BL8505
High Efficiency PFM Step-up DC/DC Converter
Outline
Features
Applications
Selection Guide
BL8505
XX
X
XX
package
Pin Configurations
Function description
Output voltage
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Ver1.1
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BL8505
Pin Description:
Pin No.
SOT-89-3
TO-92
SOT-23-3
SOT-89-5
SOT-23-5
Symbol
Description
Product List:
Product Name
Output Voltage
LX Tr. Driver
Chip Enable
Package
Block Diagram
Absolute Maximum Ratings:
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Ver1.1
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BL8505
Recommended Operating Conditions:
Min
Nom
Max
Unit
*Suggestion
Electrical Characteristics:
Symbol
Item
Test Conditions
Reference Data
Min
Typ.
Max
Unit
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Ver1.1
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BL8505
Typical Characteristics
Detailed Description:
Selection Of The External Components:
D
1
Inductor Selection
Vout Vin
Vout
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Ver1.1
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BL8505
L
min
D
(1
D
)
2
R
L
2
f
Lmin
D Vin
Lf
Vin
Im
ax
(1
D
)
2
R
L
I
DVin
2
Lf
r
L
R
load
(1
D
)
2
2
Capacitor Selection
r
Vout
Vout
D
R
load
Cf
r
'
r
Im
ax R
ESR
Vout
3
Diode Selection
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Ver1.1
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