ams Datasheet

Page 3

[v1-01] 2015-May-22

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AS1383 − Pin Assignment

Figure 4:

Pin Assignment for WL-CSP

Figure 5:

Pin Description

Note(s) and/or Footnote(s):

1. An optional Schottky diode can be connected between this pin and VOUT.

Pin Assignments: Shows the TOP view

pin assignment of the AS1383.

Pin Number

Pin Name

Description

A1

VIN

Input Voltage. The AS1383 gets its start-up bias from VIN unless VOUT

exceeds VIN, in which case the bias is derived from VOUT. Thus, once

started, operation is completely independent from VIN.

Operation is only limited by the output power level and the internal series

resistance of the supply.

A2

GND

Signal and Power Ground

B1

SW

Switch Pin. Connect an inductor between this pin and VIN. Keep the PCB

trace lengths as short and wide as is practical to reduce EMI and voltage

overshoot. If the inductor current falls to zero, or pin EN is low, an internal

100Ω anti-ringing switch is connected from this pin to VIN to minimize

EMI. (1)

B2

VOUT

Output Voltage. Bias is derived from VOUT when VOUT exceeds VIN. PCB

trace length from VOUT to the output filter capacitor(s) should be as short

and wide as is practical.

C1

EN

Active-High Enable Input. A logic LOW reduces the supply current to

< 1μA.

Connect to pin VIN for normal operation.

C2

FB

Feedback Pin. Feedback input to the gm error amplifier, connect this pin

to VOUT

Pin Assignment

A2

C1

C2

B2

B1

A1