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Linear Technology - 10A Step-Down uModule Regulator

Numéro de référence LTM4648
Description 10A Step-Down uModule Regulator
Fabricant Linear Technology 
Logo Linear Technology 





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LTM4648 fiche technique
LTM4648
Low VIN, 10A Step-Down
µModule Regulator
Features
n 10A DC Output Current
n Input Voltage Range: 2.375V to 5.5V
n Output Voltage Range: 0.6V to 5V
n No Heat Sink or Current Derating Up to 85°C
Ambient Temperature
n ±1.5% Maximum Total DC Output Error
n Multiphase Operation with Current Sharing
n Remote Sense Amplifier
n Built-In Temperature Monitor
n Selectable Pulse-Skipping Mode/Burst Mode®
Operation for High Efficiency at Light Load
n Soft-Start/Voltage Tracking
n Protection: Output Overvoltage and Overcurrent
Foldback
n See LTM4649 for Up to 16VIN Operation
n 9mm × 15mm × 4.92mm BGA Package
Applications
n Telecom, Networking and Industrial Equipment
n Point of Load Regulation
Description
The LTM®4648 is a 10A low VIN step-down
DC/DC µModule® (micromodule) regulator. Included in
the package are the switching controller, power FETs,
inductor and all support components. Operating over
an input voltage range of 2.375V to 5.5V, the LTM4648
supports an output voltage range of 0.6V to 5V, set by a
single external resistor. This high efficiency design delivers
up to 10A continuous current. Only bulk input and output
capacitors are needed.
High switching frequency and a current mode architecture
enable a very fast transient response to line and load
changes without sacrificing stability. The device supports
frequency synchronization, programmable multiphase
operation and output voltage tracking for supply rail
sequencing.
Fault protection features include overvoltage protec-
tion, overcurrent protection and thermal shutdown. The
LTM4648 is offered in a small 9mm × 15mm × 4.92mm
BGA package. The LTM4648 is RoHS compliant. For up
to 16VIN operation, see the LTM4649.
L, LT, LTC, LTM, Burst Mode, µModule, PolyPhase, Linear Technology and the Linear logo are
registered trademarks of Linear Technology Corporation. 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
2.375V to 5.5V Input, 1.5V Output DC/DC
µModule Regulator
VIN
2.375V TO 5.5V
PINS NOT USED
IN THIS CIRCUIT:
INTVCC
SW
RUN
PHMODE
TEMP
COMP
PGOOD
CLKIN
CLKOUT
22µF
10V
×2
VIN VOUT
DIFFP
DIFFN
LTM4648
MODE
VOUT_LCL
DIFFOUT
TRACK/SS
0.1µF
GND
VFB
100µF
6.3V
×2
VOUT
1.5V
10A
6.65k
4648 TA01a
Efficiency and Power Loss
at 5V and 3.3V Input
100 2.8
95 2.4
90 2.0
85 1.6
80 1.2
75 0.8
70 VIN = 3.3V 0.4
65 VIN = 5V 0
0 2 4 6 8 10
LOAD CURRENT (A)
4648 TA01b
For more information www.linear.com/LTM4648
Current Derating, 5V to 1.5VOUT
with No Heat Sink
12
10
8
6
4
2
400LFM
200LFM
0LFM
0
0 20 40 60 80 100 120
AMBIENT TEMPERATURE (°C)
4648 TA01c
4648f
1

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