AS1340
Datasheet - Pinout
4 Pinout
Pin Assignments
Figure 2. Pin Assignments (Top View)
EN
VCC
1
2
3
4
8
7
6
5
FB
GND
SWOUT
LX
AS1340
SWVIN
POK
GND
9
Pin Descriptions
Table 1. Pin Descriptions
Pin Number
Pin Name
Description
Active-High Enable Input. A logic low on this pin shuts down the device and
reduces the supply current to 0.1µA.
1
EN
Note: Connect to VCC for normal operation.
+2.7V to +5.5V Supply Voltage. Bypass this pin to GND with a ≥1µF capacitor.
Shutdown Disconnect Switch In
2
3
VCC
SWVIN
Power-OK.
0 = VOUT < 90% of VOUTNOM.
1 = VOUT > 90% of VOUTNOM.
Inductor. The drain of the internal N-channel MOSFET.
4
5
POK
LX
Note: This pin is high impedance in shutdown.
Shutdown Disconnect Switch Out. Disconnects the input from the output during
shutdown.
6
7
SWOUT
GND
Ground. This pin and pin 9 must be connected to GND to ensure normal operation.
Feedback Pin. Feedback input to the gm error amplifier. Connect a resistor divider
tap to this pin. The output voltage can be adjusted from VIN to 50V by:
VOUT = 1.25V[1 + (R1/R2)]
8
9
FB
Ground. This pin and pin 7 must be connected to GND to ensure normal operation.
GND
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