2A异步降压型转换器CXSD62123电流模式控制4.5～26V的输入电压PSM/PWM模式下调节输出电压

首页 > 新闻中心 > 行业新闻

发表时间：2020-04-24浏览次数：128

2A异步降压型转换器CXSD62123电流模式控制4.5～26V的输入电压PSM/PWM模式下调节输出电压

目录ho7嘉泰姆

1.产品概述         2.产品特点ho7嘉泰姆
3.应用范围       4.下载产品资料PDF文档 ho7嘉泰姆
5.产品封装图                     6.电路原理图             ho7嘉泰姆
7.功能概述       8.相关产品ho7嘉泰姆

一,产品概述(General Description) ho7嘉泰姆
The CXSD62123 is a 2A, asynchronous, step-down con-verter with integratedho7嘉泰姆
100mΩ P-channel MOSFET. The device, with current-mode control scheme, canho7嘉泰姆
convert 4.5~26V input voltage to the output voltage adjustable from 0.8 to 90%ho7嘉泰姆

VIN to provide excellent output voltage regulation.ho7嘉泰姆
The CXSD62123 regulates the output voltage in automatic PSM/PWM modeho7嘉泰姆
operation, depending on the output current, for high efficiency operation over lightho7嘉泰姆
to full load current. The CXSD62123 is also equipped with power-on-reset, soft-start, and whole protections (under-voltage,over- temperature, and current-limit) ho7嘉泰姆

into a single package.In shutdown mode, the supply current drops below 5μA.ho7嘉泰姆

This device, available in a 8-pin SOP-8 package, pro-vides a very compact ho7嘉泰姆

system solution with minimal exter-nal components.ho7嘉泰姆
二.产品特点(Features)ho7嘉泰姆
Wide Input Voltage from 4.5V to 26Vho7嘉泰姆
Output Current up to 2Aho7嘉泰姆
Adjustable Output Voltage from 0.8V to 90%VINho7嘉泰姆
- 0.8V Reference Voltageho7嘉泰姆
- ±2.5% System Accuracyho7嘉泰姆
100mΩ Integrated P-Channel Power MOSFETho7嘉泰姆
High Efficiency up to 91%ho7嘉泰姆
- Pulse-Skipping Mode (PSM) / PWM Mode Op-erationho7嘉泰姆
Current-Mode Operationho7嘉泰姆
- Stable with Ceramic Output Capacitorsho7嘉泰姆
- Fast Transient Responseho7嘉泰姆
Power-On-Reset Monitoringho7嘉泰姆
Fixed 380kHz Switching Frequency in PWM Modeho7嘉泰姆
Built-in Digital Soft-Startho7嘉泰姆
Output Current-Limit Protection with Frequency Foldbackho7嘉泰姆
70% Under-Voltage Protectionho7嘉泰姆
Over-Temperature Protectionho7嘉泰姆
<5μA Quiescent Current During Shutdown SOP-8 Packageho7嘉泰姆
Lead Free and Green Devices Available (RoHS Compliant)ho7嘉泰姆
三,应用范围 (Applications)ho7嘉泰姆
LCD Monitor / TVho7嘉泰姆
Set-Top Boxho7嘉泰姆
Portable DVDho7嘉泰姆
Wireless LANho7嘉泰姆
ADSL, Switch HUBho7嘉泰姆
Notebook Computerho7嘉泰姆
Step-Down Converters Requiring High Efficiency and 2A Output Currentho7嘉泰姆

四.下载产品资料PDF文档 ho7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！ho7嘉泰姆

QQ截图20160419174301.jpg ho7嘉泰姆

五,产品封装图 (Package)ho7嘉泰姆

ho7嘉泰姆
六.电路原理图ho7嘉泰姆
ho7嘉泰姆
ho7嘉泰姆

七,功能概述ho7嘉泰姆

Inductor Value Calculationho7嘉泰姆
The operating frequency and inductor selection are interrelated in that higher operating frequencies permit the use of a smaller inductor for the same amount of inductorripple current. However, this is at the expense of efficiencyho7嘉泰姆
due to an increase in MOSFET gate charge losses. The equation (2) shows that the inductance value has a directho7嘉泰姆
effect on ripple current.Accepting larger values of ripple current allows the use of low inductances but results inho7嘉泰姆
higher output voltage ripple and greater core losses. A reasonable starting point for setting ripple current isho7嘉泰姆
∆I ≤ 0.4. IOUT(MAX). Remember, the maximum ripple current occurs at the maximum input voltage. ho7嘉泰姆
Output Diode Selectionho7嘉泰姆
The Schottky diode carries load current during the offtime. Therefore, the average diode current is dependentho7嘉泰姆
on the P-channel power MOSFET duty cycle. At high input voltages, the diode conducts most of the time. As VIN ap-proaches VOUT, the diode conducts only a small fraction of the time. The most stressful condition for the diode is when the output is short-circuited. Therefore, it is important to adequately specify the diode peak current and av-ho7嘉泰姆
erage power dissipation so as not to exceed the diode ratings.ho7嘉泰姆
In high power switching regulator, a correct layout is important to ensure proper operation of the regulator. Inho7嘉泰姆
general, interconnecting impedance should be minimized by using short and wide printed circuit traces. Signal andho7嘉泰姆
power grounds are to be kept separating and finally c om bined using ground plane construction orho7嘉泰姆
single point grounding. Figure 2 illustrates the layout,with bold lines indicating high current paths. Components along the bold lines should be placed close together.ho7嘉泰姆
Below is a checklist for your layout:ho7嘉泰姆
pedances should be minimized by using wide and short printed circuit traces.ho7嘉泰姆
3. Keep the sensitive small signal nodes (FB, COMP)away from switching nodes (LX or others) on the PCB.ho7嘉泰姆
Therefore, place the feedback divider and the feedback compensation network close to the IC to avoid switch-ho7嘉泰姆
ing noise. Connect the ground of feedback divider directly to the GND pin of the IC using a dedicatedho7嘉泰姆
ground trace.ho7嘉泰姆
4. The VCC decoupling capacitor should be right next to the VCC and GND pins. Capacitor C2 should beho7嘉泰姆
connected as close to the VIN and UGND pins as possible.ho7嘉泰姆
5. Place the decoupling ceramic capacitor C1 near the VIN as close as possible. The bulk capacitors C8 areho7嘉泰姆
also placed near VIN. Use a wide power ground plane to connect the C1, C8, C4, and Schottky diode to pro-ho7嘉泰姆
vide a low impedance path between the components for large and high slew rate current.ho7嘉泰姆
八,相关产品 更多同类产品.......ho7嘉泰姆

Switching Regulator > Buck Converterho7嘉泰姆
Part_No ho7嘉泰姆	Packageho7嘉泰姆	Architectuho7嘉泰姆	No.ofho7嘉泰姆 PWM ho7嘉泰姆 Outpuho7嘉泰姆	Driveho7嘉泰姆 Loutho7嘉泰姆 (A) ho7嘉泰姆	Vin(V) ho7嘉泰姆		Fmaxho7嘉泰姆 Khz ho7嘉泰姆	Vref ho7嘉泰姆 (V) ho7嘉泰姆	R-Top (milohm) ho7嘉泰姆	R-Sync (milohm) ho7嘉泰姆	Iq (No load) (uA) ho7嘉泰姆
Part_No ho7嘉泰姆	Packageho7嘉泰姆	Architectuho7嘉泰姆	No.ofho7嘉泰姆 PWM ho7嘉泰姆 Outpuho7嘉泰姆	Driveho7嘉泰姆 Loutho7嘉泰姆 (A) ho7嘉泰姆	minho7嘉泰姆	maxho7嘉泰姆	Fmaxho7嘉泰姆 Khz ho7嘉泰姆	Vref ho7嘉泰姆 (V) ho7嘉泰姆	R-Top (milohm) ho7嘉泰姆	R-Sync (milohm) ho7嘉泰姆	Iq (No load) (uA) ho7嘉泰姆
CXSD62122ho7嘉泰姆	TQFN5x6-28ho7嘉泰姆	CMho7嘉泰姆	1ho7嘉泰姆	5ho7嘉泰姆	4.5ho7嘉泰姆	26ho7嘉泰姆	380ho7嘉泰姆	0.8ho7嘉泰姆	50ho7嘉泰姆	20ho7嘉泰姆	1000ho7嘉泰姆
CXSD62123ho7嘉泰姆	SOP-8ho7嘉泰姆	CMho7嘉泰姆	1ho7嘉泰姆	2ho7嘉泰姆	4.5ho7嘉泰姆	26ho7嘉泰姆	380ho7嘉泰姆	0.8ho7嘉泰姆	100ho7嘉泰姆		1000ho7嘉泰姆
CXSD62124ho7嘉泰姆	SOP-8Pho7嘉泰姆	CMho7嘉泰姆	1ho7嘉泰姆	4ho7嘉泰姆	4.5ho7嘉泰姆	26ho7嘉泰姆	380ho7嘉泰姆	0.8ho7嘉泰姆	80ho7嘉泰姆		1000ho7嘉泰姆
CXSD62125ho7嘉泰姆	SOT23-5\|TSOT23-5ho7嘉泰姆	CMho7嘉泰姆	1ho7嘉泰姆	1ho7嘉泰姆	2.7ho7嘉泰姆	6ho7嘉泰姆	1500ho7嘉泰姆	0.6ho7嘉泰姆	280ho7嘉泰姆	250ho7嘉泰姆	25ho7嘉泰姆
CXSD62125Aho7嘉泰姆	SOT23-5ho7嘉泰姆	CMho7嘉泰姆	1ho7嘉泰姆	1ho7嘉泰姆	2.7ho7嘉泰姆	6ho7嘉泰姆	1500ho7嘉泰姆	0.6ho7嘉泰姆	280ho7嘉泰姆	250ho7嘉泰姆
CXSD62126ho7嘉泰姆	SOP-8ho7嘉泰姆	CMho7嘉泰姆	1ho7嘉泰姆	3ho7嘉泰姆	4.3ho7嘉泰姆	14ho7嘉泰姆	500ho7嘉泰姆	0.8ho7嘉泰姆	70ho7嘉泰姆	70ho7嘉泰姆	500ho7嘉泰姆
CXSD62127ho7嘉泰姆	SOP-8Pho7嘉泰姆	CMho7嘉泰姆	1ho7嘉泰姆	3ho7嘉泰姆	4.3ho7嘉泰姆	14ho7嘉泰姆	500ho7嘉泰姆	0.8ho7嘉泰姆	55ho7嘉泰姆	45ho7嘉泰姆	500ho7嘉泰姆
CXSD62128Bho7嘉泰姆	TDFN3x3-10ho7嘉泰姆			3ho7嘉泰姆	2.6ho7嘉泰姆	5.5ho7嘉泰姆	2000ho7嘉泰姆	0.8ho7嘉泰姆	110ho7嘉泰姆	110ho7嘉泰姆	460ho7嘉泰姆
CXSD62129ho7嘉泰姆	TDFN3x3-10ho7嘉泰姆	CMho7嘉泰姆	2ho7嘉泰姆	1ho7嘉泰姆	2.7ho7嘉泰姆	6ho7嘉泰姆	1500ho7嘉泰姆	0.6ho7嘉泰姆	280ho7嘉泰姆	250ho7嘉泰姆	500ho7嘉泰姆
CXSD62129Aho7嘉泰姆	TDFN3x3-10ho7嘉泰姆	CMho7嘉泰姆	2ho7嘉泰姆	1ho7嘉泰姆	2.7ho7嘉泰姆	6ho7嘉泰姆	1500ho7嘉泰姆	0.6ho7嘉泰姆	280ho7嘉泰姆	250ho7嘉泰姆
CXSD62130ho7嘉泰姆	TDFN2x2-6ho7嘉泰姆	CMho7嘉泰姆	1ho7嘉泰姆	1ho7嘉泰姆	2.7ho7嘉泰姆	6ho7嘉泰姆	1500ho7嘉泰姆	0.6ho7嘉泰姆	280ho7嘉泰姆	250ho7嘉泰姆	25ho7嘉泰姆
CXSD62130Aho7嘉泰姆	TDFN2x2-6ho7嘉泰姆	CMho7嘉泰姆	1ho7嘉泰姆	1ho7嘉泰姆	2.7ho7嘉泰姆	6ho7嘉泰姆	1500ho7嘉泰姆	0.6ho7嘉泰姆	280ho7嘉泰姆	250ho7嘉泰姆
CXSD62131ho7嘉泰姆	TDFN3x3-12ho7嘉泰姆	CMho7嘉泰姆	2ho7嘉泰姆	1ho7嘉泰姆	2.7ho7嘉泰姆	6ho7嘉泰姆	1500ho7嘉泰姆	0.6ho7嘉泰姆	280ho7嘉泰姆	250ho7嘉泰姆	25ho7嘉泰姆
CXSD62131Aho7嘉泰姆	TDFN3x3-12ho7嘉泰姆	CMho7嘉泰姆	2ho7嘉泰姆	1ho7嘉泰姆	2.7ho7嘉泰姆	6ho7嘉泰姆	1500ho7嘉泰姆	0.6ho7嘉泰姆	280ho7嘉泰姆	250ho7嘉泰姆
CXSD62131Cho7嘉泰姆	TDFN 3x3 12ho7嘉泰姆	CMho7嘉泰姆	2ho7嘉泰姆	1ho7嘉泰姆	3ho7嘉泰姆	5.5ho7嘉泰姆	1500ho7嘉泰姆	0.6ho7嘉泰姆	280ho7嘉泰姆	250ho7嘉泰姆	30ho7嘉泰姆
CXSD62132ho7嘉泰姆	TQFN3x3-20ho7嘉泰姆	CMho7嘉泰姆	3ho7嘉泰姆	2ho7嘉泰姆	2.9ho7嘉泰姆	5.5ho7嘉泰姆	1500ho7嘉泰姆	0.6ho7嘉泰姆	-ho7嘉泰姆	-ho7嘉泰姆	300ho7嘉泰姆
CXSD62133ho7嘉泰姆	TDFN2x2-8ho7嘉泰姆	CMho7嘉泰姆	1ho7嘉泰姆	1ho7嘉泰姆	3.3ho7嘉泰姆	8ho7嘉泰姆	1500ho7嘉泰姆	0.6ho7嘉泰姆	280ho7嘉泰姆	250ho7嘉泰姆	25ho7嘉泰姆
CXSD62134ho7嘉泰姆	SOP-8ho7嘉泰姆	CMho7嘉泰姆	1ho7嘉泰姆	2ho7嘉泰姆	4.5ho7嘉泰姆	24ho7嘉泰姆	340ho7嘉泰姆	0.925ho7嘉泰姆	110ho7嘉泰姆	110ho7嘉泰姆	1900ho7嘉泰姆
CXSD62135ho7嘉泰姆	SOP-8Pho7嘉泰姆	CMho7嘉泰姆	1ho7嘉泰姆	3ho7嘉泰姆	4.5ho7嘉泰姆	24ho7嘉泰姆	340ho7嘉泰姆	0.925ho7嘉泰姆	110ho7嘉泰姆	110ho7嘉泰姆	1900ho7嘉泰姆

上一篇：5A同步降压转换器CXSD62122 50mΩ P沟道功率MOSFET和20mΩ N沟道功率MOSFET电流模式控制方案

下一篇：4A26V380kHz异步降压转换器CXSD62124 80mW P沟道MOSFET 输出电流调节自动PSM/PWM模式操作中的输出电压

发表评论

产品中心

电源管理

LED驱动电路

音频放大IC

电机风扇驱动芯片

MCU存储ADC时钟数据线

功率器件

隔离芯片

电池充电芯片

技术支持

产品方案

质量承诺

联系我们