5 Pin Configuration and Functions

Figure 5-1 DRC Package,10-Pin VSON With Thermal Pad(Top View)

Table 5-1 Pin Functions

PIN		TYPE	DESCRIPTION
NAME	VSON	TYPE	DESCRIPTION
BIAS	4	I	Bias input voltage for the error amplifier, reference, and internal control circuits. Use a 1-µF or larger input capacitor for optimal performance. If IN is connected to BIAS, a 4.7-µF or larger capacitor must be used.
EN	5	I	Enable pin. Driving this pin high enables the regulator. Driving this pin low puts the regulator into shutdown mode. This pin must not be left unconnected.
FB	8	I	Feedback pin. This pin is the feedback connection to the center tap of an external resistor divider network that sets the output voltage. This pin must not be left floating.
GND	6	—	Ground
IN	1, 2	I	Input to the device. Use a 1-µF or larger input capacitor for optimal performance.
NC	N/A	—	No connection. This pin can be left floating or connected to GND to allow better thermal contact to the top-side plane.
OUT	9, 10	O	Regulated output voltage. A small capacitor (total typical capacitance ≥ 2.2 μF, ceramic) is needed from this pin to ground to assure stability.
PG	3	O	Power-good pin. An open-drain, active-high output that indicates the status of V_OUT. When V_OUT exceeds the PG trip threshold, the PG pin goes into a high-impedance state. When V_OUT is below this threshold the pin is driven to a low-impedance state. Connect a pullup resistor (10 kΩ to 1 MΩ) from this pin to a supply of up to 6.0 V. The supply can be higher than the input voltage. Alternatively, the PG pin can be left unconnected if output monitoring is not necessary.
SS	7	—	Soft-start pin. A capacitor connected on this pin to ground sets the start-up time. If this pin is left unconnected, the regulator output soft-start ramp time is typically 200 μs.
Thermal pad		—	Must be soldered to the ground plane for increased thermal performance. Internally connected to ground.