EVALPM6680A STMicroelectronics, EVALPM6680A Datasheet - Page 23
EVALPM6680A
Manufacturer Part Number
EVALPM6680A
Description
EVAL BOARD FOR PM6680A
Manufacturer
STMicroelectronics
Datasheet
1.PM6680ATR.pdf
(48 pages)
Specifications of EVALPM6680A
Mfg Application Notes
PM6680A, AN2565 Appl Note
Main Purpose
DC/DC, Step Down with LDO
Outputs And Type
3, Non-Isolated
Power - Output
10.5W
Voltage - Output
1.8V, 3.3V, 5V
Current - Output
2.5A, 2.5A, 100mA
Voltage - Input
6 ~ 36V
Regulator Topology
Buck
Frequency - Switching
200kHz, 300kHz
Board Type
Fully Populated
Utilized Ic / Part
PM6680A
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-6263
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
PM6680A
7.5
No-audible skip mode
If SKIP pin is tied to V
33 kHz is enabled. At light load condition, If there is not a new switching cycle within a 30 µs
(typ.) period, a no-audible skip mode cycle begins.
Figure 32. No audible skip mode
The low side switch is turned on until the output voltage crosses about Vreg + 1 %. Then the
high side MOSFET is turned on for a fixed on time period. Afterwards the low side switch is
enabled until the inductor current reaches the zero-crossing threshold. This keeps the
switching frequency higher than 33 kHz. As a consequence of the control, the regulated
voltage can be slightly higher than Vreg (up to 1 % ).
If, due to the load, the frequency is higher than 33 kHz, the device works like in skip mode.
No-audible skip mode reduces audio frequency noise that may occur in pulse skip mode at
very light loads, keeping the efficiency higher than in PWM mode.
REF
, a no-audible skip mode with a minimum switching frequency of
µ
Device description
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