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| 型号： | AS1334-BTDT |
| 厂商： | ams |
| 文件页数： | 15/19页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.65A 8TDFN |
| 设计资源： | Design Support Tool |
| 标准包装： | 1,000 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.2 V ~ 3.4 V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 2MHz |
| 电流 - 输出： | 650mA |
| 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： | 带卷 (TR) |
| 供应商设备封装： | 8-TDFN（3x3） |
AS1334
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
9.4 Layout Considerations
The AS1334 converts higher input voltage to lower output voltage with high efficiency. This is achieved with an inductor based switching
topology. During the first half of the switching cycle, the internal PMOS switch turns on, the input voltage is applied to the inductor, and the
current flows from PVDD line to the output capacitor (C2) through the inductor. During the second half cycle, the PMOS turns off and the internal
NMOS turns on. The inductor current continues to flow via the inductor from the device PGND line to the output capacitor (C2). Referring to
Figure 24 , the AS1334 has two major current loops where pulse and ripple current flow. The loop shown in the left hand side is most important,
because pulse current shown in Figure 24 flows in this path. The right hand side is next. The current waveform in this path is triangular, as shown
in Figure 24 . Pulse current has many high-frequency components due to fast di/dt. Triangular ripple current also has wide high-frequency
components. Board layout and circuit pattern design of these two loops are the key factors for reducing noise radiation and stable operation.
Other lines, such as from battery to C1(+) and C2(+) to load, are almost DC current, so it is not necessary to take so much care. Only pattern
width (current capability) and DCR drop considerations are needed.
Figure 24. Current Loop
V IN
3.25V to 5.5V
i
f OSC = 2MHz
+ C1
- 10 μF
EN
PV IN
PGND
VDD
SGND
i
SW
FB
C2
10 μF
L1
3.3 μH
+
-
V OUT
POK
Revision 1.09
14 - 18
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1334-BTDT-12 | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:650mA, Ultra low Ripple Step Down DC/DC Converter |
| AS1334-BTDT-15 | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:650mA, Ultra low Ripple Step Down DC/DC Converter |
| AS1334-BTDT-18 | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:650mA, Ultra low Ripple Step Down DC/DC Converter |
| AS1334-BTDT-25 | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:650mA, Ultra low Ripple Step Down DC/DC Converter |
| AS1334-BTDT-30 | 功能描述:IC REG BUCK SYNC 3V 0.65A 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 |
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