TLF50241EL_15 Datasheet, PDF (22/30 Pages) Marl International Limited – 2.2 MHz Step-Down Regulator 500 mA, 5 V, low quiescent current

TLF50241EL
7
Thermal Shutdown
7.1
Description
Thermal Shutdown
The integrated thermal shutdown function turns off the power switch in case of overtemperature. The typ. junction
shutdown temperature is 175°C, with a min. of 155°C. After cooling down, the IC will automatically restart with a
soft start into normal operation. The thermal shutdown is an integrated protection function designed to prevent IC
destruction when operating under fault conditions. It should not be used for normal operation.
7.2
Electrical Characteristics Bias and Thermal Shutdown
Electrical Characteristics: Bias and Thermal Shutdown
V_S = 6.0 V to 40 V, T_j = -40 °C to +150 °C, all voltages with respect to ground (unless otherwise specified)
Pos. Parameter
Symbol
Limit Values
Unit Conditions
Min. Typ. Max.
Bias
7.2.1 Current consumption of V_CC I_{q,ON,V_CC} –
–
60
µA
V_S = 16V; V_CC = 5.4V
T_j < 105°C;
PFM mode
7.2.2 Current consumption of V_S I_{q,ON,V_S} –
15
25
µA
V_S = 16V; V_CC = 5.4V;
T_j < 105°C;
PFM mode
Internal Over Temperature Protection
7.2.3 Over temperature shutdown T_j,sd
155 175 195 °C
1)
7.2.4 Over temperature shutdown T_{j,sd_hyst} -
15
–
K
1)
hysteresis
1) Specified by design. Not subject to production test.
Data Sheet
22
Rev. 1.0, 2013-06-19