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参数资料
| 型号： | AP1538SG-13 |
| 厂商： | Diodes Inc |
| 文件页数： | 1/13页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 3A 8SOIC |
| 产品变化通告： | Wire Change 18/June/2008 Copper Bond Wire Change 13/Jan/2012 |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 18 V |
| 输入电压： | 3.6 V ~ 18 V |
| 频率 - 开关： | 300kHz |
| 电流 - 输出： | 3A |
| 同步整流器： | 无 |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOP |
AP1538
18V 3A 300KHz BUCK CONVERTER
Features
General Description
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Input voltage : 3.6V to 18V
Output voltage : 0.8V to V CC
Output current : up to 3A
Duty ratio: 0% to 99% PWM control
Oscillation frequency: 300KHz typical
Soft-start like, Current limit and Enable function
Thermal Shutdown function
Built-in internal SW P-channel MOS
SOP-8L and SOP-8L-DEP: Available in “Green”
Molding Compound (No Br, Sb)
Lead Free Finish / RoHS Compliant (Note 1)
AP1538 consists of step-down switching regulator with
PWM control. These devices include a reference voltage source,
oscillation circuit, error amplifier, internal PMOS.
AP1538 provides low-ripple power, high efficiency, and excellent
transient characteristics. The PWM control circuit is able to vary
the duty ratio linearly from 0 up to 99%. This converter also
contains an error amplifier circuit as well as a soft-start circuit that
prevents overshoot at startup. An enable function, an over
current protect function and a short circuit protect function are built
inside, and when OCP or SCP happens, the operation frequency
will be reduced from 300KHz to 50KHz. Also, an internal
compensation block is built in to minimum external component
count.
With the addition of an internal P-channel Power MOS, a coil,
capacitors, and a diode connected externally, these ICs can
function as step-down switching regulators. They serve as ideal
power supply units for portable devices when coupled with the
SOP-8L and SOP-8L-DEP mini-packages, providing such
outstanding features as low current consumption. Since this
converter can accommodate an input voltage up to 18V, it is also
suitable for the operation via an AC adapter.
Applications
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PC Motherboard
LCD Monitor
Graphic Card
DVD-Video Player
Telecom Equipment
ADSL Modem
Printer and other Peripheral Equipment
Microprocessor core supply
Typical Application Circuit
V IN
Vcc
Output
L1
22uH
V OUT = 5V/3A
C IN
R OCSET C OCSET
3K Option
OCSET
AP 1538
FB
Cc
Option *
R A
6.8K
+
C
+
C OUT
-
470uF
CVcc
0.1uF
R EN
100K
C EN
EN
V SS
D1 **
R B
1.3K
-
0.1uF
470uF ***
0.1uF
V OUT = V FB x (1+ R A /R B )
R B = 0.7K~5K ohm
Notes:
* Typical feedback compensation (Cc): 5600pF.
** Suggested DIODES Power Schottky P/N: B540 series or PDS540.
*** Suggested C OUT for V OUT < 1V; 680uF.
AP1538 Rev. 5
DS31451
1 of 13
OCTOBER 2009
? Diodes Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AP1538SG-U | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:18V 3A 300KHz BUCK CONVERTER |
| AP1539 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:18V 4A 300KHz BUCK CONVERTER |
| AP1539_0910 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:18V 4A 300KHz BUCK CONVERTER |
| AP1539SDPG-13 | 功能描述:开关变换器、稳压器与控制器 BUCK CNV 300KHz 4.4V PWM CONTROL 4A RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| AP-155 | 制造商:Amphenol Aerospace 功能描述:U-229-M55116/5, AUDIO PLUG 制造商:Amphenol Nexus 功能描述:AUDIO PLUG 5 CONDUCTOR - Bulk |
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