APW7093N

厂商：
ANPEC(茂达电子)
封装：
描述：
APW7093N - 3A, 1MHz, Step Down DC/DC Regulator - Anpec Electronics Coropration

数据手册：

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数据手册
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APW7093N 数据手册

APW7093 3A, 1MHz, Step Down DC/DC Regulator Features • • • • Source/Sink 3A Up to 1MHz Switches Frequency Up to 94% Efficiency Internal PMOS/NMOS Switches - 70mΩ/40mΩ On-Resistance at VIN = 4.5V - 90mΩ/60mΩ On-Resistance at VIN = 3V General Description The APW7093 is a reversible energy flow, constantoff-time, pulse-width modulated (PWM), step-down DC-DC converter. It is ideal for use in notebook and sub-notebook computers that require 1.1V to 5V active termination power supplies. This device features an internal PMOS power switch and internal synchronous rectifier for high efficiency and reduced component count. The internal 90mΩ PMOS power switch and 60mΩ NMOS synchronous-rectifier switch easily deliver continuous load currents up to 3A. The APW7093 accurately tracks an external reference voltage, produces an adjustable output from 1.1V to VIN, and achieves efficiencies as high as 94%. The APW 7093 uses a unique current-mode, constant-off-time, PWM control scheme that allows the output to source or sink current. This feature allows energy to return to the input power supply that otherwise would be wasted. The programmable constant-off-time architecture sets switching frequencies up to 1MHz, allowing the user to optimize performance trade-offs between efficiency, output switching noise, component size, and cost. The APW7093 features an adjustable soft-start to limit surge currents during startup, a 100% duty-cycle mode for low-dropout operation, and a low-power shutdown mode that disables the power switches and reduces supply current below 1µA. The APW7093 is available in a 32-pin QFN with an exposed backside pad or a 16-pin SSOP. • • • • • • • • • ± 1% Output Accuracy 1.1V to VIN Adjustable Output Voltage 3V to +5.5V Input Voltage Range 2KV, VMM > 200V 10ms , Itr > 1 00mA Carrier Tape & Reel Dimension t E Po P P1 D F W Bo Ao D1 Ko Copyright © A NPEC Electronics Corp. Rev. A.5 - Jun., 2005 19 www.anpec.com.tw APW7093 Carrier Tape & Reel Dimension T2 J C A B T1 Application A 6.95 B 5.4 T2 2.2 D0 D1 E 1.75±0.1 C1 13±0.3 F 5.5±0.05 C2 21±0.8 P0 4.0±0.1 T1 13.5±0.5 P1 8.0±0.1 T2 2.0±0.2 P2 2.0±0.05 C 80±1 1.55±0.05 1.55±0.1 W 12.0±0.3 W1 9.5 SSOP-16 T 0.3±0.05 (mm) Cover Tape Dimensions Application SSOP- 16 Carrier Width 16.8 Cover Tape Width 12.3 Devices Per Reel 2500 Customer Service Anpec Electronics Corp. Head Office : 5F, No. 2 Li-Hsin Road, SBIP, Hsin-Chu, Taiwan, R.O.C. Tel : 886-3-5642000 Fax : 886-3-5642050 Taipei Branch : 7F, No. 137, Lane 235, Pac Chiao Rd., Hsin Tien City, Taipei Hsien, Taiwan, R. O. C. Tel : 886-2-89191368 Fax : 886-2-89191369 Copyright © A NPEC Electronics Corp. Rev. A.5 - Jun., 2005 20 www.anpec.com.tw

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APW7093N

1. 物料型号： - 型号：APW7093 - 制造商：ANPEC Electronics Corp.

2. 器件简介： - APW7093是一款可逆能量流、恒定关断时间、脉冲宽度调制（PWM）的降压DC-DC转换器。适用于需要1.1V至5V主动终止电源的笔记本电脑和子笔记本电脑。该设备具有内部PMOS电源开关和内部同步整流器，以提高效率并减少组件数量。内部90mΩ PMOS电源开关和60mΩ NMOS同步整流器开关可以轻松提供高达3A的连续负载电流。APW7093能够准确跟踪外部参考电压，产生1.1V至VIN的可调输出，并实现高达94%的效率。

3. 引脚分配： - APW7093有32引脚QFN和16引脚SSOP两种封装形式。具体引脚功能如下： - N.C (No Connection)：1, 5, 7, 9, 11, 13, 16, 19, 25, 26, 28, 30, 32 - IN (Input Voltage)：2, 4 - LX (Inductor Connection)：3, 21, 22, 27, 29 - SS (Soft-Start)：6 - EXTREF (External Reference Input)：8 - TOFF (Off-Time Select)：10 - FB (Feedback Input)：12 - GND (Ground)：14, 17, backside pad, corner tabs - REF (Reference Output)：15 - Vcc (Analog Supply Voltage)：18 - PGND (Power Ground)：20, 23, 24 - SHDN (Shutdown Control)：31

4. 参数特性： - 输入电压范围：3V至5.5V - 输出电压可调：1.1V至VIN - 效率高达94% - 关断状态下的供电电流：<1µA - 可编程恒定关断时间操作 - 热关断保护 - 可调软启动涌流电流限制 - 输出短路保护 - 无铅可用（符合RoHS）

5. 功能详解： - APW7093在恒定关断时间模式下运行，通过改变PMOS开关的导通时间相对于恒定的关断时间来调节输出电压。该架构具有对线路和负载瞬变的快速响应的固有优势。

6. 应用信息： - 应用于主板、显卡、电缆或DSL调制解调器、机顶盒、DSP电源、内存电源、5V输入DC-DC调节器和分布式电源。

7. 封装信息： - 提供32引脚QFN和16引脚SSOP封装。 - QFN封装有暴露的背面垫，有助于散热和接地。

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