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| 型号： | MAX748ACWE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 3.3V 0.5A 16SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 46 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 3.3V |
| 输入电压： | 3.3 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 16-SOIC W |
19-0190; Rev 0; 9/93
3.3V, Step-Down,
Current-Mode PWM DC-DC Converters
__________________General Description
The MAX748A/MAX763A are 3.3V-output CMOS, step-
down switching regulators. The MAX748A accepts
inputs from 3.3V to 16V and delivers up to 500mA. The
MAX763A accepts inputs between 3.3V and 11V and
delivers up to 500mA. Typical efficiencies are 85% to
90%. Quiescent supply current is 1.4mA (MAX763A),
and only 0.2μA in shutdown.
Pulse-width-modulation (PWM) current-mode control pro-
vides precise output regulation and excellent transient
responses. Output voltage accuracy is guaranteed to be
±5% over line, load, and temperature variations.
Fixed-frequency switching allows easy filtering of output
ripple and noise, as well as the use of small external
components. A 22μH inductor works in most applica-
tions, so no magnetics design is necessary.
The MAX748A/MAX763A also feature cycle-by-cycle cur-
rent limiting, overcurrent limiting, undervoltage lockout,
and programmable soft-start protection. The MAX748A
________________________________Features
o Up to 500mA Load Currents
o Guaranteed 159kHz to 219.5kHz Current-Mode
PWM
o 85% to 90% Efficiencies
o 1.7mA Quiescent Current (MAX748A)
1.4mA Quiescent Current (MAX763A)
o 0.2μA Shutdown Supply Current
o 22μH Preselected Inductor Value;
No Component Design Required
o Overcurrent, Soft-Start, and Undervoltage
Lockout Protection
o Cycle-by-Cycle Current Limiting
o 8-Pin DIP/SO Packages (MAX763A)
_________________Ordering Information
is available in 8-pin DIP and 16-pin wide SO packages;
the MAX763A comes in 8-pin DIP and SO packages.
___________________________Applications
5V-to-3.3V Converters
Cellular Phones
Portable Instruments
PART
MAX748A CPA
MAX748ACWE
MAX748AC/D
MAX748AEPA
MAX748AEWE
MAX748AMJA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
PIN-PACKAGE
8 Plastic DIP
16 Wide SO
Dice*
8 Plastic DIP
16 Wide SO
8 CERDIP
Hand-Held Computers
Computer Peripherals
____________Typical Operating Circuit
INPUT
3.3V TO 16V
Ordering Information continued on last page.
* Contact factory for dice specifications.
____________________Pin Configurations
TOP VIEW
V+
LX
22 μ H
OUTPUT
3.3V
MAX748A
SHDN 1
8
V+
ON/OFF
SHDN
OUT
100 μ F
REF 2
SS 3
MAX748A
MAX763A
7
6
LX
GND
REF
SS
GND
CC
CC 4
DIP
5
OUT
Pin Configurations continued on last page.
_______________________________________________________________________ Maxim Integrated Products
Call toll free 1-800-998-8800 for free samples or literature.
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX748ACWE+ | 功能描述:直流/直流开关转换器 3.3V Step-Down DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX748ACWE+T | 功能描述:直流/直流开关转换器 3.3V Step-Down DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX748ACWE-T | 功能描述:直流/直流开关转换器 3.3V Step-Down DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX748AEPA | 功能描述:直流/直流开关转换器 3.3V Step-Down DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| MAX748AEPA+ | 功能描述:直流/直流开关转换器 3.3V Step-Down DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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