- 您现在的位置：买卖IC网 > PDF目录381304 > AS1356-33-T (AUSTRIAMICROSYSTEMS AG) 150mA LDO, rev. Batt. Byp. POK; Package Type: SOT23-5; Output Range: 3.3V PDF资料下载
参数资料
| 型号： | AS1356-33-T |
| 厂商： | AUSTRIAMICROSYSTEMS AG |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 150mA LDO, rev. Batt. Byp. POK; Package Type: SOT23-5; Output Range: 3.3V |
| 封装： | SOT23-5 |
| 文件页数： | 9/13页 |
| 文件大小： | 293K |
| 代理商： | AS1356-33-T |
www.austriamicrosystems.com
Revision 1.03
9 - 13
AS1353/AS1356
Data Sheet
- Detailed Description
The power-OK feature is not active during shutdown and provides a power-on-reset (POR) function that can operate
down to V
IN
= 1V. A capacitor to GND may be added to generate a POR delay.
To obtain a logic-level output, connect a pull-up resistor from pin POK to pin OUT. Larger values for this resistor will
help minimize current consumption; a 100k
Ω
resistor is perfect for most applications (see Figure 13).
Reverse-Battery Protection
The AS1353/AS1356 contain integrated reverse-battery protection circuitry which monitors the polarity of pins IN and
SHDNM and disconnects the internal circuitry and parasitic diodes if the battery is connected incorrectly. Reverse sup-
ply current is limited to 1mA if V
IN
= V
SHDNM
falls below ground. Load current is also limited when V
IN
or V
SHDNM
are
reverse biased with respect to ground.
Current Limiting
The AS1353/AS1356 include current limiting circuitry to protect against short-circuit conditions. The circuitry monitors
and controls the gate voltage of the P-channel MOSFET, limiting the output current to 380mA (typ). The P-channel
MOSFET output can be shorted to ground for an indefinite period of time without damaging the device.
Noise Reduction
The AS1353 uses an external 0.01μF bypass capacitor (C
BP
) at pin BP to reduce output noise. An internal pre-charge
circuit is used to reduce start-up time.
The use of C
BP
> 0.01μF improves noise performances but increases start-up time.
Thermal-Overload Protection
The devices are protected against thermal runaway conditions by the integrated thermal sensor circuitry. Thermal
shutdown is an effective means to prevent die overheating since the power transistor is the principle heat source in the
device.
If the junction temperature exceeds 165oC (typ, AS1356) or 150oC (typ, AS1353), the thermal sensor starts the shut-
down logic, at which point the P-channel MOSFET is switched off. After the device temperature has dropped by
approximately 20oC, the thermal sensor will turn the P-channel MOSFET on again. Note that this will be exhibited as a
pulsed output under continuous thermal-overload conditions.
Note:
The absolute maximum junction-temperature rating of +150oC should not be exceeding during continual oper-
ation.
Operating Region and Power Dissipation
Maximum power dissipation is determined by the thermal resistance of the case and circuit board, the temperature dif-
ference between the die junction and ambient air, and the rate of air flow. The power dissipation of the device is calcu-
lated by:
P = I
OUT
(V
IN
- V
OUT
)
(EQ 1)
Maximum power dissipation is calculated by:
P
MAX
= (T
J
- T
AMB
) / (
Θ
JB
+
Θ
JA
)
(EQ 2)
Where:
T
J
-
T
AMB
is the temperature difference between the device die junction and the surrounding air.
Θ
JB
or
Θ
JC
is the thermal resistance of the package.
Θ
JA
is the thermal resistance through the printed circuit board, copper traces, and other materials to the surrounding
air.
Note:
Pin GND is a multi-function pin providing a connection to the system ground and acting as a heat sink. This pin
should be connected to the system ground using a large pad or ground plane.
相关PDF资料 |
PDF描述 |
|---|---|
| AS1355-BQFT-WGD | Triple LDO; Package Type: QFN(3x3)-16 |
| AS1357-F0F-T | Triple LDO with OTP; Package Type: QFN(4x4)-12; Output Range: 1,8V; Output Range: 2 x 3,3V |
| AS1357-T | Triple LDO with OTP; Package Type: QFN(4x4)-12; Output Range: 3 x 3,3V |
| AS1358-BTTT-15 | 150mA 9μVrms, 92dB - LDO; Package Type: TSOT23-5; Output Range: 1.5V |
| AS1358-BTTT-18 | 150mA 9μVrms, 92dB - LDO; Package Type: TSOT23-5; Output Range: 1.8V |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1357 | 功能描述:IC REG LDO ADJ .2A 12-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:3,000 系列:- 稳压器拓扑结构:正，固定式 输出电压:2.5V 输入电压:2.5 V ~ 5.5 V 电压 - 压降（标准）:- 稳压器数量:1 电流 - 输出:300mA（最小值） 电流 - 限制（最小）:360mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 供应商设备封装:TSOT-23-5 包装:带卷 (TR) |
| AS1357_1 | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:Programmable Triple LDO |
| AS13570FLF | 制造商:TT Electronics / IRC 功能描述:AS13570FLF |
| AS13570HLF | 制造商:TT Electronics / IRC 功能描述:AS13570HLF |
| AS13570JLF | 制造商:TT Electronics / IRC 功能描述:AS13570JLF |
发布紧急采购，3分钟左右您将得到回复。