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参数资料
| 型号： | AS1340A-BTDT-10-1K |
| 厂商： | ams |
| 文件页数： | 10/17页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC ADJ 1.4A 8TDFN |
| 设计资源： | Design Support Tool |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.7 V ~ 50 V |
| 输入电压： | 2.7 V ~ 50 V |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 1.4A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-TDFN（3x3） |
| 其它名称： | AS1340A-BTDT-10-1KDKR |
AS1340
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
9 Application Information
The AS1340 has an operating voltage range from 2.7 to 5.5V. If the inductor is supplied from the same source the battery disconnect switch can
be used as well (see Figure 1 on page 1) . In case that a input voltage source is higher than 5.5V, the inductor can be supplied separately up to
50V (see Figure 28) , but then the battery disconnect switch cannot be used, because its operating voltage range is limited to 5.5V.
9.2 Shutdown
A logic low on pin EN shuts down the AS1340 and a logic high on EN powers on the device.
In shutdown mode the supply current drops to below 1μA to maximize battery life. In case that the battery disconnect switch is used, the battery
is disconnected from the output during shutdown.
Note: Pin EN should not be left floating. If the shutdown feature is not used, connect EN to V IN .
9.3 Battery Disconnect
The AS1340 has an integrated switch that can be used to disconnect the battery during shutdown. The operation voltage of this switch is limited
to 5.5V. 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
9.4 Setting Output Voltage
Output voltage can be adjusted by connecting a voltage divider between pins LX and FB (see Figure 28) .
Figure 28. Typical Application (SWVIN and SWOUT not in use)
Supply
(EQ 1)
2.7V to V OUT
C IN
10μF
3
6
L 1
4.7μH
V IN = 2.7V
to 5.5V
C 1
0.1μF
2
VCC
SWVIN
SWOUT
5
LX
D1
R 1
2.2M ?
C OUT
1μF
V OUT = 18V
4
POK
AS1340
8
FB
On
Off
1
EN
R 2
165k ?
7,9
GND
The output voltage can be adjusted by selecting different values for R 1 and R 2 . For R 2 , select a value between 10k and 200k ? .
Calculate R 1 by:
R 1 = R 2 ? ? ------------- – 1 ?
? V FB
V OUT
?
(EQ 2)
Where:
V OUT = V IN to 50V, V FB = 1.25V
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 ).
www.ams.com/DC-DC_Step-Up/AS1340
Revision 1.20
10 - 17
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相关代理商/技术参数 |
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| AS1340ABTDT10-1K | 制造商:ams 功能描述:TDFN 8 |
| AS1340A-BTDT-10-6K | 功能描述:IC REG BOOST SYNC ADJ 1.4A 8TDFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:50 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:5 V ~ 25 V 输入电压:2.3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:600kHz，1.2MHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 包装:管件 供应商设备封装:8-MSOP |
| AS1340A-TD-10_EK_S | 功能描述:AS1340 - DC/DC, Step Up 1, Non-Isolated Outputs Evaluation Board 制造商:ams 系列:- 零件状态:在售 主要用途:DC/DC，步升 输出和类型:1，非隔离 功率 - 输出:- 电压 - 输出:2.7 V ~ 50 V 电流 - 输出:100mA 电压 - 输入:2.7 V ~ 5.5 V 稳压器拓扑:升压 频率 - 开关:1MHz 板类型:完全填充 所含物品:板 使用的 IC/零件:AS1340 标准包装:1 |
| AS1340A-TD-10_EK_ST | 功能描述:AS1340 - DC/DC, Step Up 1, Non-Isolated Outputs Evaluation Board 制造商:ams 系列:- 零件状态:有效 主要用途:DC/DC，步升 输出和类型:1，非隔离 功率 - 输出:- 电压 - 输出:2.7 V ~ 50 V 电流 - 输出:100mA 电压 - 输入:2.7 V ~ 5.5 V 稳压器拓扑:升压 频率 - 开关:1MHz 板类型:完全填充 所含物品:板 使用的 IC/零件:AS1340 标准包装:1 |
| AS1341 | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:20V, 600mA, 100% Duty Cycle, Step-Down Converter |
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