Datasheet LTM4647 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | 30A DC/DC Step-Down μModule Regulator |
| Páginas / Página | 34 / 1 — FEATURES. DESCRIPTION. 4.7V to 15V Input Voltage Range. 0.6V to 1.8V … |
| Formato / tamaño de archivo | PDF / 1.1 Mb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTION. 4.7V to 15V Input Voltage Range. 0.6V to 1.8V Output Voltage Range. 30A DC Output Current
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LTM4647 30A DC/DC Step-Down µModule Regulator
FEATURES DESCRIPTION
n
4.7V to 15V Input Voltage Range
The LTM®4647 is a complete 30A output switching mode n
0.6V to 1.8V Output Voltage Range
step-down DC/DC µModule® (power module) regulator. n
30A DC Output Current
Included in the package are the switching controller, power n
±1.2% Total DC Output Voltage Error (–40°C to 125°C)
FETs, inductor and all supporting components. Operating n
High Reliability N + 1 Phase Redundancy Supported
over an input voltage range of 4.7V to 15V, the LTM4647 n
Internal or External Control Loop Compensation
supports an output voltage range of 0.6V to 1.8V, set by n
Differential Remote Sense Amplifier for Precision
a single external resistor. Only a few input and output
Regulation
capacitors are needed. n
Current Mode Control/Fast Transient Response
Its high efficiency design delivers 87% efficiency from 12V n
Multiphase Current Sharing Up to 180A
input to 1.0V output with 30A continuous load current. n
Built-In Temperature Monitoring
High switching frequency and a current mode architecture n Selectable Pulse-Skipping, Burst Mode® Operation enable a very fast transient response to line and load n Soft-Start/Voltage Tracking changes without sacrificing stability. The device supports n Frequency Synchronization frequency synchronization, programmable multiphase n Output Overvoltage Protection operation, N+1 phase redundancy, and output voltage n Output Overcurrent Foldback Protection tracking for supply rail sequencing. n 9mm × 15mm × 5.01mm BGA Package Fault protection features include overvoltage and overcur- rent protection. The power module is offered in a space
APPLICATIONS
saving 9mm × 15mm × 5.01mm BGA package. The n Telecom, Networking and Industrial Equipment LTM4647 is available with SnPb (BGA) or RoHS compli- n Point-of-Load Regulation ant terminal finish. L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, µModule, LTpowerCAD and PolyPhase are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION 12VIN, 1VOUT, 30A DC/DC µModule Regulator 1VOUT Efficiency vs Load Current
100 4.7µF 1µF 6.3V 2.2Ω 95 SVIN V DRVCC INTVCC IN V 90 IN 6V TO 15V 22µF 25V HIZB 85 ×2 FREQ LTM4647 VOUT VOUT 1V 80 43.2k COMPa V 30A OSNS+ 47pF EFFICIENCY (%) COMPb VFB 75 100µF TRACK/SS VOSNS– 90.9k 6.3V 0.1µF ×6 70 5V INPUT* SGND GND 12V INPUT 4647 TA01a 65 PINS NOT USED IN THIS CIRCUIT: 0 5 10 15 20 25 30 CLKOUT, MODE/PLLIN, PGOOD, LOAD CURRENT (A) PHASMD, PWM, RUN, SW, TEMP+, TEMP– *5V INPUT SEE FIGURE 24 4647 TA01b 4647fb For more information www.linear.com/LTM4647 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Typical Applications
FEATURES DESCRIPTION
n
4.7V to 15V Input Voltage Range
The LTM®4647 is a complete 30A output switching mode n
0.6V to 1.8V Output Voltage Range
step-down DC/DC µModule® (power module) regulator. n
30A DC Output Current
Included in the package are the switching controller, power n
±1.2% Total DC Output Voltage Error (–40°C to 125°C)
FETs, inductor and all supporting components. Operating n
High Reliability N + 1 Phase Redundancy Supported
over an input voltage range of 4.7V to 15V, the LTM4647 n
Internal or External Control Loop Compensation
supports an output voltage range of 0.6V to 1.8V, set by n
Differential Remote Sense Amplifier for Precision
a single external resistor. Only a few input and output
Regulation
capacitors are needed. n
Current Mode Control/Fast Transient Response
Its high efficiency design delivers 87% efficiency from 12V n
Multiphase Current Sharing Up to 180A
input to 1.0V output with 30A continuous load current. n
Built-In Temperature Monitoring
High switching frequency and a current mode architecture n Selectable Pulse-Skipping, Burst Mode® Operation enable a very fast transient response to line and load n Soft-Start/Voltage Tracking changes without sacrificing stability. The device supports n Frequency Synchronization frequency synchronization, programmable multiphase n Output Overvoltage Protection operation, N+1 phase redundancy, and output voltage n Output Overcurrent Foldback Protection tracking for supply rail sequencing. n 9mm × 15mm × 5.01mm BGA Package Fault protection features include overvoltage and overcur- rent protection. The power module is offered in a space
APPLICATIONS
saving 9mm × 15mm × 5.01mm BGA package. The n Telecom, Networking and Industrial Equipment LTM4647 is available with SnPb (BGA) or RoHS compli- n Point-of-Load Regulation ant terminal finish. L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, µModule, LTpowerCAD and PolyPhase are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION 12VIN, 1VOUT, 30A DC/DC µModule Regulator 1VOUT Efficiency vs Load Current
100 4.7µF 1µF 6.3V 2.2Ω 95 SVIN V DRVCC INTVCC IN V 90 IN 6V TO 15V 22µF 25V HIZB 85 ×2 FREQ LTM4647 VOUT VOUT 1V 80 43.2k COMPa V 30A OSNS+ 47pF EFFICIENCY (%) COMPb VFB 75 100µF TRACK/SS VOSNS– 90.9k 6.3V 0.1µF ×6 70 5V INPUT* SGND GND 12V INPUT 4647 TA01a 65 PINS NOT USED IN THIS CIRCUIT: 0 5 10 15 20 25 30 CLKOUT, MODE/PLLIN, PGOOD, LOAD CURRENT (A) PHASMD, PWM, RUN, SW, TEMP+, TEMP– *5V INPUT SEE FIGURE 24 4647 TA01b 4647fb For more information www.linear.com/LTM4647 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Typical Applications