NCP690, NCP691, NCP692

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Figure 5. NCP690 Block Diagram (Fixed Version)

Figure 6. NCP691 Block Diagram (Fixed Version)

BANDGAP

REFERENCE

ENABLE

R2

R1

MOSFET

DRIVER WITH

CURRENT LIMIT

SNS

OUT

EN

IN

GND

THERMAL

SHUTDOWN

ACTIVE

DISCHARGE

LOGIC

BANDGAP

REFERENCE

ENABLE

R2

R1

MOSFET

DRIVER WITH

CURRENT LIMIT

SNS

OUT

N/C

IN

GND

THERMAL

SHUTDOWN

ACTIVE

DISCHARGE

LOGIC

Figure 7. NCP692 Block Diagram (Fixed Version)

BANDGAP

REFERENCE

ENABLE

R2

R1

MOSFET

DRIVER WITH

CURRENT LIMIT

SNS

OUT

EN

IN

GND

THERMAL

SHUTDOWN

ACTIVE

DISCHARGE

LOGIC

Table 1. PIN FUNCTION DESCRIPTION FOR FIXED 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

OUT

Regulated output voltage

5

SNS

Sense input. This pin should be connected directly to OUT pin.