参数资料
| 型号： | AS1339-BWLT |
| 厂商： | ams |
| 文件页数： | 22/26页 |
| 文件大小： | 0K |
| 描述： | IC CONV BUCK 650MA 16-WLP |
| 标准包装： | 1 |
| 应用： | 转换器，WCDMA、NCDMA 功率放大器应用 |
| 输入电压： | 2.7 V ~ 5.5 V |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 3.85 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-UFBGA，WLCSP |
| 供应商设备封装： | 16-WLP（2x2） |
| 包装： | 标准包装 |
| 其它名称： | AS1339-BWLTDKR |
AS1339
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
Figure 52. Efficiency Comparison of different
Inductors; V IN = 3.9V, V OUT = 1.0V
100
90
80
70
60
50
40
Figure 53. Efficiency Comparison of different
Inductors; V IN = 3.9V, V OUT = 1.5V
100
90
80
70
60
50
40
30
20
10
0
MLP2520S1R5S
MLP2520S2R2S
MLP2520S3R3S
EPL2014-222
EPL2014-332
EPL2014-472
30
20
10
0
MLP2520S1R5S
MLP2520S2R2S
MLP2520S3R3S
EPL2014-222
EPL2014-332
EPL2014-472
10
100
1000
10
100
1000
V REF = ------------- = 1 , 2 V
Output Current (mA)
Example
The following system should be designed:
- A supply with a Lithium-Ion Battery = 4.5V
- V OUT = 3.0V
- I OUTMAX = 500mA
V OUT
2 , 5
V IN ≤ 2 , 69 × V REF
Output Current (mA)
(EQ 5)
(EQ 6)
Due to Equation (EQ 6) : V IN = 3.23V
Hence a 2.2μH coil is used, Δ I L can be calculated with Equation (EQ 3) : Δ I L = 227mA
With this result I MAX can be calculated with Equation (EQ 4) : I MAX = 614mA.
The saturation current of the coil should be chosen slightly higher than I MAX because heavy load transients could
increase the peak current. For a short period of time (~50μs) the peak inductor current can rise up to a value of approx-
imately 1.1A (p-channel MOSFET peak current limit). In this case a coil with a rated saturation current of ~800mA can
be chosen.
Revision 1.05
21 - 25
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1339-DB | 制造商:ams 功能描述:Evaluation Board |
| AS1339-EB | 功能描述:电源管理IC开发工具 AS1339 Evaluation Board RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| AS133R0HLF | 制造商:TT Electronics / IRC 功能描述:AS133R0HLF |
| AS133R0JLF | 制造商:TT Electronics / IRC 功能描述:AS133R0JLF |
| AS133R2FLF | 制造商:TT Electronics / IRC 功能描述:AS133R2FLF |
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