Datasheet
OUT
OUT
FB
SS
GND
10
9
8
7
6
IN
IN
PG
BIAS
EN
1
2
3
4
5
Thermal
Pad
IN
IN
IN
PG
BIAS
OUT
OUT
OUT
NC
FB
TPS74801
IN
EN
11
GND
12
NC
13
NC
14
SS
15
6
7
8
9
10
20
19
18
17
16
5
NC4
NC3
NC2
OUT1
GND
TPS74801
SBVS074J –JANUARY 2007– REVISED JANUARY 2012
www.ti.com
DEVICE INFORMATION
DRC PACKAGE RGW PACKAGE
3mm x 3mm SON 5 x 5 QFN
(TOP VIEW) (TOP VIEW)
PIN DESCRIPTIONS
NAME DRC (SON) RGW (QFN) DESCRIPTION
IN 1, 2 5-8 Input to the device.
Enable pin. Driving this pin high enables the regulator. Driving this pin low puts
EN 5 11
the regulator into shutdown mode. This pin must not be left unconnected.
SS 7 15 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
200μs.
BIAS 4 10 Bias input voltage for error amplifier, reference, and internal control circuits.
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
PG 3 9 low-impedance state. A pull-up resistor from 10kΩ to 1MΩ should be connected
from this pin to a supply of up to 5.5V. The supply can be higher than the input
voltage. Alternatively, the PG pin can be left unconnected if output monitoring is
not necessary.
Feedback pin. The feedback connection to the center tap of an external resistor
FB 8 16
divider network that sets the output voltage. This pin must not be left floating.
OUT 9, 10 1, 18-20 Regulated output voltage. A small capacitor (total typical capacitance ≥ 2.2μF,
ceramic) is needed from this pin to ground to assure stability.
NC N/A 2-4, 13, 14, 17 No connection. This pin can be left floating or connected to GND to allow better
thermal contact to the top-side plane.
GND 6 12 Ground
Thermal Pad — Should be soldered to the ground plane for increased thermal performance.
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Product Folder Link(s): TPS74801