...

Page 3

... PWM Buck Converter 15uH 2.2K 330pF 10uH 2K 330pF 10uH 2K 330pF 10uH 2K 560pF 10uH 2K 560pF 15uH 6.8K 330pF 10uH 4.7K 330pF Coil 3.9K 10nF Coil 2K 10nF Coil 2K 10nF SMD 0.82K 10nF 3/9 TS2509 www.DataSheet4U.com C1 1nF 1nF 820pF 820pF 680pF 1nF 1nF C1 1nF 1nF 1nF 1nF Version: A09 ...

Page 4

... The TS2509 consists of DC/DC converters that employ a pulse-width modulation (PWM) system. In converters of the TS2509, the pulse width varies in a range from 0 to 100%, according to the load current. The ripple voltage produced by the switching can easily be removed through a filter because the switching frequency remains constant. Therefore, these converters provide a low-ripple power over broad ranges of input voltage and load current ...

Page 5

... OUT(MAX) Layout Guidance When laying out the PC board, the following suggestions should be taken to ensure proper operation of the TS2509. These items are also illustrated graphically in below. 1. The power traces, including the PMOS Drain & Source trace, the Schottky and the C2 trace should be kept short, direct and wide to allow large current flow ...

Page 6

... Electrical Characteristics Curve Figure 1. Feedback Voltage vs. Input Voltage Figure 3. Frequency vs. Input Voltage Figure 5. Feedback Voltage vs. Temperature 3A / 500KHz PWM Buck Converter Figure 2.Quiescent Current vs. Input Voltage Figure 4. Frequency vs. Temperature Figure 6. Quiescent Current vs. Temperature 6/9 TS2509 www.DataSheet4U.com Version: A09 ...

Page 7

... I IN OUT Figure 9.Power On test Wave (V =12V, V =5V OUT Figure 11. Load Transient Response 3A / 500KHz PWM Buck Converter Figure 8.Output Ripple =3A) OUT =0.1~3A) OUT 7/9 TS2509 www.DataSheet4U.com (V =12V, V =5V OUT (V =12V, V =5V, I =0.2A) IN OUT OUT Figure 10.Power On test Wave Version: A09 =3A) ...

Page 8

... SOP-8 Mechanical Drawing DIM Year Code M = Month Code (A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep, J=Oct, K=Nov, L=Dec Lot Code 8/9 TS2509 www.DataSheet4U.com SOP-8 DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX. 4.80 5.00 0.189 0.196 3.80 4.00 0.150 0.157 1.35 1 ...

Page 9

... The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications their own risk and agree to fully indemnify TSC for any damages resulting from such improper use or sale 500KHz PWM Buck Converter Notice 9/9 TS2509 www.DataSheet4U.com Version: A09 ...

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