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参数资料
| 型号： | AOZ5007QI |
| 厂商： | Alpha & Omega Semiconductor Inc |
| 文件页数： | 10/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 50A 40QFN |
| 标准包装： | 3,000 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 4.5 V ~ 25 V |
| 输入电压： | 4.5 V ~ 25 V |
| 频率 - 开关： | 200kHz ~ 1.5MHz |
| 电流 - 输出： | 50A |
| 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： | 40-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 40-QFN（6x6） |
AOZ5007
+5V
VDRV
AOZ5007
VIN
BOOT
VIN
VCIN
Rboot
PWM
SMOD
DISB
THDN
Drive Logic
and
Dead Time
Control
VSWH
Cboot
CGND
CGND
PGND
PGND
Figure 17. Applying VDRV and Generating BOOT Supply
IMPORTANT: If the DISB is used it is necessary to
ensure proper coordination with soft start and enable
features of the external PWM controller in the system.
Every time AOZ5007QI is disabled through DISB there
will be no output and the external controller may enter
into open loop and put out a PWM signal with maximum
duty ratio possible. If the AOZ5007QI is re-enabled by
taking DISB high, there will be extremely large inrush
currents while the output voltage builds up again which
may drive the system into current limit. There might be
undesirable consequences such as inductor saturation,
overloading of the input or even a catastrophic failure of
the device. It is recommended that the PWM controller
be disabled when AOZ5007QI is disabled or non
operational because of UVLO. The PWM controller
should always be enabled with a soft start to minimise
stresses on the converter.
In general it should be noted that AOZ5007QI is a
combination of two MOSFETs with an unintelligent driver,
all of which are optimized for switching at the highest
efficiency. Other than UVLO and thermal protection, it
does not have any monitoring or protection functions built
in. The PWM controller should be designed in to perform
these functions under all possible operating and transient
conditions.
Input Voltage VIN
AOZ5007QI is rated to operate over a wide input range of
4.5 V to 25 V. As with any other synchronous buck
converter, large pulse currents at high frequency and
extremely high di/dt rates will be drawn by the module
during normal operation. It is strongly recommended to
bypass the input supply very close to package leads with
X7R or X5R quality ceramic capacitors.
The high side MOSFET in AOZ5007QI is optimized for
fast switching with low duty ratios. It has ultra low gate
charges which have been achieved as a trade off with
higher R DS(ON) value. When the module is operated at
low VIN the duty ratio will be higher and conduction
losses in the HS FET will also be correspondingly higher.
This will be compensated to some extent by reduced
switching losses. The total power loss in the module may
appear to be low even though in reality the HS MOSFET
losses may be disproportionately high. Since the two
MOSFETs have their own exposed pads and PCB
copper areas for heat dissipation, the HS FET may be
much hotter than the LS FET. It is recommended that
worst case junction temperature be measured and
ensured to be within safe limits when the module is
operated with high duty ratios.
PWM Input
AOZ5007QI is offered in two versions which can be
interfaced with PWM logic compatible with either 5 V
(TTL) or 3V (CMOS). Refer to Figure 16 for the timing
and propagation delays between the PWM input and the
gate drives. The PWM is also a tri state compatible input.
When the input is high impedance or unconnected both
the gate drives will be off and the gates are held active
low. The PWM Threshold Table (Table 1) lists the
thresholds for high and low level transitions as well as tri
state operation. As shown in Figure 16, there is a hold off
delay between the time PWM signal enters the tri state
window and the corresponding gate drive is pulled low.
Rev. 1.1 October 2011
www.aosmd.com
Page 10 of 16
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| AOZ5007QI-01 | 功能描述:IC REG BUCK SYNC ADJ 50A 40QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:两者兼有 输出数:1 输出电压:5V，1 V ~ 10 V 输入电压:3.5 V ~ 28 V PWM 型:电流模式 频率 - 开关:220kHz ~ 1MHz 电流 - 输出:600mA 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SSOP（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:16-QSOP |
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| AOZ5029QI-5 | 功能描述:MOD SYNC BUCK POWER STAGE 24QFN 制造商:alpha & omega semiconductor inc. 系列:- 零件状态:停產 功能:降压 输出配置:正 拓扑:降压 输出数:1 电压 - 输入（最小值）:4.5V 同步整流器:是 工作温度:-40°C ~ 85°C（TA） 标准包装:3,000 |
| AOZ5038QI | 功能描述:MOD SYNC BUCK POWER STAGE 40A 25 制造商:alpha & omega semiconductor inc. 系列:- 零件状态:在售 类型:MOSFET 配置:单相 电流:50A 电压 - 隔离:- 封装/外壳:31-PowerWFQFN 模块 标准包装:3,000 |
| AOZ5039QI | 功能描述:MOD SYNC BUCK POWER STAGE 35A 25 制造商:alpha & omega semiconductor inc. 系列:- 零件状态:在售 类型:MOSFET 配置:单相 电流:50A 电压 - 隔离:- 封装/外壳:31-PowerWFQFN 模块 标准包装:3,000 |
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