TLF51801ELV Datasheet, PDF (20/29 Pages) Infineon Technologies AG – 10 A synchronous DC/DC Step-Down Controller

TLF51801ELV
Module Enable and Thermal Shutdown
8
Module Enable and Thermal Shutdown
8.1
Description
With the enable pin the device can be set in off-state reducing the current consumption to less than 2µA.
The enable function features an integrated pull down resistor which ensures that the IC is shut down and the
external MOSFETs are off in case the pin EN is left open.
The integrated thermal shutdown function turns the external MOSFETs off in case of overtemperature. The typical
junction shutdown temperature is 175°C, with a minimum of 160°C. After cooling down, the IC will automatically
restart with soft start. The thermal shutdown is an integrated protection function designed to prevent IC destruction
when operating under fault conditions.
8.2
Electrical Characteristics Module Enable, Bias and Thermal Shutdown
Electrical Characteristics: Enable, 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.
8.2.1 Current Consumption,
shut down mode
I_q,OFF
–
0.1
2
µA
V_EN = 0.8V;
T_j < 105°C; V_s = 16V
8.2.2 Current Consumption,
I_q,ON
–
3
10
mA V_EN = 5.0V;
active mode
I_IVCC= 0mA;
V_S = 16V
8.2.3 Enable high signal valid
V_EN,lo
3.0
–
–
V
–
8.2.4 Enable low signal valid
V_EN,hi
–
–
0.8
V
–
8.2.5 Enable hysteresis
V_EN,HY
200
300
400
mV
8.2.6 Enable high input current I_EN,hi
–
–
30
µA
V_EN = 16V
8.2.7 Enable low input current I_EN,lo
–
0.1
1
µA
V_EN = 0.5V
8.2.8 Over temperature shutdown T_j,sd
160 175
190
°C
1)
8.2.9
Over temperature shutdown T_{j,sd_hyst} –
hysteresis
15
–
K
1)
1) Not subject to production test, specified by design.
Data sheet
20
Rev. 1.0.1, 2013-04-15