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參數(shù)資料
| 型號： | TB7101F(T5L1.2,F) |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 1150 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 3 X 3 MM, 0.65 MM PITCH, PLASTIC, SON-8 |
| 文件頁數(shù)： | 4/22頁 |
| 文件大?。?/td> | 324K |
| 代理商： | TB7101F(T5L1.2,F) |
TB7101F(T5L1.2,F)/(T5L1.5,F)/(T5L1.8,F)/(T5L2.5,F)/(T5L3.3,F)
2008-04-09
12
Thermal Shutdown (TSD)
The TB7101F provides thermal shutdown. When the junction temperature continues to rise and reaches TSD
(160°C typ.), the TB7101F goes into thermal shutdown and shuts off the power supply. TSD has a hysteresis of
about 20°C. The device is enabled again when the junction temperature has dropped by approximately 20°C from
the TSD trip point. The device resumes the power supply when the soft-start circuit is used upon recovery from
the TSD state.
Thermal shutdown is intended to protect the device against abnormal system conditions. It should be ensured
that the TSD circuit will not be activated during normal operation of the system.
Figure 5 Thermal Shutdown Operation
Usage Precautions
The input voltage, output voltage, output current and temperature conditions should be considered when
selecting capacitors and inductors. These components should be evaluated on an actual system prototype for best
selection.
External components such as capacitors and inductor should be placed as close to the TB7101F as possible.
The TB7101F has an ESD diode between the EN and VIN pins. The voltage between these pins should satisfy
VEN VIN < 0.3 V.
Operation might become unstable due to board layout. In that case, add a decoupling capacitor (CC) of 0.1 μF to
1
μF between the SGND and VIN pins.
The overcurrent protection circuits in the Product are designed to temporarily protect Product from minor
overcurrent of brief duration. When the overcurrent protective function in the Product activates, immediately
cease application of overcurrent to Product. Improper usage of Product, such as application of current to Product
exceeding the absolute maximum ratings, could cause the overcurrent protection circuit not to operate properly
and/or damage Product permanently even before the protection circuit starts to operate.
The thermal shutdown circuits in the Product are designed to temporarily protect Product from minor
overheating of brief duration. When the overheating protective function in the Product activates, immediately
correct the overheating situation. Improper usage of Product, such as the application of heat to Product
exceeding the absolute maximum ratings, could cause the overheating protection circuit not to operate properly
and/or damage Product permanently even before the protection circuit starts to operate.
Soft start
TSD Detection threshold: TSD
GND
Switching operation stops
Recovery from TSD
Switching operation starts
VOUT
0
Tj
Hysteresis:
ΔTSD
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