LM4890S是一款专为要求苛刻的移动电话和其他便携式通信设备的应用程序的音频功率放大器。它能够提供 1W 的连续平均功率一个8Ω BTL 负载从一个5V 小于 1％的失真（ THD + N）DC 电源。
Boomer 音频功率放大器是专为提供高品质的输出功率与小量的的外部元件。LM4890S不需要输出耦合电容或自举电容，因此就是非常适用于移动电话和其他低电压应用程序的阳离子，其中小的功率消耗是一个主要的要求 。
LM4890S设有低功耗的停机模式，它是通过驱动关断引脚与实现逻辑低。此外，具有内部热敏MAL 关断保护机制。
LM4890S包含高级弹出&点击电路，消除了将在否则会出现噪音导通和关断的过渡。
LM4890S是单位增益稳定，可以通过配置外部增益设置电阻.
主要规格：
PSRR 在 217Hz 时，VDD= 5V（图 1）的 62dB(典型)
功率输出在 5.0V & 1 ％ THD 1W(典型)
电源输出电压为 3.3V & 1 ％ THD 400mW(典型)
关断电流 0.1µA(典型)
特性：
超低电流关断模式
提供节省空间的封装： MSOP-8
BTL 输出可以驱动容性负载
改进弹出&点击电路中消除噪音导通和关断的过渡
2.2 - 5.5V 工作电压
无输出耦合电容，缓冲网络或所需的自举电容
单位增益稳定
外部增益配置能力
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
