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BL8071

ELECTRICAL CHARACTERISTICS

Symbol

Parameter

Conditions

Min

Typ

Max

Units

Input Voltage

1.5*

6

V

Output

Voltage

X0.98

X1.02

V

-0.03

+0.03

Maximum Output Current

1.5

A

Dropout Voltage

300

500

mV

Vout

Vin

Vout







Line Regulation

0.05

0.2

%/V

Vout



Load Regulation

30

60

mV

Is

Supply Current

100

150

uA

Vout

T

Vout







Output

Voltage

Temperature Coefficient

±100

ppm/C

PSRR

Ripple Rejection

f=100Hz, Ripple=0.5Vp-p,

70

dB

en

Output Noise

BW=10Hz~100KHz

44

uVrms

Note: *Iout=500mA@Vout=1.2V

should be controlled to a certain range to ensure the normal operation.

THERMAL CONSIDERATIONS

We have to take heat dissipation into great consideration when output current or differential voltage of input and

output voltage is large. Because in such cases, the power dissipation consumed by BL8071 is very large. BL8071 series

uses SOT-223 package type and its thermal resistance is about 20°C/W. And the copper area of application board can

affect the total thermal resistance. If copper area is 5cm*5cm (two sides), the resistance is about 30°C/W. So the total

thermal resistance is about 20°C/W + 30°C/W. In this case, the power dissipation should be limited less than 1.2W. We

can decrease total thermal resistance by increasing copper area in application board. When there is no good heat

dissipation copper are in PCB, the total thermal resistance will be as high as 120°C/W, then the power dissipation of

BL8071 could allow on itself is less than 1W. And furthermore, BL8071 will work at junction temperature higher than

125°C under such condition and no lifetime is guaranteed.

CURRENT LIMIT MODE

Current Limit module can keep chip and power system away from danger when load current is too