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

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发表时间：2020-04-24浏览次数：166

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WyF嘉泰姆

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

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

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

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

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

system solution with minimal exter-nal components.WyF嘉泰姆
二.产品特点(Features)WyF嘉泰姆
Wide Input Voltage from 4.5V to 26VWyF嘉泰姆
Output Current up to 2AWyF嘉泰姆
Adjustable Output Voltage from 0.8V to 90%VINWyF嘉泰姆
- 0.8V Reference VoltageWyF嘉泰姆
- ±2.5% System AccuracyWyF嘉泰姆
100mΩ Integrated P-Channel Power MOSFETWyF嘉泰姆
High Efficiency up to 91%WyF嘉泰姆
- Pulse-Skipping Mode (PSM) / PWM Mode Op-erationWyF嘉泰姆
Current-Mode OperationWyF嘉泰姆
- Stable with Ceramic Output CapacitorsWyF嘉泰姆
- Fast Transient ResponseWyF嘉泰姆
Power-On-Reset MonitoringWyF嘉泰姆
Fixed 380kHz Switching Frequency in PWM ModeWyF嘉泰姆
Built-in Digital Soft-StartWyF嘉泰姆
Output Current-Limit Protection with Frequency FoldbackWyF嘉泰姆
70% Under-Voltage ProtectionWyF嘉泰姆
Over-Temperature ProtectionWyF嘉泰姆
<5μA Quiescent Current During Shutdown SOP-8 PackageWyF嘉泰姆
Lead Free and Green Devices Available (RoHS Compliant)WyF嘉泰姆
三,应用范围 (Applications)WyF嘉泰姆
LCD Monitor / TVWyF嘉泰姆
Set-Top BoxWyF嘉泰姆
Portable DVDWyF嘉泰姆
Wireless LANWyF嘉泰姆
ADSL, Switch HUBWyF嘉泰姆
Notebook ComputerWyF嘉泰姆
Step-Down Converters Requiring High Efficiency and 2A Output CurrentWyF嘉泰姆

四.下载产品资料PDF文档 WyF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！WyF嘉泰姆

QQ截图20160419174301.jpg WyF嘉泰姆

五,产品封装图 (Package)WyF嘉泰姆

WyF嘉泰姆
六.电路原理图WyF嘉泰姆
WyF嘉泰姆
WyF嘉泰姆

七,功能概述WyF嘉泰姆

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

Switching Regulator > Buck ConverterWyF嘉泰姆
Part_No WyF嘉泰姆	PackageWyF嘉泰姆	ArchitectuWyF嘉泰姆	No.ofWyF嘉泰姆 PWM WyF嘉泰姆 OutpuWyF嘉泰姆	DriveWyF嘉泰姆 LoutWyF嘉泰姆 (A) WyF嘉泰姆	Vin(V) WyF嘉泰姆		FmaxWyF嘉泰姆 Khz WyF嘉泰姆	Vref WyF嘉泰姆 (V) WyF嘉泰姆	R-Top (milohm) WyF嘉泰姆	R-Sync (milohm) WyF嘉泰姆	Iq (No load) (uA) WyF嘉泰姆
Part_No WyF嘉泰姆	PackageWyF嘉泰姆	ArchitectuWyF嘉泰姆	No.ofWyF嘉泰姆 PWM WyF嘉泰姆 OutpuWyF嘉泰姆	DriveWyF嘉泰姆 LoutWyF嘉泰姆 (A) WyF嘉泰姆	minWyF嘉泰姆	maxWyF嘉泰姆	FmaxWyF嘉泰姆 Khz WyF嘉泰姆	Vref WyF嘉泰姆 (V) WyF嘉泰姆	R-Top (milohm) WyF嘉泰姆	R-Sync (milohm) WyF嘉泰姆	Iq (No load) (uA) WyF嘉泰姆
CXSD62122WyF嘉泰姆	TQFN5x6-28WyF嘉泰姆	CMWyF嘉泰姆	1WyF嘉泰姆	5WyF嘉泰姆	4.5WyF嘉泰姆	26WyF嘉泰姆	380WyF嘉泰姆	0.8WyF嘉泰姆	50WyF嘉泰姆	20WyF嘉泰姆	1000WyF嘉泰姆
CXSD62123WyF嘉泰姆	SOP-8WyF嘉泰姆	CMWyF嘉泰姆	1WyF嘉泰姆	2WyF嘉泰姆	4.5WyF嘉泰姆	26WyF嘉泰姆	380WyF嘉泰姆	0.8WyF嘉泰姆	100WyF嘉泰姆		1000WyF嘉泰姆
CXSD62124WyF嘉泰姆	SOP-8PWyF嘉泰姆	CMWyF嘉泰姆	1WyF嘉泰姆	4WyF嘉泰姆	4.5WyF嘉泰姆	26WyF嘉泰姆	380WyF嘉泰姆	0.8WyF嘉泰姆	80WyF嘉泰姆		1000WyF嘉泰姆
CXSD62125WyF嘉泰姆	SOT23-5\|TSOT23-5WyF嘉泰姆	CMWyF嘉泰姆	1WyF嘉泰姆	1WyF嘉泰姆	2.7WyF嘉泰姆	6WyF嘉泰姆	1500WyF嘉泰姆	0.6WyF嘉泰姆	280WyF嘉泰姆	250WyF嘉泰姆	25WyF嘉泰姆
CXSD62125AWyF嘉泰姆	SOT23-5WyF嘉泰姆	CMWyF嘉泰姆	1WyF嘉泰姆	1WyF嘉泰姆	2.7WyF嘉泰姆	6WyF嘉泰姆	1500WyF嘉泰姆	0.6WyF嘉泰姆	280WyF嘉泰姆	250WyF嘉泰姆
CXSD62126WyF嘉泰姆	SOP-8WyF嘉泰姆	CMWyF嘉泰姆	1WyF嘉泰姆	3WyF嘉泰姆	4.3WyF嘉泰姆	14WyF嘉泰姆	500WyF嘉泰姆	0.8WyF嘉泰姆	70WyF嘉泰姆	70WyF嘉泰姆	500WyF嘉泰姆
CXSD62127WyF嘉泰姆	SOP-8PWyF嘉泰姆	CMWyF嘉泰姆	1WyF嘉泰姆	3WyF嘉泰姆	4.3WyF嘉泰姆	14WyF嘉泰姆	500WyF嘉泰姆	0.8WyF嘉泰姆	55WyF嘉泰姆	45WyF嘉泰姆	500WyF嘉泰姆
CXSD62128BWyF嘉泰姆	TDFN3x3-10WyF嘉泰姆			3WyF嘉泰姆	2.6WyF嘉泰姆	5.5WyF嘉泰姆	2000WyF嘉泰姆	0.8WyF嘉泰姆	110WyF嘉泰姆	110WyF嘉泰姆	460WyF嘉泰姆
CXSD62129WyF嘉泰姆	TDFN3x3-10WyF嘉泰姆	CMWyF嘉泰姆	2WyF嘉泰姆	1WyF嘉泰姆	2.7WyF嘉泰姆	6WyF嘉泰姆	1500WyF嘉泰姆	0.6WyF嘉泰姆	280WyF嘉泰姆	250WyF嘉泰姆	500WyF嘉泰姆
CXSD62129AWyF嘉泰姆	TDFN3x3-10WyF嘉泰姆	CMWyF嘉泰姆	2WyF嘉泰姆	1WyF嘉泰姆	2.7WyF嘉泰姆	6WyF嘉泰姆	1500WyF嘉泰姆	0.6WyF嘉泰姆	280WyF嘉泰姆	250WyF嘉泰姆
CXSD62130WyF嘉泰姆	TDFN2x2-6WyF嘉泰姆	CMWyF嘉泰姆	1WyF嘉泰姆	1WyF嘉泰姆	2.7WyF嘉泰姆	6WyF嘉泰姆	1500WyF嘉泰姆	0.6WyF嘉泰姆	280WyF嘉泰姆	250WyF嘉泰姆	25WyF嘉泰姆
CXSD62130AWyF嘉泰姆	TDFN2x2-6WyF嘉泰姆	CMWyF嘉泰姆	1WyF嘉泰姆	1WyF嘉泰姆	2.7WyF嘉泰姆	6WyF嘉泰姆	1500WyF嘉泰姆	0.6WyF嘉泰姆	280WyF嘉泰姆	250WyF嘉泰姆
CXSD62131WyF嘉泰姆	TDFN3x3-12WyF嘉泰姆	CMWyF嘉泰姆	2WyF嘉泰姆	1WyF嘉泰姆	2.7WyF嘉泰姆	6WyF嘉泰姆	1500WyF嘉泰姆	0.6WyF嘉泰姆	280WyF嘉泰姆	250WyF嘉泰姆	25WyF嘉泰姆
CXSD62131AWyF嘉泰姆	TDFN3x3-12WyF嘉泰姆	CMWyF嘉泰姆	2WyF嘉泰姆	1WyF嘉泰姆	2.7WyF嘉泰姆	6WyF嘉泰姆	1500WyF嘉泰姆	0.6WyF嘉泰姆	280WyF嘉泰姆	250WyF嘉泰姆
CXSD62131CWyF嘉泰姆	TDFN 3x3 12WyF嘉泰姆	CMWyF嘉泰姆	2WyF嘉泰姆	1WyF嘉泰姆	3WyF嘉泰姆	5.5WyF嘉泰姆	1500WyF嘉泰姆	0.6WyF嘉泰姆	280WyF嘉泰姆	250WyF嘉泰姆	30WyF嘉泰姆
CXSD62132WyF嘉泰姆	TQFN3x3-20WyF嘉泰姆	CMWyF嘉泰姆	3WyF嘉泰姆	2WyF嘉泰姆	2.9WyF嘉泰姆	5.5WyF嘉泰姆	1500WyF嘉泰姆	0.6WyF嘉泰姆	-WyF嘉泰姆	-WyF嘉泰姆	300WyF嘉泰姆
CXSD62133WyF嘉泰姆	TDFN2x2-8WyF嘉泰姆	CMWyF嘉泰姆	1WyF嘉泰姆	1WyF嘉泰姆	3.3WyF嘉泰姆	8WyF嘉泰姆	1500WyF嘉泰姆	0.6WyF嘉泰姆	280WyF嘉泰姆	250WyF嘉泰姆	25WyF嘉泰姆
CXSD62134WyF嘉泰姆	SOP-8WyF嘉泰姆	CMWyF嘉泰姆	1WyF嘉泰姆	2WyF嘉泰姆	4.5WyF嘉泰姆	24WyF嘉泰姆	340WyF嘉泰姆	0.925WyF嘉泰姆	110WyF嘉泰姆	110WyF嘉泰姆	1900WyF嘉泰姆
CXSD62135WyF嘉泰姆	SOP-8PWyF嘉泰姆	CMWyF嘉泰姆	1WyF嘉泰姆	3WyF嘉泰姆	4.5WyF嘉泰姆	24WyF嘉泰姆	340WyF嘉泰姆	0.925WyF嘉泰姆	110WyF嘉泰姆	110WyF嘉泰姆	1900WyF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

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