参数资料
| 型号： | AP7173-FNG-7 |
| 厂商： | Diodes Inc |
| 文件页数： | 11/15页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO ADJ 1.5A 10DFN |
| 标准包装： | 1 |
| 稳压器拓扑结构： | 正，可调式 |
| 输出电压： | 0.8 V ~ 3.3 V |
| 输入电压： | 1 V ~ 5.5 V |
| 电压 - 压降（标准）： | 0.165V @ 1.5A |
| 稳压器数量： | 1 |
| 电流 - 输出： | 1.5A（最小值） |
| 电流 - 限制（最小）： | 2A |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-UFDFN 裸露焊盘 |
| 供应商设备封装： | DFN3030-10 |
| 包装： | 标准包装 |
| 其它名称： | AP7173-FNG-7DIDKR |
AP7173
1.5A LOW DROPOUT LINEAR REGULATOR WITH
PROGRAMMABLE SOFT-START
Application Notes (Continued)
PROGRAMMABLE SOFT-START (cont.)
The relationship between the soft-start time and the soft-
start charging current (I SS ), soft-start capacitance (C SS ),
and the internal reference voltage (V REF ) is
t SS = (V REF x C SS ) / I SS
Refer to Table 2 for suggested soft-start capacitor values
ENABLE/SHUTDOWN
The EN pin can be used with standard digital signals or
relatively slow-ramping analog signals. Pulling the V EN
below 0.4V turns the regulator off, while driving the V EN
above 1.1V turns the regulator on. Figure 30 shows an
example where an RC circuit is used to delay start the
AP7173.
If not used, the EN pin can be connected to the VCC or IN
pin when the V IN is greater than 1.1V, as long as good
decoupling measures are taken for the EN pin.
Figure 30. Delayed Start Using an RC
over-current protection circuitry to protect the device
against overload conditions. It limits the device current to
a typical value of 3A and reduces the V OUT when the load
tries to pull more current.
For more effective protection against short-circuit failure,
the AP7173 also includes a short-circuit foldback
mechanism that lowers the current limit to a typical value
of 1.0A when the V FB drops to below 0.2V.
THERMAL PROTECTION
Thermal shutdown limits the AP7173 junction
temperature and protects the device from damage as a
result of overheating.
Thermal protection turns off the V OUT when the AP7173’s
junction temperature rises to approximately +150 ° C,
allowing it to cool down. When the junction temperature
drops to approximately +130 ° C, the output is re-enabled.
Therefore, the thermal protection circuit may cycle on
and off at a rate dependent on the power dissipation,
thermal resistance, and ambient temperature.
POWER DISSIPATION
Thermal shutdown is intented to protect the AP7173
against abnormal overheating. For normal operation,
excessive power dissipation should be avoided and good
heatsinking should be provided. Power dissipation in the
device is the product of the device dropout voltage and
the load current,
P D = (V IN - V OUT ) x I OUT
Circuit to Enable AP7173
As can be seen, power dissipation can be minimized by
POWER-GOOD
The power-good (PG) pin is an open-drain output and can
be pulled up through a resistor of 10k Ω to1M Ω to V IN , V OUT
or any other rail that is 5.5V or lower. When the V OUT ≥
V PG,TH +V PG,HYS , the PG output is high-impedance; if the
V OUT drops to below V PG,TH , V VCC ≤ 1.9V or the device is
disabled, the PG pin is pulled to low by an internal
MOSFET.
OVER-CURRENT AND SHORT-CIRCUIT
PROTECTION
The AP7173 features a factory-trimmed, temperature and
supply voltage compensated internal current limit and an
using the lowest input voltage necessary to achieve the
required output voltage regulation.
To ensure that the device junction temperature does not
exceed the specified limit of 125 ° C, an application should
provide heat conduction paths that have junction-to-
ambient thermal resistance lower than the calculated
value here:
R θ JA = (125°C –T A ) / P D
For the DFN package with exposed pad, the primary
conduction path for heat is through the exposed pad to
the printed circuit board (PCB). The pad should be
attached to an appropriate amount of copper PCB area to
ensure that the device does not overheat.
AP7173
Document number: DS31369 Rev. 9 - 2
1 of 15
April 2011
? Diodes Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| AP7215-33YG-13 | IC REG LDO 3.3V .6A SOT89-3 |
| AP7217-33SG-13 | IC REG LDO 3.3V .5A 8-SOIC |
| AP7217A-33SG-13 | IC REG LDO 3.3V .6A 8-SOIC |
| AP7217C-13SPG-13 | IC REG LDO 1.25V .6A 8-SOIC |
| AP7217D-12YG-13 | IC REG LDO 1.2V .6A SOT89-3 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AP7173-SPG-13 | 功能描述:开关变换器、稳压器与控制器 1.5V LDO RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| AP7173-SPG-13-82 | 制造商:Diodes Zetex 功能描述:AP7173-SPG-13-82 |
| AP7173-SPG-7 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:1.5A LOW DROPOUT LINEAR REGULATOR WITH PROGRAMMABLE SOFT-START |
| AP7175 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:The AP7175 is a 3.0A ultra low-dropout (LDO) linear regulator that features an enable input and a power-good output. |
| AP7175MP-13 | 功能描述:低压差控制器 - LDO 3A Ultra LDO Enable 1.2 to 3.65V Low ESR RoHS:否 制造商:Micrel 最大输入电压:5.5 V 输出电压:Adjustable 输出电流:10 mA 负载调节: 输出类型:Adjustable, Fixed 输出端数量:1 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-23-6 |
发布紧急采购，3分钟左右您将得到回复。