L7986TA STMicroelectronics, L7986TA Datasheet - Page 14

• Manufacturer Part Number: L7986TA
• Description: 3A step-down switching regulator
• Manufacturer: STMicroelectronics

Specifications of L7986TA

• Low Dropout Operation: 100% duty cycle

Functional description
5.5
5.6
14/43
Equation 5
Where F
Figure 7.
Enable function
The enable feature allows to put in standby mode the device.With EN pin lower than 0.3V
the device is disabled and the power consumption is reduced to less than 30 μA. With EN
pin lower than 1.2 V, the device is enabled. If the EN pin is left floating, an internal pull down
ensures that the voltage at the pin reaches the inhibit threshold and the device is disabled.
The pin is also V
Hysteretic thermal shutdown
The thermal shutdown block generates a signal that turns off the power stage if the junction
temperature goes above 150°C. Once the junction temperature goes back to about 130°C,
the device restarts in normal operation. The sensing element is very close to the PDMOS
area, so ensuring an accurate and fast temperature detection.
SW
* is 800 kHz divided by eight.
Overcurrent protection
CC
I
OUT
compatible.
=
--------------------------------------------------------------------------------------------------------------- -
(
DRC T
Doc ID 022098 Rev 1
⁄
V
ON_MIN
IN
⋅
F
*
SW
)
+
–
(
R
V
DSON
F
⁄
T
ON_MIN
+
DCR
) F
⋅
*
SW
=
4.2A
L7986TA