LTM4644_15 Datasheet, PDF (1/32 Pages) Linear Technology – Quad DC/DC Module Regulator with Configurable 4A Output Array

LTM4644
Quad DC/DC µModule
Regulator with Configurable
4A Output Array
FEATURES
DESCRIPTION
n _{Quad Output Step-Down µModule}^® _{Regulator with 4A}
per Output
n _{Wide Input Voltage Range: 4V to 14V}
n _{2.375V to 14V with External Bias}
n _{0.6V to 5.5V Output Voltage}
n _{4A DC, 5A Peak Output Current Each Channel}
n _{Up to 5.5W Power Dissipation (TA = 60°C, 200 LFM,}
No Heat Sink)
n _{±1.5% Total Output Voltage Regulation}
n _{Current Mode Control, Fast Transient Response}
n _{Parallelable for Higher Output Current}
n _{Output Voltage Tracking}
n _{Internal Temperature Sensing Diode Output}
n _{External Frequency Synchronization}
n _{Overvoltage, Current and Temperature Protection}
n _{9mm × 15mm × 5.01mm BGA Package}
APPLICATIONS
n _{Multirail Point of Load Regulation}
n _{FPGAs, DSPs and ASICs Applications}
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered
trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
The LTM^®4644 is a quad DC/DC step-down µModule (mi-
cromodule) regulator with 4A per output. Outputs can be
paralleled in an array for up to 16A capability. Included
in the package are the switching controllers, power FETs,
inductors and support components. Operating over an
input voltage range of 4V to 14V or 2.375V to 14V with
an external bias supply, the LTM4644 supports an output
voltage range of 0.6V to 5.5V each set by a single external
resistor. Its high efficiency design delivers 4A continuous
(5A peak) output current per channel. Only bulk input and
output capacitors are needed.
Fault protection features include overvoltage, overcurrent
and overtemperature protection. The LTM4644 is offered
in 9mm ×15mm × 5.01mm BGA package. The LTM4644
is available with SnPb (BGA) or RoHS compliant terminal
finish.
Configurable Output Array*
4A
4A
8A
12A
4A
4A
16A
4A
4A
4A
* Note 4
Click to view associated TechClip Videos.
TYPICAL APPLICATION
4V to 14V Input, Quad 0.9V, 1V, 1.2V and
1.5V Output DC/DC µModule Regulator*
4V to 14V
22µF
×2
16V
CLKIN
V_IN1
SVIN1
CLKOUT
V_OUT1
FB1
RUN1
PGOOD1
LTM4644
V_IN2
SVIN2
V_OUT2
FB2
RUN2
PGOOD2
40.2k
60.4k
1.5V/4A
47µF
4V
1.2V/4A
47µF
4V
V_IN3
SVIN3
RUN3
V_OUT3
FB3
PGOOD3
90.9k
1V/4A
47µF
4V
V_IN4
SVIN4
RUN4
TEMP SGND
V_OUT4
FB4
PGOOD4
GND
4644 TA01a
0.9V/4A
47µF
121k
4V
*T_A = 60°C, 200LFM, NO HEAT SINK
For more information www.linear.com/LTM4644
1.5V Output Efficiency and
Power Loss (Each Channel)
95
2
90
85
1.5
80
75
1
70
65
0.5
60
55
0
V_IN = 5V
V_IN = 12V
0
1
2
3
4
LOAD CURRENT (A)
4644 TA01b
4644fb
1