SD5510为一款移动电源专用的单节锂离子电池充电器和恒定5V升压控制器，充电部分集高精度电压和充电电流调节器、预充、充电状态指示和充电截止等功能于一体，可以输出大1A充电电流。而升压电路采用CMOS工艺制造的空载电流极低的VFM开关型DC/DC升压转换器。其具有极低的空载功耗（小于10uA），且升压输出驱动电流能力能达到1A。无需外部按键，可以即插即用。
SD5510为一款移动电源专用的单节锂离子电池充电器和恒定5V升压控制器，充电部分集高精度电压和充电电流调节器、预充、充电状态指示和充电截止等功能于一体，可以输出大1A充电电流。而升压电路采用CMOS工艺制造的空载电流极低的VFM开关型DC/DC升压转换器。其具有极低的空载功耗（小于10uA），且升压输出驱动电流能力能达到1A。无需外部按键，可以即插即用。
充电部分为线性降压方式，内置PMOSFET，加上防倒灌电路，所以不需要外部检测电阻器和隔离二极管。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，充满电压固定于4.2V。充电电流可通过一个电阻器进行外部设置。当电池达到4.2V之后，充电电流逐渐下降至设定电流值1/5， SD5510将自动终止充电。升压部分同样内置了功率NMOSFET，较小的内阻可以提供驱动能力达到5V/1A。较高的集成度使得SD5510 只需少量的外围器件即可正常工作。 SD5510还集成了充电温度保护，升压输入电源限流环路，可根据负载情况动态调节电流，并具有快速响应和过流关断功能。升压转换器采用变频的方式，因此较国内外同类产品具有极低的空载功耗、纹波、更强的驱动能力，以及更高的效率。
特点
★典型值高达1000mA的可编程充电电流，大可达到1.2A；
★高达1A的升压输出电流（Vbat=3.3V），高输出1.5A(Vbat=3.8v)；
★自动频率调整（VFM）,适应不同升压负载（5V空载待机电流小于10uA）,无需按键启动低电池电压（小于2.7V）自动停止升压；
★用于单节锂离子电池移动电源专用电路；
★升压高效率：88%(Typ)，大92%；
★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%的4.2V预设充电电压；
★精度达到±2.5%的5V预设升压精度，5V电压可通过外接电阻微调；
★高输入可达10V；
★2个充电状态指示:开漏输出驱动LED；
★C/5充电终止电流；
★2.9V以下涓流充C/5；
★充电软启动减少浪涌电流；
★无需MOSFET、检测电阻器或隔离二极管；
★8引脚ESOP散热加强型封装。
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
