LTM4622_15 Datasheet, PDF (1/26 Pages) Linear Technology – Dual Ultrathin 2.5A Step-Down DC/DC Module Regulator

LTM4622
Dual Ultrathin 2.5A
Step-Down DC/DC µModule Regulator
FEATURES
nn _{Complete Solution in <1cm}²
nn _{Wide Input Voltage Range: 3.6V to 20V}
nn _{3.3V Input Compatible with VIN Tied to INTVCC}
nn _{0.6V to 5.5V Output Voltage}
nn _{Dual 2.5A DC, 3A Peak Output Current}
nn _{±1.5% Maximum Total Output Voltage Regulation}
Error Over Load, Line and Temperature
nn _{Current Mode Control, Fast Transient Response}
nn _{External Frequency Synchronization}
nn _{Multiphase Parallelable with Current Sharing}
nn _{Output Voltage Tracking and Soft-Start Capability}
nn _{Selectable Burst Mode}^® _Operation
nn _{Overvoltage Input and Overtemperature Protection}
nn _{Power Good Indicators}
nn _{6.25mm × 6.25mm × 1.82mm LGA Package}
APPLICATIONS
nn _{General Purpose Point of Load Conversion}
nn _{Telecom, Networking and Industrial Equipment}
nn _{Medical Diagnostic Equipment}
nn _{Test and Debug Systems}
DESCRIPTION
The LTM^®4622 is a complete dual 2.5A step-down switch-
ing mode µModule^® (micromodule) regulator in a tiny
ultrathin 6.25mm × 6.25mm × 1.82mm LGA package.
Included in the package are the switching controller, power
FETs, inductor and support components. Operating over
an input voltage range of 3.6V to 20V, the LTM4622 sup-
ports an output voltage range of 0.6V to 5.5V, set by a
single external resistor. Its high efficiency design delivers
dual 2.5A continuous, 3A peak, output current. Only a few
ceramic input and output capacitors are needed.
The LTM4622 supports selectable Burst Mode operation
and output voltage tracking for supply rail sequencing. Its
high switching frequency and current mode control enable
a very fast transient response to line and load changes
without sacrificing stability.
Fault protection features include input overvoltage, output
overcurrent and overtemperature protection.
The LTM4622 is RoHS compliant with Pb-free finish.
L, LT, LTC, LTM, µModule, Burst Mode, PolyPhase, Linear Technology and the Linear logo are
registered trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All
other trademarks are the property of their respective owners.
TYPICAL APPLICATION
1.5V and 1V Dual Output DC/DC Step-Down µModule Regulator
V_IN
3.6V TO 20V
4.7µF
25V
PGOOD1 PGOOD2
V_IN
V_OUT1
RUN1
RUN2 _LTM4622 ^VOUT2
INTV_CC
COMP1
SYNC/MODE
COMP2
TRACK/SS1
FB1
TRACK/SS2
FB2
FREQ
GND
V_OUT1
1V, 2.5A
47µF
47µF
V_OUT2
1.5V, 2.5A
40.2k 90.9k
4622 TA01a
1.5V Output Efficiency vs Load Current
95
90
85
80
75
70
65
V_IN = 5V
V_IN = 12V
60
0 0.5 1.0 1.5 2.0 2.5 3
LOAD CURRENT (A)
4622 TA01b
4622f
For more information www.linear.com/LTM4622
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