Datasheet

L6928 Pin settings
Doc ID 11051 Rev 7 3/16
1 Pin settings
Figure 2. Pin connection (top view)
Table 1. Pin description
Pin n° Name Description
1RUN
Shutdown input. When connected to a low level (lower than 0.4 V) the device
stops working. When high (higher than 1.3 V) the device is enabled.
2COMP
Error amplifier output. A compensation network has to be connected to this pin.
Usually a 220 pF capacitor is enough to guarantee the loop stability.
3 VFB
Error amplifier inverting input. The output voltage can be adjusted from 0.6 V up
to the input voltage by connecting this pin to an external resistor divider.
4 GND Ground.
5LX
Switch output node. This pin is internally connected to the drain of the internal
switches.
6V
CC
Input voltage. The start up input voltage is 2.2 V (typ) while the operating input
voltage range is from 2 V to 5.5 V. An internal UVLO circuit realizes a 100 mV
(typ.) hysteresis.
7 SYNC
Operating mode selector input. When high (higher than 1.3 V) the low
consumption mode is selected. When low (lower than 0.5 V) the low noise mode
is selected. If connected with an appropriate external synchronization signal
(from 500 kHz up to 1.4 MHz) the internal synchronization circuit is activated
and the device works at the same switching frequency.
8 PGOOD
Power good comparator output. It is an open drain output. A pull-up resistor
should be connected between PGOOD and V
OUT
(or V
CC
depending on the
requirements). The pin is forced low when the output voltage is lower than 90%
of the regulated output voltage and goes high when the output voltage is greater
than 90% of the regulated output voltage. If not used the pin can be left floating.
- E-Pad To be connected to GND plane for optimal thermal performance.
RUN
COMP
VFB
GND
1
3
2
4LX
V
CC
SYNC
PGOOD8
7
6
5
D01IN1239AMOD
1
2
3
4
8
7
6
5
RUN
COMP
VFB
GND
PGOOD
SYNC
V
CC
LX
E-pad
AM10471v1