The CST9005 series are highly precise, low noise, positive voltage LDO regulators manufactured using CMOS processes. 

    The series achieves high ripple rejection and low dropout and consists of a standard voltage source, an error correction, current limiter and a phase compensation circuit plus a driver transistor. Output voltage is selectable in 0.05V increments within a range of 0.8V ~ 3.6V. 

    The series is also compatible with low ESR ceramic capacitors which give added output stability.

    It provides up to 500mA of output current in miniaturized packaging. 

    The features of low quiescent current as low as 0.3μA and almost zero disable current is ideal for powering the battery equipment to a longer service life. The other features include current limit function, Integrated Short-Circuit Protection ,over temperature protection and Fast discharge function.

    CST9005系列是高精度、低噪声、正电压LDO稳压器使用CMOS工艺制造。

    该系列实现了高纹波抑制和低损耗它由一个标准电压源、一个误差校正、限流器和一个相位组成补偿电路加上驱动晶体管。输出电压可在范围为0.8V～3.6V。

    该系列还兼容低ESR陶瓷电容器提供额外的输出稳定性。它在小型封装中提供高达500mA的输出电流。

    低至0.3μA的低静态电流和几乎为零的禁用电流的特性非常适合为电池设备提供更长的使用寿命。

    其他功能包括电流限制功能、集成短路保护、超温保护和快速放电作用

CST9005 Features/特性：

Low Power Consumption: 0.3uA (Typ)

Maximum Output Current: 500mA

Small Dropout Voltage 100mV@100mA (Vout=3.3V)

PSRR=70dB@1KHz

Input Voltage Range: 2.0V~7.0V

Output Voltage Range: 0.8V~3.6V (customized on command in 0.05V steps)

High Accurate: ±1.5%

Integrated Short-Circuit Protection

Good Transient Response

Over-Temperature Protection

Support Fixed Output Voltage

Output Current Limit

Stable with Ceramic Capacitor

Available Package SOT23-3 \ SOT23-5 \ SOT89-3 \ DFN1x1-4L

RoHS Compliant and Lead (Pb) Free

CST9005 Application/应用:

Battery-powered equipment

Reference voltage sources

Low Power Microcontrollers

Wireless Communication Equipment

Audio/Video Equipment

Portable games

CST9005 Application Circuits/应用电路:

CST9005 Pin Configuration/引脚配置:

CST9005 Order Information/订购信息:

Designator	Symbol	Description
①②	S3/S5/P3/D4	SOT23-3L/SOT23-5L/ SOT89-3L/DFN1x1-4L
③④	Integer	Output Voltage (09、10、12、15、18、25、、28、30、33、36)

Model	Marking**	Description	Package	T/R Qty
CST9005S3-XX*	-----	CST9005 0.3μA IQ ,High PSRR 500mA Low-Dropout  LDO	SOT23-3L	3,000 PCS
CST005S5-XX*	-----		SOT23-5L	3,000 PCS
CST9005P3-XX*	-----		SOT89-3L	1,000 PCS
CST9005D4-XX*	-----		DFN1x1-4L	10,000 PCS

CST9005 Function Block Diagram/功能框图: