Datasheet LTM4622A (Analog Devices)
| 制造商 | Analog Devices |
| 描述 | Dual Ultrathin 2A or Single 4A Step-Down DC/DC μModule Regulator |
| 页数 / 页 | 30 / 1 — FEATURES. DESCRIPTION. Complete Solution in <1cm2. Wide Input Voltage … |
| 修订版 | B |
| 文件格式/大小 | PDF / 878 Kb |
| 文件语言 | 英语 |
FEATURES. DESCRIPTION. Complete Solution in <1cm2. Wide Input Voltage Range: 3.6V to 20V. 1.5V to 12V Output Voltage
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LTM4622A Dual Ultrathin 2A or Single 4A Step-Down DC/DC µModule Regulator
FEATURES DESCRIPTION
n
Complete Solution in <1cm2
The LTM®4622A is a complete dual 2A step-down switching n
Wide Input Voltage Range: 3.6V to 20V
mode µModule® (micromodule) regulator in a tiny ultrathin n
1.5V to 12V Output Voltage
6.25mm × 6.25mm × 1.82mm LGA and 2.42mm BGA pack- n
Dual 2A (3A Peak) or Single 4A Output Current
ages. Included in the package are the switching controller, n
±1.5% Maximum Total Output Voltage Regulation
power FETs, inductor and support components. Operating
Error Over Load, Line and Temperature
over an input voltage range of 3.6V to 20V, the LTM4622A n Current Mode Control, Fast Transient Response supports an output voltage range of 1.5V to 12V, set by a n External Frequency Synchronization single external resistor. Its high efficiency design delivers n Multiphase Parallelable with Current Sharing dual 2A continuous, 3A peak, output current. Only a few n Output Voltage Tracking and Soft-Start Capability ceramic input and output capacitors are needed. n Selectable Burst Mode® Operation The LTM4622A supports selectable Burst Mode operation n Overvoltage Input and Overtemperature Protection and output voltage tracking for supply rail sequencing. Its n Power Good Indicators high switching frequency and current mode control enable n 6.25mm × 6.25mm × 1.82mm LGA and a very fast transient response to line and load changes 6.25mm × 6.25mm × 2.42mm BGA Packages without sacrificing stability. Fault protection features include input overvoltage, output
APPLICATIONS
overcurrent and overtemperature protection. n General Purpose Point-of-Load Conversion The LTM4622A is available with SnPb (BGA) or RoHS n Telecom, Networking and Industrial Equipment compliant terminal finish. n Medical Diagnostic Equipment
Product Selection Guide
n Test and Debug Systems
PART NUMBER VIN RANGE VOUT RANGE IOUT
All registered trademarks and trademarks are the property of their respective owners. LTM4622 0.6V to 5.5V Dual 2.5A or Single 5A 3.6V to 20V LTM4622A 1.5V to 12V Dual 2A or Single 4A
TYPICAL APPLICATION 12V Input, 3.3V and 5V Output, 3.3V and 5V Dual Output DC/DC Step-Down µModule Regulator Efficiency vs Load Current
100 PGOOD1 PGOOD2 VOUT1 V V IN1 OUT1 95 V 3.3V, 2A IN 47µF 8V TO 20V VIN2 4.7µF LTM4622A 90 25V RUN1 VOUT2 VOUT2 RUN2 5V, 2A 47µF 85 INTV COMP1 CC SYNC/MODE COMP2 EFFICIENCY (%) 80 TRACK/SS1 FB1 75 TRACK/SS2 FB2 VOUT = 5V 13.3k VOUT = 3.3V FREQ 8.25k 70 GND 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2.0 4622A TA01a LOAD CURRENT (A) 4622A TA01b Rev B 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 Package Photos Design Resources Related Parts
FEATURES DESCRIPTION
n
Complete Solution in <1cm2
The LTM®4622A is a complete dual 2A step-down switching n
Wide Input Voltage Range: 3.6V to 20V
mode µModule® (micromodule) regulator in a tiny ultrathin n
1.5V to 12V Output Voltage
6.25mm × 6.25mm × 1.82mm LGA and 2.42mm BGA pack- n
Dual 2A (3A Peak) or Single 4A Output Current
ages. Included in the package are the switching controller, n
±1.5% Maximum Total Output Voltage Regulation
power FETs, inductor and support components. Operating
Error Over Load, Line and Temperature
over an input voltage range of 3.6V to 20V, the LTM4622A n Current Mode Control, Fast Transient Response supports an output voltage range of 1.5V to 12V, set by a n External Frequency Synchronization single external resistor. Its high efficiency design delivers n Multiphase Parallelable with Current Sharing dual 2A continuous, 3A peak, output current. Only a few n Output Voltage Tracking and Soft-Start Capability ceramic input and output capacitors are needed. n Selectable Burst Mode® Operation The LTM4622A supports selectable Burst Mode operation n Overvoltage Input and Overtemperature Protection and output voltage tracking for supply rail sequencing. Its n Power Good Indicators high switching frequency and current mode control enable n 6.25mm × 6.25mm × 1.82mm LGA and a very fast transient response to line and load changes 6.25mm × 6.25mm × 2.42mm BGA Packages without sacrificing stability. Fault protection features include input overvoltage, output
APPLICATIONS
overcurrent and overtemperature protection. n General Purpose Point-of-Load Conversion The LTM4622A is available with SnPb (BGA) or RoHS n Telecom, Networking and Industrial Equipment compliant terminal finish. n Medical Diagnostic Equipment
Product Selection Guide
n Test and Debug Systems
PART NUMBER VIN RANGE VOUT RANGE IOUT
All registered trademarks and trademarks are the property of their respective owners. LTM4622 0.6V to 5.5V Dual 2.5A or Single 5A 3.6V to 20V LTM4622A 1.5V to 12V Dual 2A or Single 4A
TYPICAL APPLICATION 12V Input, 3.3V and 5V Output, 3.3V and 5V Dual Output DC/DC Step-Down µModule Regulator Efficiency vs Load Current
100 PGOOD1 PGOOD2 VOUT1 V V IN1 OUT1 95 V 3.3V, 2A IN 47µF 8V TO 20V VIN2 4.7µF LTM4622A 90 25V RUN1 VOUT2 VOUT2 RUN2 5V, 2A 47µF 85 INTV COMP1 CC SYNC/MODE COMP2 EFFICIENCY (%) 80 TRACK/SS1 FB1 75 TRACK/SS2 FB2 VOUT = 5V 13.3k VOUT = 3.3V FREQ 8.25k 70 GND 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2.0 4622A TA01a LOAD CURRENT (A) 4622A TA01b Rev B 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 Package Photos Design Resources Related Parts