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MAX5041EAI+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26
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°C to +85°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.
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
♦ +4.75V to +5.5V or +8V to +28V Input Voltage
Range
♦ Up to 60A Output Current
♦ Internal Voltage Regulator for a +12V or +24V
Power Bus
♦ True Differential Remote Output Sensing
♦ Two Out-Of-Phase Controllers Reduce Input
Capacitance Requirement and Distribute Power
Dissipation
♦ Average Current-Mode Control
Superior Current Sharing Between Individual
Phases and Paralleled Modules
Accurate Current Limit Eliminates MOSFET and
Inductor Derating
♦ Integrated 4A Gate Drivers
♦ Selectable Fixed Frequency 250kHz or 500kHz Per
Phase (Up to 1MHz for 2 Phases)
♦ Fixed (MAX5038) or Adjustable (MAX5041) Output
Voltages
♦ 0.5% Accurate Reference (MAX5041B)
♦ External Frequency Synchronization from 125kHz
to 600kHz
♦ Internal PLL with Clock Output for Paralleling
Multiple DC-DC Converters
♦ Thermal Protection
♦ 28-Pin SSOP Package
MAX5038/MAX5041
Dual-Phase, Parallelable, Average Current-Mode
Controllers
________________________________________________________________Maxim Integrated Products 1
19-2514; Rev 3; 8/04
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.
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
OUTPUT
VOLTAGE
MAX5038EAI12
-40°C to +85°C 28 SSOP
Fixed +1.2V
MAX5038EAI15
-40°C to +85°C 28 SSOP
Fixed +1.5V
MAX5038EAI18
-40°C to +85°C 28 SSOP
Fixed +1.8V
MAX5038EAI25
-40°C to +85°C 28 SSOP
Fixed +2.5V
MAX5038EAI33
-40°C to +85°C 28 SSOP
Fixed +3.3V
MAX5041EAI
-40°C to +85°C 28 SSOP
Adj +1.0V to
+3.3V
MAX5041BEAI
-40°C to +85°C 28 SSOP
Adj +1.0V to
+3.3V
Pin Configuration appears at end of data sheet.
MAX5038/MAX5041
Dual-Phase, Parallelable, Average Current-Mode
Controllers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +5V, circuit of Figure 1, T
A
= -40°C to +85°C, unless otherwise noted. Typical specifications are at T
A
= +25°C.) (Note 1)
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.
IN to SGND.............................................................-0.3V to +30V
BST_ to SGND…………………………………….…-0.3V to +35V
DH_ to LX_ ................................-0.3V to [(V
BST
_ - V
LX
_) + 0.3V]
DL_ to PGND..............................................-0.3V to (V
CC
+ 0.3V)
BST_ to LX_..............................................................-0.3V to +6V
V
CC
to SGND............................................................-0.3V to +6V
V
CC
to PGND............................................................-0.3V to +6V
SGND to PGND.....................................................-0.3V to +0.3V
All Other Pins to SGND...............................-0.3V to (V
CC
+ 0.3V)
Continuous Power Dissipation (T
A
= +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
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
SYSTEM SPECIFICATIONS
828
Input Voltage Range V
IN
Short IN and V
CC
together for +5V input
operation
4.75
5.5
V
Quiescent Supply Current I
Q
EN = V
CC
or SGND 4 10 mA
Efficiency η I
LOAD
= 52A (26A per phase) 90 %
OUTPUT VOLTAGE
MAX5038 only, no load
-0.8 +0.8
Nominal Output Voltage
Accuracy
MAX5038 only, no load, V
IN
= V
CC
=
+4.75V to +5.5V or V
IN
= +8V to +28V
(Note 2)
-1 +1
%
MAX5041 only, no load
0.992 1.008
MAX5041 only, no load, V
IN
= V
CC
=
+4.75V to +5.5V or V
IN
= +8V to +28V
0.990 1.010
MAX5041B only, no load
0.995 1.005
SENSE+ to SENSE- Voltage
Accuracy
MAX5041B only, no load,
V
IN
= +8V to +28V
0.995 1.005
V
STARTUP/INTERNAL REGULATOR
V
CC
Undervoltage Lockout UVLO V
CC
falling 4.0
4.15
4.5 V
V
CC
Undervoltage Lockout
Hysteresis
200
mV
V
CC
Output Accuracy V
IN
= +8V to +28V, I
SOURCE
= 0 to 80mA
4.85
5.1
5.30
V
MOSFET DRIVERS
Output Driver Impedance R
ON
Low or high output 1 3 Ω
Output Driver Source/Sink
Current
I
DH
_, I
DL
_
4A
Non-Overlap Time t
NO
C
DH
_
/DL
_ = 5nF 60 ns
MAX5038/MAX5041
Dual-Phase, Parallelable, Average Current-Mode
Controllers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +5V, circuit of Figure 1, T
A
= -40°C to +85°C, unless otherwise noted. Typical specifications are at T
A
= +25°C.) (Note 1)
SYMBOL
MIN
TYP
MAX
UNITS
238 250
475 500
125
200
115 120
φ
CLKOUT
degrees
V
CLKINH
V
CLKINL
200
V
PHASEH
V
PHASEL
+50
V
CLKOUTL
V
CLKOUTH
Average Current-Limit Threshold
112
260
V
CMR
(
CS
)
-0.3 +3.6
V
OS
(
CS
)
550
A
VOL
(
CE
)
V
CMR
(
DIFF
)
-0.3 +1.0
V
OS
(
DIFF
)
0.997
1.003
A
V
(
DIFF
)
0.495
0.505
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P26

MAX5041EAI+T

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Buy MAX5041EAI+T
Manufacturer:
Maxim Integrated
Description:
Switching Controllers Dual-Phase Parallelable Average
Lifecycle:
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