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参数资料
| 型号： | AS1364-BTDT-AD |
| 厂商： | AUSTRIAMICROSYSTEMS AG |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 1A LDO, Low Noise |
| 文件页数： | 10/19页 |
| 文件大小： | 787K |
| 代理商： | AS1364-BTDT-AD |
AS1364
Datasheet - Detailed Description
www.austriamicrosystems.com
Revision 1.8
10 - 19
8.1 Output Voltage Selection
At the factory trimmed versions of the AS1364 offering the bypass pin
(see Figure )
, the output voltage is then set to an internally trimmed voltage
(see Ordering Information on page 18)
.
For the adjustable AS1364-AD, an output voltage between +1.2V and +5V can be set by using two external resistors
(see Figure 17)
. In this
mode, V
OUT
is determined by:
(EQ 1)
Where:
V
SET/BYP
= 1.2V ±0.03V
A simplification of R
1
and R
2
selection is:
(EQ 2)
Since the input bias current at SET is less than 100nA, large resistance values can be used for R1 and R2 to minimize power consumption and
therefore increasing efficiency.
Note:
Up to 125k
is acceptable for R2. If the SET pin is connected to GND without a resistor, 3.3V will be set as output voltage.
In preset voltage mode, the impedance from SET to GND should be less than 10k
or spurious conditions may cause the voltage at SET to
exceed the 50mV threshold.
Figure 17. Adjustable Output Voltage Typical Application
8.2 Shutdown
If pin EN is connected to GND the AS1364 is disabled. In shutdown mode all internal circuits are turned off, reducing supply current to 10nA
(typ). For normal device operation pin EN must be connected to IN. During shutdown, POK goes low.
When in shutdown, a 5k
(typ) discharge path is connected between the output pin and ground.
8.3 Power-OK
The AS1364 features a power-ok indicator that asserts when the output voltage falls out of regulation. The open-drain POK output goes low
when output voltage at OUT falls 6% below its nominal value. A 100k
pull-up resistor from POK to a (typically OUT) provides a logic control
signal.
POK can be used as a power-on-reset (POR) signal to a microcontroller or can drive an external LED to indicate a power failure condition.
Note:
POK is low during shutdown.
V
OUT
V
SETBYP
1
R
1
R
2
-----
+
=
R
1
R
2
V
V
SETBYP
---------------------
1
–
=
AS1364
C
OUT
4.7μF
3
IN
5
OUT
2
EN
7
SET/BYP
C
IN
4.7μF
Reset Output
On
Off
4
IN
1
POK
6
OUT
V
OUT
V
IN
R
1
R
2
8
GND
相关PDF资料 |
PDF描述 |
|---|---|
| AS1367-BTDT-12 | Adaptive LDO |
| AS1367-BTDT-18 | Adaptive LDO |
| AS1367-BTDT-30 | Adaptive LDO |
| AS1367-BTDT-33 | Adaptive LDO |
| AS1367-BTDT-45 | Adaptive LDO |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1364-BTDT-AD EB | 制造商:ams 功能描述:Evaluation Board |
| AS1364-BTDT-AD-1k | 功能描述:低压差控制器 - LDO 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 |
| AS1364-TD-18_EK_ST | 功能描述:AS1364 1 - Single Channels per IC Positive Fixed Linear Voltage Regulator Evaluation Board 制造商:ams 系列:- 零件状态:有效 每 IC 通道数:1 - 单 电压 - 输出:1.8V 电流 - 输出:1A 电压 - 输入:2 V ~ 5.5 V 稳压器类型:正，固定式 工作温度:-40°C ~ 85°C 板类型:完全填充 所含物品:板 使用的 IC/零件:AS1364 标准包装:1 |
| AS1364-TD-45_EK_ST | 功能描述:AS1364 1 - Single Channels per IC Positive Fixed Linear Voltage Regulator Evaluation Board 制造商:ams 系列:- 零件状态:有效 每 IC 通道数:1 - 单 电压 - 输出:4.5V 电流 - 输出:1A 电压 - 输入:2 V ~ 5.5 V 稳压器类型:正，固定式 工作温度:-40°C ~ 85°C 板类型:完全填充 所含物品:板 使用的 IC/零件:AS1364 标准包装:1 |
| AS1364-TD-AD_EK_ST | 功能描述:AS1364 1 - Single Channels per IC Positive Adjustable Linear Voltage Regulator Evaluation Board 制造商:ams 系列:- 零件状态:有效 每 IC 通道数:1 - 单 电压 - 输出:3.3V 电流 - 输出:1A 电压 - 输入:2 V ~ 5.5 V 稳压器类型:正，可调式 工作温度:-40°C ~ 85°C 板类型:完全填充 所含物品:板 使用的 IC/零件:AS1364 标准包装:1 |
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