LY2203系列产品是一种高效率、低纹波、工作频率高的 PFM同步升压 DC-DC 变换器。LY2203系列产品仅需要三个元器,就可完成将低输入的电池电压变换升压到所需的工作电压，非常适合于便携式1～3 节普通电池应用的场合。电路采用了高性能、低功耗的参考电压电路结构，同时在生产中引入修正技术，保证了输出电压的高输出精度及低温度漂移。内置的同步开关管可极大降低开关管上的损耗，使效率可达95%。LY2203工作PFM模式，可有效降低轻载模式下的损耗，提高设备的使用周期。同时，芯片低的静态电流可进一步降低系统损耗。LY2203可提供SOT-23-3, SOT-23-5, SOT-89,TO-92封装形式,SOT23-5封装内置EN使能端，可控制变换器的工作状态，可使它处于关断省电状态，功耗降至
特点
?工作频率:300KHz
?输出电压:2.5V～5.0V（步进 0.1V）
?低静态电流：15uA
?输出精度:优于±2.5%
?效率:95%
?低纹波，低噪声
?封装尺寸：SOT89,SOT23,TO-92。
用途
? MP3、数码相机、蓝牙耳机、摄像机、PDA及手持电话等便携式设备的电源部分；
? LED手电筒、LED灯、遥控玩具；
?汽车防盗器、防丢器；
?无线鼠标键盘、充电器等使用1-3节干电池供电的电子设备的电源部分。
LY73XX
The LY73XX series is a set of three-terminal, low power, high voltage regulators implemented in CMOS ogy. The series features extremely low quiescent cur-technol-rent which is typically 4uμA. They high as 12V. The device provides large current with aallow input voltages as significantly small dropout voltage.
The LY73XX consists of a high-precision voltage refer- ence, an error correction circuit, and a current limnited output driver. They are available with several fixed out-put voltages ranging from 1.8V to 5.0V. CMOS technol-ogy ensures low dropout voltage and low current consumption. Although designed primarily as fixed volt-age regulators, these devices can be used with external components to generate variable voltages and currents.
Features
UItra low quiescent current: 4μA (typ.)
High input voltage (up to 12V)
Output voltage:1.8V, 2.5V, 2.7V, 3.0V, 3.3V, 3.5V, 5.0V
Output voltage accuracy: tolerance +3%
Maximum output current: 250mA
Low dropout voltage
Low temperature coefficient
package：TO-92, SOT-89-3 SOT23-3
Application
Battery-powered equipment
Voltage regulator for microprocessor
Voltage regulator for L AN cards
Wireless Communication equipment
Audio/Video equipment
LY76XX
LY76XX serieslow-dropoutlinear voltage regulators with a built-in voltage reference module, error correction module and phase compensation module. LY76XX series are based on the CMOS process and allow high voltage input with low quiescent current. This series can deliver 100mA output current and allow an input voltage as high as 40V.This series has the function of internal feedback resistor setting from 2.1Vto 12V. The output accuracy is t 2%.
Features
High output accuracy:土2%
Input voltage: up to 40 V
Output voltage: 2.1V ~ 12V
Utralow quiescent current (Typ.=3μA) Output Current: lour= 100mA
(When VIN = 5.5V and Vout =3.3V)Low temperature cofficient
Ceramic capacitor can be used
Package: SOT89-3. T092、SOT23-3
Typical Application
Electronic weighbridge
SCM
Phones, cordless phones
Security Products
Water meters, power meters
LY6118
封装： SOT223 TO252
