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參數(shù)資料
| 型號(hào)： | AOZ1015 |
| 廠商： | ALPHA |
| 英文描述： | EZBuck⑩ 1.5A Synchronous Buck Regulator |
| 中文描述： | EZBuck⑩1.5A的同步降壓穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 11/15頁(yè) |
| 文件大?。?/td> | 715K |
| 代理商： | AOZ1015 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)當(dāng)前第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)
AOZ1015
Rev. 1.2 September 2007
www.aosmd.com
Page 11 of 15
The previous equation above can also be simplified to:
×
----------------------
=
An easy-to-use application software which helps to
design and simulate the compensation loop can be found
at
www.aosmd.com
.
Thermal Management and Layout
Consideration
In the AOZ1015 buck regulator circuit, high pulsing
current flows through two circuit loops. The first loop
starts from the input capacitors, to the V
IN
pin, to the
LX pins, to the filter inductor, to the output capacitor
and load, and then returns to the input capacitor through
ground. Current flows in the first loop when the high side
switch is on. The second loop starts from inductor, to the
output capacitors and load, to the PGND pin of the
AOZ1015, to the LX pins of the AOZ1015. Current flows
in the second loop when the low side diode is on.
In PCB layout, minimizing the two loops area reduces the
noise of this circuit and improves efficiency. A ground
plane is recommended to connect input capacitor, output
capacitor, and PGND pin of the AOZ1015.
In the AOZ1015 buck regulator circuit, the two major
power dissipating components are the AOZ1015 and
the output inductor. The total power dissipation of
converter circuit can be measured by input power minus
output power.
The power dissipation of the inductor can be approxi-
mately calculated by output current and DCR of inductor.
The actual AOZ1015 junction temperature can be
calculated with power dissipation in the AOZ1015 and
thermal impedance from junction to ambient.
The maximum junction temperature of the AOZ1015 is
150°C, which limits the maximum load current capability.
Please see the thermal de-rating curves for the maximum
load current of the AOZ1015 under different ambient
temperatures.
The thermal performance of the AOZ1015 is strongly
affected by the PCB layout. Extra care should be taken
by users during the design process to ensure that the IC
will operate under the recommended environmental
conditions.
Several layout tips are listed below for the best electronic
and thermal performance. Figure 3 illustrates a single
layer PCB layout example as reference.
1.
Do not use thermal relief connection to the V
IN
and
the PGND pins. Pour a maximized copper area to the
PGND pin and the V
IN
pin to help thermal dissipation.
The input capacitors should be connected as close
as possible to the V
IN
and PGND pins.
A ground plane is preferred. If a ground plane is not
used, separate PGND from AGND and connect
them only at one point to avoid the PGND pin noise
coupling to the AGND pin. In this case, a decoupling
capacitor should be connected between V
IN
and
AGND.
2.
3.
4.
Make the current trace from LX pins to L to C
O
to the
PGND as short as possible.
5.
Pour copper plane on all unused board area and
connect it to stable DC nodes, like V
IN
, GND or V
OUT
.
The two LX pins are connected to the internal PFET
drain. They are low resistance thermal conduction
path and a noisy switching node. Connecting a
copper plane to the LX pin to help thermal dissipa-
tion. This copper plane should not be too large
otherwise switching noise may be coupled to other
parts of the circuit.
6.
7.
Keep sensitive signal traces such as trace
connecting FB and COMP away from the LX pins.
C
C
C
R
L
R
C
P
total_loss
V
IN
I
IN
V
O
I
O
×
–
×
=
P
inductor_loss
I
O
2
R
inductor
1.1
×
×
=
T
junction
P
total_loss
P
inductor_loss
–
T
ambient
+
(
)
Θ
×
=
+
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AOZ1015AI | EZBuck⑩ 1.5A Synchronous Buck Regulator |
| AOZ1016 | EZBuck⑩ 2A Simple Buck Regulator |
| AOZ1016AI | EZBuck⑩ 2A Simple Buck Regulator |
| AOZ1017-EVA | EZBuck⑩ 3A Simple Buck Regulator Evaluation Board Note |
| AOZ1017 | EZBuck⑩ 3A Simple Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AOZ1015AI | 功能描述:IC REG BUCK ADJ 1.5A 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)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:50 系列:- 類型:升壓（升壓） 輸出類型:兩者兼有 輸出數(shù):1 輸出電壓:5V，2 V ~ 16.5 V 輸入電壓:2 V ~ 16.5 V PWM 型:- 頻率 - 開(kāi)關(guān):45kHz 電流 - 輸出:50mA 同步整流器:無(wú) 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 供應(yīng)商設(shè)備封裝:8-PDIP |
| AOZ1015-EVA | 制造商:AOSMD 制造商全稱:Alpha & Omega Semiconductors 功能描述:EZBuck⑩ 1.5A Simple Buck Regulator Evaluation Board Note |
| AOZ1016 | 制造商:AOSMD 制造商全稱:Alpha & Omega Semiconductors 功能描述:EZBuck⑩ 2A Simple Buck Regulator |
| AOZ1016AI | 功能描述:IC REG BUCK ADJ 2A 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)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:2,500 系列:- 類型:降壓（降壓） 輸出類型:兩者兼有 輸出數(shù):1 輸出電壓:5V，1 V ~ 10 V 輸入電壓:3.5 V ~ 28 V PWM 型:電流模式 頻率 - 開(kāi)關(guān):220kHz ~ 1MHz 電流 - 輸出:600mA 同步整流器:無(wú) 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-SSOP（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:16-QSOP |
| AOZ1016AIL | 功能描述:IC REG BUCK ADJ 2A 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開(kāi)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:2,500 系列:- 類型:降壓（降壓） 輸出類型:兩者兼有 輸出數(shù):1 輸出電壓:5V，1 V ~ 10 V 輸入電壓:3.5 V ~ 28 V PWM 型:電流模式 頻率 - 開(kāi)關(guān):220kHz ~ 1MHz 電流 - 輸出:600mA 同步整流器:無(wú) 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:16-SSOP（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:16-QSOP |
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