參數(shù)資料
型號(hào): SPX1202R-1.5
英文描述: MB 3C 3#16 PIN RECP
中文描述: npn型600mA的低壓差穩(wěn)壓器
文件頁(yè)數(shù): 5/11頁(yè)
文件大小: 205K
代理商: SPX1202R-1.5
5
Date: 5/25/04 SPX1202 600mA Low Dropout Positive Linear Regulator
Copyright 2004 Sipex Corporation
PC BOARD
AREA mm
2
TOPSIDE COPPER BACKSIDE COPPER
AREA mm
2
THERMAL RESISTANCE
JUNCTION TO AMBIENT
°
C/W
AREA mm
2
2500
2500
2500
2500
2500
1600
2500
2500
1600
900
900
2500
1250
950
2500
1800
600
1250
915
600
240
240
2500
2500
2500
46
47
49
51
53
55
58
59
67
72
85
0
0
1600
0
0
0
900
0
Figure 8. 600mA Current Source
Figure 9. Typical Adjustable Regulator
LOAD
ADJ
SPX1202
V
IN
C
1
OUT
IN
4.7
μ
F
C
2
I
OUT
R
1
V
REF
R
1
I
OUT
=
+
IN
OUT
I
ADJ
50
μ
A
SPX1202
C
1
R
1
R
2
V
OUT
V
IN
C
2
V
OUT
= V
REF
(1+R
2
/R
1
) +I
ADJ
R
2
V
REF
ADJ
4.7
μ
F+
tude of the output ripple will be independent of
the output voltage. If an ADJ-bypass capacitor
is not used, the output ripple will be proportional
to the ratio of the output voltage to the reference
voltage:
M = V
OUT
/ V
REF
Where M = multiplier for the ripple seen when
the ADJ pin is optimally bypassed.
V
REF
=1.25V
Output Voltage
The output of the adjustable regulator can be set
to any voltage between 1.25V and 15V. The
value of V
can be quickly approximated
using the formula. (Figure 9)
V
OUT
=1.25 *(R
1
+ R
2
)/R
1
.
A small correction to this formula is required
depending on the values of resistors R1 and R2,
since adjustable pin current (approx 50
μ
A) flows
through R2. When I
ADJ
is taken into account, the
formula becomes
V
= V
REF
(1+ (R
2
/R
1
)) + I
ADJ
* R
2
,
where V
REF
=1.25V.
TYPICAL APPLICATIONS
Table 1
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