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| 型号： | MAX1951AESA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 2A 8SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 5.5 V |
| 输入电压： | 2.6 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 8-SOIC |
ATION
ILABLE
19-4689; Rev 0; 7/09
KIT
EVALU
AVA
1MHz, 2A, 2.6V to 5.5V Input, PWM DC-DC
Step-Down Regulator with Enable
General Description
The MAX1951A high-efficiency, DC-DC step-down
switching regulator delivers up to 2A of output current.
The device operates from an input voltage range of 2.6V
to 5.5V and provides an adjustable output voltage from
0.8V to V IN , making the MAX1951A ideal for on-board
postregulation applications. The MAX1951A total output
error is less than ±1.5% over load, line, and temperature.
The MAX1951A operates at a fixed frequency of 1MHz
with an efficiency of up to 94%. The high operating fre-
quency minimizes the size of external components.
Internal soft-start control circuitry reduces inrush current.
Short-circuit and thermal-overload protection improve
design reliability.
The MAX1951A can start up safely with a prebiased or
without a preexisting output. This feature simplifies track-
ing supply designs for core and I/O applications and
redundant supply designs.
The MAX1951A is available in an 8-pin SO package
and operates over the -40°C to +85°C extended tem-
perature range.
Applications
ASIC/DSP/μP/FPGA Core and I/O Voltages
Features
o Compact 0.385in 2 Circuit Footprint
o 10 μ F Ceramic Input and Output Capacitors, 2 μ H
Inductor for 2A Output
o Efficiency Up to 94%
o 1.5% Output Accuracy Over Load, Line, and
Temperature
o Guaranteed 2A Output Current
o Operates from 2.6V to 5.5V Supply
o Adjustable Output from 0.8V to V IN
o Internal Digital Soft-Soft
o Short-Circuit and Thermal-Overload Protection
o 1MHz Switching Frequency Reduces Component
Size
o Enable Input Audio Shutdown for Reducing
Power Consumption
o Safe Startup into Prebiased Output
Ordering Information
Set-Top Boxes
Networking and Telecommunications
PART
MAX1951AESA+
TEMP RANGE
-40 ° C to +85 ° C
PIN-PACKAGE
8 SO
Servers
TVs
Pin Configuration
+Denotes a lead(Pb)-free/RoHS-compliant package.
Typical Operating Circuit
TOP VIEW
INPUT
2.6V TO 5.5V
IN
LX
OUTPUT
0.8V TO V IN , UP TO 2A
+
V CC
1
8
IN
MAX1951A
V CC
FB
EN
2
7
LX
MAX1951A
GND
3
6
PGND
ON
COMP
EN
FB 4
5
COMP
PGND
GND
OFF
SO
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1951AESA+ | 功能描述:直流/直流开关调节器 1MHz 2A 2.6-5.5V PWM DC/DC Step-Down RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1951AESA+T | 功能描述:直流/直流开关调节器 1MHz 2A 2.6-5.5V PWM DC/DC Step-Down RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1951ESA | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1951ESA+ | 功能描述:直流/直流开关调节器 1MHz 2A 2.6-5.5V PWM DC/DC Step-Down RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX1951ESA+T | 功能描述:直流/直流开关调节器 1MHz 2A 2.6-5.5V PWM DC/DC Step-Down RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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