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參數(shù)資料
| 型號： | AOZ1014 |
| 廠商： | ALPHA |
| 英文描述： | EZBuck TM 5A Simple Buck Regulator |
| 中文描述： | EZBuck商標(biāo)5A條簡單的降壓穩(wěn)壓器 |
| 文件頁數(shù)： | 11/21頁 |
| 文件大?。?/td> | 1147K |
| 代理商： | AOZ1014 |
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and high ripple current rating. Depending on the
application circuits, other low ESR tantalum capacitor
may also be used. When selecting ceramic capacitors,
X5R or X7R type dielectric ceramic capacitors are
preferred for their better temperature and voltage
characteristics. Note that the ripple current rating from
capacitor manufactures are based on certain amount of
life time. Further de-rating may be necessary for
practical design requirement.
Inductor
The inductor is used to supply constant current to
output when it is driven by a switching voltage. For
given input and output voltage, inductance and
switching frequency together decide the inductor ripple
current, which is,
V
I
×
The peak inductor current is:
February 2006
www.aosmd.com
Page 11 of 21
)
1
IN
O
O
L
V
V
L
f
×
=
2
L
O
Lpeak
I
I
I
+
=
High inductance gives low inductor ripple current but
requires larger size inductor to avoid saturation. Low
ripple current reduces inductor core losses. It also
reduces RMS current through inductor and switches,
which results in less conduction loss. Usually, peak to
peak ripple current on inductor is designed to be 20%
to 30% of output current.
When selecting the inductor, make sure it is able to
handle the peak current without saturation even at the
highest operating temperature.
The inductor takes the highest current in a buck circuit.
The conduction loss on inductor needs to be checked
for thermal and efficiency requirements.
Surface mount inductors in different shape and styles
are available from Coilcraft, Elytone and Murata.
Shielded inductors are small and radiate less EMI noise.
But they cost more than unshielded inductors. The
choice depends on EMI requirement, price and size.
Table below lists some inductors for typical output
voltage design.
Table 2.
Vout
L1
Shielded, 4.7uH
MSS1278-472MLD
Shielded, 4.7uH
MSS1260-472MLD
Un-shielded, 3.3uH
DO3316P-332MLD
Shielded, 3.3uH
DO1260-332NXD
Shield, 3.3uH
ET553-3R3
Shield, 2.2uH
ET553-2R2
Un-shielded, 2.2uH
DO3316P-222MLD
Shielded, 2.2uH
MSS1260-222NXD
Output Capacitor
The output capacitor is selected based on the DC
output voltage rating, output ripple voltage specification
and ripple current rating.
The selected output capacitor must have a higher rated
voltage specification than the maximum desired output
voltage including ripple. De-rating needs to be
considered for long term reliability.
Output ripple voltage specification is another important
factor for selecting the output capacitor. In a buck
converter circuit, output ripple voltage is determined by
inductor value, switching frequency, output capacitor
value and ESR. It can be calculated by the equation
below:
Manufacture
Coilcraft
5.0 V
Coilcraft
Coilcraft
Coilcraft
3.3 V
ELYTONE
ELYTONE
Coilcraft
1.8 V
Coilcraft
)
8
1
(
O
CO
L
O
C
f
ESR
I
V
×
×
+
×
=
where C
is output capacitor value and ESR
CO
is the
Equivalent Series Resistor of output capacitor.
When low ESR ceramic capacitor is used as output
capacitor, the impedance of the capacitor at the
switching frequency dominates. Output ripple is mainly
caused by capacitor value and inductor ripple current.
The output ripple voltage calculation can be simplified
to:
O
L
O
C
f
I
V
×
×
×
=
8
1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AOZ1014AI | EZBuck TM 5A Simple Buck Regulator |
| AOZ1014DI | EZBuck TM 5A Simple Buck Regulator |
| AOZ1015-EVA | EZBuck⑩ 1.5A Simple Buck Regulator Evaluation Board Note |
| AOZ1015 | EZBuck⑩ 1.5A Synchronous Buck Regulator |
| AOZ1015AI | EZBuck⑩ 1.5A Synchronous Buck Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AOZ1014AI | 功能描述:IC REG BUCK ADJ 5A 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:EZBuck™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應(yīng)商設(shè)備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
| AOZ1014AI_09 | 制造商:AOSMD 制造商全稱:Alpha & Omega Semiconductors 功能描述:EZBucka?￠ 5A Simple Buck Regulator |
| AOZ1014DI | 功能描述:IC REG BUCK ADJ 5A 8DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:EZBuck™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應(yīng)商設(shè)備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
| AOZ1014DI_09 | 制造商:AOSMD 制造商全稱:Alpha & Omega Semiconductors 功能描述:EZBucka?￠ 5A Simple Buck Regulator |
| AOZ1015 | 制造商:AOSMD 制造商全稱:Alpha & Omega Semiconductors 功能描述:EZBuck⑩ 1.5A Synchronous Buck Regulator |
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