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| 型号： | MAX757CPA+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 1/9页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 0.2A 8DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 2.7 V ~ 5.5 V |
| 输入电压： | 0.7 V ~ 5.5 V |
| 频率 - 开关： | 500kHz |
| 电流 - 输出： | 200mA |
| 同步整流器： | 无 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 供应商设备封装： | 8-PDIP |
EVALUATION KIT AVAILABLE
AVAILAB
LE
MAX756/MAX757
3.3V/5V/Adjustable-Output,
Step-Up DC-DC Converters
_______________General Description
The MAX756/MAX757 are CMOS step-up DC-DC switch-
ing regulators for small, low input voltage or battery-pow-
ered systems. The MAX756 accepts a positive input
voltage down to 0.7V and converts it to a higher pin-
selectable output voltage of 3.3V or 5V. The MAX757 is
an adjustable version that accepts an input voltage down
to 0.7V and generates a higher adjustable output voltage
in the range from 2.7V to 5.5V. Typical full-load efficiencies
for the MAX756/MAX757 are greater than 87%.
The MAX756/MAX757 provide three improvements over
previous devices. Physical size is reduced—the high
switching frequencies (up to 0.5MHz) made possible by
MOSFET power transistors allow for tiny (<5mm diameter)
surface-mount magnetics. Efficiency is improved to 87%
(10% better than with low-voltage regulators fabricated in
____________________________Features
? Operates Down to 0.7V Input Supply Voltage
? 87% Efficiency at 200mA
? 60μA Quiescent Current
? 20μA Shutdown Mode with Active Reference and
LBI Detector
? 500kHz Maximum Switching Frequency
? ±1.5% Reference Tolerance Over Temperature
? Low-Battery Detector (LBI/LBO)
? 8-Pin DIP and SO Packages
______________Ordering Information
bipolar technology). Supply current is reduced to 60μA
by CMOS construction and a unique constant-off-time
pulse-frequency modulation control scheme.
________________________Applications
3.3V to 5V Step-Up Conversion
Palmtop Computers
Portable Data-Collection Equipment
Personal Data Communicators/Computers
Medical Instrumentation
2-Cell & 3-Cell Battery-Operated Equipment
Glucose Meters
PART
MAX756 CPA
MAX756CSA
MAX756C/D
MAX756EPA
MAX756ESA
MAX757 CPA
MAX757CSA
MAX757C/D
MAX757EPA
MAX757ESA
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
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
PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
Functional Diagrams
__________Typical Operating Circuit
INPUT
2V to V OUT
* Dice are tested at T A = +25°C only.
_________________Pin Configurations
TOP VIEW
SHDN
1
8
LX
3/5
5
150 μ F
22 μ H
OUTPUT
5V at 200mA
2
REF 3
MAX756
7
6
GND
OUT
1
SHDN
LBI
LX
8
or
1N5817 3.3V at 300mA
LBO 4
5
LBI
100 μ F
DIP/SO
2
3/5
MAX756
OUT
6
SHDN
1
8
LX
FB
2
7
GND
DETECTOR OUTPUT
0.1 μ F
Pin Configurations appear at end of data sheet.
3 4 LOW-BATTERY
REF LBO
GND
REF 3
LBO 4
MAX757
6
5
OUT
LBI
Functional Diagrams continued at end of data sheet.
7
DIP/SO
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maxim integrated .com.
19-0113; Rev. 2; 1/95
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX757CPA+ | 功能描述:直流/直流开关转换器 3.3/5/AdjV-Out Step Up 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 |
| MAX757CSA | 功能描述:直流/直流开关转换器 3.3/5/AdjV-Out Step Up 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 |
| MAX757CSA+ | 功能描述:直流/直流开关转换器 3.3/5/AdjV-Out Step Up 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 |
| MAX757CSA+T | 功能描述:直流/直流开关转换器 3.3/5/AdjV-Out Step Up 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 |
| MAX757CSA-T | 功能描述:直流/直流开关转换器 3.3/5/AdjV-Out Step Up 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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