Advanced Monolithic Systems, Inc.

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AMS4106

PIN DESCRIPTION

AMS4106

PIN

NUMBERS

NAME

DESCRIPTION

1

PWRGD

Power good output. Open collector output. A low on the pin indicates that the output is less

than the desired output voltage. There is an internal rising filter on the output of the

PWRGD comparator.

2

SS

Soft start pin connect a capacitor to GND, to slow the start up.

3

GND

Analog ground-internally connected to the sensitive analog ground circuitry.

4, 5

VPWR

6

Input supply voltage, 4.5 V to 20 V powers up the internal circuitry. Must bypass with a

7

COMP

Error amplifier output. Connect frequency compensation network from COMP to GND.

8

F/B

Input pin of the error comparator.

9

F SET

External frequency set 100 Khz-750Khz.

10

ENABLE

Logic enable/disable device function.

11

BST

Boost voltage for the output stage drive. Connect a capacitor between LX pin and Boost.

12, 13, 14

LX

Phase node- Connect to external FET and external L-C filter.

15

PGND

Power Ground-Noisy internal ground-Return currents from the FDR driver output return

through the PGND

16

FDR

Gate drive for low side MOSFET. Connect gate of n-channel MOSFET.