- 您现在的位置：买卖IC网 > PDF目录1777 > ADP3300ARTZ-2.7RL7 (Analog Devices Inc)IC REG LDO 2.7V 50MA SOT23-6 PDF资料下载
参数资料
| 型号： | ADP3300ARTZ-2.7RL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/9页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 2.7V 50MA SOT23-6 |
| 标准包装： | 1 |
| 系列： | anyCAP® |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 2.7V |
| 输入电压： | 3 V ~ 12 V |
| 电压 - 压降（标准）： | 0.08V @ 50mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 50mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-23-6 |
| 包装： | 标准包装 |
| 产品目录页面： | 794 (CN2011-ZH PDF) |
| 其它名称： | ADP3300ARTZ2.7RDKR |
ADP3300
Thermal Overload Protection
The ADP3300 is protected against damage due to excessive
power dissipation by its thermal overload protection circuit,
which limits the die temperature to a maximum of 165 ° C.
Under extreme conditions (i.e., high ambient temperature
and high power dissipation), where die temperature starts to rise
above 165 ° C, the output current is reduced until die tempera-
ture has dropped to a safe level. Output current is restored
when the die temperature is reduced.
Current and thermal limit protections are intended to protect
the device against accidental overload conditions. For normal
operation, device power dissipation should be externally
limited so that junction temperatures will not exceed 125 ° C.
Calculating Junction Temperature
Device power dissipation is calculated as follows:
PD = ( V IN – V OUT ) I LOAD + ( V IN ) I GND
Where I LOAD and I GND are load current and ground current,
V IN and V OUT are input and output voltages respectively.
Error Flag Dropout Detector
The ADP3300 will maintain its output voltage over a wide
range of load, input voltage and temperature conditions. If the
output is about to lose regulation, for example, by reducing the
supply voltage below the combined regulated output and dropout
voltages, the ERR pin will be activated. The ERR output is an
open collector that will be driven low.
Once set, the ERR or flag’s hysteresis will keep the output low
until a small margin of operating range is restored either by
raising the supply voltage or reducing the load.
APPLICATION CIRCUITS
Crossover Switch
The circuit in Figure 4 shows that two ADP3300s can be used
to form a mixed supply voltage system. The output switches
between two different levels selected by an external digital input.
Output voltages can be any combination of voltages from the
Ordering Guide.
Assuming I LOAD = 50 mA, I GND = 0.5 mA, V IN = 8 V and
V OUT = 3.3 V, device power dissipation is:
PD = (8 – 3.3) 0.05 + 8 × 0.5 mA = 0.239 W
V IN = 5.5V TO 12V
OUTPUT SELECT
5.0V
0V
IN
SD
OUT
ADP3300-5.0
GND
V OUT = 5V/3.3V
? T = T J – T A = PD × θ J A = 0.239 × 165 = 39.4 ° C
With a maximum junction temperature of 125 ° C, this yields a
maximum ambient temperature of 85 ° C.
+
C1
1.0 F
IN
OUT
ADP3300-3.3
+
C2
0.47 F
Printed Circuit Board Layout Consideration
Surface mount components rely on the conductive traces or
pads to transfer heat away from the device. Appropriate PC
SD
GND
board layout techniques should be used to remove heat from the
immediate vicinity of the package.
The following general guidelines will be helpful when designing
a board layout:
1. PC board traces with larger cross section areas will remove
Figure 4. Crossover Switch
Higher Output Current
If higher current is needed, an appropriate pass transistor can be
used, as in Figure 5, to increase the output current to 1 A.
more heat. For optimum results, use PC boards with thicker
copper and wider traces.
2. Increase the surface area exposed to open air so heat can be
removed by convection or forced air flow.
3. Do not use solder mask or silkscreen on the heat dissipating
V IN = 6V TO 8V
C1
47 F
+
R1
50
MJE253 *
IN
OUT
C2
V OUT = 5V @ 1A
traces because it will increase the junction to ambient thermal
resistance of the package.
ADP3300-5
10 F
Shutdown Mode
Applying a high signal to the shutdown pin or tying it to the
SD
GND
ERR
input pin will turn the output ON. Pulling the shutdown pin
down to 0.3 V or below, or tying it to ground, will turn the
output OFF. In shutdown mode, quiescent current is reduced
to less than 1 μ A.
REV. C
–7 –
* AAVID531002 HEAT SINK IS USED
Figure 5. High Output Current Linear Regulator
相关PDF资料 |
PDF描述 |
|---|---|
| ADP3301ARZ-3-REEL | IC REG LDO 3V .1A 8SOIC |
| ADP3303AR-3.2-REEL | IC REG LDO 3.2V .2A 8-SOIC |
| ADP3309ARTZ-3.3-R7 | IC REG LDO 3.3V .1A SOT-23-5 |
| ADP3330ARTZ-2.85R7 | IC REG LDO 2.85V .2A SOT23-6 |
| ADP3331ARTZ-REEL7 | IC REG LDO ADJ .2A SOT-23-6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP3300ARTZ-3 | 制造商:Analog Devices 功能描述: |
| ADP3300ARTZ-3.2-R7 | 制造商:Analog Devices 功能描述:LDO Regulator Pos 3.2V 0.05A 6-Pin SOT-23 T/R 制造商:Analog Devices 功能描述:LDO Regulator 3.2V 0.1A 6-Pin SOT-23 |
| ADP3300ARTZ-3.2-RL | 功能描述:IC REG LDO 3.2V 50MA SOT23-6 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:anyCAP® 标准包装:45 系列:- 稳压器拓扑结构:正，固定式 输出电压:5V 输入电压:6 V ~ 30 V 电压 - 压降（标准）:0.47V @ 250mA 稳压器数量:1 电流 - 输出:250mA 电流 - 限制（最小）:- 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:TO-220-3 供应商设备封装:TO-220-3 包装:管件 产品目录页面:1289 (CN2011-ZH PDF) 其它名称:*LP2954AIT*LP2954AIT/NOPBLP2954AIT |
| ADP3300ARTZ-3.3RL7 | 功能描述:IC REG LDO 3.3V 50MA SOT23-6 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:anyCAP® 标准包装:75 系列:- 稳压器拓扑结构:正，可调式 输出电压:1.2 V ~ 37 V 输入电压:4.2 V ~ 40 V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:500mA 电流 - 限制（最小）:500mA 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-252-3，DPak（2 引线+接片），SC-63 供应商设备封装:TO-252-3 包装:管件 产品目录页面:1286 (CN2011-ZH PDF) 其它名称:*LM317AMDT/NOPBLM317AMDT |
| ADP3300ARTZ-3.3RL7 | 制造商:Analog Devices 功能描述:Linear Voltage Regulator IC |
发布紧急采购，3分钟左右您将得到回复。