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参数资料
| 型号： | AS1332-BWLT |
| 厂商： | AUSTRIAMICROSYSTEMS AG |
| 元件分类： | DC/DC变换器 |
| 英文描述： | 650mA, RF Buck Converter, Vcon |
| 文件页数： | 15/19页 |
| 文件大小： | 1457K |
| 代理商： | AS1332-BWLT |
wwwaustriamcrosystems.com/DC-DC_Step-Down/AS1332
Revision 1.02
15 - 19
AS1332
Datasheet - Application Information
External Component Selection
Inductor Selection
For the external inductor, a 3.3μH inductor is recommend. Minimum inductor size is dependant on the desired effi-
ciency and output current. Inductors with low core losses and small DCR at 2MHz are recommended.
Capacitor Selection
A 10μF capacitor is recommend for C
IN
as well as a 4.7μF for C
OUT
. Small-sized X5R or X7R ceramic capacitors are
recommend as they retain capacitance over wide ranges of voltages and temperatures.
Input and Output Capacitor Selection
Low ESR input capacitors reduce input switching noise and reduce the peak current drawn from the battery. Also low
ESR capacitors should be used to minimize V
OUT
ripple. Multi-layer ceramic capacitors are recommended since they
have extremely low ESR and are available in small footprints.
For input decoupling the ceramic capacitor should be located as close to the device as practical. A 4.7μF input capaci-
tor is sufficient for most applications. Larger values may be used without limitations.
A 2.2μF to 10μF output ceramic capacitor is sufficient for most applications. Larger values up to 22μF may be used to
obtain extremely low output voltage ripple and improve transient response.
EN Pin Control
Drive the EN pin using the system controller to turn the AS1332 ON and OFF. Use a comparator, Schmidt trigger or
logic gate to drive the EN pin. Set EN high (>1.2V) for normal operation and low (<0.5V) for a 0.01μA (typ.) shutdown
mode. Set EN low to turn off the AS1332 during power-up and under voltage conditions when the power supply is less
than the 2.7V minimum operating voltage. The part is out of regulation when the input voltage is less than 2.7V.
Table 6. Recommended Inductors
Part Number
LPS4018-222ML_
LPS4018-332ML_
LPS4018-472ML_
L
DCR
0.070Ω
0.080Ω
0.125Ω
Current Rating Dimensions (L/W/T)
2.9A
2.4A
1.9A
Manufacturer
Coilcraft
www.coilcraft.com
2.2μH
3.3μH
4.7μH
3.9x3.9x1.7mm
3.9x3.9x1.7mm
3.9x3.9x1.7mm
Table 7. Recommended Capacitors for the Step-Down Converter
Part Number
GRM21BR60J226ME39
GRM21BR60J106KE01
GRM21BR61C475KA88
GRM188R61C225KE15
GRM188R61A225KE34
C
Voltage
6.3V
6.3V
16V
16V
10V
Type
X5R
X5R
X5R
X5R
X5R
Size
0805
0805
0805
0603
0603
Manufacturer
Murata
22μF10μF
4.7μF
2.2μF
2.2μF
C0603C475K8PAC7867
4.7μF
10V
X5R
0603
KEMET
www.kemet.com
相关PDF资料 |
PDF描述 |
|---|---|
| AS1333-BWLT | 650mA, RF, Buck Converter; Package Type: CS-WLP(1.5x1.5)-8; Output Range: 3.09V |
| AS1334-BTDT-30 | 650mA LowRipple Buck Converter |
| AS1335-BTDT-100 | 1.5A Buck Converter |
| AS1335-BTDT-AD | 1.5A Buck Converter |
| AS1339-BWLT | 650mA Buck+2x10mA LDOs RF-PA; Package Type: CS-WLP-16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1332-BWLT EB | 制造商:ams 功能描述:Evaluation Board |
| AS1333 | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:650mA, Step Down DC/DC Converter for Portable Applications |
| AS1333 EB | 制造商:AMS 功能描述:BOARD EVAL FOR AS1333 |
| AS1333-BWLT | 功能描述:IC REG BUCK SYNC 3.09V 8WLCSP 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 |
| AS1333-BWLT EB | 制造商:ams 功能描述:Evaluation Board |
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