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參數(shù)資料
| 型號(hào)： | AS1343A-BTDT-10 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | DC/DC變換器 |
| 英文描述： | 42V, 1MHz, Single Cell, Boost; Package Type: TDFN(3x3)-10; Temperature Range: -40 - +85 °C; Dimension: 3 x 3 mm; Shutdown: Yes; Output Current: 140mA; Output Range: 5.5 to 42V; Supply Voltage: 0,90-3,60 |
| 封裝： | TDFN(3x3)-10 |
| 文件頁(yè)數(shù)： | 10/17頁(yè) |
| 文件大?。?/td> | 1074K |
| 代理商： | AS1343A-BTDT-10 |
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Revision 1.04
10 - 17
AS1343
Datasheet - Application Information
9 Application Information
Shutdown and Output Discharge
A logic low on the EN pin shuts down the AS1343 and a logic high on the EN pin powers on the device. In shutdown
mode the supply current drops to below 3μA and the POK pin is set to high impedance to maximize battery life.
When the battery disconnect switch is used, the battery is disconnected from the output and the output is discharged
down to 0V. The time for fully discharging the output depends on the C
OUT
and on the load.
Note:
Pin EN should not be left floating. If the shutdown feature is not used, connect EN to V
CC
. The output will be
discharged during shutdown but the output also must be fully discharged before the device is enabled again.
Battery Disconnect
The AS1343 has an integrated PMOS switch that can be used to disconnect the battery during shutdown. The opera-
tion voltage of this switch is limited to 3.6V. When EN is high, the switch is closed and supplies the inductor. Due to the
R
ON
resistance the efficiency is slightly lower if the battery disconnect switch is used.
P
LOSS
= I
IN
2 x
R
ON
(EQ 1)
Setting Output Voltage
Output voltage can be adjusted by connecting a voltage divider between pins
VOUT
and FB
(see Figure 28)
.
Figure 28. Typical Application
The output voltage can adjusted by selecting different values for R
1
and R
2
. For R
2
, select a value between 10k and
200k
Ω
.
Calculate R
1
by:
R
1
R
2
=
Where:
V
OUT
= 5.5V to 42V, V
FB
= 1.25V; V
OUT
> V
IN
The input bias current of FB has a maximum value of 100nA which allows for large-value resistors. For less than 1%
error, the current through R
2
should be 100 times the feedback input bias current (I
FB
). That’s why the feeback current
can be neglected in the calculation of V
OUT
.
Note:
For the optimal operation condition the following ratio between V
OUT
and V
IN
should be used:
V
OUT
1
EN
3, 8
GND
4
V
CC
10
FB
6
LX
On
Off
R
1
2.2M
Ω
V
OUT
= 18V
AS1343
L
1
6.8μH
C
1
10μF
V
CC
= 0.9V
to 3.6V
D1
C
OUT
4.7μF
R
2
165k
Ω
7
SWOUT
5
PGND
9
VOUT
2
POK
R
3
100k
Ω
(EQ 2)
V
FB
--------------
1
–
(EQ 3)
V
IN
÷
12
≤
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PDF描述 |
|---|---|
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| AS1352-7BC0-T | Quad LDO with OTP 1.8 to 3.3V; Package Type: QFN(4x4)-12; Output Range: 1,8V; Output Range: 2,5V; Output Range: 2,9V; Output Range: 3,0V |
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| AS1352-T | Quad LDO with OTP 1.8 to 3.3V; Package Type: QFN(4x4)-12; Output Range: 4 x 3,3V |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AS1343A-BTDT-10-1K | 功能描述:IC REG BOOST ADJ 1.4A 10TDFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:5 V ~ 25 V 輸入電壓:2.3 V ~ 5.5 V PWM 型:電流模式 頻率 - 開關(guān):600kHz，1.2MHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 包裝:管件 供應(yīng)商設(shè)備封裝:8-MSOP |
| AS1343A-BTDT-10-6K | 制造商:ams 功能描述:T&R / TDFN 8 |
| AS1343A-TD-10_EK_ST | 功能描述:AS1343 - DC/DC, Step Up 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，步升 輸出和類型:1，非隔離 功率 - 輸出:- 電壓 - 輸出:12V 或 18V 電流 - 輸出:40mA 電壓 - 輸入:0.9 V ~ 3.6 V 穩(wěn)壓器拓?fù)?升壓 頻率 - 開關(guān):1MHz 板類型:完全填充 所含物品:板 使用的 IC/零件:AS1343 標(biāo)準(zhǔn)包裝:1 |
| AS1343-EB | 制造商:ams 功能描述:AS1343 Evaluation Board |
| AS1344 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:42V, DC-DC Boost Converter with adjustable Softstart |
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