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首页 > 产品中心 > 电源管理 > DC升压型转换器 > DC升压转换 >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
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
13

CXSU63139是同步整流器,固定开关频率(典型为1.2兆赫),以及电流模式升压调节器。该设备允许使用USB设备的小电感和输出电容器。电流模式控制方案具有快速的瞬态响应和良好的输出电压精度,在轻负载时,CXSU63139将自动进入脉冲频率调制(PFM)操作,以降低主开关损耗

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
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产品简介

目录u0P嘉泰姆

1.产品概述                       2.产品特点u0P嘉泰姆
3.应用范围                       4.下载产品资料PDF文档 u0P嘉泰姆
5.产品封装图                     6.电路原理图                   u0P嘉泰姆
7.功能概述                        8.相关产品u0P嘉泰姆

一,产品概述(General Description)         u0P嘉泰姆


      The CXSU63139 is a synchronous rectifier, fixed switching frequency (1.2MHz typical), andu0P嘉泰姆
current-mode step-up regulator. The device allows use of small inductors and output capacitors for USB devices. The current-mode control scheme provides fast transient response and good output voltage accuracy.At light loads, the CXSU63139 will automatically enter in Pulse Frequency Modulation (PFM) operation to reduce the dominant switching losses. During PFM operation,the IC consumes very low quiescent current and maintains high efficiency over the complete load range.u0P嘉泰姆
      The CXSU63139 also includes current-limit and over-temperature shutdown to prevent damageu0P嘉泰姆
in the event of an output overload.u0P嘉泰姆
      The CXSU63139 is available in 4mmx4mm TQFN4x4-16 and DFN3x3-12 packages.u0P嘉泰姆
二.产品特点(Features)u0P嘉泰姆


1.)92% Effiicency Synchronous Boost Converter With 1000-mA Output Current Fromu0P嘉泰姆
      1.8V Input
u0P嘉泰姆
2.)Stable with Low ESR Output Capacitorsu0P嘉泰姆
3.)Fixed 1.2MHz Oscillator Frequencyu0P嘉泰姆
4.)Low EMI Converter (Integrated Anti-Ringing Function)u0P嘉泰姆
5.)Low Battery Outputu0P嘉泰姆
6.)Integrated Power Save Mode Operation to Improve Light Load Efficiencyu0P嘉泰姆
7.)Load Disconnected During Shutdownu0P嘉泰姆
8.)Output Current-Limit Protectionu0P嘉泰姆
9.)Over Temperature Protectionu0P嘉泰姆
10.)Under Voltage Protectionu0P嘉泰姆
11.)Enable/Shutdown Functionu0P嘉泰姆
12.)Available in TQFN4x4-16 and DFN3x3-12 Packagesu0P嘉泰姆
13.)Lead Free and Green Devices Available (RoHS Compliant)u0P嘉泰姆
三,应用范围 (Applications)u0P嘉泰姆


Power Banku0P嘉泰姆
Tabletu0P嘉泰姆
Portable Equimentu0P嘉泰姆
四.下载产品资料PDF文档 u0P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u0P嘉泰姆

 QQ截图20160419174301.jpgu0P嘉泰姆

五,产品封装图 (Package)u0P嘉泰姆


u0P嘉泰姆

PINu0P嘉泰姆

NAMEu0P嘉泰姆

FUNCTIONu0P嘉泰姆

1,15,16u0P嘉泰姆

VOUTu0P嘉泰姆

Converter Output and IC Supply Voltage.u0P嘉泰姆

2u0P嘉泰姆

NCu0P嘉泰姆

Enable in Charge Doneu0P嘉泰姆
No Internal Connection.u0P嘉泰姆

3,4u0P嘉泰姆

SWu0P嘉泰姆

Converter Switch Pin. Connect inductor here.u0P嘉泰姆

5,6,7u0P嘉泰姆

PGNDu0P嘉泰姆

Enable in Charge Doneu0P嘉泰姆
Power Ground. Connect these pins to GND.u0P嘉泰姆

8u0P嘉泰姆

VBATu0P嘉泰姆

Converter Supply Voltage.                      Enable in Charge Doneu0P嘉泰姆

9u0P嘉泰姆

LBIu0P嘉泰姆

Low Battery Indicator.u0P嘉泰姆

10u0P嘉泰姆

PSIu0P嘉泰姆

Power Saving Input. Force VPSI exceed 1V enter PFM. Left VPSI below 0.4V enter PWM mode.u0P嘉泰姆

11u0P嘉泰姆

ENu0P嘉泰姆

Device Enable Control Input. Force VEN exceed 1V enable the device. Left VEN below 0.4V tou0P嘉泰姆
shutdown.u0P嘉泰姆

12u0P嘉泰姆

LBOu0P嘉泰姆

Low Battery Output.u0P嘉泰姆

13u0P嘉泰姆

GNDu0P嘉泰姆

Signal Ground. Connect this pin to PGND.u0P嘉泰姆

14u0P嘉泰姆

FBu0P嘉泰姆

Converter Feedback Input.u0P嘉泰姆

Exposed Padu0P嘉泰姆

PGNDu0P嘉泰姆

Power Ground. Tie this pin to the ground island/plane through the lowest impedance connectionu0P嘉泰姆
available.u0P嘉泰姆

六.电路原理图u0P嘉泰姆


blob.pngu0P嘉泰姆

七,功能概述u0P嘉泰姆


Main Control Loopu0P嘉泰姆

The CXSU63139 is a constant frequency, synchronous rectifier, and current-mode switching regulator. u0P嘉泰姆

In normal operation, the internal N-channel power MOSFET is turned on each cycle when the oscillatoru0P嘉泰姆

 sets an internal RS latch and turned off when an internal comparator (ICMP) resets the latch. The peaku0P嘉泰姆

 inductor current which ICMP resets the RS latch is controlled by the voltage on the COMP node, which u0P嘉泰姆

is the output of the error amplifier (EAMP). An external resistive divider connected between VOUT and u0P嘉泰姆

ground allows the EAMP to receive an output feedback voltage VFB at FB pin. When the load current u0P嘉泰姆

increases, it causes a slightly decrease in VFB relative to the 0.5V reference, which in turn causes theu0P嘉泰姆

 COMP volt- age to increase until the average inductor current matches the new load current.u0P嘉泰姆
 Start-upu0P嘉泰姆
A start-up oscillator circuit is integrated in the CXSU63139.When the device enables, the circuit pumpsu0P嘉泰姆

 the output voltage high. Once the output voltage reaches 1.6V (typ),the main DC-DC circuitry turns onu0P嘉泰姆

 and boosts the output voltage to the final regulation voltage. u0P嘉泰姆
Automatic PFM/PWM mode Switchu0P嘉泰姆
The CXSU63139 is a fixed frequency PWM peak current modulation control step-up converter. At lightu0P嘉泰姆

 loads, theCXSU63139 will automatically enter in pulse frequency modulation operation to reduce the u0P嘉泰姆

dominant switching losses. In PFM operation, the inductor current may reach zero or reverse on eachu0P嘉泰姆

 pulse. A zero current comparator turns off the P-channel synchronous MOSFET, forcing DCM(Discontinuousu0P嘉泰姆

 Current Mode) operation at light load.These controls get very low quiescent current, help to maintain u0P嘉泰姆

high efficiency over the complete load range. u0P嘉泰姆
Synchronous Rectificationu0P嘉泰姆
The internal synchronous rectifier eliminates the need for an external Schottky diode, thus reducing costu0P嘉泰姆

 and board space. During the cycle off-time, the P-FET turns on and shunts the FET body diode. As a u0P嘉泰姆

result, the syn-chronous rectifier significantly improves efficiency with-out the addition of an externalu0P嘉泰姆

 component. Conversion efficiency can be as high as 92%.u0P嘉泰姆
Load Disconnectu0P嘉泰姆
Driving EN to ground places the CXSU63139 in shutdown mode. When in shutdown, the internal poweru0P嘉泰姆

 MOSFET turns off, all internal circuitry shuts down and the quies-cent supply current reduces to 1μAu0P嘉泰姆

 maximum.A special circuit is applied to disconnect the load from the input during shutdown the u0P嘉泰姆

converter. In conventional syn-chronous rectifier circuits, the back-gate diode of the high-side P-FET u0P嘉泰姆

is forward biased in shutdown and allows current flowing from the battery to the output. However,thisu0P嘉泰姆

 device uses a special circuit, which takes the cath-ode of the back-gate diode of the high-side P-FETu0P嘉泰姆

 and disconnects it from the source when the regulator is shutdown. The benefit of this feature for u0P嘉泰姆

the system de-sign engineer is that the battery is not depleted during shutdown of the converter.  u0P嘉泰姆

No additional componentsmust be added to the design to make sure that the bat-tery is disconnectedu0P嘉泰姆

 from the output of the converter. u0P嘉泰姆
Current-Limit Protectionu0P嘉泰姆
The CXSU63139 monitors the inductor current, flowing through the N-FET, and  limits the current u0P嘉泰姆

peak at current-limit level to prevent loads and the CXSU63139 from dam-ages during overloadu0P嘉泰姆

 conditions.u0P嘉泰姆
Over-Temperature Protection (OTP)u0P嘉泰姆
The over-temperature circuit limits the junction tempera-ture of the CXSU63139. When the junctionu0P嘉泰姆

 temperature ex-ceeds 150oC, a thermal sensor turns off the both N-FETand P-FET, allowing the u0P嘉泰姆

devices to cool. The thermal sensor allows the converters to start a soft-start process and regulateu0P嘉泰姆

 the output voltage again after the junction temperature cools by 30oC. The OTP is designed with u0P嘉泰姆

a 30oC hysteresis to lower the average Junction Tempera-ture (TJ) during continuous thermal overload conditions,increasing the lifetime of the device.u0P嘉泰姆

八,相关产品                 更多同类产品......u0P嘉泰姆


Switching Regulator > Boost Converteru0P嘉泰姆

 Part_No u0P嘉泰姆

Packageu0P嘉泰姆

Archi-tecture u0P嘉泰姆

Input u0P嘉泰姆

Voltage    u0P嘉泰姆

Max Adj.u0P嘉泰姆

Output u0P嘉泰姆

Voltage u0P嘉泰姆

Switch Current Limit (max) u0P嘉泰姆

Fixed u0P嘉泰姆

Output u0P嘉泰姆

Voltage  u0P嘉泰姆

Switching u0P嘉泰姆

Frequency u0P嘉泰姆

Internal Power   Switch u0P嘉泰姆

Sync. Rectifier u0P嘉泰姆

 

minu0P嘉泰姆

maxu0P嘉泰姆

minu0P嘉泰姆

maxu0P嘉泰姆

(A)u0P嘉泰姆

(V)u0P嘉泰姆

(kHz)u0P嘉泰姆

 

CXSU63133u0P嘉泰姆

SOT89u0P嘉泰姆

VM u0P嘉泰姆

0.9u0P嘉泰姆

5.5u0P嘉泰姆

2.5u0P嘉泰姆

5.5u0P嘉泰姆

0.5u0P嘉泰姆

1.8|2.6|2.8|3u0P嘉泰姆

|3.3|3.8|4.5|5u0P嘉泰姆

-u0P嘉泰姆

Nou0P嘉泰姆

Yesu0P嘉泰姆

CXSU63134u0P嘉泰姆

MSOP8|TSSOP8u0P嘉泰姆

|SOP8u0P嘉泰姆

VMu0P嘉泰姆

2.5u0P嘉泰姆

5.5u0P嘉泰姆

2.5u0P嘉泰姆

-u0P嘉泰姆

-u0P嘉泰姆

-u0P嘉泰姆

200 ~ 1000u0P嘉泰姆

Nou0P嘉泰姆

Nou0P嘉泰姆

CXSU63135u0P嘉泰姆

TSSOP8|SOP-8Pu0P嘉泰姆

VMu0P嘉泰姆

1u0P嘉泰姆

5.5u0P嘉泰姆

2.5u0P嘉泰姆

5u0P嘉泰姆

1u0P嘉泰姆

2.5|3.3u0P嘉泰姆

300u0P嘉泰姆

Yesu0P嘉泰姆

Yesu0P嘉泰姆

CXSU63136u0P嘉泰姆

SOP8u0P嘉泰姆

CMu0P嘉泰姆

3u0P嘉泰姆

40u0P嘉泰姆

1.25u0P嘉泰姆

40u0P嘉泰姆

1.5u0P嘉泰姆

-u0P嘉泰姆

33 ~ 100u0P嘉泰姆

Yesu0P嘉泰姆

Nou0P嘉泰姆

CXSU63137u0P嘉泰姆

TQFN5x5-32u0P嘉泰姆

CMu0P嘉泰姆

2.5u0P嘉泰姆

6.5u0P嘉泰姆

2.5u0P嘉泰姆

18u0P嘉泰姆

3u0P嘉泰姆

Nou0P嘉泰姆

1200u0P嘉泰姆

Yesu0P嘉泰姆

Nou0P嘉泰姆

CXSU63138u0P嘉泰姆

TSOT23-5u0P嘉泰姆

TDFN2x2-6u0P嘉泰姆

CMu0P嘉泰姆

2.5u0P嘉泰姆

6u0P嘉泰姆

2.5u0P嘉泰姆

20u0P嘉泰姆

2u0P嘉泰姆

-u0P嘉泰姆

1500u0P嘉泰姆

Yesu0P嘉泰姆

Nou0P嘉泰姆

CXSU63139u0P嘉泰姆

TQFN4x4-6u0P嘉泰姆

TDFN3x3-12u0P嘉泰姆

CMu0P嘉泰姆

1.8u0P嘉泰姆

5.5u0P嘉泰姆

2.7u0P嘉泰姆

5.5u0P嘉泰姆

5u0P嘉泰姆

-u0P嘉泰姆

1.2u0P嘉泰姆

Yesu0P嘉泰姆

Yesu0P嘉泰姆

CXSU63140u0P嘉泰姆

SOT23-5u0P嘉泰姆

CMu0P嘉泰姆

2.5u0P嘉泰姆

6u0P嘉泰姆

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32u0P嘉泰姆

1u0P嘉泰姆

-u0P嘉泰姆

1000u0P嘉泰姆

Yesu0P嘉泰姆

Nou0P嘉泰姆

CXSU63141u0P嘉泰姆

TSOT-23-6 u0P嘉泰姆

TDFN2x2-8u0P嘉泰姆

CMu0P嘉泰姆

1.2u0P嘉泰姆

5.5u0P嘉泰姆

1.8u0P嘉泰姆

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-u0P嘉泰姆

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u0P嘉泰姆

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