參數(shù)資料
型號: TCV7100F(TE12L,Q)
元件分類: 穩(wěn)壓器
英文描述: 4.2 A SWITCHING REGULATOR, 960 kHz SWITCHING FREQ-MAX, PDSO8
封裝: 5 X 5 MM, 1.27 MM PITCH, PLASTIC, HSON-8
文件頁數(shù): 16/17頁
文件大?。?/td> 394K
代理商: TCV7100F(TE12L,Q)
TCV7100F
2008-06-10
8
Undervoltage Lockout (UVLO)
The TCV7100F has undervoltage lockout (UVLO) protection circuitry. The TCV7100F does not provide output
voltage (VOUT) until the input voltage has reached VUVR (2.55 V typ.). UVLO has hysteresis of 0.1 V (typ.). After
the switch turns on, if VIN2 drops below VUV (2.45 V typ.), UVLO shuts off the switch at VOUT.
Figure 5 Undervoltage Lockout Operation
Thermal Shutdown (TSD)
The TCV7100F provides thermal shutdown. When the junction temperature continues to rise and reaches TSD
(150°C typ.), the TCV7100F goes into thermal shutdown and shuts off the power supply. TSD has a hysteresis of
about 15°C (typ.). The device is enabled again when the junction temperature has dropped by approximately
15°C from the TSD trip point. The device resumes the power supply when the soft-start circuit is activated upon
recovery from 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 6 Thermal Shutdown Operation
Soft start
VIN2
Hysteresis:
ΔVUV
Undervoltage lockout
detection voltage VUV
Switching operation
stops
GND
VOUT
GND
Undervoltage lockout
recovery VUVR
Switching operation starts
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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