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参数资料
型号： MAX1642
厂商： Maxim Integrated Products, Inc.
元件分类： DC/DC变换器
英文描述： High-Efficiency, Step-Up DC-DC Converters for 1V Inputs
中文描述： 高效率、升压型DC-DC转换器、输入可低至1V
文件页数： 1/12页
文件大小： 130K
代理商： MAX1642
_______________General Desc ription
The MAX1642/MAX1643 are high-efficiency, low-voltage,
step-up DC-DC converters intended for devices pow-
ered by a single alkaline cell. They feature low quies-
cent supply currents and are supplied in the ultra-small
μMAX package, which is only 1.1mm high. The guaran-
teed start-up voltage is 0.88V.
Each device consists of an internal 1
, N-channel
MOSFET power switch; a built-in synchronous rectifier
that acts as the catch diode; an oscillator; a reference;
and pulse-frequency-modulation (PFM) control circuitry.
Both devices feature an independent undervoltage
comparator (PFI/
PFO
). The MAX1642 also includes a
2μA logic-controlled shutdown mode. The MAX1643
offers a dedicated low-battery detector (
BATTLO
) in
lieu of shutdown.
The output voltage for each device is preset to 3.3V
±4%, or can be adjusted from +2V to +5.2V using only
two resistors.
________________________Applic ations
Pagers
Remote Controls
Pointing Devices
Personal Medical Monitors
Single-Cell Battery-Powered Devices
____________________________Features
o
Built-In Synchronous Rectifier
o
0.88V Guaranteed Start-Up
o
Ultra-Small μMAX Package: 1.1mm High
o
83% Efficiency
o
4μA Quiescent Supply Current into BATT Pin
o
2μA Logic-Controlled Shutdown (MAX1642)
o
Two Undervoltage Detectors (MAX1643)
o
2V to 5.2V Output Range
o
20mA Output Current at 1.2V Input
o
Reverse Battery Protection
M
High-Effic ienc y, S tep-Up
DC-DC Converters for 1V Inputs
________________________________________________________________ Maxim Integrated Products
1
GND
PFO
FB
SHDN
1
2
8
7
OUT
LX
PFI
BATT
MAX1642
μ
MAX
TOP VIEW
3
4
6
5
GND
BATTLO
FB
PFO
1
2
8
7
OUT
LX
PFI
BATT
MAX1643
μ
MAX
3
4
6
5
_________________Pin Configurations
OUT
OUTPUT
3.3V
INPUT
0.88V TO1.65V
100
μ
H
22
μ
F
22
μ
F
ON
LOW-BATTERY
DETECTOR INPUT
LOW-BATTERY
DETECTOR OUTPUT
OFF
PFO
BATT
LX
MAX1642
SHDN
PFI
GND
FB
__________Typic al Operating Circ uit
______________Ordering Information
PART
MAX1642
C/D
MAX1642EUA
MAX1643
C/D
MAX1643EUA
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
Dice*
8 μMAX
Dice*
8 μMAX
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
19-1183; Rev 0; 6/97
*Dice are tested at T
A
= +25°C.
Note: To order these devices shipped in tape and reel, add a -T
to the part number.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
相关PDF资料
PDF描述
MAX1642EUA High-Efficiency, Step-Up DC-DC Converters for 1V Inputs
MAX1643EUA High-Efficiency, Step-Up DC-DC Converters for 1V Inputs
MAX1642-MAX1643 High-Efficiency, Step-Up DC-DC Converters for 1V Inputs
MAX1644 Advanced Chemistry-Independent, Level 2 Battery Charger with Input Current Limiting
MAX1645B Advanced Chemistry-Independent, Level 2 Battery Charger with Input Current Limiting
相关代理商/技术参数
参数描述
MAX1642EUA 功能描述:直流/直流开关转换器 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
MAX1642EUA+ 功能描述:直流/直流开关转换器 Integrated Circuits (ICs) 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
MAX1642EUA+T 功能描述:直流/直流开关转换器 Integrated Circuits (ICs) 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
MAX1642EUA-T 功能描述:直流/直流开关转换器 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
MAX1642EVKIT 功能描述:电源管理IC开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
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