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L6995

8

VFB

PWM comparator feedback input. Short this pin to INT pin when using the integrator function, or

to VSENSE pin without integrator.

9

OSC

Connect this pin to the input voltage through a voltage divider in order to provide the feed-

forward function. It cannot be left floating.

10

SS

Soft start pin. A 5

µA constant current charges an external capacitor which value sets the soft-

start time.

11

ILIM

An external resistor connected between this pin and GND sets the current limit threshold.

12

SHDN

Shutdown. When shorted to GND the device stops working; when high, it enables the normal

operation. It cannot be left floating.

13

OVP

Open drain output. When in OVP condition, the internal transistor goes off. Connect this pin to

14

PGOOD

Open drain output. The internal transistor is on during soft-start or in case of output voltage

15

PGND

Low Side driver ground.

16

LGATE

Low Side driver output.

17

Low Side driver supply.

18

PHASE

Return path of the High Side driver.

19

HGATE

High side MOSFETS driver output.

20

BOOT

Bootstrap capacitor pin. High Side driver is supplied through this pin.

ELECTRICAL CHARACTERISTICS

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

SUPPLY SECTION

Vin

Input voltage range

Vout=Vref Fsw=110Khz Iout=1A

1.5

28

V

4.5

5.5

V

Turn-onvoltage

4.2

4.4

V

Turn-off voltage

4.1

4.3

V

Iqcc

Driver quiescent current

VFB > VREF

20

µA

Iqcc

(Vcc)

Quiescent current

VFB > VREF

600

µA

SHUTDOWN SECTION

SHDN

Device On

1.2

V

Device Off

0.6

V

Driver quiescent current in

shutdown

SHDN to GND

5

µA

Shut down current

SHDN to GND

15

µA

SOFT START SECTION

Soft Start current

4

6

µA

SS Clamp Voltage

4

V

ON TIME

Ton

On time duration

VREF=VSENSE OSC=250mV

850

950

1050

ns

PIN FUNCTION (continued)

N°

Name

Description