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What is LTM4650A?

This electronic component, produced by the manufacturer "Linear Technology", performs the same function as "Dual 25A or Single 50A DC/DC uModule Regulator".


LTM4650A Datasheet PDF - Linear Technology

Part Number LTM4650A
Description Dual 25A or Single 50A DC/DC uModule Regulator
Manufacturers Linear Technology 
Logo Linear Technology Logo 


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Features
LTM4650A
Dual 25A or Single 50A
DC/DC µModule Regulator
with 1% DC Accuracy
Description
nn Dual 25A or Single 50A Output
nn Input Voltage Range: 4.5V to 16V
nn Output Voltage Range: 0.6V to 5.5V
nn ±1% Maximum Total DC Output Error Over Line,
Load and Temperature
nn Higher Light Load Efficiency and Wider VOUT Range
Than LTM4650-1
nn Differential Remote Sense Amplifier
nn Current Mode Control/Fast Transient Response
nn Multiphase Parallel Current Sharing Up to 300A
nn Internal Temperature Monitor
nn Adjustable Switching Frequency or Synchronization
nn Overcurrent Foldback Protection
nn Selectable Burst Mode® Operation, Pulse-Skipping
Mode Operation
nn Soft-Start/Voltage Tracking
nn Output Overvoltage Protection
nn 16mm × 16mm × 5.01mm BGA Package
Applications
nn Telecom and Networking Equipment
nn Storage and ATCA Cards
nn Industrial Equipment
The LTM®4650A is a dual 25A or single 50A output switch-
ing mode step-down DC/DC µModule® (micromodule)
regulator with ±1% total DC output error. Included in the
package are the switching controllers, power FETs, induc-
tors and all supporting components. Operating from an
input voltage range of 4.5V to 16V, the LTM4650A supports
two outputs with an output voltage range of 0.6V to 5.5V,
each set by a single external resistor. Its high efficiency
design delivers up to 25A continuous current for each
output. Only a few input and output capacitors are needed.
Fast internal control loop compensation allows for fast
transient response to minimize output capacitance when
powering FPGAs, ASICs, and processors.
Fault protection features include overvoltage and over-
current protection. The LTM4650A is offered in 16mm ×
16mm × 5.01mm BGA package.
LTM4650 Product Family Selection Table
LTM4650
LTM4650-1B
LTM6450-1A
RAVNINGE
4.5V to
15V
RVAONUGTE
IOUT
0.6V to
1.8V
25A × 2
LTM4650A 4.5V to 0.6V to
LTM4650A-1 16V
5.5V
COMPEN-
SATION
Internal
External
Internal
External
ACDCCUVROAUCTY
1.5%
0.8%
1%
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule, Burst Mode, PolyPhase and
LTpowerCAD are registered trademarks of Analog Devices, Inc. All other trademarks are the
property of their respective owners. Protected by U.S. Patents, including 5481178, 5705919,
5929620, 6100678, 6144194, 6177787, 6304066 and 6580258. Other patents pending.
Typical Application
50A, 3.3V Output DC/DC µModule Regulator
INTVCC
VIN
4.5V TO 16V
22µF
25V
×4
4.7µF
120k
0.1µF
INTVCC
PINS NOT USED IN
THIS CIRCUIT:
CLKOUT
EXTVCC
SW1
SW2
VOUTS2
10k
PGOOD
INTVCC
VIN
TEMP
TRACK1
TRACK2
fSET
COMP1
COMP2
RUN1
RUN2
PHASMD
SGND
PGOOD1
LTM4650A
PGOOD2
VOUT1
VOUTS1
DIFFOUT
VFB1
VFB2
GND
VOUT2
DIFFP
DIFFN
MODE_PLLIN
4650A TA01a
100µF +
6.3V
470µF
6.3V
13.3k
100µF
6.3V
+
VOUT
3.3V/50A
470µF
6.3V
For more information www.linear.com/LTM4650A
3.3VOUT Efficiency vs IOUT
100
95
90
85
80
75
70 12 VIN, 3.3VOUT, 600kHz
5 VIN, 3.3VOUT, 600kHz
65
0 10 20 30 40 50
LOAD CURRENT (A)
4650A TA01b
4650af
1

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LTM4650A equivalent
Electrical Characteristics
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTM4650A is tested under pulsed load conditions such that
TJ ≈ TA. The LTM4650AE is guaranteed to meet specifications from
0°C to 125°C internal temperature. Specifications over the –40°C to
125°C internal operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTM4650AI is guaranteed over the full –40°C to 125°C internal operating
temperature range. Note that the maximum ambient temperature
consistent with these specifications is determined by specific operating
conditions in conjunction with board layout, the rated package thermal
impedance and other environmental factors.
LTM4650A
Note 3: Two outputs are tested separately and the same testing condition
is applied to each output.
Note 4: The switching frequency is programmable from 250kHz to 780kHz.
Note 5: LTM4650A device is designed to operate from 250kHz to 780kHz
Note 6: These parameters are tested at wafer sort.
Note 7: See output current derating curve for different ambient
temperature.
Note 8: Total DC output voltage error includes all errors over
temperature – reference, line and load regulation as well as the tolerance
of the integrated top feedback resistor.
For more information www.linear.com/LTM4650A
4650af
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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LTM4650A electronic component.


Information Total 30 Pages
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Featured Datasheets

Part NumberDescriptionMFRS
LTM4650The function is Dual 25A or Single 50A DC/DC uModule Regulator. Linear TechnologyLinear Technology
LTM4650-1The function is Dual 25A or Single 50A uModule Regulator. Linear TechnologyLinear Technology
LTM4650AThe function is Dual 25A or Single 50A DC/DC uModule Regulator. Linear TechnologyLinear Technology

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