L6722TR STMicroelectronics, L6722TR Datasheet - Page 15

• Manufacturer Part Number: L6722TR
• Description: IC BUCK ADJ 2A TRPL 36VFQFPN
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L6722TR

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 3
• Voltage - Output: Adj to 0.8V
• Current - Output: 2A
• Frequency - Switching: 100kHz
• Voltage - Input: 12V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 36-VFQFN, 36-VFQFPN
• Power - Output: 3.5W
• Operating Temperature Range: - 40 C to + 125 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5904-2

L6722
●
External gate resistors helps the device to dissipate the switching power since the same power
P
a general cooling of the device.
SW
Drivers' power is the power needed by the driver to continuously switch on and off the
external mosfets; it is a function of the switching frequency and total gate charge of the
selected mosfets. It can be quantified considering that the total power P
switch the mosfets (easy calculable) is dissipated by three main factors: external gate
resistance (when present), intrinsic mosfet resistance and intrinsic driver resistance. This
last term is the important one to be determined to calculate the device power dissipation.
The total power dissipated to switch the mosfets results:
will be shared between the internal driver impedance and the external resistor resulting in
SW
=
3
⋅
F
SW
⋅
(
Q
GHS
⋅
V
BOOT
+
Q
GLS
⋅
V
CC
SW
dissipated to
5 Driver section
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