LTM4649_15 Datasheet, PDF (1/30 Pages) Linear Technology – 10A Step-Down DC/DC Module Regulator

LTM4649
10A Step-Down DC/DC
µModule Regulator
Features
n _{10A DC Output Current}
n _{Input Voltage Range: 4.5V to 16V}
n _{Output Voltage Range: 0.6V Up to 3.3V}
n _{No Heat Sink or Current Derating Up to 85°C}
Ambient Temperature
n _{±1.5% Total DC Voltage Output Error}
n _{Multiphase Operation with Current Sharing}
n _{Remote Sense Amplifier}
n _{Built-In General Use 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 _{9mm × 15mm × 4.92mm BGA Package}
Applications
n _{Telecom, Networking and Industrial Equipment}
n _{Point of Load Regulation}
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.
Description
The LTM^®4649 is a complete 10A high efficiency switching
mode step-down DC/DC µModule^® regulator in a 9mm ×
15mm × 4.92 BGA package. Included in the package are
the switching controller, power FETs, inductor, and all sup-
port components. Operating over an input voltage range
of 4.5V to 16V, the LTM4649 supports an output voltage
range of 0.6V to 3.3V, set by a single external resistor. This
high efficiency design delivers 10A continuous current.
Only bulk input and output capacitors are needed.
High switching frequency and a current mode architecture
enables a very fast transient response to line and load
changes without sacrificing stability. The device supports
frequency synchronization, programmable multiphase
operation, spread spectrum, output voltage tracking for
supply rail sequencing.
Fault protection features include overvoltage protection,
overcurrent protection. The LTM4649 is offered in a small
thermally enhanced 9mm × 15mm × 4.92mm BGA pack-
age. The LTM4649 is available with SnPb (BGA) or RoHS
compliant terminal finish.
Typical Application
4.5V to 16V Input, 1.5V Output DC/DC
µModule Regulator
V_IN
4.5V TO 16V
22µF
16V
×2
CLKIN
V_IN
INTV_CC
SW
FREQ
V_OUT
V_{OUT_LCL}
DIFFOUT
RUN _LTM4649 DIFFP
MODE
DIFFN
PHMODE
TRACK/SS
V_FB
COMP
TEMP
0.1µF GND
PGOOD
CLKOUT
100µF
6.3V
×2
V_OUT
1.5V
10A
6.65k
4649 TA01a
Efficiency and Power Loss
at 12V and 5V Input
95
3.0
90
2.5
85
2.0
80
1.5
75
1.0
70
65
0
0.5
V_IN = 12V
V_IN = 5V
0
2
4
6
8
10
LOAD CURRENT (A)
4649 TA01b
For more information www.linear.com/LTM4649
Current Derating: 12V Input,
1.5V_OUT, No Heat Sink
12
10
8
6
4
2
400LFM
200LFM
0LFM
0
0 20 40 60 80 100 120
AMBIENT TEMPERATURE (°C)
4649 TA01c
4649fa
1