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MAX756-MAX757

Description
1 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8
Categorysemiconductor    Analog mixed-signal IC   
File Size324KB,9 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Parametric Compare View All

MAX756-MAX757 Overview

1 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8

MAX756-MAX757 Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals8
Rated input voltage2.5 V
Maximum limit input voltage6 V
Minimum limit input voltage1.1 V
Maximum operating temperature85 Cel
Minimum operating temperature-40 Cel
Processing package descriptionPLASTIC, SOP-8
stateACTIVE
CraftsmanshipCMOS
packaging shapeRECTANGULAR
Package SizeSMALL OUTLINE
surface mountYes
Terminal formGULL WING
Terminal spacing1.27 mm
terminal coatingTIN LEAD
Terminal locationDUAL
Packaging MaterialsPLASTIC/EPOXY
Temperature levelINDUSTRIAL
control modePEAK CURRENT
Control TechnologyCONSTANT OFF TIME
Maximum output current1 A
Analog IC other typesSWITCHING REGULATOR
Rated regulated voltage3.3 V
Switch configurationBOOST
Maximum switching frequency500 kHz
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
bipolar technology). Supply current is reduced to 60µA
by CMOS construction and a unique constant-off-time
pulse-frequency modulation control scheme.
____________________________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
PART
MAX756CPA
MAX756CSA
MAX756C/D
MAX756EPA
MAX756ESA
MAX757CPA
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
________________________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
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
2
8
7
LX
GND
OUT
LBI
150μF
5
1
LBI
SHDN
LX
8
OUTPUT
22μH
5V at 200mA
or
1N5817
3.3V at 300mA
100μF
3/5
REF
3
LBO
4
MAX756
6
5
DIP/SO
SHDN
FB
1
2
8
7
2
MAX756
3/5
OUT
6
LX
GND
OUT
LBI
3
REF
LBO
4
LOW-BATTERY
DETECTOR OUTPUT
REF
3
LBO
4
MAX757
6
5
GND
0.1μF
Pin Configurations appear at end of data sheet.
7
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
DIP/SO
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-0113; Rev. 2; 1/95

MAX756-MAX757 Related Products

MAX756-MAX757 MAX757C/D MAX757 MAX756C/D MAX756 MAX756EPA+
Description 1 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8 1 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8 1 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8 1 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8 1 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO8 IC REG BOOST PROG 8DIP
Number of functions 1 1 1 1 1 1
Number of terminals 8 9 8 9 8 8
Maximum operating temperature 85 Cel 70 °C 85 Cel 70 °C 85 Cel 85 °C
Minimum operating temperature -40 Cel - -40 Cel - -40 Cel -40 °C
surface mount Yes YES Yes YES Yes NO
Terminal form GULL WING NO LEAD GULL WING NO LEAD GULL WING THROUGH-HOLE
Terminal location DUAL UPPER DUAL UPPER DUAL DUAL
Temperature level INDUSTRIAL COMMERCIAL INDUSTRIAL COMMERCIAL INDUSTRIAL INDUSTRIAL
control mode PEAK CURRENT CURRENT-MODE PEAK CURRENT CURRENT-MODE PEAK CURRENT CURRENT-MODE
Control Technology CONSTANT OFF TIME CONSTANT OFF TIME CONSTANT OFF TIME CONSTANT OFF TIME CONSTANT OFF TIME CONSTANT OFF TIME
Maximum output current 1 A 1 A 1 A 1 A 1 A 1 A
Switch configuration BOOST BOOST BOOST BOOST BOOST BOOST
Maximum switching frequency 500 kHz 500 kHz 500 kHz 500 kHz 500 kHz 500 kHz
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