MAX756ESA Maxim Integrated Products, MAX756ESA Datasheet

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MAX756ESA

Manufacturer Part Number
MAX756ESA
Description
DC/DC Switching Converters 3.3/5/AdjV-Out Step Up DC/DC Converter
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX756CPA.pdf (8 pages)

Specifications of MAX756ESA

Output Voltage
5.5 V
Output Current
0.3 mA
Switching Frequency
500 KHz
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOIC-8
Minimum Operating Temperature
- 40 C
Number Of Outputs
1
Supply Current
0.06 A

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
BOSTOCK HK LIMITED BOSTOCK HK LIMITED
Part Number:
MAX756ESA+T
Manufacturer:
MAXIM
Quantity:
8 000
Company:
Meier Automation Equipment Co., Limited Meier Automation Equipment Co., Limited
Part Number:
MAX756ESA+T
Manufacturer:
MAXIM/美信
Quantity:
20 000
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.
________________________Applications
19-0113; Rev. 2; 1/95
Call toll free 1-800-998-8800 for free samples or literature.
__________Typical Operating Circuit
_______________General Description
0.1 F
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
2
1
3
SHDN
3/5
REF
________________________________________________________________ Maxim Integrated Products
MAX756
7
5
GND
LBI
150 F
OUT
LBO
LX
8
6
4
2V to V
INPUT
OUT
22 H
LOW-BATTERY
DETECTOR OUTPUT
1N5817
3.3V at 300mA
5V at 200mA
OUTPUT
100 F
or
3.3V/5V/Adjustable-Output,
Step-Up DC-DC Converters
____________________________Features
* Dice are tested at T
_________________Pin Configurations
______________Ordering Information
MAX756CPA
MAX756CSA
MAX756C/D
MAX756EPA
MAX756ESA
MAX757CPA
MAX757CSA
MAX757C/D
MAX757EPA
MAX757ESA
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
TOP VIEW
PART
SHDN
SHDN
LBO
REF
LBO
REF
3/5
FB
A
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
1
2
3
4
1
2
3
4
TEMP. RANGE
= +25°C only.
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
MAX756
DIP/SO
MAX757
DIP/SO
8
7
6
5
8
7
6
5
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
LX
GND
OUT
LBI
LX
GND
OUT
LBI
PIN-PACKAGE
1

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MAX756ESA Summary of contents

Page 1

... 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 * Dice are tested at T _________________Pin Configurations TOP VIEW OUT SHDN ...

Page 2

Step-Up DC-DC Converters ABSOLUTE MAXIMUM RATINGS Supply Voltage (OUT to GND) ....................................-0.3V, +7V Switch Voltage (LX to GND) ........................................-0.3V, +7V Auxiliary Pin Voltages (SHDN, LBI, LBO, REF, 3/ GND) ........................................-0.3V, (V Reference Current (I ) ....................................................2.5mA REF ...

Page 3

Operating Characteristics (Circuit of Figure +25°C, unless otherwise noted.) A EFFICIENCY vs. LOAD CURRENT 3.3V OUTPUT MODE 100 1000 ...

Page 4

Step-Up DC-DC Converters _____________________________Typical Operating Characteristics (continued) (Circuit of Figure +25°C, unless otherwise noted.) A LOAD-TRANSIENT RESPONSE OUTPUT VOLTAGE 50mV/div OUTPUT CURRENT 0mA to 200mA V = 2.5V IN HORIZONTAL = 50 s/div 5V Mode ______________________________________________________________Pin ...

Page 5

Description Operating Principle The MAX756/MAX757 combine a switch-mode regulator with an N-channel MOSFET, precision voltage reference, and power-fail detector in a single monolithic device. The MOSFET is a “sense-FET” type for best efficiency, and has a very low gate ...

Page 6

Step-Up DC-DC Converters 150 1N5817 8 5 LBI LX 6 MAX757 R4 OUT 1 2 SHDN REF LBO C3 GND 0 Figure 1. Standard Application Circuit ...

Page 7

The ESR of both bypass and filter capacitors affects efficiency. Best performance is obtained by using spe- cialized low-ESR capacitors, or connecting two or more filter capacitors in parallel. The smallest low-ESR SMT tantalum capacitors currently available are Sprague 595D ...

Page 8

Step-Up DC-DC Converters Step-Up DC-DC Converters PC Layout and Grounding The MAX756/MAX757 high peak currents and high-fre- quency operation make PC layout important for mini- mizing ground bounce and noise. The distance between the MAX756/MAX757’s GND pin and ...

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