Datasheet > AS1334-BTDT-15

AS1334-BTDT-15

更新时间： 2024-01-23 05:25:59

品牌	Logo	应用领域
艾迈斯 - AMSCO		转换器
页数	文件大小	规格书
17页	1733K
描述
650mA, Ultra low Ripple Step Down DC/DC Converter

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AS1334-BTDT-15 技术参数

是否无铅：	不含铅	生命周期：	Active
Reach Compliance Code：	unknown	风险等级：	5.74
Is Samacsys：	N	Base Number Matches：	1

AS1334-BTDT-15 数据手册

AS1334

Datasheet - Application Information

9 Application Information

Inductor Selection

For the external inductor, a 3.3µH inductor is recommended. 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.

Table 5. Recommended Inductor

Part Number

DCR

Current Rating Dimensions (L/W/T)

Manufacturer

Coilcraft

www.coilcraft.com

LPS4018-222ML_

LPS4018-332ML_

LPS4018-472ML_

2.2µH

3.3µH

4.7µH

0.070Ω

0.080Ω

0.125Ω

2.9A

2.4A

1.9A

3.9x3.9x1.7mm

Capacitor Selection

A 10µF capacitor is recommended for CIN as well as a 10µF for COUT. Small-sized X5R or X7R ceramic capacitors are

recommended 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 VOUT 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.

Table 6. Recommended Input and Output Capacitor

Part Number

TC Code Rated Voltage Dimensions (L/W/T)

Manufacturer

Murata

www.murata.com

GRM188R60J475KE19

GRM219R60J475KE19

GRM21BR61C475KA88

GRM31CR71E475KA88

GRM188R60J106ME47

GRM21BR60J106KE19

GRM21BR61A106KE19

GRM32DR71C106KA01

GRM21BR60J226ME39

GRM32ER71A226KE20

4.7µF

10µF

22µF

X5R

X7R

X5R

X7R

X5R

X7R

6.3V

16V

25V

6.3V

10V

16V

6.3V

10V

0603

0805

1206

0603

0805

1210

0805

1210

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.

www.austriamicrosystems.com

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