900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Maxim Integrated Semiconductor Electronic Components Datasheet

MAX763A Datasheet

Current-Mode PWM DC-DC Converters

No Preview Available !

19-0190; Rev 0; 9/93
3.3V, Step-Down,
Current-Mode PWM DC-DC Converters
__________________General Description
The MAX748A/MAX763A are 3.3V-output CMOS, step-
down switching regulators. The MAX748A accepts
inputs from 3.3V to 16V and delivers up to 500mA. The
MAX763A accepts inputs between 3.3V and 11V and
delivers up to 500mA. Typical efficiencies are 85% to
90%. Quiescent supply current is 1.4mA (MAX763A),
and only 0.2µA in shutdown.
Pulse-width-modulation (PWM) current-mode control pro-
vides precise output regulation and excellent transient
responses. Output voltage accuracy is guaranteed to be
±5% over line, load, and temperature variations.
Fixed-frequency switching allows easy filtering of output
ripple and noise, as well as the use of small external
components. A 22µH inductor works in most applica-
tions, so no magnetics design is necessary.
The MAX748A/MAX763A also feature cycle-by-cycle cur-
rent limiting, overcurrent limiting, undervoltage lockout,
and programmable soft-start protection. The MAX748A
is available in 8-pin DIP and 16-pin wide SO packages;
the MAX763A comes in 8-pin DIP and SO packages.
___________________________Applications
5V-to-3.3V Converters
Cellular Phones
Portable Instruments
Hand-Held Computers
Computer Peripherals
________________________________Features
o Up to 500mA Load Currents
o Guaranteed 159kHz to 219.5kHz Current-Mode
PWM
o 85% to 90% Efficiencies
o 1.7mA Quiescent Current (MAX748A)
1.4mA Quiescent Current (MAX763A)
o 0.2µA Shutdown Supply Current
o 22µH Preselected Inductor Value;
No Component Design Required
o Overcurrent, Soft-Start, and Undervoltage
Lockout Protection
o Cycle-by-Cycle Current Limiting
o 8-Pin DIP/SO Packages (MAX763A)
_________________Ordering Information
PART
MAX748ACPA
MAX748ACWE
MAX748AC/D
MAX748AEPA
MAX748AEWE
MAX748AMJA
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
-55°C to +125°C
PIN-PACKAGE
8 Plastic DIP
16 Wide SO
Dice*
8 Plastic DIP
16 Wide SO
8 CERDIP
Ordering Information continued on last page.
* Contact factory for dice specifications.
____________Typical Operating Circuit
INPUT
3.3V TO 16V
V+
LX
22µH
OUTPUT
3.3V
ON/OFF
MAX748A
SHDN
OUT
REF
SS
CC
GND
100µF
____________________Pin Configurations
TOP VIEW
SHDN 1
REF 2
SS 3
CC 4
MAX748A
MAX763A
DIP
8 V+
7 LX
6 GND
5 OUT
Pin Configurations continued on last page.
_______________________________________________________________________ Maxim Integrated Products 1
Call toll free 1-800-998-8800 for free samples or literature.
http://www.Datasheet4U.com/


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX763A Datasheet

Current-Mode PWM DC-DC Converters

No Preview Available !

3.3V, Step-Down,
Current-Mode PWM DC-DC Converters
ABSOLUTE MAXIMUM RATINGS
Pin Voltages:
V+ (MAX748A) ......................................................+17V, -0.3V
V+ (MAX763A) ......................................................+12V, -0.3V
LX (MAX748A) .................................(V+ - 21V) to (V+ + 0.3V)
LX (MAX763A) .................................(V+ - 12V) to (V+ + 0.3V)
OUT .................................................................................±25V
SS, CC, SHDN ..........................................-0.3V to (V+ + 0.3V)
Peak Switch Current (ILX) .....................................................2.0A
Reference Current (IREF) ...................................................2.5mA
Continuous Power Dissipation (TA = +70°C)
8-Pin Plastic DIP (derate 6.90mW/°C above +70°C)...552mW
8-Pin SO (derate 5.88mW/°C above +70°C) ...............471mW
16-Pin Wide SO (derate 9.52mW/°C above +70°C)....762mW
8-Pin CERDIP (derate 8.00mW/°C above +70°C) .......640mW
Operating Temperature Ranges:
MAX7_ _ AC_ _ ....................................................0°C to +70°C
MAX7_ _ AE_ _ .................................................-40°C to +85°C
MAX7_ _ AMJA_ _ ..........................................-55°C to +125°C
Junction Temperatures:
MAX7_ _ AC/E ..............................................................+150°C
MAX7_ _ AM .................................................................+175°C
Storage Temperature Range ............................-65°C to +160°C
Lead Temperature (soldering, 10sec) ............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 3, V+ = 5V, ILOAD = 0mA, TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER
Input Voltage Range
Output Voltage
Line Regulation
Load Regulation
CONDITIONS
C/E temp. ranges,
V+ = 4.0V to 16V,
0mA < ILOAD < 300mA
M temp. range,
V+ = 4.0V to 16V,
0mA < ILOAD < 250mA
C/E temp. ranges,
V+ = 4.75V to 16V,
0mA < ILOAD < 500mA
M temp. range,
V+ = 4.75V to 16V,
0mA < ILOAD < 400mA
C/E temp. ranges,
V+ = 4.0V to 11V,
0mA < ILOAD < 300mA
M temp. range,
V+ = 4.0V to 11V,
0mA < ILOAD < 250mA
C/E temp. ranges,
V+ = 4.75V to 11V,
0mA < ILOAD < 500mA
M temp. range,
V+ = 4.75V to 11V,
0mA < ILOAD < 400mA
ILOAD = 0mA to 500mA
MAX748A
MIN TYP MAX
3.3 16.0
MAX763A
MIN TYP MAX
3.3 11.0
UNITS
V
3.135 3.3 3.465
3.135 3.3 3.465
3.135 3.3 3.465
3.135 3.3 3.465
3.135 3.3 3.465
V
3.135 3.3 3.465
3.135 3.3 3.465
0.13
0.001
3.135 3.3 3.465
0.13
0.001
%/V
%/mA
2 ________________________________________________________________________________________________
http://www.Datasheet4U.com/


Part Number MAX763A
Description Current-Mode PWM DC-DC Converters
Maker Maxim
Total Page 12 Pages
PDF Download

MAX763A Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 MAX763A Current-Mode PWM DC-DC Converters
Maxim





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy