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SC284

Pin Descriptions

Pin #

Pin Name

Pin Function



PVINA

Channel A — Input supply voltage for the converter power stage and internal circuitry.

2

AGNDA

Ground connection for internal circuitry — connect directly to PGNDA.

3

AVINA

Power supply for internal circuitry — Must be connected to PVINA using an R-C filter of Ω and 0nF.

4

CTL0A

Channel A — Control bit 0, see Table  for decoding. This pin has a  MΩ internal pull-down resistor. This resis-

tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in

under-voltage lockout.

5

CTLA

Channel A — Control bit , see Table  for decoding. This pin has a  MΩ internal pull-down resistor. This resis-

tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in

under-voltage lockout.

6

CTL2A

Channel A — Control bit 2, see Table  for decoding. This pin has a  MΩ internal pulldown resistor. This resis-

tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in

under-voltage lockout.

7

CTL3A

Channel A — Control bit 3, see Table  for decoding. This pin has a  MΩ internal pull-down resistor. This resis-

tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in

under-voltage lockout.

8

VOUTB

Output voltage sense pin of Channel B

9

PGNDB

Channel B — Ground connection for converter power stage and internal circuitry.

0

LXB

Switching node of Channel B — connect an inductor between this pin and the output capacitor.



PVINB

Channel B — Input supply voltage for the converter power stage and internal circuitry.

2

AGNDB

Ground connection for internal circuitry — connect directly to PGNDB.

3

AVINB

Power supply for internal circuitry — Must be connected to PVINB using an R-C filter of Ω and 0nF.

4

CTL0B

Channel B — Control bit 0, see Table  for decoding. This pin has a  MΩ internal pulld-own resistor. This resis-

tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in

under-voltage lockout.

5

CTLB

Channel B — Control bit  - see Table  for decoding. This pin has a  MΩ internal pull-down resistor. This

resistor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is

in under-voltage lockout.

6

CTL2B

Channel B — Control bit 2, see Table  for decoding. This pin has a  MΩ internal pull-down resistor. This resis-

tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in

under-voltage lockout.

7

CTL3B

Channel B — Control bit 3, see Table  for decoding. This pin has a  MΩ internal pull-down resistor. This resis-

tor is switched in circuit whenever the pin voltage is below the input high threshold, or when the part is in

under-voltage lockout.

8

VOUTA

Output voltage sense pin of Channel A

9

PGNDA

Channel A — Ground connection for converter power stage and internal circuitry.

20

LXA

Switching node of Channel A — connect an inductor between this pin and the output capacitor.