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| 型号： | ADP3335ARMZ-5-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/16页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 5V .5A 8MSOP |
| 标准包装： | 1 |
| 系列： | anyCAP® |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 5V |
| 输入电压： | 最高 12V |
| 电压 - 压降（标准）： | 0.2V @ 500mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 标准包装 |
| 其它名称： | ADP3335ARMZ-5-REELDKR |
ADP3335
APPLICATIONS INFORMATION
OUTPUT CAPACITOR SELECTION
As with any micropower device, output transient response is a
function of the output capacitance. The ADP3335 is stable over
a wide range of capacitor values, types, and ESR (anyCAP). A
capacitor as low as 1 μF is all that is needed for stability; larger
capacitors can be used if high output current surges are anticipated.
The ADP3335 is stable with extremely low ESR capacitors (ESR
≈ 0), such as multilayer ceramic capacitors (MLCC) or organic
semiconductor electrolytic capacitors (OSCON). Note that the
effective capacitance of some capacitor types may fall below the
minimum at extreme temperatures. Ensure that the capacitor
provides more than 1 μF over the entire temperature range.
INPUT BYPASS CAPACITOR
An input bypass capacitor is not strictly required, but is advisable
in any application involving long input wires or high source
impedance. Connecting a 1 μF capacitor from IN to ground
reduces the circuit’s sensitivity to PC board layout. If a larger
value output capacitor is used, then a larger value input capacitor
is also recommended.
NOISE REDUCTION
A noise reduction capacitor (C NR ) can be used, as shown in
Low leakage capacitors in the 100 pF to 1 nF range provide the best
performance. Since the noise reduction pin, NR, is internally
connected to a high impedance node, any connection to this node
should be made carefully to avoid noise pickup from external
sources. The pad connected to this pin should be as small as
possible, and long PC board traces are not recommended.
When adding a noise reduction capacitor, maintain a minimum
load current of 1 mA when not in shutdown.
It is important to note that as C NR increases, the turn-on time
will be delayed. With NR values greater than 1 nF, this delay
may be on the order of several milliseconds.
C NR
5
Data Sheet
THERMAL OVERLOAD PROTECTION
The ADP3335 is protected against damage from 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
power dissipation) where die temperature starts to rise above
165°C, the output current is reduced until the die temperature
has dropped to a safe level. The 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 150°C.
CALCULATING JUNCTION TEMPERATURE
Device power dissipation is calculated as follows:
P D = ( V IN ? V OUT ) I LOAD + ( V IN ) I GND
Where I LOAD and I GND are load current and ground current, and
V IN and V OUT are input and output voltages, respectively.
Assuming I LOAD = 400 mA, I GND = 4 mA, V IN = 5.0 V, and V OUT =
3.3 V, device power dissipation is
P D = (5 V – 3.3 V)400 mA + 5.0 V(4 mA) = 700 mW
The junction temperature can be calculated from the power
dissipation, ambient temperature, and package thermal resistance.
The thermal resistance is a function not only of the package, but
also of the circuit board layout. Standard test conditions are used to
determine the values published in this data sheet, but actual
performance will vary. For an LFCSP-8 package mounted on a
standard 4-layer board, θ JA is 48°C/W. In the above example, where
the power dissipation is 700 mW, the temperature rise above
ambient will be approximately equal to
? T JA = 0.700 W × 48°C/W = 33.6°C
To limit the maximum junction temperature to 150°C, the
maximum allowable ambient temperature will be
T AMAX = 150°C ? 33.6°C = 116.4°C
7
NR OUT 3
ADP3335
IN OUT 2
In this case, the resulting ambient temperature limitation is
above the maximum allowable ambient temperature of 85°C.
V IN
C IN
1 μ F
+
8
IN
SD
6
OUT 1
GND
4
+
V OUT
C OUT
1 μ F
ON
OFF
Figure 24. Typical Application Circuit
Rev. D | Page 10 of 16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP3336 | 制造商:AD 制造商全称:Analog Devices 功能描述:High Accuracy Ultralow IQ, 500 mA anyCAP Adjustable Low Dropout Regulator |
| ADP3336ARM-REEL | 制造商:Analog Devices 功能描述:LDO Regulator Pos 1.5V to 10V 0.8A 8-Pin MSOP T/R |
| ADP3336ARM-REEL7 | 功能描述:IC REG LDO ADJ .5A 8-MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:anyCAP® 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式和可调式 输出电压:3.3V，1.25 V ~ 5.7 V 输入电压:4.5 V ~ 7 V 电压 - 压降（标准）:1.1V @ 1A 稳压器数量:2 电流 - 输出:1A 电流 - 限制（最小）:1A 工作温度:0°C ~ 125°C 安装类型:表面贴装 封装/外壳:TO-252-5，DPak（4 引线 + 接片），TO-252AD 供应商设备封装:PPAK 包装:管件 其它名称:497-3576-5 |
| ADP3336ARMZ | 制造商:Analog Devices 功能描述:LDO 2.6-12V 0.5A 1.5-10V 8 制造商:Analog Devices 功能描述:LDO, 2.6-12V, 0.5A, 1.5-10V, 8MSOP; Primary Input Voltage:12V; Dropout Voltage Vdo:200mV; Voltage Regulator Case Style:MSOP; No. of Pins:8; Output Current:500mA; Operating Temperature Min:-40C; Operating Temperature Max:85C; MSL:-;;RoHS Compliant: Yes |
| ADP3336ARMZ-REEL | 制造商:Analog Devices 功能描述:LDO Regulator Pos 1.5V to 10V 0.8A 8-Pin MSOP T/R 制造商:Analog Devices 功能描述:LDO ADJ 0.5A SMD MSOP8 3336 |
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