CXSD61036 high efficiency synchronous PWM step-down DC converters working under an input voltage range of 2.5V to 5.5V

This feature makes the CXSD61036 suitable
for single Li-lon battery-powered applications.100% duty cycle
capability extends battery life in portable devices, while the quiescent
current is 200 A with no load, and drops to < 1 A in shutdown

目录

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

 

一,产品概述(General Description)   

---

    The CXSD61036 is high efficiency synchronous,PWM step-down
DC/DC converters working under an input voltage
range of 2.5V to 5.5V. This feature makes the CXSD61036 suitable
for single Li-lon battery-powered applications.100% duty cycle
capability extends battery life in portable devices, while the quiescent
current is 200 A with no load, and drops to < 1 A in shutdown.
       The internal synchronous switch is  desired to increase efficiency
without an external Schottky diode. The 1.4 MHz fixed switching
frequency allows the using of tiny,low profile inductors and ceramic
capacitors,which minimized overall solution footprint
        The CXSD61036 converters are available in the industry standard
SOT-23-5 power packages (or upon request)
二.产品特点(Features)

---

1.)Up to 95% Efficiency
2.)Current mode operation for excellent line and load
     transient response
3)Low quiescent current: 230 UA
4)Low Switch on Resistance RDS(ON),Internal Switch: 0.35
5)Output voltage 5.5V 0.6V
6)Automatic PWM/PFM mode switching
7)No Schottky diode required
8)1.4MHz fixed frequency switching
9)Short-Circuit protection
10)Shutdown quiescent current: < 1 UA
11)Low profile SOT-23-5 package (lead-free
12)packaging is now available)
三,应用范围 (Applications)
Digital cameras and MP3
Palmtop computers / PDAs
Cellular phones
Wireless handsets and DSL modems
PC cards
Portable media players
四.下载产品资料PDF文档

---

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！

 

五,产品封装图 (Package)

---

PIN NUMBER SOT-23- 5	PIN NAME	FUNCTION
1	EN	ON/OFF Control (High Enable)
2	GND	Ground
3	SW	Switch Output
4	VIN	Input
5	VFB	Output

六.电路原理图

---

七,功能概述

---

INDUCTOR SELECTION

For most applications, the value of the inductor will fall in the range of 1μH to 4.7μH. Its value is
chosen based on the desired ripple current. Large value inductors lower ripple current and small
value inductors result in higher ripple currents. Higher VIN or VOUT also increases the ripple

current as shown in equation 1. A reasonable starting point for setting ripple current is
IL =240mA (40% of 600mA).
The DC current rating of the inductor should be at least equal to the maximum load current plus
half the ripple current to prevent core saturation. Thus, a 720mA rated inductor should be
enough for most applications (600mA + 120mA). For better efficiency, choose a low DC-resistance
inductor.
Different core materials and shapes will change the size/current and price/current relationship of
an inductor. Toroid or shielded pot cores in ferrite or permalloy materials are small and don’t
radiate much energy, but generally cost more than powdered iron core inductors with similar
electrical characteristics. The choice of which style inductor to use often depends more on the

price vs size requirements and any radiated field/EMI requirements than on what the CXSD61036

requires to operate. Table 1 shows some typical surface mount inductors that work well in
八,相关产品                 更多同类产品.......

---

低压同步DC-DC降压IC
型号	输入耐压	输出电压	输出电流	反馈电压	工作频率	效率	静态工作电流	待机电流	封装
CXSD61036	2.0-6.0V	1.2V/1.8V/3.3V/可调输出	0.7A	0.6V	1.5MHz	96%	20uA		SOT-25
CXSD61037	2.5-6.0V	可调输出	1A	0.6V	1.5MHz	96%	20uA		SOT-25
CXSD61038	2.0-6.0V	可调输出	1.0A	0.6V	1.5M	96%	20uA	1uA	SOT-25
CXSD61038A	2.3-6.0V	可调输出	1.2A	0.6V	1.5M	96%	35uA	1uA	SOT-25
CXSD61038B	2.3-6.0V	可调输出	1.5A	0.6V	1.5M	96%	35uA	1uA	SOT-25
CXSD61039	2.3-6.0V	可调输出	1.5A	0.6V	1.5M	96%	35uA	1uA	SOT-25
CXSD61040	2.0-6.5V	可调输出	2.0A	0.6V	1.5M	96%	40uA	1uA	SOT-26
CXSD61040B	2.6-6.0V	可调输出	2.0A	0.6V	3M	96%	30uA	0.1uA	SOT-25
CXSD61042S	2.3-6.5V	可调输出	2.0A	0.6V	1.5M	96%	40uA	40uA	SOP-8
CXSD61043S	2.3-6.5V	可调输出	3.0A	0.6V	1.5M	95%	40uA	40uA	ESOP-8
CXSD61044D	2.3V-6.5V	可调输出	1.3A	0.6V	1.5M	96%	35uA	35uA	DFN2*2-6
CXSD61040D	2.3V-6.5V	可调输出	2A	0.6V	1.5M	95%	40uA	40uA	DFN3*3-10
CXSD61043	2.5-6.0V	可调输出	3.0A	0.6V	1MHz	95%	40uA	0.1uA	SOT-25