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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX5041A Datasheet

Dual-Phase / Parallelable / Average-Current-Mode Controllers

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19-3034; Rev 0; 10/03
Dual-Phase, Parallelable, Average-Current-Mode
Controllers
General Description
The MAX5038A/MAX5041A dual-phase, PWM controllers
provide high-output-current capability in a compact
package with a minimum number of external compo-
nents. The MAX5038A/MAX5041A utilize a dual-phase,
average-current-mode control that enables optimal use
of low RDS(ON) MOSFETs, eliminating the need for exter-
nal heatsinks even when delivering high output currents.
Differential sensing enables accurate control of the out-
put voltage, while adaptive voltage positioning provides
optimum transient response. An internal regulator
enables operation with input voltage ranges of +4.75V to
+5.5V or +8V to +28V. The high switching frequency, up
to 500kHz per phase, and dual-phase operation allow
the use of low-output inductor values and input capacitor
values. This accommodates the use of PC board-
embedded planar magnetics achieving superior reliabili-
ty, current sharing, thermal management, compact size,
and low system cost.
The MAX5038A/MAX5041A also feature a clock input
(CLKIN) for synchronization to an external clock, and a
clock output (CLKOUT) with programmable phase delay
(relative to CLKIN) for paralleling multiple phases. The
MAX5038A/MAX5041A also limit the reverse current in
case the bus voltage becomes higher than the regulat-
ed output voltage. The MAX5038A offers a variety of fac-
tory-trimmed preset output voltages (see Selector Guide)
and the MAX5041A offers an adjustable output voltage
between +1.0V to +3.3V.
The MAX5038A/MAX5041A operate over the extended
temperature range (-40°C to +85°C) and are available
in a 28-pin SSOP package. Refer to the MAX5037A and
MAX5065/MAX5067 data sheets for a VRM 9.0/VRM 9.1-
compatible, VID-controlled, adjustable output voltage
controller in a 44-pin MQFP/thin QFN or 28-pin SSOP
package.
Applications
Servers and Workstations
Point-of-Load High-Current/High-Density
Telecom DC-DC Regulators
Networking Systems
Large-Memory Arrays
RAID Systems
High-End Desktop Computers
Features
o +4.75V to +5.5V or +8V to +28V Input Voltage
Range
o Up to 60A Output Current
o Internal Voltage Regulator for a +12V or +24V
Power Bus
o True Differential Remote Output Sensing
o Two Out-Of-Phase Controllers Reduce Input
Capacitance Requirement and Distribute Power
Dissipation
o Average-Current-Mode Control
Superior Current Sharing Between Individual
Phases and Paralleled Modules
Accurate Current Limit Eliminates MOSFET and
Inductor Derating
o Limits Reverse-Current Sinking in Paralleled
Modules
o Integrated 4A Gate Drivers
o Selectable Fixed Frequency 250kHz or 500kHz per
Phase (Up to 1MHz for Two Phases)
o Fixed (MAX5038A) or Adjustable (MAX5041A)
Output Voltages
o External Frequency Synchronization from 125kHz
to 600kHz
o Internal PLL with Clock Output for Paralleling
Multiple DC-DC Converters
o Thermal Protection
o 28-Pin SSOP Package
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
OUTPUT
VOLTAGE
(V)
MAX5038AEAI12
MAX5038AEAI15
MAX5038AEAI18
MAX5038AEAI25
MAX5038AEAI33
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
28 SSOP
28 SSOP
28 SSOP
28 SSOP
28 SSOP
MAX5041AEAI -40°C to +85°C 28 SSOP
Fixed +1.2
Fixed +1.5
Fixed +1.8
Fixed +2.5
Fixed +3.3
Adj +1.0 to
+3.3
Pin Configuration appears at end of data sheet.
________________________________________________________________Maxim Integrated Products 1
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.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX5041A Datasheet

Dual-Phase / Parallelable / Average-Current-Mode Controllers

No Preview Available !

Dual-Phase, Parallelable, Average-Current-Mode
Controllers
ABSOLUTE MAXIMUM RATINGS
IN to SGND.............................................................-0.3V to +30V
BST_ to SGND ........................................................-0.3V to +35V
DH_ to LX_ ................................-0.3V to [(VBST_ - VLX_) + 0.3V]
DL_ to PGND ..............................................-0.3V to (VCC + 0.3V)
BST_ to LX_ ..............................................................-0.3V to +6V
VCC to SGND............................................................-0.3V to +6V
VCC to PGND............................................................-0.3V to +6V
SGND to PGND .....................................................-0.3V to +0.3V
All Other Pins to SGND...............................-0.3V to (VCC + 0.3V)
Continuous Power Dissipation (TA = +70°C)
28-Pin SSOP (derate 9.5mW/°C above +70°C) ..........762mW
Operating Temperature Range ...........................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+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
(VCC = +5V, circuit of Figure 1, TA = -40°C to +85°C, unless otherwise noted. Typical specifications are at TA = +25°C.) (Note 1)
PARAMETER
SYSTEM SPECIFICATIONS
SYMBOL
CONDITIONS
Input Voltage Range
VIN Short IN and VCC together for +5V input
operation
Quiescent Supply Current
Efficiency
OUTPUT VOLTAGE
IQ EN = VCC or SGND
η ILOAD = 52A (26A per phase)
Nominal Output Voltage
Accuracy (Note 4)
MAX5038A only, no load
MAX5038A only, no load, VIN = VCC =
+4.75V to +5.5V or VIN = +8V to +28V
(Note 2)
SENSE+ to SENSE- Voltage
Accuracy (Note 4)
STARTUP/INTERNAL REGULATOR
VCC Undervoltage Lockout
UVLO
MAX5041A only, no load
MAX5041A only, no load, VIN = VCC =
+4.75V to +5.5V or VIN = +8V to +28V
VCC rising
VCC Undervoltage Lockout
Hysteresis
VCC Output Accuracy
MOSFET DRIVERS
VIN = +8V to +28V, ISOURCE = 0 to 80mA
Output Driver Impedance
RON Low or high output
Output Driver Source/Sink
Current
IDH_, IDL_
Nonoverlap Time
OSCILLATOR AND PLL
tNO CDH_/DL_ = 5nF
Switching Frequency
PLL Lock Range
PLL Locking Time
CLKIN = SGND
fSW CLKIN = VCC
fPLL
tPLL
MIN TYP MAX UNITS
8 28
V
4.75 5.5
4 10 mA
90 %
-0.8
-1
0.992
0.990
+0.8
+1
1.008
1.010
%
V
4.0 4.15 4.5
200
4.85 5.1 5.30
V
mV
V
13
4
60
A
ns
238 250 262
kHz
475 500 525
125 600 kHz
200 µs
2 _______________________________________________________________________________________


Part Number MAX5041A
Description Dual-Phase / Parallelable / Average-Current-Mode Controllers
Maker Maxim Integrated
Total Page 26 Pages
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