• [ 产品资料下载 ]

样品申请

目录aH1嘉泰姆

1.产品概述                       2.产品特点aH1嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 aH1嘉泰姆
5.产品封装图                     6.电路原理图                   aH1嘉泰姆
7.功能概述                        8.相关产品aH1嘉泰姆

一,产品概述(General Description)         aH1嘉泰姆

          The CXSU63138 is a fixed switching frequency (1.5MHz typical), current-mode,aH1嘉泰姆
step-up regulator with an inte-grated N-channel MOSFET. The device allows the usageaH1嘉泰姆
of small inductors and output capacitors for portable devices. The current-mode control aH1嘉泰姆

scheme provides fast transient response and good output voltage accuracy. The CXSU63138 includes under-voltage lockout, current-limit, and over-temperature shutdown preventing aH1嘉泰姆

dam-age in the event of an output overloadaH1嘉泰姆
二.产品特点(Features)aH1嘉泰姆

1.)Wide 2.7V to 6V Input Voltage RangeaH1嘉泰姆
2.)Built-in 0.2Ω N-Channel MOSFETaH1嘉泰姆
3.)Built-in Soft-StartaH1嘉泰姆
4.)High Efficiency up to 90%aH1嘉泰姆
5.)<1μA Quiescent Current During ShutdownaH1嘉泰姆
6.)Current-Mode OperationaH1嘉泰姆
    Stable with Ceramic Output CapacitorsaH1嘉泰姆
    Fast Transient ResponseaH1嘉泰姆
7.)Current-Limit ProtectionaH1嘉泰姆
8.)Over-Temperature Protection with HysteresisaH1嘉泰姆
9.)Available in a TSOT-23-5A and TDFN2x2-6 Pack-ageaH1嘉泰姆
10.)Lead Free and Green Devices Available(RoHS Compliant)aH1嘉泰姆
三,应用范围 (Applications)aH1嘉泰姆

Cell Phone and Smart PhoneaH1嘉泰姆
PDA, PMP, MP3aH1嘉泰姆
Digital CameraaH1嘉泰姆
Boost RegulatorsaH1嘉泰姆
四.下载产品资料PDF文档 aH1嘉泰姆

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！aH1嘉泰姆

 aH1嘉泰姆

五,产品封装图 (Package)aH1嘉泰姆

aH1嘉泰姆

六.电路原理图aH1嘉泰姆

aH1嘉泰姆
aH1嘉泰姆

aH1嘉泰姆

七,功能概述aH1嘉泰姆

Main Control LoopaH1嘉泰姆
The CXSU63138 is a constant frequency and current-mode switching regulator. In normal operation, the internal aH1嘉泰姆

N-channel power MOSFET is turned on each cycle when the oscillator sets an internal RS latch,aH1嘉泰姆

 and then turned off when an internal comparator (ICMP) resets the latch. The peak inductor aH1嘉泰姆

current at which ICMP resets the RS latch is controlled by the voltage on the COMP node whichaH1嘉泰姆

is the output of the error amplifier (EAMP). An external resis-tive divider connected between aH1嘉泰姆

VOUT and ground allows the EAMP to receive an output feedback voltage VFB at FB pin. WhenaH1嘉泰姆

the load current increases, it causes a slightly to decrease in VFB associated with the 1.23VaH1嘉泰姆

reference,which in turn, it causes the COMP voltage to increase until the average inductor aH1嘉泰姆

current matches the new load current. aH1嘉泰姆

VIN Under-Voltage Lockout (UVLO)aH1嘉泰姆
The Under-Voltage Lockout (UVLO) circuit compares the input voltage at VIN with the UVLOaH1嘉泰姆

 threshold to ensure the input voltage is high enough for reliable operation.The 100mV (typ) aH1嘉泰姆

hysteresis prevents supply transients from causing a restart. Once the input voltage exceeds aH1嘉泰姆

the UVLO rising threshold, startup begins. When the in-put voltage falls below the UVLO fallingaH1嘉泰姆

 threshold, the controller turns off the converter.aH1嘉泰姆
Soft-StartaH1嘉泰姆
The CXSU63138 has a built-in soft-start to control the output voltage rise during start-up. During soft-start, anaH1嘉泰姆

 internal ramp voltage, connected to the one of the positive inputs of the error amplifier, raises up to replace the aH1嘉泰姆

reference voltage (1.23V typical) until the ramp voltage reaches the reference voltage.aH1嘉泰姆
Current-Limit ProtectionaH1嘉泰姆
The CXSU63138 monitors the inductor current, flows through the N-channel MOSFET, and limitsaH1嘉泰姆

 the current peak at current-limit level to prevent loads and the CXSU63138 from damaging during overload or aH1嘉泰姆

short-circuit conditions.aH1嘉泰姆

Over-Temperature Protection (OTP)aH1嘉泰姆
The over-temperature circuit limits the junction tempera-ture of the CXSU63138. When the aH1嘉泰姆

junction temperature  ex-ceeds 150 oC, a thermal sensor turns off the power MOSFET allowingaH1嘉泰姆

 the devices to cool. The thermal sen-sor allows the converters to start a soft-start process and aH1嘉泰姆

regulates the output voltage again after the junction tem-perature cools by 40oC. The OTP is designed aH1嘉泰姆

with a 40oC hysteresis to lower the average Junction Temperature (TJ) during continuous thermal overloadaH1嘉泰姆

 conditions in-creasing the lifetime of the device. aH1嘉泰姆

Enable/ShutdownaH1嘉泰姆
Driving EN to the ground places the CXSU63138 in shut-down mode. When in shutdown, the internal poweraH1嘉泰姆
MOSFET turns off, all internal circuitry shuts down, and the quiescent supply current reduces to 1μA maximum.aH1嘉泰姆
八,相关产品              更多同类产品......aH1嘉泰姆

aH1嘉泰姆

◀ 上一篇:2.6V至6.5V输入电源VGON和VGOFF的线性调节器控制器CXSU63137电流模式升压调节器大电流运算放大器

返回顶部

下一篇▶:固定1.2兆赫振荡器频率同步整流器CXSU63139低ESR输出电容稳定电流模式升压调节器92%效率

共有条评论 用户名: 密码: 验证码: 匿名发表