2.5V至6V输入电压0.6ΩN沟道MOSFET内置软启动CXSU63140固定开关频率电流模式升压集成N沟道MOSFET的稳压器

CXSU63140是一种固定开关频率（典型为1MHz）、电流模式、升压集成N沟道MOSFET的稳压器。该设备允许使用便携式设备用电感器和输出电容器。当前模式控制方案提供快速的瞬态响应和良好的输出电压精度欠压闭锁、限流、超温停堆-输出过载时的老化

目录

1.产品概述                       2.产品特点
3.应用范围                       4.下载产品资料PDF文档 
5.产品封装图                     6.电路原理图                   
7.功能概述                        8.相关产品

一,产品概述(General Description)  

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           The CXSU63140 is a fixed switching frequency (1MHz typical), current-mode, step-up
regulator with an inte-grated N-channel MOSFET. The device allows the usage of small
inductors and output capacitors for portable devices. The current-mode control scheme
provides fast transient response and good output voltage accuracy.The CXSU63140 includes
under-voltage lockout, current-limit, and over-temperature shutdown preventing dam-
age in the event of an output overload
二.产品特点(Features)

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1.)Wide 2.5V to 6V Input Voltage Range
2.)Built-in 0.6Ω N-Channel MOSFET
3.)Built-in Soft-Start
4.)High Efficiency up to 90%
5.)<1μA Quiescent Current During Shutdown
6.)Current-Mode Operation
    Stable with Ceramic Output Capacitors
    Fast Transient Response
7.)Current-Limit Protection
8.)Over-Temperature Protection with Hysteresis
9.)Available in a Tiny 5-Pin SOT-23 and TSOT-23Packages
10.)Lead Free and Green Devices Available(RoHS Compliant)
三,应用范围 (Applications)

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Cell Phone and Smart Phone
PDA, PMP, MP3
Digital Camera
Boost Regulators
四.下载产品资料PDF文档 

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需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！

 

五,产品封装图 (Package)

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PIN.		FUNCTION
NO	NAME
1	LX	Switch pin. Connect this pin to inductor/diode here.
2	GND	Power and signal ground pin.
3	FB	Feedback Input. The device senses feedback voltage via FB and regulate the voltage at 1.23V. Connecting FB with a resistor-divider from the output that sets the output voltage in the range from VIN to 30V.
4	EN	Enable Control Input. Forcing this pin above 1.0V enables the device. Forcing this pin below 0.4V to shut it down. In shutdown, all functions are disabled to decrease the supply current below 1μA. Do not left this pin floating.
5	VIN	Main Supply Pin. Must be closely decoupled to GND with a 2.2μF or greater ceramic capacitor.

六.电路原理图

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七,功能概述

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Main Control Loop
The CXSU63140 is a constant frequency and current-mode switching regulator. In normal operation, 

the internal N-channel power MOSFET is turned on each cycle when the oscillator sets an internal

 RS latch, and then turned off when an internal comparator (ICMP) resets the latch. The peak inductor

 current at which ICMP resets the RS latch is controlled by the voltage on the COMP node which is the

 output of the error amplifier (EAMP). An external resis-tive divider connected between VOUT and 

ground allows the EAMP to receive an output feedback voltage VFB at FB pin. When the load current

 increases, it causes a slightly to decrease in VFB associated with the 1.23V reference,which in turn, 

it causes the COMP voltage to increase until the average inductor current matches the new load current. 
VIN Under-Voltage Lockout (UVLO)
The Under-Voltage Lockout (UVLO) circuit compares the input voltage at VIN with the UVLO threshold 

to ensure the input voltage is high enough for reliable operation.The 100mV (typ) hysteresis prevents

 supply transients from causing a restart. Once the input voltage exceeds the UVLO rising threshold,

 startup begins. When the in-put voltage falls below the UVLO falling threshold, the controller turns

 off the converter.
Soft-Start
The CXSU63140 has a built-in soft-start to control the output voltage rise during start-up. During 

soft-start, an internal ramp voltage, connected to the one of the positive inputs of the error 

amplifier, raises up to replace the reference voltage (1.23V typical) until the ramp voltage 

reaches the reference voltage.
Current-Limit Protection
The CXSU63140 monitors the inductor current, flows through the N-channel MOSFET, and 

limits the current peak at current-limit level to prevent loads and the CXSU63140 from 

damaging during overload or short-circuit conditions.
Over-Temperature Protection (OTP)
The over-temperature circuit limits the junction tempera-ture of the CXSU63140. When 

the junction temperature ex-ceeds 150 oC, a thermal sensor turns off the power MOSFET

 allowing the devices to cool. The thermal sen-sor allows the converters to start a soft-start

 process and regulates the output voltage again after the junction tem-perature cools by 40oC. 

The OTP is designed with a 40oC hysteresis to lower the average Junction Temperature
(TJ) during continuous thermal overload conditions in-creasing the lifetime of the device.
Enable/Shutdown
Driving EN to the ground places the CXSU63140 in shut- down mode. When in shutdown, 

the internal power MOSFET turns off, all internal circuitry shuts down, andthe quiescent 

supply current reduces to 1μA maximum.
八,相关产品                    更多同类产品......

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Switching Regulator > Boost Converter
Part_No	Package	Archi-tecture	Input  Voltage		Max Adj. Output  Voltage		Switch Current Limit (max)	Fixed  Output  Voltage	Switching  Frequency	Internal Power   Switch	Sync. Rectifier
			min	max	min	max	(A)	(V)	(kHz)
CXSU63133	SOT89	VM	0.9	5.5	2.5	5.5	0.5	1.8|2.6|2.8|3 |3.3|3.8|4.5|5	-	No	Yes
CXSU63134	MSOP8|TSSOP8 |SOP8	VM	2.5	5.5	2.5	-	-	-	200 ~ 1000	No	No
CXSU63135	TSSOP8|SOP-8P	VM	1	5.5	2.5	5	1	2.5|3.3	300	Yes	Yes
CXSU63136	SOP8	CM	3	40	1.25	40	1.5	-	33 ~ 100	Yes	No
CXSU63137	TQFN5x5-32	CM	2.5	6.5	2.5	18	3	No	1200	Yes	No
CXSU63138	TSOT23-5 TDFN2x2-6	CM	2.5	6	2.5	20	2	-	1500	Yes	No
CXSU63139	TQFN4x4-6 TDFN3x3-12	CM	1.8	5.5	2.7	5.5	5	-	1.2	Yes	Yes
CXSU63140	SOT23-5	CM	2.5	6	2.5	32	1	-	1000	Yes	No
CXSU63141	TSOT-23-6  TDFN2x2-8	CM	1.2	5.5	1.8	5.5	1.2	-	1.2	Yes	Yes