TS2508

2A / 330KHz PWM Buck Converter

1/8

Version: B07

SOP-8

General Description

TS2508 consists of step-down switching regulator with PWM control. These devise include a reference voltage

source, oscillation circuit, error amplifier, internal PMOS and etc. TS2508 provides low-ripple power, high efficiency,

and excellent transient characteristics. The PWM control circuit is able to very 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-8 package, providing such outstanding features as low

current consumption. Since this converter can accommodate an input voltage up to 20V, it is also suitable for the

operation via an AC adapter.

Ordering Information

Part No.

Package

Packing

TS2508CS RL

SOP-8

2.5Kpcs / 13” Reel

Features

●

Input Voltage: 3.6V~20V

●

Output Voltage: 0.8V~Vcc

●

Duty Ratio: 0%~100% PWM Control

●

Oscillation Frequency: 330kHz typ.

●

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

●

Thermal Shutdown Function

●

Short Circuit Protect (SCP)

●

Built-in Internal SW P-Channel MOSFET

Application

●

Simple High-efficiency Step down Regulator

●

On-Card Switching Regulators

Parameter

Symbol

Rating

Unit

VCC Pin Voltage

Gnd -0.3 to Gnd +22

V

Feedback Pin Voltage

Gnd -0.3 to VCC

V

ON/OFF Pin Voltage

Gnd -0.3 to VCC +0.3

V

Switch Pin Voltage

Gnd -0.3 to VCC +0.3

V

Power Dissipation

Internally limited

mW

Storage Temperature Range

-40 to +150

℃

Operating Temperature Range

-20 to +125

℃

Operating Supply Voltage

+3.6 to +20

V

Output Current

2

A

Thermal Resistance from Junction to case

25

℃/W

Thermal Resistance from Junction to ambient

70

℃/W

Pin Definition:

1. FB

8. Vss

2. Enable

7. Vss

3. Ocset

6. SW

4. Vcc

5. SW