TS2508A
3A / 330KHz PWM Buck Converter
SOP-8
Pin Definition:
1. FB
8. Vss
2. Enable
3. Ocset
4. Vcc
7. Vss
6. SW
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
Ordering Information
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Input Voltage: 3.6V~23V
Part No.
Package
Packing
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
TS2508ACS RL
SOP-8
2.5Kpcs / 13” Reel
Application
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Simple High-efficiency Step down Regulator
Short Circuit Protect (SCP)
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On-Card Switching Regulators
Built-in Internal SW P-Channel MOSFET
Absolute Maximum Rating
Parameter
Symbol
Limit
Unit
VCC Pin Voltage
VCC
VFB
VEN
VSW
PD
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
V
V
Feedback Pin Voltage
ON/OFF Pin Voltage
V
Switch Pin Voltage
V
Power Dissipation
mW
℃
Storage Temperature Range
Operating Temperature Range
Operating Supply Voltage
Output Current
TST
TOP
VOP
IO
℃
V
3
A
Thermal Resistance from Junction to case
Thermal Resistance from Junction to ambient
θ
25
℃/W
℃/W
JC
θ
70
JA
1/8
Version: C12