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参数资料
| 型号： | AS1358-BTTT-27 |
| 厂商： | AUSTRIAMICROSYSTEMS AG |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 150mA 9μVrms, 92dB - LDO; Package Type: TSOT23-5; Output Range: 2.7V |
| 封装： | TSOT23-5 |
| 文件页数： | 8/16页 |
| 文件大小： | 900K |
| 代理商： | AS1358-BTTT-27 |
www.austriamicrosystems.com
Revision 1.5
8 - 16
AS1358 / AS1359
Datasheet - Detailed Description
8 Detailed Description
The AS1358 / AS1359 are ultra-low-noise, low-dropout, low-quiescent current linear-regulators specifically designed for space-limited
applications. The devices are available with preset output voltages from 1.5V to 4.5V in 50mV increments.
These devices can supply loads up to 150mA / 300mA. As shown in
Figure 18
, the AS1358 / AS1359 consist of an integrated bandgap core and
noise bypass circuitry, error amplifier, P-channel MOSFET pass transistor, and internal feedback voltage-divider.
Figure 18
shows the block diagram of the AS1358 / AS1359. It identifies the basics of a series linear regulator employing a 0.5
(typ) P-Channel
MOSFET as the control element. A stable voltage reference (REF in
Figure 18
) is compared with an attenuated sample of the output voltage.
Any difference between the two voltages (reference and sample) creates an output from the error amplifier that drives the series control element
to reduce the difference to a minimum. The error amplifier incorporates additional buffering to drive the relatively large gate capacitance of the
series pass P-channel MOSFET, when additional drive current is required under transient conditions. Input supply variations are absorbed by the
series element and output voltage variations with loading are absorbed by the low output impedance of the regulator.
The AS1358 / AS1359 deliver preset output voltages from 1.5V to 4.5V, in 50mV increments
(see Ordering Information on page 15)
.
The output voltage is fed back through an internal resistor voltage-divider connected to pin OUT. An external bypass capacitor connected to pin
BYPASS reduces noise at the output. Startup time is minimized by internal power-on circuitry which pre-charges C
BYPASS
. Additional blocks
include a current limiter, thermal sensor, and shutdown logic.
Figure 18. AS1358 / AS1359 Block Diagram
OUT
IN
SHDNN
BYPASS
GND
AS1358 /
AS1359
Thermal
Sensor
1.25 Reference and
Noise Bypass
Error
Amp
MOS
Driver w/
I
LIMIT
Shutdown and
Power-Down
Control
相关PDF资料 |
PDF描述 |
|---|---|
| AS1358-BTTT-28 | 150mA 9μVrms, 92dB - LDO; Package Type: TSOT23-5; Output Range: 2.8V |
| AS1358-BTTT-285 | 150mA 9μVrms, 92dB - LDO; Package Type: TSOT23-5; Output Range: 2.85V |
| AS1358-BTTT-30 | 150mA 9μVrms, 92dB - LDO; Package Type: TSOT23-5; Output Range: 3.0V |
| AS1358-BTTT-33 | 150mA 9μVrms, 92dB - LDO; Package Type: TSOT23-5; Output Range: 3.3V |
| AS1358-BTTT-45 | 150mA 9μVrms, 92dB - LDO; Package Type: TSOT23-5; Output Range: 4.5V |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1358-BTTT-28 | 功能描述:IC REG LDO 2.8V .15A TSOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.3V 输入电压:4.7 V ~ 15 V 电压 - 压降（标准）:1.2V @ 800mA 稳压器数量:1 电流 - 输出:800mA（最小值） 电流 - 限制（最小）:800mA 工作温度:0°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:PowerFlex/TO-252 包装:剪切带 (CT) 其它名称:296-31967-1 |
| AS1358-BTTT-285 | 功能描述:IC REG LDO 2.85V .15A TSOT23-5 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) |
| AS1358-BTTT-30 | 功能描述:IC REG LDO 3V .15A TSOT23-5 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) |
| AS1358-BTTT-33 | 功能描述:IC REG LDO 3.3V .15A TSOT23-5 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) |
| AS1358-BTTT-45 | 功能描述:IC REG LDO 4.5V .15A TSOT23-5 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 系列:- 标准包装:1 系列:- 稳压器拓扑结构:正，固定式 输出电压:3.3V 输入电压:4.7 V ~ 15 V 电压 - 压降（标准）:1.2V @ 800mA 稳压器数量:1 电流 - 输出:800mA（最小值） 电流 - 限制（最小）:800mA 工作温度:0°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:PowerFlex/TO-252 包装:剪切带 (CT) 其它名称:296-31967-1 |
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