高输入电压(45V),低静止电流(2.1uA),线性调节器(LDO)MST54XXB

更新时间:2023-05-22 02:43:14 阅读：评论：0

⏹ Description

The MST54XXB ries is a high input voltage (45V), low quiescent current (2.1uA), low-dropout linear regulator (LDO) able to provide 300mA load current. The MST54XXB family LDO offers EN pin to enable and disable the LDO output, EN pin can take 45V input voltage.

The LDO features very fast respon against line voltage transient and load current transient, and ensures no overshoot voltage during the LDO start up and short circuit recovery.

The device features integrated short-circuit and thermal shutdown protection.

The device is available with fixed output voltages of 1.8V, 3.0V, 3.3V and 5.0V, and available in SOT23 and SOT89 packages.

⏹ Application

 Battery-powered equipment

 Smoke detector and nsor

 Micro controller Applications

 Home Appliance

⏹ Application Circuits

⏹ Features

 Low Quiescent Current：2.1uA

 High Input Voltage Rating：Up to 55V

 High Output Current：350mA

 High PSRR：85dB at 1kHZ

 Low Dropout Voltage：

35mV@10mA

350mV@100mA

 Fixed Output Voltages：

1.8V, 3.0V, 3.3V and 5.0V

 High-accuracy Output Voltage: ±2%

 Fast Transient Respon

 Integrated Short-Circuit Protection

 Enable pin is available

 Integrated Thermal Protection

 Available Packages：

MST54XXBTE MST54XXBTE-A MST5暗门4XXBTE-B MST54XXBTE-C	SOT23-3
MST54锁骨纹身图案女XXBTS MST54XXBTS-A MST54XXBTS-B MST54XXBTS-C	SOT89-3
MST54XXBTG	SOT23-5

⏹ Packages And Pin Assignment

⏹ Pin Descriptions

SOT23-3				PIN NAME	DESCRIPTION
MST54XXBTE	MST54XXBTE-A	MST54XXBTE-B	MST54XXBTE-C	PIN NAME	DESCRIPTION
1	2	3	3	GND	Ground Pin
2	1	2	1	VOUT	Output Pin
3	稻田大学 3	1二月二龙抬头	2	VIN	Input Pin
SOT89-3				PIN NAME	DESCRIPTION
MST54XXBTS	MST54XXBTS-A	MST54XXBTS-B	MST54XXBTS-C	PIN NAME	DESCRIPTION
空碗1	3	2	2	GND	Ground Pin
3	1朱子治家	3	1	VOUT	Output Pin
2	2	1	3	VIN	Input Pin
SOT23-5				PIN NAME	DESCRIPTION
MST54XXBTG				PIN NAME	DESCRIPTION
1				VIN唐朝统一战争	Input Pin
2				GND	Ground Pin
3				EN	爆炒鱿鱼丝Enable pin
4				NC	No Connection
5				VOUT	Output Pin

⏹ Functional Block Diagram

⏹ Absolute Maximum Ratings

Item	Description	Min	Max	Unit
Voltage	VIN to GND	-0.3	55	V
	VOUT to GND	-0.3	6	V
	VOUT to VIN	-55	0.3	V
	EN to GND	-0.3	55	V
Current	Peak output current	Internally limited
Temperature	Operating Ambient Temperature	-40	85	℃
	Storage Temperature	-40	150	℃
	Operating virtual junction Temperature	-	150	℃
Thermal Resistance (Junction to Ambient)	SOT89	180		℃/W
Thermal Resistance (Junction to Ambient)	SOT23	360		℃/W
Power Dissipation	SOT89	600		mW
Power Dissipation	SOT23	300		mW
Electrostatic discharge rating	Human Body Model（HBM）	4		kV
Electrostatic discharge rating	Charged Device Model（MM）	100		V

⏹ Electrical Characteristics

（At TA=25°C, CIN=1uF, VIN=VOUTNOM+1.0V, COUT=10uF, unless otherwi noted）

Symbol	Parameter	Test Conditions	MIN	TYP	MAX	UNIT
VIN	Input Voltage		3	—	45	V
IGND	Quiescent Current	VIN=12V, No load	—	2.1	—	uA
VOUT	Output Voltage	VIN=12V, IOUT=10mA	VOUTNOM * 0.98	VOUTNOM	VOUTNOM * 1.02	V
IOUT_MAX	Output Current		300	350	—	mA
VDROP	Dropout Voltage(1)	IOUT=10mA , VIN=VOUTNOM-0.1V	—	35	—	mV
VDROP	Dropout Voltage(1)	IOUT=100mA , VIN=VOUTNOM-0.1V	—	350	—	mV
ΔVOUT(ΔIOUT)	Load Regulation	VIN=12V, 1mA≤IOUT≤100mA	—	0.02	—	%/mA
ΔVOUT(ΔVIN)	Line Regulation	IOUT=1mA, VOUTNOM+0.5V≤VIN≤40V	—	0.01	—	%/V
ILIMIT	Current Limit		—	500	—	mA
TSHDN	Thermal Shutdown Temperature	Shutdown, temperature increasing	—	150	—	℃
TSHDN	Thermal Shutdown Temperature	Ret, temperature decreasing	—	140	—	℃
PSRR		Vin=12V , Iout=10mA F=1Khz,Vout=3.3V		85		dB
VENH	EN High level	Enabled	1	—	—	V
VENL	EN Low level	Shutdown	—	—	0.4	V

Note：(1) Dropout Voltage is the voltage difference between the input and the output at which the output voltage drops 2% below its nominal value.

⏹ Typical Performance Characteristics

Test Condition: TA=25°C,Iout=1mA, COUT=10uF, unless otherwi note

Load Transient Respon Time(4us/div)	Load Transient Respon Time(4us/div)
120mV Time(20us/div) Start Up -280mV	Time(200us/div) Start Up
Short Circuit Protection Time(100us/div)	Short Circuit Protection Time(100us/div)
Time(20ms/div)	Time(2ms/div)

Line Transient Respon

⏹ Functional Description

Input Capacitor

A 1μF ceramic capacitor is recommended to connect between VIN and GND pins to decouple input power supply glitch and noi. The amount of the capacitance may be incread without limit. This input capacitor must be located as clo as possible to the device to assure input stability and less noi. For PCB layout, a wide copper trace is required for both VIN and GND.

Output Capacitor

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