Datasheet

Enable (EN) Jumper
2-2
Evaluation With the TPS6200xEVM
2.1 Enable (EN) Jumper
This jumper is used to enable the device. Connecting the EN pin to VIN (e.g.
set jumper, EN, across pin 1 and pin 2) enables the part.
2.2 Synchronization (SYNC) Jumper
This jumper is used to force the device into low noise fixed frequency pulse
width modulation (PWM) mode by setting the jumper across pin 2 and pin 3.
Setting the jumper across pin 1 and pin 2 enables the power save mode where
the device enters a pulse frequency modulation mode (PFM) at light to
medium load currents, thus reducing quiescent current and switching
frequency to a minimum to achieve highest efficiency over the entire load
current range. The operation of the different modes can be best observed by
monitoring the L pin (pin 9), which is connected to the inductor.
Additionally an external clock between 500 kHz and 1 MHz with a CMOS logic
level signal can be applied to pin 2 in order to synchronize the converter to an
external clock.
2.3 Current Limit (ILIM) Jumper
Connecting the jumper across pin 1 and pin 2 will force the device to operate
with a typical switch current limit of 1200 mA. Connecting the jumper across
pin 2 and pin 3 forces a typical switch current limit 600 mA for low current
applications. This reduces the short circuit current and allows the use of the
smallest inductor size.
2.4 Power Good (PG) Pin
The PG pin is an open drain output with a pullup resistor, R4, connected to the
output. The signal on this pin goes high as soon as the output voltage is greater
than typically 94.5% of the nominal voltage. The signal goes low as soon as
the output voltage falls below typically 92% of the nominal value.