Document
LTM4622 Dual Ultrathin 2.5A or Single 5A Step-Down DC/DC µModule Regulator
FEATURES
nn Complete Solution in <1cm2 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 (3A Peak) or Single 5A 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 and 6.25mm ×
6.25mm × 2.42mm BGA Packages
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 switching mode µModule® (powermodule) regulator in a tiny ultrathin 6.25mm × 6.25mm × 1.82mm LGA and 6.25mm × 6.25mm × 2.42mm BGA packages. 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 supports 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 available with SnPb (BGA) or RoHS compliant terminal finish.
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
1.5V and 1V Dual Output DC/DC Step-Down µModule Regulator
VIN 3.6V TO 20V
4.7µF 25V
PGOOD1 VIN1
PGOOD2 VOUT1
VIN2 RUN1 RUN2
LTM4622
VOUT2
INTVCC SYNC/MODE
COMP1 COMP2
TRACK/SS1
FB1
TRACK/SS2
FB2
FREQ
GND
4622 TA01a
VOUT1 1V, 2.5A 47µF
VOUT2 47µF 1.5V, 2.5A
90.9k 40.2k
Document Feedback
For more information www.analog.com
EFFICIENCY (%)
1.5V Output Efficiency vs Load Current
95
90
85
80
75
70
65 VIN = 5V 60 VIN = 12V
0 0.5 1.0 1.5 2.0 2.5 3 LOAD CURRENT (A)
4622 TA01b
Rev. G
1
LTM4622
ABSOLUTE MAXIMUM RATINGS (Note 1)
VIN1, VIN2.................................................... –0.3V to 22V VOUT.............................................................. –0.3V to 6V PGOOD1, PGOOD2...................................... –0.3V to 18V RUN1, RUN2..................................... –0.3V to VIN + 0.3V INTVCC, TRACK/SS1, TRACK/SS2............. –0.3V to 3.6V SYNC/MODE, COMP1, COMP2, FB1, FB2............................