AP1603_10

厂商：
DIODES
封装：
描述：
AP1603_10 - STEP-UP DC/DC CONVERTER - Diodes Incorporated

数据手册：

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数据手册
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AP1603_10 数据手册

AP1603 STEP-UP DC/DC CONVERTER Description The AP1603 is a high efficiency step-up DC/DC converter for applications using as few as a single NiMH or Li-Ion battery cells. Only four external components are required to deliver a fixed output voltage of 3.3V. The AP1603 starts up from less than 0.9V input with 1mA load. Pulse Frequency Modulation scheme brings optimized performance for applications with light output loading and low input voltages. The output ripple and noise are lower compared with the circuits operating in PSM mode. The PFM control circuit operating in 150KHz (max.) switching rate results in smaller passive components. The space saving SOT26 packages make the AP1603 an ideal choice of DC/DC converter for space conscious applications, like pagers, electronic cameras, and wireless microphones. Pin Assignments ( Top View ) FB 1 GND 2 REF 3 SOT26 AP1603 6 SHDN 5 OUT 7 LX 4 Features • • • • • • • A Guaranteed Start-Up from less than 0.9 V High Efficiency Low Quiescent Current Less Number of External Components needed Low Ripple and Low Noise Space Saving Lead Free Package: SOT26 Lead Free Finish/ RoHS Compliant (Note 1) Applications • • • • • • Pagers Cameras Wireless Microphones Pocket Organizers Battery Backup Suppliers Portable Instruments Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. AP1603 Document number: DS31131 Rev. 3 - 2 1 of 10 www.diodes.com June 2010 © Diodes Incorporated AP1603 STEP-UP DC/DC CONVERTER Typical Application Circuit (1) VOUT = 5V 1.1V to 5.5V VIN ON OFF 22uH + 47uF SHDN REF 0.1uF GND LX OUT FB + 47uF Fixed Output ( 5V ) (2) VOUT = 3.3V 1.1V to 3.6V VIN ON 22uH + 47uF OFF SHDN REF 0.1uF GND LX OUT FB + 47uF Fixed Output ( 3.3V ) (3) VOUT = Adj 1.1V to 5.5V V IN ON OFF SHDN REF 0.1uF G ND FB LX OUT R2 22uH + 47uF + Output 47uF R1 R2 V OUT = V REF ( 1+ R1 ) AP1603 Document number: DS31131 Rev. 3 - 2 2 of 10 www.diodes.com June 2010 © Diodes Incorporated AP1603 STEP-UP DC/DC CONVERTER Pin Descriptions Pin Name FB GND REF LX OUT SHDN Description Feedback. Ground. 1.2V Reference Voltage. Bypass with a 0.1μF capacitor. N-Channel and P-Channel Power MOSFET Drain. Power Output. OUT provides bootstrap power to the IC. Shutdown Input. Drive high (>80% of VOUT) for operating mode. Drive low (

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AP1603_10

### 物料型号 - 型号：AP1603

### 器件简介 - AP1603是一款高效率的升压型DC/DC转换器，适用于使用最少至单节NiMH或Li-Ion电池单元的应用。仅需四个外部元件即可提供固定的3.3V输出电压。AP1603从低于0.9V的输入电压开始工作，并带有1mA的负载。脉冲频率调制（PFM）方案为轻负载输出和低输入电压的应用提供了优化的性能。与在PSM模式下工作的电路相比，输出纹波和噪声更低。

### 引脚分配 - FB（Feedback）：反馈。 - GND（Ground）：地。 - REF（1.2V参考电压）：旁路一个0.1pF电容器。 - LX（N-Channel和P-Channel Power MOSFET漏极）：N-Channel和P-Channel Power MOSFET漏极。 - OUT（Power Output）：电源输出，OUT为IC提供自举电源。 - SHDN（Shutdown Input）：关闭输入。驱动高电平（>80%的Vour）为工作模式，驱动低电平（<20%的Vour）为关闭模式。正常操作时连接到OUT。

### 参数特性 - 保证从低于0.9V启动。 - 高效率。 - 低静态电流。 - 需要较少的外部元件。 - 低纹波和低噪声。 - 节省空间的无铅封装：SOT26。 - 符合RoHS指令的无铅完成/RoHS合规。

### 功能详解 - AP1603 PFM（脉冲频率调制）转换器IC系列将开关模式转换器、功率MOSFET和精密电压参考集成在一个单片设备中。它们提供了极低的静态电流、高效率和非常低的门限电压，以确保在低电池电压（0.9V典型值）下启动。设计用于最大化便携产品的电池寿命，并通过仅在需要服务负载时切换来最小化开关损失。

### 应用信息 - 寻呼机、相机、无线麦克风、掌上电脑、电池备份电源、便携式仪器。

### 封装信息 - 封装类型：SOT26。 - 封装尺寸：详见PDF文档中的“Package Outline Dimensions”部分。

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