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SC70 数据表(PDF) 9 Page - Diodes Incorporated

部件名 SC70
功能描述  0.6V ENHANCED ADJUSTABLE PRECISION SHUNT REGULATOR
PDF  15 Pages
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制造商  DIODES [Diodes Incorporated]
网页  http://www.diodes.com
标志 DIODES - Diodes Incorporated

SC70 数据表(HTML) 9 Page - Diodes Incorporated

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ZXRE160
Document number: DS35688 Rev. 2 - 2
9 of 15
www.diodes.com
June 2012
© Diodes Incorporated
ZXRE160
A Product Line of
Diodes Incorporated
Application Information (cont.)
REF
OUT
V
V
=
Figure 6. 0.6V Series LDO Regulator
⎟
⎠
⎞
⎜
⎝
⎛ +
=
2
R
1
R
1
V
V
REF
OUT
Figure 7. 1.0V Series LDO Regulator
Design guide:
1.
Determine IOUT and choose a suitable transistor taking power dissipation into consideration.
2.
Determine IB from
)
1
h
(
I
I
(min)
FE
(max)
OUT
B
+
=
3.
Determine IR3 from
(min)
KA
I
B
I
3
R
I
+
≥
. The design of the ZXRE160 effectively means there is no IKA(min) limitation as in conventional
references. There is only an output leakage current which is a maximum of 1µA. Nevertheless, it is necessary to determine an IKA(min) to
ensure that the device operates within its linear range at all times. IKA(min) ≥ 10µA should be adequate for this.
4.
Determine R3 from
3
R
BE
OUT
IN
I
)
V
V
(
V
3
R
+
−
=
.
Although unlikely to be a problem, ensure that IR3 ≤ 15 mA.



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