LTM4633_15 Datasheet, PDF (1/32 Pages) Linear Technology – Triple 10A Step-Down DC/DC Module Regulator

LTM4633
Triple 10A Step-Down
DC/DC µModule Regulator
Features
Description
n _{Three Independent 10A DC Output Current Regulator}
Channels
n _{Input Voltage Range: 4.7V to 16V}
n _{2.375V to 16V with External 5V Bias}
n _{VOUT1,2 Voltage Range: 0.8V to 1.8V}
n _{VOUT3 Voltage Range: 0.8V to 5.5V}
n _{±1.5% Maximum Total DC Output Error}
n _{Current Mode Control/Fast Transient Response}
n _{Frequency Synchronization}
n _{Output Overvoltage and Overcurrent Protection}
n _{Multiphase Operation with Current Sharing}
on V_OUT1 and V_OUT2
n _{General Purpose Temperature Monitors}
n _{Soft-Start/Voltage Tracking}
n _{Power Good Monitors}
n _{15mm × 15mm × 5.01mm BGA Package}
Applications
n _{Telecom, Networking and Industrial Equipment}
n _{High Density Point of Load Regulation}
The LTM^®4633 µModule^® (micromodule) regulator com-
bines three complete 10A switching mode DC/DC con-
verters into one small package. Included in the package
are the switching controllers, power FETs, inductors, and
most support components. The LTM4633’s three regula-
tors operate from 4.7V to 16V input rail(s) or 2.375V to
16V with an external 5V bias. The V_OUT1 and V_OUT2 output
range is 0.8V to 1.8V, while the V_OUT3 output range is 0.8V
to 5.5V. Each output is set by one external resistor.
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, multiphase parallel operation
of V_OUT1 and V_OUT2, soft-start and output voltage tracking
for supply rail sequencing.
Fault protection features include overvoltage protection,
overcurrent protection and temperature monitoring. The
power module is offered in a space saving, thermally
enhanced 15mm × 15mm × 5.01mm BGA package. The
LTM4633 is RoHS compliant with Pb-free finish.
L, LT, LTC, LTM, µModule, PolyPhase, Burst Mode, Linear Technology and the Linear logo are
registered trademarks and PowerPath and LTpowerCAD are 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,
6580258 and 8163643. Other patents pending.
Typical Application
12V Input to 1.0V, 1.5V and 3.3V Output Regulator
12V_IN
13.3k
V_IN1 V_IN2 V_IN3
CNTL_PWR
RUN1
RUN2
RUN3
TK/SS1
TK/SS2
TK/SS3
EXTV_CC
INTV_CC FREQ/PLLLPF
PGOOD12
PGOOD3
V_OUT1
LTM4633
V_FB1
V_OUT2
V_FB2
10k
242k
69.8k
MODE/PLLIN GND SGND
V_OUT3
V_FB3
19.1k
4633 TA01a
10k
4.7µF
6.3V
1.0V
10A
1.5V
10A
3.3V
10A
For more information www.linear.com/LTM4633
Efficiency vs Load Current
95
90
85
80
75
12V_IN, 3.3V OUTPUT
12V_IN, 1.5V OUTPUT
12V_IN, 1V OUTPUT
70
0 1 2 3 4 5 6 7 8 9 10
LOAD CURRENT (A)
4633 TA01b
4633f
1