TS2508A 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
5. Vss
2. Enable 6. Vss
3. Ocset 7. 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 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.
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.
TS2508ACS RL
Package
SOP-8
Packing
2.5Kpcs / 13” Reel
Application
● Simple High-efficiency Step down Regulator
● On-Card Switching Regulators
Absolute Maximum Rating
Parameter
Symbol
Rating
Unit
VCC Pin Voltage
V_CC
Feedback Pin Voltage
V_FB
ON/OFF Pin Voltage
V_EN
Switch Pin Voltage
V_SW
Power Dissipation
P_D
Storage Temperature Range
T_ST
Operating Temperature Range
T_OP
Operating Supply Voltage
V_OP
Output Current
I_O
Thermal Resistance from Junction to case
θ_JC
Thermal Resistance from Junction to ambient
θ_JA
Gnd -0.3 to Gnd +25
Gnd -0.3 to VCC
Gnd -0.3 to VCC +0.3
Gnd -0.3 to VCC +0.3
Internally limited
-40 to +150
-20 to +125
+3.6 to +23
3
25
70
V
V
V
V
mW
℃
℃
V
A
℃/W
℃/W
1/8
Version: A09