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| 型号： | AS1334-BTDT |
| 厂商： | ams |
| 文件页数： | 14/19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 Application Information
9.1 Inductor Selection
For the external inductor, a 3.3μH inductor is recommended. Minimum inductor size is dependant on the desired efficiency and output current.
Inductors with low core losses and small DCR at 2MHz are recommended.
Table 5. Recommended Inductor
Part Number
LPS4018-222ML_
LPS4018-332ML_
LPS4018-472ML_
L
2.2μH
3.3μH
4.7μH
DCR
0.070Ω
0.080Ω
0.125Ω
Current Rating
2.9A
2.4A
1.9A
Dimensions (L/W/T)
3.9x3.9x1.7mm
3.9x3.9x1.7mm
3.9x3.9x1.7mm
Manufacturer
Coilcraft
9.2 Capacitor Selection
A 10μF capacitor is recommended for C IN as well as a 10μF for C OUT . Small-sized X5R or X7R ceramic capacitors are recommended as they
retain capacitance over wide ranges of voltages and temperatures.
9.2.1
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 capacitor 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 out-
put voltage ripple and improve transient response.
Table 6. Recommended Input and Output Capacitor
Part Number
GRM188R60J475KE19
GRM219R60J475KE19
GRM21BR61C475KA88
GRM31CR71E475KA88
GRM188R60J106ME47
GRM21BR60J106KE19
GRM21BR61A106KE19
GRM32DR71C106KA01
GRM21BR60J226ME39
GRM32ER71A226KE20
C
4.7μF
4.7μF
4.7μF
4.7μF
10μF
10μF
10μF
10μF
22μF
22μF
TC Code
X5R
X5R
X5R
X7R
X5R
X5R
X5R
X7R
X5R
X7R
Rated Voltage
6.3V
6.3V
16V
25V
6.3V
6.3V
10V
16V
6.3V
10V
Dimensions (L/W/T)
0603
0805
0805
1206
0603
0805
0805
1210
0805
1210
Manufacturer
Murata
9.3 EN Pin Control
Drive the EN pin using the system controller to turn the AS1334 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 AS1334 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.
Revision 1.09
13 - 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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