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LTM4650A-1 fiches techniques PDF

Linear Technology - Dual 25A or Single 50A DC/DC uModule Regulator

Numéro de référence LTM4650A-1
Description Dual 25A or Single 50A DC/DC uModule Regulator
Fabricant Linear Technology 
Logo Linear Technology 





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LTM4650A-1 fiche technique
FEATURES
LTM4650A-1
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 Adjustable Control Loop Compensation
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-1 is a dual 25A or single 50A output
switching mode step-down DC/DC µModule® (micromod-
ule) regulator with ±1% total DC output error. Included in
the package are the switching controllers, power FETs,
inductors and all supporting components. Operating from
an input voltage range of 4.5V to 16V, the LTM4650A-1
supports two outputs with an output voltage range of 0.6V
to 5.5V, each set by a single external resistor. Its high ef-
ficiency design delivers up to 25A continuous current for
each output. Only a few input and output capacitors are
needed. Adjustable control loop compensation allows for
fast transient response to minimize output capacitance
when powering FPGAs, ASICs, and processors.
Fault protection features include overvoltage and overcur-
rent protection. The LTM4650A-1 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
PINS UNUSED IN
THIS APPLICATION:
CLKOUT
EXTVCC
SW1
SW2
VOUTS2
INTVCC
RTH
CTH
10k
PGOOD
INTVCC
VIN
TEMP
TRACK1
TRACK2
fSET
COMP1
PGOOD1
LTM4650A-1
PGOOD2
VOUT1
VOUTS1
DIFFOUT
VFB1
VFB2
COMP2
RUN1
RUN2
PHASMD
SGND
VOUT2
DIFFP
DIFFN
GND MODE_PLLIN
4650a1 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-1
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)
4650a1 TA01b
4650a1f
1

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