TS2508 Taiwan Semiconductor Company, Ltd. (TSC), TS2508 Datasheet

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TS2508

Manufacturer Part Number
TS2508
Description
2a / 330khz Pwm Buck Converter
Manufacturer
Taiwan Semiconductor Company, Ltd. (TSC)
Datasheet
Absolute M
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.
Features
Parameter
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
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
SOP-8
aximum Rating
Pin Definition:
1. FB
2. Enable
3. Ocset
4. Vcc
5. Vss
6. Vss
7. SW
5. SW
Symbol
V
V
V
V
T
V
T
θ
θ
P
I
1/8
SW
OP
CC
FB
EN
ST
OP
O
JC
JA
D
Ordering Information
Application
TS2508CS RL
2A / 330KHz PWM Buck Converter
Simple High-efficiency Step down Regulator
On-Card Switching Regulators
Part No.
Gnd -0.3 to VCC +0.3
Gnd -0.3 to VCC +0.3
Gnd -0.3 to Gnd +22
Gnd -0.3 to VCC
Internally limited
-40 to +150
-20 to +125
+3.6 to +20
Rating
25
70
Package
2
SOP-8
2.5Kpcs / 13” Reel
TS2508
Version: B07
Packing
℃/W
℃/W
Unit
mW
V
V
V
V
V
A

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TS2508 Summary of contents

Page 1

... SW 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 100% ...

Page 2

... SH Low (regulator OFF =2.5V (ON =0.3V (OFF 5V DSON V = 12V 12V, CC OUT E FFI OUT OUT 2/8 TS2508 Min Typ Max 0.784 0.800 0.816 -- 110 2 -- =0. 0.3 260 330 2 -10 0 100 -- ...

Page 3

... The TS2508 consists of DC/DC converters that employ a pulse-width modulation (PWM) system. In converters of the TS2508, the pulse width varies in a range from 0 to 100%, according to the load current. The ripple voltage produced by the switching can easily be removed through a filter because the switching frequency remains constant. Therefore, these converters provide a low-ripple power over broad ranges of input voltage and load current ...

Page 4

... Function Descriptions (Continue) Setting the Output Voltage Application circuit item shows the basic application circuit with TS2508 adjustable output version. The external resistor sets the output voltage according to the following equation: Table 1: Resistor select for output voltage setting V R2 OUT 1.3K 5V 5.6K 1.5K 3.3V 5.6K 2.2K 2.5V 5.6K 1.8V 1.2K 1.5V 2.2K 1.2V 2K ...

Page 5

... OCSET pin as closely as possible Connect ground side of the C2 & closely as possible. Electrical Characteristics Curve Figure 1. Feedback Voltage vs. Input Voltage Figure 3. Frequency vs. Input Voltage 2A / 330KHz PWM Buck Converter Figure 2.Quiescent Current vs. Input Voltage Figure 4. Frequency vs. Temperature 5/8 TS2508 Version: B07 ...

Page 6

... Electrical Characteristics Curve Figure 7. Feedback Voltage vs. Temperature Figure 9. Efficiency vs. Output Current 2A / 330KHz PWM Buck Converter Figure 8. Quiescent Current vs. Temperature Figure 10. Efficiency vs. Output Current 6/8 TS2508 Version: B07 ...

Page 7

... SOP-8 Mechanical Drawing DIM Year Code M = Month Code (A=Jan, B=Feb, C=Mar, D=Apl, E=May, F=Jun, G=Jul, H=Aug, I=Sep, J=Oct, K=Nov, L=Dec Lot Code 7/8 TS2508 SOP-8 DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX. 4.80 5.00 0.189 0.196 3.80 4.00 0.150 0.157 1.35 1.75 0.054 ...

Page 8

... The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications their own risk and agree to fully indemnify TSC for any damages resulting from such improper use or sale 330KHz PWM Buck Converter Notice 8/8 TS2508 Version: B07 ...

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