Datasheet LTM4622 (Analog Devices)
| 制造商 | Analog Devices |
| 描述 | Dual Ultrathin 2.5A or Single 5A Step-Down DC/DC μModule Regulator |
| 页数 / 页 | 28 / 1 — FEATURES. DESCRIPTION. Complete Solution in <1cm2. Wide Input Voltage … |
| 修订版 | H |
| 文件格式/大小 | PDF / 1.8 Mb |
| 文件语言 | 英语 |
FEATURES. DESCRIPTION. Complete Solution in <1cm2. Wide Input Voltage Range: 3.6V to 20V
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LTM4622 Dual Ultrathin 2.5A or Single 5A Step-Down DC/DC µModule Regulator
FEATURES DESCRIPTION
n
Complete Solution in <1cm2
The LTM®4622 is a complete dual 2.5A step-down switch- n
Wide Input Voltage Range: 3.6V to 20V
ing mode µModule® (powermodule) regulator in a tiny n
3.3V Input Compatible with VIN Tied to INTVCC
ultrathin 6.25mm × 6.25mm × 1.82mm LGA and 6.25mm n
0.6V to 5.5V Output Voltage
× 6.25mm × 2.42mm BGA packages. Included in the pack- n
Dual 2.5A (3A Peak) or Single 5A Output Current
age are the switching controller, power FETs, inductor and n
±1.5% Maximum Total Output Voltage Regulation
support components. Operating over an input voltage
Error Over Load, Line and Temperature
range of 3.6V to 20V, the LTM4622 supports an output n Current Mode Control, Fast Transient Response voltage range of 0.6V to 5.5V, set by a single external n External Frequency Synchronization resistor. Its high efficiency design delivers dual 2.5A con- n Multiphase Parallelable with Current Sharing tinuous, 3A peak, output current. Only a few ceramic input n Output Voltage Tracking and Soft-Start Capability and output capacitors are needed. n Selectable Burst Mode® Operation The LTM4622 supports selectable Burst Mode operation n Overvoltage Input and Overtemperature Protection and output voltage tracking for supply rail sequencing. n Power Good Indicators Its high switching frequency and current mode control n 6.25mm × 6.25mm × 1.82mm LGA and 6.25mm × enable a very fast transient response to line and load 6.25mm × 2.42mm BGA Packages changes without sacrificing stability. Fault protection features include input overvoltage, output
APPLICATIONS
overcurrent and overtemperature protection. n General Purpose Point-of-Load Conversion The LTM4622 is available with SnPb (BGA) or RoHS com- n Telecom, Networking and Industrial Equipment pliant terminal finish. n Medical Diagnostic Equipment All registered trademarks and trademarks are the property of their respective owners. n Test and Debug Systems
TYPICAL APPLICATION 1.5V and 1V Dual Output DC/DC Step-Down µModule Regulator 1.5V Output Efficiency vs Load Current
95 PGOOD1 PGOOD2 90 VOUT1 V V IN1 OUT1 V 1V, 2.5A IN 47µF 85 3.6V TO 20V VIN2 4.7µF LTM4622 25V RUN1 80 VOUT2 VOUT2 RUN2 1.5V, 2.5A 47µF 75 INTV COMP1 CC EFFICIENCY (%) SYNC/MODE COMP2 70 TRACK/SS1 FB1 65 VIN = 5V TRACK/SS2 FB2 VIN = 12V 90.9k 60 FREQ 40.2k 0 0.5 1.0 1.5 2.0 2.5 3 GND 4622 TA01a LOAD CURRENT (A) 4622 TA01b Rev. H Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Safety Considerations Layout Checklist/Example Package Description Revision History Package Photo Design Resources Related Parts
FEATURES DESCRIPTION
n
Complete Solution in <1cm2
The LTM®4622 is a complete dual 2.5A step-down switch- n
Wide Input Voltage Range: 3.6V to 20V
ing mode µModule® (powermodule) regulator in a tiny n
3.3V Input Compatible with VIN Tied to INTVCC
ultrathin 6.25mm × 6.25mm × 1.82mm LGA and 6.25mm n
0.6V to 5.5V Output Voltage
× 6.25mm × 2.42mm BGA packages. Included in the pack- n
Dual 2.5A (3A Peak) or Single 5A Output Current
age are the switching controller, power FETs, inductor and n
±1.5% Maximum Total Output Voltage Regulation
support components. Operating over an input voltage
Error Over Load, Line and Temperature
range of 3.6V to 20V, the LTM4622 supports an output n Current Mode Control, Fast Transient Response voltage range of 0.6V to 5.5V, set by a single external n External Frequency Synchronization resistor. Its high efficiency design delivers dual 2.5A con- n Multiphase Parallelable with Current Sharing tinuous, 3A peak, output current. Only a few ceramic input n Output Voltage Tracking and Soft-Start Capability and output capacitors are needed. n Selectable Burst Mode® Operation The LTM4622 supports selectable Burst Mode operation n Overvoltage Input and Overtemperature Protection and output voltage tracking for supply rail sequencing. n Power Good Indicators Its high switching frequency and current mode control n 6.25mm × 6.25mm × 1.82mm LGA and 6.25mm × enable a very fast transient response to line and load 6.25mm × 2.42mm BGA Packages changes without sacrificing stability. Fault protection features include input overvoltage, output
APPLICATIONS
overcurrent and overtemperature protection. n General Purpose Point-of-Load Conversion The LTM4622 is available with SnPb (BGA) or RoHS com- n Telecom, Networking and Industrial Equipment pliant terminal finish. n Medical Diagnostic Equipment All registered trademarks and trademarks are the property of their respective owners. n Test and Debug Systems
TYPICAL APPLICATION 1.5V and 1V Dual Output DC/DC Step-Down µModule Regulator 1.5V Output Efficiency vs Load Current
95 PGOOD1 PGOOD2 90 VOUT1 V V IN1 OUT1 V 1V, 2.5A IN 47µF 85 3.6V TO 20V VIN2 4.7µF LTM4622 25V RUN1 80 VOUT2 VOUT2 RUN2 1.5V, 2.5A 47µF 75 INTV COMP1 CC EFFICIENCY (%) SYNC/MODE COMP2 70 TRACK/SS1 FB1 65 VIN = 5V TRACK/SS2 FB2 VIN = 12V 90.9k 60 FREQ 40.2k 0 0.5 1.0 1.5 2.0 2.5 3 GND 4622 TA01a LOAD CURRENT (A) 4622 TA01b Rev. H Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Safety Considerations Layout Checklist/Example Package Description Revision History Package Photo Design Resources Related Parts