PM6686TR STMicroelectronics, PM6686TR Datasheet - Page 28

• Manufacturer Part Number: PM6686TR
• Description: IC CTLR DUAL STEP DOWN VFQFPN32
• Manufacturer: STMicroelectronics

Specifications of PM6686TR

• Applications: Controller, Notebook Computers
• Voltage - Input: 5.5 ~ 28 V
• Number Of Outputs: 2
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN, 32-VFQFPN
• Output Voltage: 5.5 V
• Output Current: 100 mA
• Output Power: 4.3 mW
• Input Voltage: 5.5 V to 28 V
• Switching Frequency: 33 KHz
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-8522-2

Device description
8.1.3
28/50
PWM
PWM implements the continuous current mode (CCM). During T
is turned on and the inductor current starts increasing. When the Ton is elapsed the high-
side MOSFET is turned off and after a dead time during which neither MOSFET conducts,
the low-side MOSFET turns on. The inductor current decreases until these three conditions
are verified:
●
●
●
When these conditions are satisfied a new T
PWM operation mode has a quasi-constant switching frequency, avoiding any audible noise
issue and the continuous current mode assures better load transitions despite of a lower
efficiency at light loads.
Figure 47.
Output voltage reaches the regulation voltage
Inductor current is below the current limit
T
OFFMIN
Inductor
current
Output
voltage
Vreg
Inductor current and output voltage in PWM mode
is elapsed
Ton
Doc ID 15281 Rev 4
Toff
ON
starts.
ON
, the high-side MOSFET
t
PM6686