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부품번호 | TS2509 기능 |
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기능 | 3A / 500KHz PWM Buck Converter | ||
제조업체 | Taiwan Semiconductor Company | ||
로고 | |||
전체 9 페이지수
TS2509
3A / 500KHz PWM Bwwuwc.DkataCShoeent4vU.ecormter
SOP-8
Pin Definition:
1. FB
8. Vss
2. EN
7. Vss
3. Comp 6. SW
4. Vcc
5. SW
General Description
TS2509 consists of step-down switching regulator with PWM control. These devise include a reference voltage
source, oscillation circuit, error amplifier, internal PMOS and etc. TS2509 provides low-ripple power, high efficiency,
and excellent transient characteristics. The PWM control circuit is able to 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-8L package, providing such outstanding features as low current
consumption. Since this converter can accommodate an input voltage up to 23V, 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: 500kHz typ.
● Soft-Start (SS), Current Limit (CL), Enable Function
● Thermal Shutdown Function
● Short Circuit Protect (SCP)
● External SW P-Channel MOSFET
● Low ESR output capacitor (MLCC application)
Ordering Information
Part No.
TS2509CS 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
VCC VSS - 0.3 to VSS + 25 V
VFB VSS - 0.3 to VCC
V
ON/OFF Pin Voltage
Switch Pin Voltage
Power Dissipation
Storage Temperature Range
Operating Temperature Range
Operating Supply Voltage
VEN
VSW
PD
TST G
TOP
VOP
VSS - 0.3 to VCC + 0.3
VSS - 0.3 to VCC + 0.3
Internally limited
-40 to +150
-20 to +125
+3.6 to +23
V
V
mW
℃
℃
V
Thermal Resistance from Junction to case
θJC
40 ℃/W
Thermal Resistance from Junction to ambient
θJA
70 ℃/W
1/9 Version: A09
TS2509
3A / 500KHz PWM Bwwuwc.DkataCShoeent4vU.ecormter
Function Descriptions
PWM Control
The TS2509 consists of DC/DC converters that employ a pulse-width modulation (PWM) system. In converters of the
TS2509, 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.
Setting the Output Voltage
Application circuit item shows the basic application circuit with TS2509 adjustable output version. The external resistor
sets the output voltage according to the following equation:
(EL CAP) Resistor select for output voltage setting
VOUT
5V
3.3V
2.5V
1.8V
1.5V
1.2V
1V
R2
1.3K
1.5K
2.2K
2K
2.2K
3K
10K
R1
6.8K
4.7K
4.7K
2.5K
2K
1.5K
2.5K
(MLCC) Resistor select for output voltage setting
VOUT
5V
3.3V
2.5V
1.8V
1.5V
1.2V
1V
R2
7.5K
15K
22K
27K
30K
30K
56K
R1
39K
47K
47K
33K
27K
15K
13K
Inductor Selection
For most designs, the operate with inductors of 10µH to 22µH. The inductor value can be derived from the following
equation:
L1 Recommend Value (VIN=12V, IOUT=3A)
VOUT
1.8V
2.5V
3.3V
L1 Value 10~15uH 10~15uH 15~22uH
5V
15~22uH
Where is inductor Ripple Current. Large value inductors lower ripple current and small value inductors result in high
ripple currents. Choose inductor ripple current approximately 15% of the maximum load current 3A, ΔIL=0.4A. The DC
current rating of the inductor should be at least equal to the maximum load current plus half the ripple current to
prevent core saturation (3A+0.2A).
Input Capacitor Selection
(EL CAP)
This capacitor should be located close to the IC using short leads and the voltage rating should be approximately 1.5
times the maximum input voltage. The RMS current rating requirement for the input capacitor of a buck regulator is
approximately 1⁄2 the DC load current. A low ESR input capacitor sized for maximum RMS current must be used. A
220µF low ESR capacitor for most applications is sufficient.
(MLCC)
A 22µF MLCC or two 10uF MLCC capacitors for most applications is sufficient.
4/9 Version: A09
4페이지 Electrical Characteristics Curve
TS2509
3A / 500KHz PWM Bwwuwc.DkataCShoeent4vU.ecormter
Figure 7. Efficiency
Figure 8.Output Ripple (VIN=12V, VOUT=5V, IOUT=3A)
(VIN=12V, VOUT=5V, IOUT=3A)
Figure 9.Power On test Wave
(VIN=12V, VOUT=5V, IOUT=0.2A)
Figure 10.Power On test Wave
(VIN=12V, VOUT=5V, IOUT=0.1~3A)
Figure 11. Load Transient Response
7/9
Version: A09
7페이지 | |||
구 성 | 총 9 페이지수 | ||
다운로드 | [ TS2509.PDF 데이터시트 ] |
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |