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MAX5038 Datasheet

  • MAX5038

  • "Dual-Phase, Parallelable, Average Current-Mode Controllers"

  • Maxim   Maxim

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19-2514; Rev 3; 8/04
Dual-Phase, Parallelable, Average Current-Mode
Controllers
General Description
The MAX5038/MAX5041 dual-phase, PWM controllers
provide high-output-current capability in a compact
package with a minimum number of external compo-
nents. The MAX5038/MAX5041 utilize a dual-phase,
average current-mode control that enables optimal use
of low R
DS(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 MAX5038/MAX5041 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
MAX5038 offers a variety of factory-trimmed preset output
voltages (see
Selector Guide)
and the MAX5041 offers an
adjustable output voltage from +1.0V to +3.3V.
The MAX5038/MAX5041 operate over the extended
industrial temperature range (-40擄C to +85擄C) and are
available in a 28-pin SSOP package. Refer to the
MAX5037 data sheet for a VRM 9.0-compatible, VID-
controlled output voltage controller in a 44-pin MQFP or
QFN package.
Features
鈾?/div>
+4.75V to +5.5V or +8V to +28V Input Voltage
Range
鈾?/div>
Up to 60A Output Current
鈾?/div>
Internal Voltage Regulator for a +12V or +24V
Power Bus
鈾?/div>
True Differential Remote Output Sensing
鈾?/div>
Two Out-Of-Phase Controllers Reduce Input
Capacitance Requirement and Distribute Power
Dissipation
鈾?/div>
Average Current-Mode Control
Superior Current Sharing Between Individual
Phases and Paralleled Modules
Accurate Current Limit Eliminates MOSFET and
Inductor Derating
鈾?/div>
Integrated 4A Gate Drivers
鈾?/div>
Selectable Fixed Frequency 250kHz or 500kHz Per
Phase (Up to 1MHz for 2 Phases)
鈾?/div>
Fixed (MAX5038) or Adjustable (MAX5041) Output
Voltages
鈾?/div>
0.5% Accurate Reference (MAX5041B)
鈾?/div>
External Frequency Synchronization from 125kHz
to 600kHz
鈾?/div>
Internal PLL with Clock Output for Paralleling
Multiple DC-DC Converters
鈾?/div>
Thermal Protection
鈾?/div>
28-Pin SSOP Package
MAX5038/MAX5041
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
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
28 SSOP
28 SSOP
28 SSOP
28 SSOP
28 SSOP
28 SSOP
28 SSOP
OUTPUT
VOLTAGE
Fixed +1.2V
Fixed +1.5V
Fixed +1.8V
Fixed +2.5V
Fixed +3.3V
Adj +1.0V to
+3.3V
Adj +1.0V to
+3.3V
MAX5038EAI12
-40擄C to +85擄C
MAX5038EAI15
MAX5038EAI18
MAX5038EAI25
MAX5038EAI33
MAX5041EAI
MAX5041BEAI
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
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鈥檚 website at www.maxim-ic.com.

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MAX5041

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