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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 5µA 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
V
CC
through a resistor.
14 PGOOD Open drain output. The internal transistor is on during soft-start or in case of output voltage
faults. Connect this pin to V
CC
through a resistor.
15 PGND Low Side driver ground.
16 LGATE Low Side driver output.
17 V
DR
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
(V
CC
= V
DR
= 5V; T
am b
= 0°C to 85°C unless otherwise specified)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SUPPLY SECTION
Vin Input voltage range Vout=Vref Fsw=110Khz Iout=1A 1.5 28 V
V
CC
,
V
DR
4.5 5.5 V
V
CC
Turn-onvoltage 4.2 4.4 V
Tur n-off voltage 4.1 4.3 V
Iqcc
(V
DR
)
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
I
SH
(V
DR
)
Driver quiescent current in
shutdown
SHDN to GND 5 µA
I
SH
(V
CC
)
Shut down current SHDN to GND 15 µA
SOFT START SECTION
I
SS
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
