- 您現(xiàn)在的位置：買(mǎi)賣IC網(wǎng) > PDF目錄375341 > AOZ1015 (ALPHA) EZBuck⑩ 1.5A Synchronous Buck Regulator PDF資料下載
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)： | 7/15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)當(dāng)前第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)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 7 of 15
Detailed Description
The AOZ1015 is a current-mode step down regulator with
integrated high side PMOS switch and a low side free-
wheeling Schottky diode. It operates from a 4.5V to 16V
input voltage range and supplies up to 1.5A of load
current. The duty cycle can be adjusted from 6% to 100%
allowing a wide range of output voltages. Features
include; enable control, Power-On Reset, input under
voltage lockout, fixed internal soft-start and thermal shut
down.
The AOZ1015 is available in an SO-8 package.
Enable and Soft Start
The AOZ1015 has an internal soft start feature to limit
in-rush current and ensure the output voltage ramps
up smoothly to regulation voltage. A soft start process
begins when the input voltage rises to 4.0V and voltage
on EN pin is HIGH. In the soft start process, the output
voltage is typically ramped to regulation voltage in 2.2ms.
The 2.2ms soft start time is set internally.
The EN pin of the AOZ1015 is active HIGH. Connect the
EN pin to V
IN
if the enable function is not used. Pulling
EN to ground will disable the AOZ1015. Do not leave it
open. The voltage on the EN pin must be above 2.0V to
enable the AOZ1015. When voltage on EN falls below
0.6V, the AOZ1015 is disabled. If an application circuit
requires the AOZ1015 to be disabled, an open drain or
open collector circuit should be used to interface to EN
pin.
Steady-State Operation
Under steady-state conditions, the converter operates
in fixed frequency and Continuous-Conduction Mode
(CCM).
The AOZ1015 integrates an internal P-MOSFET as the
high-side switch. Inductor current is sensed by amplifying
the voltage drop across the drain to source of the high
side power MOSFET. Output voltage is divided down by
the external voltage divider at the FB pin. The difference
of the FB pin voltage and reference is amplified by the
internal transconductance error amplifier. The error
voltage, which shows on the COMP pin, is compared
against the current signal, which is the sum of inductor
current signal and ramp compensation signal, at PWM
comparator input. If the current signal is less than the
error voltage, the internal high-side switch is on. The
inductor current flows from the input through the inductor
to the output. When the current signal exceeds the error
voltage, the high-side switch is off. The inductor current
is freewheeling through the internal Schottky diode to
output.
The AOZ1015 uses a P-Channel MOSFET as the high
side switch. It saves the bootstrap capacitor normally
seen in a circuit which is using an NMOS switch. It allows
100% turn-on of the upper switch to achieve linear regu-
lation mode of operation. The minimum voltage drop from
V
IN
to V
O
is the load current X DC resistance of MOSFET
+ DC resistance of the buck inductor. It can be calculated
by equation below:
where;
V
O_MAX
is the maximum output voltage,
V
IN
is the input voltage from 4.5V to 16V,
I
O
is the output current from 0A to 1.5A,
R
DS(ON)
is the on resistance of the internal MOSFET, the value
is between 97m
and 200m
depending on input voltage and
junction temperature, and
R
inductor
is the inductor DC resistance.
Switching Frequency
The AOZ1015 switching frequency is fixed and set by an
internal oscillator. The actual switching frequency could
range from 400kHz to 600kHz due to device variation.
Output Voltage Programming
Output voltage can be set by feeding back the output to
the FB pin with a resistor divider network. In the
application circuit shown in Figure 1. The resistor divider
network includes R
2
and R
3
. Usually, a design is started
by picking a fixed R
3
value and calculating the required
R
2
with equation below.
R
2
R
3
Some standard values of R
2
, R
3
for most commonly used
output voltage values are listed in Table 1.
Table 1.
V
O
(V)
R
2
(k
)
R
3
(k
)
0.8
1.0
Open
1.2
4.99
10
1.5
10
11.5
1.8
12.7
10.2
2.5
21.5
10
3.3
31.6
10
5.0
52.3
10
V
O_MAX
V
IN
I
O
R
DS ON
)
R
inductor
+
(
)
×
–
=
V
O
0.8
1
------
+
×
=
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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。