Datasheet LTM4657 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 20VIN, 8A Step-Down DC/DC µModule Regulator |
| Pages / Page | 28 / 1 — FEATURES. DESCRIPTION. Complete Solution in <1cm2 (Single-Sided PCB) … |
| File Format / Size | PDF / 2.0 Mb |
| Document Language | English |
FEATURES. DESCRIPTION. Complete Solution in <1cm2 (Single-Sided PCB) or. 0.5cm2 (Dual-Sided PCB)
Model Line for this Datasheet
Text Version of Document
LTM4657 20VIN, 8A Step-Down DC/DC µModule Regulator
FEATURES DESCRIPTION
n
Complete Solution in <1cm2 (Single-Sided PCB) or
The LTM®4657 is a complete 8A step-down switching
0.5cm2 (Dual-Sided PCB)
mode µModule (micromodule) regulator in a tiny 6.25mm n
6.25mm × 6.25mm × 3.87mm BGA Package
× 6.25mm × 3.87mm BGA package. Included in the pack- n Wide Input Voltage Range: 3.1V to 20V age are the switching controller, power FETs, inductor and n 0.5V to 5.5V Output Voltage support components. Operating over an input voltage n 8A DC Output Current range of 3.1V to 20V, the LTM4657 supports an output n ±1.5% Maximum Total DC Output Voltage Error voltage range of 0.5V to 5.5V, set by a single external Over Line, Load and Temperature resistor. Its high efficiency design delivers up to 8A con- n Differential Remote Sensing Amp tinuous output current. Only bulk input and output capaci- n Current Mode Control, Fast Transient Response tors are needed. n External Frequency Synchronization n The LTM4657 supports selectable discontinuous mode Multiphase Parallel Current Sharing with operation and output voltage tracking for supply rail Multiple LTM4657s n sequencing. Its high switching frequency and current Output Voltage Tracking n mode control enable a very fast transient response to Selectable Discontinuous Mode n line and load changes without sacrificing stability. Power Good Indicator n Overvoltage, Overcurrent and Overtemperature Fault protection features include overvoltage, overcurrent Protection and overtemperature protection. n Pin Compatible with LTM4626(12A) and LTM4638(15A) The LTM4657 is available with SnPb or RoHS compliant terminal finish.
APPLICATIONS
All registered trademarks and trademarks are the property of their respective owners. n Telecom, Datacom, Networking and Industrial Equipment n Medical Diagnostic Equipment n Data Storage Rack Units and Cards n Test and Debug Systems
TYPICAL APPLICATION Efficiency vs Load Current for VOUT = 1V 8A, 1.0V Output DC/DC µModule
®
Step-Down Regulator
95 500kHz 90 FREQ CLKOUT V VOUT IN VIN VOUT 3.1V TO 20V 1.0V 8A 85 RUN V + 10µF 100µF OSNS LTM4657 x2 INTVCC PGOOD 80 MODE/CLKIN COMPa TRACK/SS COMPb EFFICIENCY (%) 75 0.1µF PHMODE FB 60.4k 70 12VIN GND V – OSNS 5VIN 65 0 1 2 3 4 5 6 7 8 4657 TA01a OUTPUT LOAD CURRENT (A) 4657 TA01b Rev 0 Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Package Description Package Photo Design Resources Related Parts
FEATURES DESCRIPTION
n
Complete Solution in <1cm2 (Single-Sided PCB) or
The LTM®4657 is a complete 8A step-down switching
0.5cm2 (Dual-Sided PCB)
mode µModule (micromodule) regulator in a tiny 6.25mm n
6.25mm × 6.25mm × 3.87mm BGA Package
× 6.25mm × 3.87mm BGA package. Included in the pack- n Wide Input Voltage Range: 3.1V to 20V age are the switching controller, power FETs, inductor and n 0.5V to 5.5V Output Voltage support components. Operating over an input voltage n 8A DC Output Current range of 3.1V to 20V, the LTM4657 supports an output n ±1.5% Maximum Total DC Output Voltage Error voltage range of 0.5V to 5.5V, set by a single external Over Line, Load and Temperature resistor. Its high efficiency design delivers up to 8A con- n Differential Remote Sensing Amp tinuous output current. Only bulk input and output capaci- n Current Mode Control, Fast Transient Response tors are needed. n External Frequency Synchronization n The LTM4657 supports selectable discontinuous mode Multiphase Parallel Current Sharing with operation and output voltage tracking for supply rail Multiple LTM4657s n sequencing. Its high switching frequency and current Output Voltage Tracking n mode control enable a very fast transient response to Selectable Discontinuous Mode n line and load changes without sacrificing stability. Power Good Indicator n Overvoltage, Overcurrent and Overtemperature Fault protection features include overvoltage, overcurrent Protection and overtemperature protection. n Pin Compatible with LTM4626(12A) and LTM4638(15A) The LTM4657 is available with SnPb or RoHS compliant terminal finish.
APPLICATIONS
All registered trademarks and trademarks are the property of their respective owners. n Telecom, Datacom, Networking and Industrial Equipment n Medical Diagnostic Equipment n Data Storage Rack Units and Cards n Test and Debug Systems
TYPICAL APPLICATION Efficiency vs Load Current for VOUT = 1V 8A, 1.0V Output DC/DC µModule
®
Step-Down Regulator
95 500kHz 90 FREQ CLKOUT V VOUT IN VIN VOUT 3.1V TO 20V 1.0V 8A 85 RUN V + 10µF 100µF OSNS LTM4657 x2 INTVCC PGOOD 80 MODE/CLKIN COMPa TRACK/SS COMPb EFFICIENCY (%) 75 0.1µF PHMODE FB 60.4k 70 12VIN GND V – OSNS 5VIN 65 0 1 2 3 4 5 6 7 8 4657 TA01a OUTPUT LOAD CURRENT (A) 4657 TA01b Rev 0 Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Package Description Package Photo Design Resources Related Parts
