TS2508A_12 Datasheet, PDF (1/8 Pages) Taiwan Semiconductor Company, Ltd – 3A / 330KHz PWM Buck Converter

TS2508A
3A / 330KHz PWM Buck Converter
SOP-8
Pin Definition:
1. FB
8. Vss
2. Enable 7. Vss
3. Ocset 6. SW
4. Vcc
5. SW
General Description
TS2508A consists of step-down switching regulator with PWM control. These devise include a reference voltage
source, oscillation circuit, error amplifier, internal PMOS and etc. TS2508A provides low-ripple power, high
efficiency, and excellent transient characteristics. The PWM control circuit is able to very the duty ratio linearly
from 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.
Features
● Input Voltage: 3.6V~23V
● 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
Ordering Information
Part No. Package
Packing
TS2508ACS RL SOP-8 2.5Kpcs / 13” Reel
Application
● Simple High-efficiency Step down Regulator
● On-Card Switching Regulators
Absolute Maximum Rating
Parameter
Symbol
Limit
Unit
VCC Pin Voltage
V_CC
Gnd -0.3 to Gnd +25
V
Feedback Pin Voltage
V_FB
Gnd -0.3 to VCC
V
ON/OFF Pin Voltage
V_EN
Gnd -0.3 to VCC +0.3
V
Switch Pin Voltage
V_SW
Gnd -0.3 to VCC +0.3
V
Power Dissipation
P_D
Internally limited
mW
Storage Temperature Range
T_ST
-40 to +150
℃
Operating Temperature Range
T_OP
-20 to +125
℃
Operating Supply Voltage
V_OP
+3.6 to +23
V
Output Current
I_O
3
A
Thermal Resistance from Junction to case
θ_JC
25
℃/W
Thermal Resistance from Junction to ambient
θ_JA
70
℃/W
1/8
Version: C12