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PDF TS2508 Data sheet ( Hoja de datos )
| Número de pieza | TS2508 | |
| Descripción | 3A / 330KHz PWM Buck Converter | |
| Fabricantes | Taiwan Semiconductor Company | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TS2508 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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TS2508
2A / 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
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
● 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
Ordering Information
Part No.
TS2508CS 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 +22
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 +20
2
25
70
V
V
V
V
mW
℃
℃
V
A
℃/W
℃/W
1/8 Version: B07
1 page  
TS2508
2A / 330KHz PWM Buck Converter
Function Descriptions (Continue)
Layout Guidance
If you need low Tc & Tj or large PD (Power Dissipation), The dual SW pins (5&6) and Gnd pins (7&8) on the SOP-8
package are internally connected to die pad, The PCB layout should allow for maximum possible copper area at the
SW pins.
1. Connect C3 to VCC and Gnd pin as closely as possible to get good power filter effect.
2. Connect R3 to VCC and OCSET pin as closely as possible.
3. Connect ground side of the C2 & D1 as closely as possible.
Electrical Characteristics Curve
Figure 1. Feedback Voltage vs. Input Voltage
Figure 2.Quiescent Current vs. Input Voltage
Figure 3. Frequency vs. Input Voltage
Figure 4. Frequency vs. Temperature
5/8 Version: B07
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet TS2508.PDF ] | |
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