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TS2508A Schematic ( PDF Datasheet ) - Taiwan Semiconductor Company

Teilenummer TS2508A
Beschreibung 3A / 330KHz PWM Buck Converter
Hersteller Taiwan Semiconductor Company
Logo Taiwan Semiconductor Company Logo 




Gesamt 8 Seiten
TS2508A Datasheet, Funktion
TS2508A
3A / 330KHz PWM Bwwuwc.DkataCShoeent4vU.ecormter
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
Feedback Pin Voltage
ON/OFF Pin Voltage
Switch Pin Voltage
Power Dissipation
Storage Temperature Range
Operating Temperature Range
Operating Supply Voltage
Output Current
Thermal Resistance from Junction to case
Thermal Resistance from Junction to ambient
VCC
VFB
VEN
VSW
PD
TST
TOP
VOP
IO
θJC
θJA
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






TS2508A Datasheet, Funktion
Electrical Characteristics Curve
TS2508A
3A / 330KHz PWM Bwwuwc.DkataCShoeent4vU.ecormter
Figure 7. Feedback Voltage vs. Temperature
Figure 8. Quiescent Current vs. Temperature
Figure 9. Efficiency vs. Output Current
Figure 10. Efficiency vs. Output Current
6/8 Version: A09

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