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：285

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AoY嘉泰姆

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

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

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

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

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

system solution with minimal exter-nal components.AoY嘉泰姆
二.产品特点(Features)AoY嘉泰姆
Wide Input Voltage from 4.5V to 26VAoY嘉泰姆
Output Current up to 2AAoY嘉泰姆
Adjustable Output Voltage from 0.8V to 90%VINAoY嘉泰姆
- 0.8V Reference VoltageAoY嘉泰姆
- ±2.5% System AccuracyAoY嘉泰姆
100mΩ Integrated P-Channel Power MOSFETAoY嘉泰姆
High Efficiency up to 91%AoY嘉泰姆
- Pulse-Skipping Mode (PSM) / PWM Mode Op-erationAoY嘉泰姆
Current-Mode OperationAoY嘉泰姆
- Stable with Ceramic Output CapacitorsAoY嘉泰姆
- Fast Transient ResponseAoY嘉泰姆
Power-On-Reset MonitoringAoY嘉泰姆
Fixed 380kHz Switching Frequency in PWM ModeAoY嘉泰姆
Built-in Digital Soft-StartAoY嘉泰姆
Output Current-Limit Protection with Frequency FoldbackAoY嘉泰姆
70% Under-Voltage ProtectionAoY嘉泰姆
Over-Temperature ProtectionAoY嘉泰姆
<5μA Quiescent Current During Shutdown SOP-8 PackageAoY嘉泰姆
Lead Free and Green Devices Available (RoHS Compliant)AoY嘉泰姆
三,应用范围 (Applications)AoY嘉泰姆
LCD Monitor / TVAoY嘉泰姆
Set-Top BoxAoY嘉泰姆
Portable DVDAoY嘉泰姆
Wireless LANAoY嘉泰姆
ADSL, Switch HUBAoY嘉泰姆
Notebook ComputerAoY嘉泰姆
Step-Down Converters Requiring High Efficiency and 2A Output CurrentAoY嘉泰姆

四.下载产品资料PDF文档 AoY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！AoY嘉泰姆

QQ截图20160419174301.jpg AoY嘉泰姆

五,产品封装图 (Package)AoY嘉泰姆

AoY嘉泰姆
六.电路原理图AoY嘉泰姆
AoY嘉泰姆
AoY嘉泰姆

七,功能概述AoY嘉泰姆

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

Switching Regulator > Buck ConverterAoY嘉泰姆
Part_No AoY嘉泰姆	PackageAoY嘉泰姆	ArchitectuAoY嘉泰姆	No.ofAoY嘉泰姆 PWM AoY嘉泰姆 OutpuAoY嘉泰姆	DriveAoY嘉泰姆 LoutAoY嘉泰姆 (A) AoY嘉泰姆	Vin(V) AoY嘉泰姆		FmaxAoY嘉泰姆 Khz AoY嘉泰姆	Vref AoY嘉泰姆 (V) AoY嘉泰姆	R-Top (milohm) AoY嘉泰姆	R-Sync (milohm) AoY嘉泰姆	Iq (No load) (uA) AoY嘉泰姆
Part_No AoY嘉泰姆	PackageAoY嘉泰姆	ArchitectuAoY嘉泰姆	No.ofAoY嘉泰姆 PWM AoY嘉泰姆 OutpuAoY嘉泰姆	DriveAoY嘉泰姆 LoutAoY嘉泰姆 (A) AoY嘉泰姆	minAoY嘉泰姆	maxAoY嘉泰姆	FmaxAoY嘉泰姆 Khz AoY嘉泰姆	Vref AoY嘉泰姆 (V) AoY嘉泰姆	R-Top (milohm) AoY嘉泰姆	R-Sync (milohm) AoY嘉泰姆	Iq (No load) (uA) AoY嘉泰姆
CXSD62122AoY嘉泰姆	TQFN5x6-28AoY嘉泰姆	CMAoY嘉泰姆	1AoY嘉泰姆	5AoY嘉泰姆	4.5AoY嘉泰姆	26AoY嘉泰姆	380AoY嘉泰姆	0.8AoY嘉泰姆	50AoY嘉泰姆	20AoY嘉泰姆	1000AoY嘉泰姆
CXSD62123AoY嘉泰姆	SOP-8AoY嘉泰姆	CMAoY嘉泰姆	1AoY嘉泰姆	2AoY嘉泰姆	4.5AoY嘉泰姆	26AoY嘉泰姆	380AoY嘉泰姆	0.8AoY嘉泰姆	100AoY嘉泰姆		1000AoY嘉泰姆
CXSD62124AoY嘉泰姆	SOP-8PAoY嘉泰姆	CMAoY嘉泰姆	1AoY嘉泰姆	4AoY嘉泰姆	4.5AoY嘉泰姆	26AoY嘉泰姆	380AoY嘉泰姆	0.8AoY嘉泰姆	80AoY嘉泰姆		1000AoY嘉泰姆
CXSD62125AoY嘉泰姆	SOT23-5\|TSOT23-5AoY嘉泰姆	CMAoY嘉泰姆	1AoY嘉泰姆	1AoY嘉泰姆	2.7AoY嘉泰姆	6AoY嘉泰姆	1500AoY嘉泰姆	0.6AoY嘉泰姆	280AoY嘉泰姆	250AoY嘉泰姆	25AoY嘉泰姆
CXSD62125AAoY嘉泰姆	SOT23-5AoY嘉泰姆	CMAoY嘉泰姆	1AoY嘉泰姆	1AoY嘉泰姆	2.7AoY嘉泰姆	6AoY嘉泰姆	1500AoY嘉泰姆	0.6AoY嘉泰姆	280AoY嘉泰姆	250AoY嘉泰姆
CXSD62126AoY嘉泰姆	SOP-8AoY嘉泰姆	CMAoY嘉泰姆	1AoY嘉泰姆	3AoY嘉泰姆	4.3AoY嘉泰姆	14AoY嘉泰姆	500AoY嘉泰姆	0.8AoY嘉泰姆	70AoY嘉泰姆	70AoY嘉泰姆	500AoY嘉泰姆
CXSD62127AoY嘉泰姆	SOP-8PAoY嘉泰姆	CMAoY嘉泰姆	1AoY嘉泰姆	3AoY嘉泰姆	4.3AoY嘉泰姆	14AoY嘉泰姆	500AoY嘉泰姆	0.8AoY嘉泰姆	55AoY嘉泰姆	45AoY嘉泰姆	500AoY嘉泰姆
CXSD62128BAoY嘉泰姆	TDFN3x3-10AoY嘉泰姆			3AoY嘉泰姆	2.6AoY嘉泰姆	5.5AoY嘉泰姆	2000AoY嘉泰姆	0.8AoY嘉泰姆	110AoY嘉泰姆	110AoY嘉泰姆	460AoY嘉泰姆
CXSD62129AoY嘉泰姆	TDFN3x3-10AoY嘉泰姆	CMAoY嘉泰姆	2AoY嘉泰姆	1AoY嘉泰姆	2.7AoY嘉泰姆	6AoY嘉泰姆	1500AoY嘉泰姆	0.6AoY嘉泰姆	280AoY嘉泰姆	250AoY嘉泰姆	500AoY嘉泰姆
CXSD62129AAoY嘉泰姆	TDFN3x3-10AoY嘉泰姆	CMAoY嘉泰姆	2AoY嘉泰姆	1AoY嘉泰姆	2.7AoY嘉泰姆	6AoY嘉泰姆	1500AoY嘉泰姆	0.6AoY嘉泰姆	280AoY嘉泰姆	250AoY嘉泰姆
CXSD62130AoY嘉泰姆	TDFN2x2-6AoY嘉泰姆	CMAoY嘉泰姆	1AoY嘉泰姆	1AoY嘉泰姆	2.7AoY嘉泰姆	6AoY嘉泰姆	1500AoY嘉泰姆	0.6AoY嘉泰姆	280AoY嘉泰姆	250AoY嘉泰姆	25AoY嘉泰姆
CXSD62130AAoY嘉泰姆	TDFN2x2-6AoY嘉泰姆	CMAoY嘉泰姆	1AoY嘉泰姆	1AoY嘉泰姆	2.7AoY嘉泰姆	6AoY嘉泰姆	1500AoY嘉泰姆	0.6AoY嘉泰姆	280AoY嘉泰姆	250AoY嘉泰姆
CXSD62131AoY嘉泰姆	TDFN3x3-12AoY嘉泰姆	CMAoY嘉泰姆	2AoY嘉泰姆	1AoY嘉泰姆	2.7AoY嘉泰姆	6AoY嘉泰姆	1500AoY嘉泰姆	0.6AoY嘉泰姆	280AoY嘉泰姆	250AoY嘉泰姆	25AoY嘉泰姆
CXSD62131AAoY嘉泰姆	TDFN3x3-12AoY嘉泰姆	CMAoY嘉泰姆	2AoY嘉泰姆	1AoY嘉泰姆	2.7AoY嘉泰姆	6AoY嘉泰姆	1500AoY嘉泰姆	0.6AoY嘉泰姆	280AoY嘉泰姆	250AoY嘉泰姆
CXSD62131CAoY嘉泰姆	TDFN 3x3 12AoY嘉泰姆	CMAoY嘉泰姆	2AoY嘉泰姆	1AoY嘉泰姆	3AoY嘉泰姆	5.5AoY嘉泰姆	1500AoY嘉泰姆	0.6AoY嘉泰姆	280AoY嘉泰姆	250AoY嘉泰姆	30AoY嘉泰姆
CXSD62132AoY嘉泰姆	TQFN3x3-20AoY嘉泰姆	CMAoY嘉泰姆	3AoY嘉泰姆	2AoY嘉泰姆	2.9AoY嘉泰姆	5.5AoY嘉泰姆	1500AoY嘉泰姆	0.6AoY嘉泰姆	-AoY嘉泰姆	-AoY嘉泰姆	300AoY嘉泰姆
CXSD62133AoY嘉泰姆	TDFN2x2-8AoY嘉泰姆	CMAoY嘉泰姆	1AoY嘉泰姆	1AoY嘉泰姆	3.3AoY嘉泰姆	8AoY嘉泰姆	1500AoY嘉泰姆	0.6AoY嘉泰姆	280AoY嘉泰姆	250AoY嘉泰姆	25AoY嘉泰姆
CXSD62134AoY嘉泰姆	SOP-8AoY嘉泰姆	CMAoY嘉泰姆	1AoY嘉泰姆	2AoY嘉泰姆	4.5AoY嘉泰姆	24AoY嘉泰姆	340AoY嘉泰姆	0.925AoY嘉泰姆	110AoY嘉泰姆	110AoY嘉泰姆	1900AoY嘉泰姆
CXSD62135AoY嘉泰姆	SOP-8PAoY嘉泰姆	CMAoY嘉泰姆	1AoY嘉泰姆	3AoY嘉泰姆	4.5AoY嘉泰姆	24AoY嘉泰姆	340AoY嘉泰姆	0.925AoY嘉泰姆	110AoY嘉泰姆	110AoY嘉泰姆	1900AoY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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