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MAX5038A Datasheet

  • MAX5038A

  • 雙相、可并聯(lián)、平均電流模式控制器

  • 680.67KB

  • 26頁(yè)

  • MAXIM   MAXIM

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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 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 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擄C to +85擄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.
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
MAX5038A/MAX5041A
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
PART
MAX5038A
EAI12
MAX5038AEAI15
MAX5038AEAI18
MAX5038AEAI25
MAX5038AEAI33
MAX5041AEAI
Ordering Information
TEMP RANGE
-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-
PACKAGE
28 SSOP
28 SSOP
28 SSOP
28 SSOP
28 SSOP
28 SSOP
OUTPUT
VOLTAGE
(V)
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鈥檚 website at www.maxim-ic.com.

MAX5038A PDF文件相關(guān)型號(hào)

MAX5038AEAI12,MAX5038AEAI15,MAX5038AEAI18,MAX5038AEAI25,MAX5038AEAI33,MAX5041A,MAX5041AEAI

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