LY4057A是一款完整的单节锂离子电池采用恒定电流/恒定电压线性充电器。其底部带有散热片的SOP8封装与较少的外部元件数目使得LY4057A成为便携式应用的理想选择。LY4057A可以适合USB电源和适配器电源工作。由于采用了内部PMOSFET架构，加上防倒充电路，所以不需要外部隔离二极管。热反馈可对充电电流进行自动调节，以便在大功率操作或高环境温度条件下对芯片温度加以限制。充电电压固定于4.2V，而充电电流可通过一个电阻器进行外部设置。当充电电流在达到终浮充电压之后降至设定值1/10时，LY4057A将自动终止充电循环。当输入电压(交流适配器或USB电源)被拿掉时，LY4057A自动进入 一个低电流状态，将电池漏电流降至2uA以下。LY4057A在有电源时也可置于停机模式，以而将供电电流降至55uA。LY4057A的其他特点包括电池温度检 测、欠压闭锁、自动再充电和两个用于指示充电、结束的LED状态引脚。
特点：
高达1000mA的可编程充电电流
.无需MOSFET、检测电阻器或隔离二极管
.用于单节锂离子电池、采用SOP封装的完整线性充电器
恒定电流/恒定电压操作，并具有可在无过热危险的情况下实现充电速率大化的热调节功能
.精度达到+1.5%的4.2V预设充电电压
.用于电池电量检测的充电电流监控器输出
.自动再充电
充电状态双输出、无电池和故障状态显示
C/10充电终止
待机模式下的供电电流为55uA
.2.9V涓流充电器件版本
.软启动限制了浪涌电流
.电池温度监测功能
采用8引脚SOP-PP封装。（SOP-8）
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
