TS2509

3A / 500KHz PWM Buck Converter

1/9

Version: A09

SOP-8

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.

Ordering Information

Part No.

Package

Packing

TS2509CS RL

SOP-8

2.5Kpcs / 13” Reel

Features

●

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)

Application

●

Simple High-efficiency Step down Regulator

●

On-Card Switching Regulators

Absolute Maximum Rating

Parameter

Symbol

Rating

Unit

VCC Pin Voltage

V

Feedback Pin Voltage

V

ON/OFF Pin Voltage

V

Switch Pin Voltage

V

Power Dissipation

Internally limited

mW

Storage Temperature Range

-40 to +150

℃

Operating Temperature Range

-20 to +125

℃

Operating Supply Voltage

+3.6 to +23

V

Thermal Resistance from Junction to case

40

℃/W

Thermal Resistance from Junction to ambient

70

℃/W

Pin Definition:

1. FB

8. Vss

2. EN

7. Vss

3. Comp

6. SW

4. Vcc

5. SW