Document
BL8550
400mA Low Dropout Voltage Regulator
Outline:
BL8550 is a series of low dropout three terminal regulators with a dropout of 1.22V at 400mA load current.
Other than a fixed version(Vout= 1.8V,2.5V,2.85V,3.3V,5V), BL8550 has an adjustable version, which can provide an output voltage from 1.25 to 13.8V with only two external resistors.
BL8550 offers thermal shut down and current limit functions, to assure the stability of chip and power system. And it uses trimming technique to guarantee output voltage accuracy within ±2%.
BL8550 is available in SOT-89-3 power Package. Lead free package is also available on command.
Selection Guide:
BL8550-XX X X
Package Type: A:SOT-89-3 B:SOT-89-3 C:SOT-89-3
Features:
• Other than a fixed version and an
adjustable version, output value can be customized on command.
• Maximum output current is 400mA • Output voltage accuracy is within ±2% • Range of operation input voltage: Max
18V
• Line regulation: 0.2% • Load regulation: 0.4% • Storage Temperature: -50℃~140℃
Applications:
• Power Management for Computer
Mother Board, Graphic Card
• LCD Monitor and LCD TV • DVD Decode Board •
Pin Assignment:
Product Type BL8550-□□CA
Pin configuration
BL8550-□□CB
Temperature Range:
C:Standard( default )
P:Standard ( customized,
Lead free Package)
BL8550-□□CC
Output Voltage: 18……1.8V 25……2.5V 28……2.85V 33……3.3V 50……5.0V
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1/29/2008
Product Classfication:
Product Name BL8550-18CA BL8550-25CA BL8550-28CA BL8550-33CA BL8550-50CA BL8550-18CB BL8550-25CB BL8550-28CB BL8550-33CB BL8550-50CB BL8550-18CC BL8550-25CC BL8550-28CC BL8550-33CC BL8550-50CC
Output Value 1.8 V 2.5 V 2.85 V 3.3 V 5.0V 1.8 V 2.5 V 2.85 V 3.3 V 5.0V 1.8 V 2.5 V 2.85 V 3.3 V 5.0V
Block Diagrams:
Package type SOT-89-3 SOT-89-3 SOT-89-3 SOT-89-3 SOT-89-3 SOT-89-3 SOT-89-3 SOT-89-3 SOT-89-3 SOT-89-3 SOT-89-3 SOT-89-3 SOT-89-3 SOT-89-3 SOT-89-3
BL8550
Package Marking
Absolute Maximum Ratings:
Maximum Input Voltage----------------------------------------------------------------------------18V Operating Junction Temperature (TJ) ----------------------------------------------------------150°C Environment Temperature (TA) ------------------------------------------------------------------85°C Storage Temperature (Ts)--------------------------------------------------------------------------50~140°C Lead Temperature and Time ---------------------------------------------------------------------260°C,10S
Power Dissipation SOT-89-3------------------------------------------------------------------------------------------ 0.5W
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- 2Total 6 Pages
1/29/2008
BL8550
Recommended Work Conditions:
Item Input Voltage Range Operating junction Temperature
Min
Recommended
Max
18
-40
125
Units V °C
Electrical Characteristics (Table 1):
Symbol
Vout
∆Vout
∆Vout
Dropout Voltage Current
Limit Iq
∆Vout ∆T ⋅Vout
Prameter
Output Voltage
Line Regulation (note1)
Load Regulatiion (note1,2) Input-Out.