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CY8C52LP Datasheet(PDF) 29 Page - Cypress Semiconductor

Part # CY8C52LP
Description  Programmable System-on-Chip (PSoC짰)
PDF  114 Pages
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY8C52LP Datasheet(HTML) 29 Page - Cypress Semiconductor

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PSoC® 5LP: CY8C52LP Family
Datasheet
Document Number: 001-84933 Rev. *L
Page 29 of 114
Figure 6-6. Application of Boost Converter powering PSoC device
The boost converter may also generate a supply that is not used
directly by the PSoC device. An example of this use case is
boosting a 1.8 V supply to 4.0 V to drive a white LED. If the boost
converter is not supplying the PSoC devices VDDA, VDDD, and
VDDIO it must comply with the same design rules as supplying
the PSoC device, but with a change to the bulk capacitor
requirements. A parallel arrangement 22 µF, 1.0 µF, and 0.1 µF
capacitors are all required on the Vout supply and must be
placed within 1 cm of the VBOOST pin to ensure regulator
stability.
Figure 6-7. Application of Boost Converter not powering PSoC device
The switching frequency is set to 400 kHz using an oscillator
integrated into the boost converter. The boost converter can be
operated in two different modes: active and standby. Active
mode is the normal mode of operation where the boost regulator
actively generates a regulated output voltage. In standby mode,
most boost functions are disabled, thus reducing power
VBOOST
VBAT
VSSB
IND
VDDD
VDDA
VDDIO0
VSSA
VSSD
Boost
Logic
VDDIO1
VDDIO2
VDDIO3
0.1 µF
0.1 µF
0.1 µF
0.1 µF
22 µF
0.1 µF
0.1 µF
1.0 µF
1.0 µF
22 µF
4.7 µH
10 µH
22 µH
Schottky, 1A
VDDD
0.1 µF
1.0 µF
All components and values are required
0.5–3.6 V
PSoC
External
Load
VBOOST
VBAT
VSSB
IND
VDDD
VDDA
VDDIO0
VSSA
VSSD
Boost
Logic
VDDIO1
VDDIO2
VDDIO3
22 µF
4.7 µH
10 µH
22 µH
Schottky, 1A
VDDD
All components and values are required
0.5–3.6 V
22 µF
0.1 µF
1.0 µF
VDDA, VDDD, and
VDDIO connections
per section 6.2
Power System.
VOUT
PSoC
External
Load



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