Datasheet

( )
ns
L
VV
II
OUTIN
HSLIMFtyppeak
30×
-
+=
_)(
TPS62160
TPS62161, TPS62162, TPS62163
SLVSAM2C NOVEMBER 2011REVISED SEPTEMBER 2013
www.ti.com
The dynamic high side switch peak current can be calculated as follows:
(5)
Care on the current limit has to be taken if the input voltage is high and very small inductances are used.
Power Good (PG)
The TPS6216X has a built in power good (PG) function to indicate whether the output voltage has reached its
appropriate level or not. The PG signal can be used for startup sequencing of multiple rails. The PG pin is an
open-drain output that requires a pull-up resistor (to any voltage below 7V). It can sink 2mA of current and
maintain its specified logic low level. It is high impedance when the device is turned off due to EN, UVLO or
thermal shutdown.
Under Voltage Lockout (UVLO)
If the input voltage drops, the under voltage lockout prevents misoperation of the device by switching off both the
power FETs. The under voltage lockout threshold is set typically to 2.7V. The device is fully operational for
voltages above the UVLO threshold and turns off if the input voltage trips the threshold. The converter starts
operation again once the input voltage exceeds the threshold by a hysteresis of typically 180mV.
Thermal Shutdown
The junction temperature (Tj) of the device is monitored by an internal temperature sensor. If Tj exceeds 160°C
(typ), the device goes into thermal shut down. Both the high-side and low-side power FETs are turned off and PG
goes high impedance. When Tj decreases below the hysteresis amount, the converter resumes normal
operation, beginning with Soft Start. To avoid unstable conditions, a hysteresis of typically 20°C is implemented
on the thermal shut down temperature.
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Product Folder Links: TPS62160 TPS62161 TPS62162 TPS62163