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：73

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j4v嘉泰姆

1.产品概述         2.产品特点j4v嘉泰姆
3.应用范围       4.下载产品资料PDF文档 j4v嘉泰姆
5.产品封装图                     6.电路原理图             j4v嘉泰姆
7.功能概述       8.相关产品j4v嘉泰姆

一,产品概述(General Description) j4v嘉泰姆
The CXSD62123 is a 2A, asynchronous, step-down con-verter with integratedj4v嘉泰姆
100mΩ P-channel MOSFET. The device, with current-mode control scheme, canj4v嘉泰姆
convert 4.5~26V input voltage to the output voltage adjustable from 0.8 to 90%j4v嘉泰姆

VIN to provide excellent output voltage regulation.j4v嘉泰姆
The CXSD62123 regulates the output voltage in automatic PSM/PWM modej4v嘉泰姆
operation, depending on the output current, for high efficiency operation over lightj4v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) j4v嘉泰姆

into a single package.In shutdown mode, the supply current drops below 5μA.j4v嘉泰姆

This device, available in a 8-pin SOP-8 package, pro-vides a very compact j4v嘉泰姆

system solution with minimal exter-nal components.j4v嘉泰姆
二.产品特点(Features)j4v嘉泰姆
Wide Input Voltage from 4.5V to 26Vj4v嘉泰姆
Output Current up to 2Aj4v嘉泰姆
Adjustable Output Voltage from 0.8V to 90%VINj4v嘉泰姆
- 0.8V Reference Voltagej4v嘉泰姆
- ±2.5% System Accuracyj4v嘉泰姆
100mΩ Integrated P-Channel Power MOSFETj4v嘉泰姆
High Efficiency up to 91%j4v嘉泰姆
- Pulse-Skipping Mode (PSM) / PWM Mode Op-erationj4v嘉泰姆
Current-Mode Operationj4v嘉泰姆
- Stable with Ceramic Output Capacitorsj4v嘉泰姆
- Fast Transient Responsej4v嘉泰姆
Power-On-Reset Monitoringj4v嘉泰姆
Fixed 380kHz Switching Frequency in PWM Modej4v嘉泰姆
Built-in Digital Soft-Startj4v嘉泰姆
Output Current-Limit Protection with Frequency Foldbackj4v嘉泰姆
70% Under-Voltage Protectionj4v嘉泰姆
Over-Temperature Protectionj4v嘉泰姆
<5μA Quiescent Current During Shutdown SOP-8 Packagej4v嘉泰姆
Lead Free and Green Devices Available (RoHS Compliant)j4v嘉泰姆
三,应用范围 (Applications)j4v嘉泰姆
LCD Monitor / TVj4v嘉泰姆
Set-Top Boxj4v嘉泰姆
Portable DVDj4v嘉泰姆
Wireless LANj4v嘉泰姆
ADSL, Switch HUBj4v嘉泰姆
Notebook Computerj4v嘉泰姆
Step-Down Converters Requiring High Efficiency and 2A Output Currentj4v嘉泰姆

四.下载产品资料PDF文档 j4v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！j4v嘉泰姆

QQ截图20160419174301.jpg j4v嘉泰姆

五,产品封装图 (Package)j4v嘉泰姆

j4v嘉泰姆
六.电路原理图j4v嘉泰姆
j4v嘉泰姆
j4v嘉泰姆

七,功能概述j4v嘉泰姆

Inductor Value Calculationj4v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 efficiencyj4v嘉泰姆
due to an increase in MOSFET gate charge losses. The equation (2) shows that the inductance value has a directj4v嘉泰姆
effect on ripple current.Accepting larger values of ripple current allows the use of low inductances but results inj4v嘉泰姆
higher output voltage ripple and greater core losses. A reasonable starting point for setting ripple current isj4v嘉泰姆
∆I ≤ 0.4. IOUT(MAX). Remember, the maximum ripple current occurs at the maximum input voltage. j4v嘉泰姆
Output Diode Selectionj4v嘉泰姆
The Schottky diode carries load current during the offtime. Therefore, the average diode current is dependentj4v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-j4v嘉泰姆
erage power dissipation so as not to exceed the diode ratings.j4v嘉泰姆
In high power switching regulator, a correct layout is important to ensure proper operation of the regulator. Inj4v嘉泰姆
general, interconnecting impedance should be minimized by using short and wide printed circuit traces. Signal andj4v嘉泰姆
power grounds are to be kept separating and finally c om bined using ground plane construction orj4v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.j4v嘉泰姆
Below is a checklist for your layout:j4v嘉泰姆
pedances should be minimized by using wide and short printed circuit traces.j4v嘉泰姆
3. Keep the sensitive small signal nodes (FB, COMP)away from switching nodes (LX or others) on the PCB.j4v嘉泰姆
Therefore, place the feedback divider and the feedback compensation network close to the IC to avoid switch-j4v嘉泰姆
ing noise. Connect the ground of feedback divider directly to the GND pin of the IC using a dedicatedj4v嘉泰姆
ground trace.j4v嘉泰姆
4. The VCC decoupling capacitor should be right next to the VCC and GND pins. Capacitor C2 should bej4v嘉泰姆
connected as close to the VIN and UGND pins as possible.j4v嘉泰姆
5. Place the decoupling ceramic capacitor C1 near the VIN as close as possible. The bulk capacitors C8 arej4v嘉泰姆
also placed near VIN. Use a wide power ground plane to connect the C1, C8, C4, and Schottky diode to pro-j4v嘉泰姆
vide a low impedance path between the components for large and high slew rate current.j4v嘉泰姆
八,相关产品 更多同类产品.......j4v嘉泰姆

Switching Regulator > Buck Converterj4v嘉泰姆
Part_No j4v嘉泰姆	Packagej4v嘉泰姆	Architectuj4v嘉泰姆	No.ofj4v嘉泰姆 PWM j4v嘉泰姆 Outpuj4v嘉泰姆	Drivej4v嘉泰姆 Loutj4v嘉泰姆 (A) j4v嘉泰姆	Vin(V) j4v嘉泰姆		Fmaxj4v嘉泰姆 Khz j4v嘉泰姆	Vref j4v嘉泰姆 (V) j4v嘉泰姆	R-Top (milohm) j4v嘉泰姆	R-Sync (milohm) j4v嘉泰姆	Iq (No load) (uA) j4v嘉泰姆
Part_No j4v嘉泰姆	Packagej4v嘉泰姆	Architectuj4v嘉泰姆	No.ofj4v嘉泰姆 PWM j4v嘉泰姆 Outpuj4v嘉泰姆	Drivej4v嘉泰姆 Loutj4v嘉泰姆 (A) j4v嘉泰姆	minj4v嘉泰姆	maxj4v嘉泰姆	Fmaxj4v嘉泰姆 Khz j4v嘉泰姆	Vref j4v嘉泰姆 (V) j4v嘉泰姆	R-Top (milohm) j4v嘉泰姆	R-Sync (milohm) j4v嘉泰姆	Iq (No load) (uA) j4v嘉泰姆
CXSD62122j4v嘉泰姆	TQFN5x6-28j4v嘉泰姆	CMj4v嘉泰姆	1j4v嘉泰姆	5j4v嘉泰姆	4.5j4v嘉泰姆	26j4v嘉泰姆	380j4v嘉泰姆	0.8j4v嘉泰姆	50j4v嘉泰姆	20j4v嘉泰姆	1000j4v嘉泰姆
CXSD62123j4v嘉泰姆	SOP-8j4v嘉泰姆	CMj4v嘉泰姆	1j4v嘉泰姆	2j4v嘉泰姆	4.5j4v嘉泰姆	26j4v嘉泰姆	380j4v嘉泰姆	0.8j4v嘉泰姆	100j4v嘉泰姆		1000j4v嘉泰姆
CXSD62124j4v嘉泰姆	SOP-8Pj4v嘉泰姆	CMj4v嘉泰姆	1j4v嘉泰姆	4j4v嘉泰姆	4.5j4v嘉泰姆	26j4v嘉泰姆	380j4v嘉泰姆	0.8j4v嘉泰姆	80j4v嘉泰姆		1000j4v嘉泰姆
CXSD62125j4v嘉泰姆	SOT23-5\|TSOT23-5j4v嘉泰姆	CMj4v嘉泰姆	1j4v嘉泰姆	1j4v嘉泰姆	2.7j4v嘉泰姆	6j4v嘉泰姆	1500j4v嘉泰姆	0.6j4v嘉泰姆	280j4v嘉泰姆	250j4v嘉泰姆	25j4v嘉泰姆
CXSD62125Aj4v嘉泰姆	SOT23-5j4v嘉泰姆	CMj4v嘉泰姆	1j4v嘉泰姆	1j4v嘉泰姆	2.7j4v嘉泰姆	6j4v嘉泰姆	1500j4v嘉泰姆	0.6j4v嘉泰姆	280j4v嘉泰姆	250j4v嘉泰姆
CXSD62126j4v嘉泰姆	SOP-8j4v嘉泰姆	CMj4v嘉泰姆	1j4v嘉泰姆	3j4v嘉泰姆	4.3j4v嘉泰姆	14j4v嘉泰姆	500j4v嘉泰姆	0.8j4v嘉泰姆	70j4v嘉泰姆	70j4v嘉泰姆	500j4v嘉泰姆
CXSD62127j4v嘉泰姆	SOP-8Pj4v嘉泰姆	CMj4v嘉泰姆	1j4v嘉泰姆	3j4v嘉泰姆	4.3j4v嘉泰姆	14j4v嘉泰姆	500j4v嘉泰姆	0.8j4v嘉泰姆	55j4v嘉泰姆	45j4v嘉泰姆	500j4v嘉泰姆
CXSD62128Bj4v嘉泰姆	TDFN3x3-10j4v嘉泰姆			3j4v嘉泰姆	2.6j4v嘉泰姆	5.5j4v嘉泰姆	2000j4v嘉泰姆	0.8j4v嘉泰姆	110j4v嘉泰姆	110j4v嘉泰姆	460j4v嘉泰姆
CXSD62129j4v嘉泰姆	TDFN3x3-10j4v嘉泰姆	CMj4v嘉泰姆	2j4v嘉泰姆	1j4v嘉泰姆	2.7j4v嘉泰姆	6j4v嘉泰姆	1500j4v嘉泰姆	0.6j4v嘉泰姆	280j4v嘉泰姆	250j4v嘉泰姆	500j4v嘉泰姆
CXSD62129Aj4v嘉泰姆	TDFN3x3-10j4v嘉泰姆	CMj4v嘉泰姆	2j4v嘉泰姆	1j4v嘉泰姆	2.7j4v嘉泰姆	6j4v嘉泰姆	1500j4v嘉泰姆	0.6j4v嘉泰姆	280j4v嘉泰姆	250j4v嘉泰姆
CXSD62130j4v嘉泰姆	TDFN2x2-6j4v嘉泰姆	CMj4v嘉泰姆	1j4v嘉泰姆	1j4v嘉泰姆	2.7j4v嘉泰姆	6j4v嘉泰姆	1500j4v嘉泰姆	0.6j4v嘉泰姆	280j4v嘉泰姆	250j4v嘉泰姆	25j4v嘉泰姆
CXSD62130Aj4v嘉泰姆	TDFN2x2-6j4v嘉泰姆	CMj4v嘉泰姆	1j4v嘉泰姆	1j4v嘉泰姆	2.7j4v嘉泰姆	6j4v嘉泰姆	1500j4v嘉泰姆	0.6j4v嘉泰姆	280j4v嘉泰姆	250j4v嘉泰姆
CXSD62131j4v嘉泰姆	TDFN3x3-12j4v嘉泰姆	CMj4v嘉泰姆	2j4v嘉泰姆	1j4v嘉泰姆	2.7j4v嘉泰姆	6j4v嘉泰姆	1500j4v嘉泰姆	0.6j4v嘉泰姆	280j4v嘉泰姆	250j4v嘉泰姆	25j4v嘉泰姆
CXSD62131Aj4v嘉泰姆	TDFN3x3-12j4v嘉泰姆	CMj4v嘉泰姆	2j4v嘉泰姆	1j4v嘉泰姆	2.7j4v嘉泰姆	6j4v嘉泰姆	1500j4v嘉泰姆	0.6j4v嘉泰姆	280j4v嘉泰姆	250j4v嘉泰姆
CXSD62131Cj4v嘉泰姆	TDFN 3x3 12j4v嘉泰姆	CMj4v嘉泰姆	2j4v嘉泰姆	1j4v嘉泰姆	3j4v嘉泰姆	5.5j4v嘉泰姆	1500j4v嘉泰姆	0.6j4v嘉泰姆	280j4v嘉泰姆	250j4v嘉泰姆	30j4v嘉泰姆
CXSD62132j4v嘉泰姆	TQFN3x3-20j4v嘉泰姆	CMj4v嘉泰姆	3j4v嘉泰姆	2j4v嘉泰姆	2.9j4v嘉泰姆	5.5j4v嘉泰姆	1500j4v嘉泰姆	0.6j4v嘉泰姆	-j4v嘉泰姆	-j4v嘉泰姆	300j4v嘉泰姆
CXSD62133j4v嘉泰姆	TDFN2x2-8j4v嘉泰姆	CMj4v嘉泰姆	1j4v嘉泰姆	1j4v嘉泰姆	3.3j4v嘉泰姆	8j4v嘉泰姆	1500j4v嘉泰姆	0.6j4v嘉泰姆	280j4v嘉泰姆	250j4v嘉泰姆	25j4v嘉泰姆
CXSD62134j4v嘉泰姆	SOP-8j4v嘉泰姆	CMj4v嘉泰姆	1j4v嘉泰姆	2j4v嘉泰姆	4.5j4v嘉泰姆	24j4v嘉泰姆	340j4v嘉泰姆	0.925j4v嘉泰姆	110j4v嘉泰姆	110j4v嘉泰姆	1900j4v嘉泰姆
CXSD62135j4v嘉泰姆	SOP-8Pj4v嘉泰姆	CMj4v嘉泰姆	1j4v嘉泰姆	3j4v嘉泰姆	4.5j4v嘉泰姆	24j4v嘉泰姆	340j4v嘉泰姆	0.925j4v嘉泰姆	110j4v嘉泰姆	110j4v嘉泰姆	1900j4v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