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參數(shù)資料
| 型號： | AS1324-BTTT-AD |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 600mA Buck Converter; Package Type: TSOT23-5; Output Range: 0.6V to Vin |
| 封裝： | TSOT23-5 |
| 文件頁數(shù)： | 15/20頁 |
| 文件大?。?/td> | 970K |
| 代理商： | AS1324-BTTT-AD |
15 - 20
AS1324
Datasheet - Application Information
9.9 Design Example
Figure28
shows the AS1324 used in a single lithium-ion (3.7V typ) battery-powered mobile phone application. The load current requirement is
600mA (max) but most of the time the device will require only 2mA (standby mode current).
Figure 28. Design Example
For the circuit shown in
Figure28
, efficiency at low- and high-load currents is an important consideration when selecting the value for the
external inductor, which is calculated as:
V
f
Δ
I
L
From
(EQ 14)
, substituting V
OUT
= 2.2V, V
IN
= 3.7V,
Δ
I
L
= 240mA and f = 1.5MHz gives:
Therefore, a standard 2.2μH inductor should be used for this design.
For best overall efficiency use an inductor with a rating of 720mA or greater and less than 0.2
Ω
series resistance. C
IN
will require an RMS
current rating of at least 0.3A
I
LOAD(MAX)
/2, whereas C
OUT
will require an ESR of less than 0.25
Ω
. In most cases, a ceramc capacitor will
satisfy this requirement.
For the feedback resistors, select the value for R
1
= 375k
Ω
. R
2
can then be calculated from
(EQ 7)
to be:
R
2
= (V
OUT
/0.6 - 1)375k = 1000k
Ω
C
OUT
10μF
CER
C
IN
4.7μF
CER
V
IN
3.7V
V
OUT
2.2V
2.2μH
375k
Ω
22pF
1M
Ω
R
2
R
1
AS1324
3
SW
4
V
IN
1
EN
5
V
FB
GND
2
(EQ 14)
L
--------------
1
V
V
IN
--------------
–
×
=
(EQ 15)
L
1,5MHz
240mA
(
)
----------------------------------------------------
1
3 7V
,
------------
–
×
2,48
μ
H
=
=
相關PDF資料 |
PDF描述 |
|---|---|
| AS1324-BTTT-12 | 600mA Buck Converter; Package Type: TSOT23-5; Output Range: 1.2V |
| AS1324-BTTT-15 | 600mA Buck Converter; Package Type: TSOT23-5; Output Range: 1.5V |
| AS1324-BTTT-18 | 600mA Buck Converter; Package Type: TSOT23-5; Output Range: 1.8V |
| AS1326A-BTDT | Adj. 650mA, 1MHz, Boost |
| AS1326B-BTDT | Adj. 650mA, 1MHz, Boost; Package Type: TDFN(3x3)-10; Miscellaneous: Logic-High On |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AS1324-TT-AD_EK_ST | 功能描述:AS1324-AD - DC/DC, Step Down 1, Non-Isolated Outputs Evaluation Board 制造商:ams 系列:- 零件狀態(tài):有效 主要用途:DC/DC，步降 輸出和類型:1，非隔離 功率 - 輸出:- 電壓 - 輸出:1.8V 電流 - 輸出:600mA 電壓 - 輸入:2.7 V ~ 5.5 V 穩(wěn)壓器拓撲:降壓 頻率 - 開關:1.5MHz 板類型:完全填充 所含物品:板 使用的 IC/零件:AS1324-AD 標準包裝:1 |
| AS1325 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:300mA Step-Up DC-DC Converter |
| AS1325-33 EB | 功能描述:BOARD EVAL AS1325-33 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓撲結(jié)構:升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| AS1325-33-EB | 制造商:ams 功能描述:AS1325-33 Evaluation Board |
| AS1325-33-T | 制造商:ams 功能描述:300/185mA step-up DC-DC converter with a fixed output voltage of +3.3V/5.0V, (T/R) |
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