參數(shù)資料
型號： MAX857
廠商： Maxim Integrated Products, Inc.
英文描述： Dual 2-Line To 4-Line Decoders/Demultiplexers 16-CDIP -55 to 125
中文描述： 3.3V/5V或可調(diào)輸出、升壓型DC-DC轉(zhuǎn)換器
文件頁數(shù)： 1/12頁
文件大小： 126K
代理商： MAX857
_______________General Desc ription
The MAX856–MAX859 are high-efficiency, CMOS, step-
up, DC-DC switching regulators for small, low input volt-
age or battery-powered systems. The MAX856/MAX858
accept a positive input voltage between 0.8V and V
OUT
and convert it to a higher, pin-selectable output voltage of
3.3V or 5V. The MAX857/MAX859 adjustable versions
accept 0.8V to 6.0V input voltages and generate higher
adjustable output voltages in the 2.7V to 6.0V range.
Typical efficiencies are greater than 85%. Typical quies-
cent supply current is 25μA (1μA in shutdown).
The MAX856–MAX859 combine ultra-low quiescent supply
current and high efficiency to give maximum battery life. An
internal MOSFET power transistor permits high switching
frequencies. This benefit, combined with internally set peak
inductor current limits, permits the use of small, low-cost
inductors. The MAX856/MAX857 have a 500mA peak
inductor current limit. The MAX858/MAX859 have a 125mA
peak inductor current limit.
________________________Applic ations
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
____________________________Features
o
0.8V to 6.0V Input Supply Voltage
o
0.8V Typ Start-Up Supply Voltage
o
85% Efficiency at 100mA
o
25μA Quiescent Current
o
1μA Shutdown Mode
o
125mA and 500mA Switch-Current Limits Permit
Use of Low-Cost Inductors
o
Up to 500kHz Switching Frequency
o
±1.5% Reference Tolerance Over Temperature
o
Low-Battery Detector (LBI/LBO)
o
8-Pin SO and μMAX Packages
______________Ordering Information
Ordering Information continued at end of data sheet.
* Dice are tested at T
= +25°C only.
Contact factory for availability.
M
3.3V /5V or Adjustable-Output,
S tep-Up DC-DC Converters
________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
1
1
2
3
4
8
7
6
5
LX
GND
OUT
LBI
LBO
REF
3/5
SHDN
MAX856
MAX858
SO/
μ
MAX
TOP VIEW
1
2
3
4
8
7
6
5
LX
GND
OUT
LBI
LBO
REF
FB
SHDN
MAX857
MAX859
SO/
μ
MAX
__________________Pin Configuration
MAX856
SHDN
3/5
REF
LX
GND
OUT
INPUT
0.8V TOV
OUT
1N5817
OUTPUT
5V AT 100mA
OR
3.3V AT 125mA
LBO
68
μ
F
47
μ
H
LOW-BATTERY
DETECTOR OUTPUT
ON/OFF
3V/5V SELECT
LBI
LOW-BATTERY
DETECTOR
INPUT
__________Typic al Operating Circ uit
19-0211; Rev 4; 5/96
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-55°C to +125°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-55°C to +125°C
PIN-PACKAGE
8 SO
8 μMAX
Dice*
8 SO
8 CERDIP
8 SO
8 μMAX
Dice*
8 SO
8 CERDIP
MAX856
CSA
MAX856CUA
MAX856C/D
MAX856ESA
MAX856MJ A
MAX857
CSA
MAX857CUA
MAX857C/D
MAX857ESA
MAX857MJ A
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
相關(guān)PDF資料
PDF描述
MAX857CSA 3.3V/5V or Adjustable-Output, Step-Up DC-DC Converters
MAX858ESA 3.3V/5V or Adjustable-Output, Step-Up DC-DC Converters
MAX857ESA 3.3V/5V or Adjustable-Output, Step-Up DC-DC Converters
MAX857MJA 8-Line To 1-Line Data Selectors/Multiplexers 16-CDIP -55 to 125
MAX858CSA 8-Line To 1-Line Data Selectors/Multiplexers 16-CDIP -55 to 125
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX8570ELT+ 制造商:Maxim Integrated Products 功能描述:- Rail/Tube
MAX8570ELT+T 功能描述:LCD 驅(qū)動器 High-Efficiency LCD Boost RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
MAX8570ELT+TG47 功能描述:LCD 驅(qū)動器 High-Efficiency LCD Boost with True Shutdown RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
MAX8570EUT 制造商:Maxim Integrated Products 功能描述:HI-EFFICIENCY 15V LCD STEP-UP DC-DC - Rail/Tube
MAX8570EUT+ 制造商:Maxim Integrated Products 功能描述:LCD DRVR 2.7V TO 5.5V 6PIN SOT-23 - Rail/Tube
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