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| STLQ02 200A超低静态电流LDO解决方案 |
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| 文章来源：永阜康科技 更新时间：2018/7/26 11:54:00 |
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ST公司的STLQ02是200A超低静态电流低压降(LDO)稳压器,输入电压2V-5.5V,输出电压0.8 V - 4.5 V,可调每步为50mV,最大负载的压降是160mV,无负载时的静态电流为0.3uA,工作温度-40℃ 到+125℃,主要用在智能手机/平板电脑,图像传感器,可穿戴附件,健康设备,和仪表.本文介绍了STLQ02主要特性,固定频率和可调频率框图,应用电路,以及基于LDBL20, LDLN025, LD39130S和STLQ020的四路高性能LDO评估板STEVAL-LDO001V1主要特性,电路图和材料清单.
The STLQ020 is a 200 mA low-dropout voltage regulator, able to work with an input voltage ranging from 2 V to 5.5 V. The typical dropout voltage at maximum load is 160 mV. The ultra-low quiescent current, which is just 0.3 μA at no load on the adjustable version, extends battery-life of applications requiring very long standby time.
Even though the device intrinsic consumption is ultra-low, STLQ020 is able to provide fast transient response and good PSRR performance, thanks to its adaptive biasing circuit. enable pin puts the STLQ020 in shutdown mode, reducing total current consumption to 1 nA.
The STLQ020 is designed to keep the quiescent current under control and at a low value also during dropout operation, helping to extend even more the operating time of battery- powered devices.
It also includes short-circuit constant-current limiting and thermal protection. Several small package options are available.
STLQ02主要特性:
Operating input voltage range: 2 V to 5.5 V
Output current up to 200 mA
Ultra-low quiescent current:
300 nA typ. at no load (ADJ version)
100 μA typ. at 200 mA load
Controlled Iq in dropout conditions
Very low-dropout voltage: 160 mV at 200 mA
Output voltage accuracy:2% at room temperature,3% in full temperature range
Output voltage versions: from 0.8 V to 4.5 V, with 50 mV step and adjustable
Logic-controlled electronic shutdown
Output discharge feature (optional)
Internal overcurrent and thermal protections
Temperature range: from -40℃ to +125℃
Packages: DFN6-2x2, SOT323-5L, Flip-Chip4
STLQ02应用:
Smartphones/tablets
Image sensors
Wearable accessories
Healthcare devices
Metering
图1.STLQ02框图(固定频率版本)
图2.STLQ02框图(可调频率版本)
图3.STLQ02典型应用框图(固定频率版本)
图4.STLQ02典型应用框图(可调频率版本)
基于LDBL20, LDLN025, LD39130S和STLQ020的四路高性能LDO评估板STEVAL-LDO001V1
The STEVAL-LDO001V1 board features the following high performance low dropout linear voltage regulators in miniature packages:
- LDBL20 200 mA high PSSR low quiescent current in ST STAMP™ bumpless chip-scale package
- LDLN025 250 mA low noise, low quiescent current in Flip-Chip4
- LD39130S 300 mA ultra-low quiescent current in DFN6L
- STLQ020 200 mA very-low quiescent current in DFN6L
Using the quad LDO board with state-of-the-art very low dropout voltage regulators, you can easily evaluate performance levels in a single set-up to choose the best design solution.
The four miniaturized LDOs are designed for extend battery life in portable smart devices.
四路高性能LDO评估板STEVAL-LDO001V1主要特性:
Multi LDO evaluation board based on four high performance low dropout linear voltage regulators in miniature packages
Key features:
Low operating input voltage (from 1.4 V to 5.5 V)
Current capability from 200 mA to 300 mA
Low dropout (down to 160 mV typ.)
Ultra-low quiescent current (down to 500 nA typ.)
Low noise (down to 6.5 μVRMS typ.)
High PSSR (up to 80 dB)
Logic controlled electronic shutdown (enable)
Tiny packages (DFN-6L, Flip-chip, ST STAMP™)
RoHS compliant
评估板STEVAL-LDO001V1应用:
Wearable devices
IoT
Battery operated devices
Smart phones
Smart watches
Fit bands
Smart textile
Wireless sensor networks
图5.评估板STEVAL-LDO001V1外形图
图6.评估板STEVAL-LDO001V1电路图
评估板STEVAL-LDO001V1材料清单:
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