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參數(shù)資料
| 型號： | TK65221MTL |
| 廠商： | TOKO INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR |
| 中文描述： | SWITCHING REGULATOR, PDSO6 |
| 封裝： | SOT-23L, SMT-6 |
| 文件頁數(shù)： | 17/20頁 |
| 文件大小： | 141K |
| 代理商： | TK65221MTL |
ADVANCED INFORMATION
January 1999 TOKO, Inc.
Page 17
TK652xx
THE AMOUNT OF BOARD SPACE NEEDED TO IMPLEMENT THIS STEP-DOWN CONVERTER
An evaluation board for this converter has been made using a TOKO D73 or D75 series inductor, using only 0.96 sq.
inches of board space. The artwork for the surface-mount circuit board is shown below in Figure 4.
FIGURE 4: TK652xx STEP-DOWN CONVERTER EVALUATION BOARD ARTWORK
SELECTING INPUT RESISTOR DIVIDER VALUES
Since the TK652xx draws so little quiescent current into V
IN
, relatively large resistance values can be used in the
input resistor divider. The following shows the relationship equation between V
BATT
and V
IN
pin of the TK652xx, and
an example method of finding the resistor values to be used in the resistor divider.
(1)
therefore:
and typical (I
Q
of V
IN
) = 15
μ
A and typical LBI trigger value of V
IN
= 1.1 V and letting R
1
= 10 k solving for R
2
:
then for the case of 4 NiMH cells picks a LBI trigger at V
BATT
= 4.4 V, then R
2
= 3.97 k
STEP-DOWN CONVERTER APPLICATION (CONT.)
G
G
VIN
VOUT
L
L
Actual Size
1.2 "
.
10 k x 1.25 V
V
BATT
- 1.25 V
R
2
=
(R
1
+ R
2
)
V
BATT
X R
2
V
IN
=
- R
1
x (I
Q
of V
IN
)
x [ V
IN
+ R
1
x (I
Q
of V
IN
)]
R
2
R
1
+ R
2
V
BATT
=
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相關(guān)代理商/技術(shù)參數(shù) |
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| TK65221MTL/21M | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR |
| TK65224 | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR |
| TK65224M | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR |
| TK65224MTL | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR |
| TK65224MTL/24M | 制造商:TOKO 制造商全稱:TOKO, Inc 功能描述:STEP-UP VOLTAGE CONVERTER WITH VOLTAGE MONITOR |
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