SD3323H是一颗三功能手电筒LED驱动芯片，采用了极小的SOT23无铅封装形式，仅需一颗电容器件，既节省PCB空间，又节省系统的成本，三节干电池或一节锂电池可以驱动1-10W的LED。SD3323H通过开关断开再接通来变换输出模式，可以实现亮度调节和暴闪功能。

特性:
v* 全 亮 、25% 亮 、 暴闪三种功能循环模式
v*工作 电 压 ：2.5V~5V
v* 工作效率高达 92%
v* 100mΩ低导通电阻
v* 高达 2.5A 的驱动电流能 力
v*内置 NMOS可直接驱动1~10W LED
v* SOT23绿色封装
v*内置防电源反接功能
应用范围:
v* 移动手电筒
v* LED 头灯
v* LED 驱动

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 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