TS2509 Datasheet, PDF (1/9 Pages) Taiwan Semiconductor Company, Ltd – 3A / 500KHz PWM Buck Converter

TS2509
3A / 500KHz PWM Buck Converter
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
ON/OFF Pin Voltage
Switch Pin Voltage
Power Dissipation
Storage Temperature Range
Operating Temperature Range
Operating Supply Voltage
Thermal Resistance from Junction to case
Thermal Resistance from Junction to ambient
V_CC
V_FB
V_EN
V_SW
P_D
T_{ST G}
T_OP
V_OP
θ_JC
θ_JA
V_SS - 0.3 to V_SS + 25
V_SS - 0.3 to V_CC
V_SS - 0.3 to V_CC + 0.3
V_SS - 0.3 to V_CC + 0.3
Internally limited
-40 to +150
-20 to +125
+3.6 to +23
40
70
V
V
V
V
mW
℃
℃
V
℃/W
℃/W
1/9
Version: A09