The CST75XX 36V series is a high voltage，ultralow-power，low dropout voltage regulator. The device can deliver 150mA output current with a dropout voltage of 300mV and allows an input voltage as high as 36V. The typical quiescent current is only 1.5µA. The device is available in fixed output voltages of 1.8,2.5,2.8,3.0,3.3,3.6,4.0,4.2,4.4 and 5.0V.The device features integrated shortcircuit and thermal shutdown protection.Although designed primarily as fixed voltage regulators, the device can be used with external components to obtain variable voltages.

CST75XX Features:

Low Power Consumption: 1.5µA (Typ)

Good Transient Response

Maximum Output Current: 150mA

Integrated Short-Circuit Protection

Small Dropout Voltage

  300mV@100mA (Vout=3.3V)

Over-Temperature Protection

Output Current Limit

High Input Voltage: Up to 36V

Stable with Ceramic Capacitor

High Accurate:

  CST75XX (B) ±2% Output Voltage

  CST75XX (A) ±1% Output Voltage

Support Fixed Output Voltage:

  1.8,2.5,2.8.3.0,3.3,3.6,4.0,4.2,4.4and 5.0V

RoHS Compliant and Lead (Pb) Free 

Available Package:

  SOT23-3L\SOT89-3L\DFN4\DFN3\SOT23-5L

CST75XX Application:

Portable, Battery Powered Equipment

Smoke detector and sensor

Battery-powered equipment

Audio/Video Equipmen

Weighting Scales

Home Automation

CST75XX Application Circuits:

CST75XX Order Information:

CST75XX①②-③④⑤

Designator	Symbol	Description
①②	S3/P3/D4/D3/S5	SOT23-3L / SOT89-3L / DFN4L / DFN3L / SOT23-5L
③④	Integer	Output Voltage 1.8,2.5,2.8.3.0,3.3,3.6,4.0,4.2,4.4 and 5.0V
⑤	A	Accurate ±1%
	B	Accurate ±2%

Model	Marking	Description	Package	T/R Qty
CST75XXS3-XX*	AFXXA(B)	CST75XX 36V;1.5µA IQ, 150mA Low-Dropout LDO	SOT23-3L	3,000 PCS
CST75XXP3-XX*	AFXXA(B)		SOT89-3L	1,000 PCS
CST75XXS5-XX*	AFXXA(B)		SOT23-5L	3,000 PCS
CST75XXD4-XX*	**		DFN1X1-4L	10,000 PCS
CST75XXD3-XX*	**		DFN2X2-3L	1,000 PCS

CST75XX Function Block Diagram: