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MAX5094DAUA*

Description
1 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO8
Categorysemiconductor    Analog mixed-signal IC   
File Size295KB,22 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Parametric View All

MAX5094DAUA* Overview

1 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO8

MAX5094DAUA* Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals8
Rated input voltage15 V
Maximum limit input voltage25 V
Minimum limit input voltage12 V
Maximum operating temperature125 Cel
Minimum operating temperature-40 Cel
Processing package description0.150 INCH, MS-012AA, SOIC-8
stateACTIVE
CraftsmanshipBICMOS
packaging shapeRECTANGULAR
Package SizeSMALL OUTLINE
surface mountYes
Terminal formGULL WING
Terminal spacing1.27 mm
terminal coatingTIN LEAD
Terminal locationDUAL
Packaging MaterialsPLASTIC/EPOXY
Temperature levelAUTOMOTIVE
control modeVOLTAGE
Control TechnologyPULSE WIDTH MODULATION
Maximum output current1 A
Analog IC other typesSWITCHING CONTROLLER
Switch configurationSINGLE
Maximum switching frequency1000 kHz
19-3864; Rev 3; 10/06
High-Performance, Single-Ended, Current-Mode
PWM Controllers
General Description
The MAX5094A/B/C/D/MAX5095A/B/C BiCMOS, high-
performance, current-mode PWM controllers have all the
features required for wide input-voltage range
isolated/nonisolated power supplies. These controllers
are used for low- and high-power universal input volt-
age and telecom power supplies.
The MAX5094/MAX5095 contain a fast comparator with
only 60ns typical delay from current sense to the output
for overcurrent protection. The MAX5094 has an inte-
grated error amplifier with the output at COMP. Soft-
start is achieved by controlling the COMP voltage rise
using external components.
The oscillator frequency is adjustable from 20kHz to
1MHz with an external resistor and capacitor. The tim-
ing capacitor discharge current is trimmed allowing for
programmable dead time and maximum duty cycle for
a given frequency. The available saw-toothed waveform
at R
T
C
T
can be used for slope compensation when
needed.
The MAX5095A/MAX5095B include a bidirectional syn-
chronization circuit allowing for multiple controllers to
run at the same frequency to avoid beat frequencies.
Synchronization is accomplished by simply connecting
the SYNC of all devices together. When synchronizing
with other devices, the MAX5095A/MAX5095B with the
highest frequency synchronizes the other devices.
Alternatively, the MAX5095A/MAX5095B can be syn-
chronized to an external clock with an open-drain out-
put stage running at a higher frequency.
The MAX5095C provides a clock output pulse
(ADV_CLK) that leads the driver output (OUT) by
110ns. The advanced clock signal is used to drive the
secondary-side synchronous rectifiers.
The MAX5094A/B/C are available in the 8-pin SO and
8-pin µMAX
®
packages. The MAX5094D and
MAX5095A/B/C are available in the 8-pin µMAX pack-
age. All devices operate over the automotive tempera-
ture range of -40°C to +125°C.
Features
Pin-for-Pin Replacement for UCC28C43
(MAX5094A) and UCC28C45 (MAX5094B)
2A Drive Source and 1A Sink Capability
Up to 1MHz Switching Frequency Operation
Bidirectional Frequency Synchronization
(MAX5095A/MAX5095B)
Advanced Output Drive for Secondary-Side
Synchronous Rectification (MAX5095C)
Fast 60ns Cycle-by-Cycle Current Limit
Trimmed Oscillator Capacitor Discharge Current
Sets Maximum Duty Cycle Accurately
Accurate ±5% Start Voltage with 0.8V Hysteresis
Low 32µA Startup Current
5V Regulator Output (REF) with 20mA Capability
Versions with 0.3V Current-Sense Threshold
Overtemperature Shutdown
MAX5094A/B/C/D/MAX5095A/B/C
Ordering Information
PART
MAX5094AASA
MAX5094AASA+
MAX5094AAUA*
MAX5094AAUA+
MAX5094BASA*
MAX5094BASA+
MAX5094BAUA*
MAX5094BAUA+
TEMP RANGE
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
PIN-
PACKAGE
8 SO
8 SO
8 µMAX
8 µMAX
8 SO
8 SO
8 µMAX
8 µMAX
PKG
CODE
S8-4
S8-4
U8-1
U8-1
S8-4
S8-4
U8-1
U8-1
+Denotes
lead-free package.
*Future
product—contact factory for availability.
Ordering Information continued at end of data sheet.
Pin Configurations
TOP VIEW
COMP
1
8
7
REF
V
CC
OUT
GND
Applications
Universal Input AC/DC Power Supplies
Isolated Telecom Power Supplies
Isolated Power-Supply Modules
Networking Systems
Computer Systems/Servers
Industrial Power Conversion
Isolated Keep-Alive Circuits
µMAX is a registered trademark of Maxim Integrated Products, Inc.
FB
2
MAX5094
CS
3
6
5
R
T
/C
T
4
µMAX/SO
Pin Configurations continued at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
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