LTM4620_15 Datasheet, PDF (1/40 Pages) Linear Technology – Dual 13A or Single 26A DC/DC Module Regulator

LTM4620
Dual 13A or Single 26A
DC/DC µModule Regulator
FEATURES
n _{Complete Standalone Dual Output Power Supply}
n _{Dual 13A or Single 26A Output}
n _{Wide Input Voltage Range: 4.5V to 16V}
n _{Output Voltage Range: 0.6V to 2.5V}
n _{±1.5% Maximum Total DC Output Error}
n _{Multiphase Current Sharing with Multiple}
LTM4620s Up to 100A
n _{Differential Remote Sense Amplifier}
n _{Current Mode Control/Fast Transient Response}
n _{Adjustable Switching Frequency}
n _{Overcurrent Foldback Protection}
n _{Frequency Synchronization}
n _{Internal Temperature Monitor}
n _{Output Overvoltage Protection}
n _{SnPb or RoHS Compliant Finish}
n _{Thermally Enhanced (15mm × 15mm × 4.41mm) LGA}
Package and (15mm × 15mm × 5.01mm) BGA Package
APPLICATIONS
n _{Telecom and Networking Equipment}
n _{Storage and ATCA Cards}
n _{Industrial Equipment}
DESCRIPTION
The LTM^®4620 is a complete dual 13A output switching
mode DC/DC power supply. Included in the package are
the switching controller, power FETs, inductors, and all
supporting components. Operating from an input voltage
range of 4.5V to 16V, the LTM4620 supports two outputs
each with an output voltage range of 0.6V to 2.5V, set by a
single external resistor. Its high efficiency design delivers
up to 13A continuous current for each output. Only a few
input and output capacitors are needed.
The device supports frequency synchronization, multi-
phase operation, Burst Mode operation and output voltage
tracking for supply rail sequencing and has an onboard
temperature diode for device temperature monitoring. High
switching frequency and a current mode architecture enable
a very fast transient response to line and load changes
without sacrificing stability.
Fault protection features include overvoltage and overcurrent
protection. The power module is offered in a proprietary space
saving and thermally enhanced 15mm × 15mm × 4.41mm
LGA package and 15mm × 15mm × 5.01mm BGA package,
with integrated top-side heat sink. The LTM4620 is avail-
able with SnPb (BGA) or RoHS compliant terminal finish.
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule, Burst Mode and PolyPhase are
registered trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All
other trademarks are the property of their respective owners.
Click to view associated TechClip Videos.
TYPICAL APPLICATION
26A, 1.2V Output DC/DC µModule^® Regulator
INTV_CC
4.7µF
5k
V_IN 4.5V TO 16V
10k*
22µF
×4
120k
25V
5.1V*
0.1µF
121k
* PULL-UP RESISTOR AND
ZENER ARE OPTIONAL
MODE_PLLIN CLKOUT INTV_CC
V_IN
TEMP
RUN1
RUN2
TRACK1
TRACK2
f_SET
PHASMD
LTM4620
SGND GND
DIFFP
EXTV_CC PGOOD1
V_OUT1
V_OUTS1
DIFFOUT
SW1
V_FB1
V_FB2
COMP1
COMP2
V_OUTS2
V_OUT2
SW2
PGOOD2
DIFFN
PGOOD
100µF ⁺
6.3V
60.4k
100µF ⁺
6.3V
PGOOD
470µF
6.3V
470µF
6.3V
V_OUT
1.2V AT 26A
4620 TA01a
For more information www.linear.com/LTM4620
1.2V Efficiency vs I_OUT
90
80
70
60
50
5V_IN /500kHz
12V_IN/500kHz
40
0 2 4 6 8 10 12 14 16 18 20 22 24 26
OUTPUT CURRENT (A)
4620 TA01b
4620fb
1