SX1013芯片采用专利的高端电流检测、固定
频率、电流模PWM控制方式，具有优异
的线性调整率和负载调整率。当采用无输出电容的方案时，应选择
稍大的电感值，以使得电感电流工作在连
续模式，减小LED上的电流纹波。当LED
两端并联有输出电容时，系统既可以工作
在连续模式也可以工作在非连续模式
SX1013芯片内置频率补偿与斜坡补偿，无需
外部补偿。SX1013芯片在TOFF期间通过启动电阻或者
辅助供电电阻对芯片供电。应合理选择供
电电阻的取值，保证供电电流大于芯片工
作电流，同时供电电流也不宜过大，否则
会超过芯片电源引脚的箝位能力并可能导
致芯片过热。SX1013还集成了抖频功能，
以改善系统的EMI特性。
内部集成了多重保护功能，
包括LED短路保护，逐周期限流保护，输
入供电欠压保护及电源箝位等功能。
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
