NCP690, NCP691, NCP692

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Figure 8. NCP690 Block Diagram (Adjustable Version)

Figure 9. NCP691 Block Diagram (Adjustable Version)

BANDGAP

REFERENCE

ENABLE

MOSFET

DRIVER WITH

CURRENT LIMIT

ADJ

OUT

EN

IN

GND

THERMAL

SHUTDOWN

ACTIVE

DISCHARGE

LOGIC

BANDGAP

REFERENCE

ENABLE

MOSFET

DRIVER WITH

CURRENT LIMIT

ADJ

OUT

N/C

IN

GND

THERMAL

SHUTDOWN

ACTIVE

DISCHARGE

LOGIC

Figure 10. NCP692 Block Diagram (Adjustable Version)

BANDGAP

REFERENCE

ENABLE

MOSFET

DRIVER WITH

CURRENT LIMIT

ADJ

OUT

EN

IN

GND

THERMAL

SHUTDOWN

ACTIVE

DISCHARGE

LOGIC

Table 2. PIN FUNCTION DESCRIPTION FOR ADJUSTABLE VERSION

Pin No.

Pin Name

Description

1, 6

IN

Voltage inputs which supplies the current to the regulator. Both of these pins should be connected

together for full output current capability

2

GND

Power supply ground of the regulator. Connected to the die through the lead frame. Soldered to the

copper plane allows for effective heat removal.

3

EN

For NCP691 and NCP692 this pin functions as Enable Active Low and Enable Active High respect-

ively. For NCP690 this pin has no special meaning and should be left disconnected.

4

ADJ

Feedback input. Connect to middle point of resistor divider for Adjustable version.

5

OUT

Regulated output voltage