TS2507 Datasheet PDF - Taiwan Semiconductor Company
| Part Number | TS2507 | |
| Description | 0.5A / 330KHz PWM Buck Controller | |
| Manufacturers | Taiwan Semiconductor Company | |
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TS2507
0.5A / 330KHz PWM Bwwuwc.DkataCShoeent4tUr.coolmler
SOP-8
Pin Definition:
1. EN
5. FB
2. Comp 6. Vss
3. Ocset 7. LX
4. Vcc
5. Gate
General Description
The TS2507 integrates Pulse-Width-Modulation (PWM) control circuit into a single chip. These devise include a
reference voltage source, oscillation circuit, error amplifier and etc. TS2507 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 controller 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 external P-channel Power MOS, a coil, capacitors, and
a diode connected externally, these components can function as step-down switching regulators. They serve as ideal
power supply units for portable devices when coupled with the SOP-8, providing such outstanding features as low
current consumption. Since this converter can accommodate an input
Features
● Input Voltage: 3.6V~24V
● 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)
● External SW P-Channel MOSFET
● Low ESR Output Capacitor Application
● SOP-8 Pb-Free Package
Ordering Information
Part No.
TS2507CS 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
VCC
VFB
VEN
VSW
PD
TST
TOP
VOP
θJC
θJA
VSS - 0.3 to VSS + 26
VSS - 0.3 to VCC
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 +24
40
120
V
V
V
V
mW
V
/W
/W
1/9 Version: A07
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TS2507
0.5A / 330KHz PWM Bwwuwc.DkataCShoeent4tUr.coolmler
Function Descriptions (Continue)
Inductor Selection
For most designs, Low inductance values are physically smaller but require faster switching, which results in some
efficiency loss. The inductor value can be derived from the following equation:
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 input current 3A, ∆IL=0.45A.
Table 2 Inductor select for output voltage setting (TS2507 at VCC=12V)
VOUT
2.5V
3.3V
5V 3.3V(5A) 5V(5A)
L1 Value
15uH
18uH
22uH
12uH
15uH
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+0.3A).
Layout Guidance
When laying out the PC board, the following suggestions should be taken to ensure proper operation of the TS2507.
These items are also illustrated graphically in below.
1. The power traces, including the PMOS Drain & Source trace, the Schottky and the C2 trace should be kept short,
direct and wide to allow large current flow.
2. Connect the C5 to the VCC & EN pins of the TS2507 as closely as possible to get good power filter effect.
3. Keep the switching node, away from the sensitive FB node.
4. Connect ground side of the C2 & D1 as closely as possible.
5. Connect PMOS Source and R3 as closely as possible.
6. Do not trace signal line under inductor.
5/9 Version: A07
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for TS2507 electronic component. |
| Information | Total 9 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ TS2507.PDF Datasheet ] | |
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