DB4679 Rev 1

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L5964

Pins description

15

33

OCPSET1

IN

Programmable OCP setting for DC/DC1. Pin floating sets the overcurrent

threshold to 4A; shorted to AGND sets the threshold to 2 A.

34

PGOV2

OUT

Over-voltage DC/DC2 signal. Open-drain output.

35

PGOV1

OUT

Over-voltage DC/DC1 signal. Open-drain output.

36

PHASE1

OUT

DC/DC1 power stage output (for external inductor and boot-strap

capacitor connection).

37

PHASE1

OUT

DC/DC1 power stage output (for external inductor and boot-strap

capacitor connection).

38

BS1

OUT

Boot-strap capacitor connection for DC/DC1.

39

VINBUCK1

SUPPLY

DC/DC1 power supply connection.

40

VINBUCK1

SUPPLY

DC/DC1 power supply connection.

41

FREQSET

IN

Programmable internal PWM frequency for DC/DC. Pin floating sets the

frequency to 2M Hz; shorted to AGND sets the frequency to 250 kHz and

inhibits FDIVISION.

42

TJTEST

OUT

Device junction temperature information.

43

PGLDO

OUT

LDO regulator Power good output. Open-drain output.

44

FB1

IN/OUT

DC/DC1 Output feedback. Connected to error amplifier that compares the

feedback voltage to the internal reference voltage.

45

COMP1

IN/OUT

DC/DC1 Error amplifier output for compensation network connection.

46

PGTHLDO

IN

Power good threshold setting for LDO. Pin floating sets the threshold to

95% of VOUTLDO; shorted to AGND sets the threshold to 85% of

VOUTLDO.

47

AGND

GROUND Device analog ground.

48

SUB

GROUND Device substrate ground.

49

TAB

-

Device slug connection.

50

N.C.

-

Not Connected.

51

WDI

IN

Watchdog input from Microcontroller. Internal Pull Down.

52

FBLDO

IN/OUT

LDO regulator output feedback.

53

VOUTLDO

OUT

LDO regulator output.

54

VINLDO

SUPPLY

LDO regulator power supply.

55

VBAT

SUPPLY

Dedicated high voltage supply for reference blocks.

56

HSD_EN

OUT

Enable signal for external High Side switch (active low).

Only active in microcontroller mode, high impedance in normal mode.

57

TESTMODE

IN

TESTMODE pin, reserved use. Connect to ground.

58

WAKEL

IN

Wake-up signal to enable DC/DC1 in OR internally with ENBUCK1 pin

(ignored in Normal Mode, active low in Microcontroller Mode).

59

ENLDO

IN

LDO regulator enable (active high).

Table 2. LQFP64 pin list (continued)

N#

Pin name

Pin type

Pin description