Datasheet LTM4668 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | Quad DC/DC µModule Regulator with Configurable 1.2A Output Array |
| Pages / Page | 22 / 1 — FEATURES. DESCRIPTION. APPLICATIONS. Configurable Output Array. TYPICAL … |
| Revision | A |
| File Format / Size | PDF / 2.1 Mb |
| Document Language | English |
FEATURES. DESCRIPTION. APPLICATIONS. Configurable Output Array. TYPICAL APPLICATION
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LTM4668 Quad DC/DC µModule Regulator with Configurable 1.2A Output Array
FEATURES DESCRIPTION
n Quad Output Step-Down µModule Regulator with The LTM®4668 is a quad DC/DC step-down µModule 1.2A per Output Channel (micromodule) regulator with 1.2A DC current per out- n Wide Input Voltage Range: 2.7V to 17V put. Outputs can be paralleled in an array for up to 4.8A n 0.6V to 1.8V Output Voltage capability. Included in the package are the switching n 1.2A DC, Parallelable, Output Current Each Channel controllers, power FETs, inductors and support compo- n ±1.5% Total Output Voltage Regulation nents. Operating over an input voltage range of 2.7V to n 100% Duty Cycle Operation 17V, the LTM4668 supports an output voltage range of n Current Mode Control, Fast Transient Response 0.6V to 1.8V. Only bulk input and output capacitors are n External Frequency Synchronization needed. The device supports frequency synchronization, n Selectable Burst Mode® Operation poly-phase operation, selectable Burst Mode operation, n Power Good Indicator 100% duty cycle and low IQ operation. Its high switching n Over Voltage, Current and Temperature Protection frequency and a current mode architecture enables a very n 6.25mm x 6.25mm x 2.1mm BGA Package fast transient response to line and load changes without n Pin Compatible with LTM4668A (0.6V to 5.5V sacrificing stability. Output, 2.25MHz). Fault protection features include overvoltage, overcurrent and overtemperature protection. The power module is
APPLICATIONS
offered in a space saving and thermally enhanced 6.25mm n × 6.25mm × 2.1mm BGA package. The LTM4668 is avail- Telecom, Networking and Industrial Equipment n able with RoHS compliant terminal finish. Multi-Rail Point of Load Regulation n FPGAs, DSPs and ASICs Application
Configurable Output Array
1.2A All registered trademarks and trademarks are the property of their respective owners. 1.2A 2.4A 3.6A 1.2A 1.2A 4.8A 1.2A 1.2A 1.2A
TYPICAL APPLICATION 2.7V to 17V Input, Quad 1.0V, 1.2V, 1.5V, 1.8V Output DC/DC µModule Regulator 1.5V Output Efficiency (Each Channel)
100 2.7V VIN VOUT1 1.0V/1.2A to 17V 22µF 95 V 47µF ×2 FB1 PGOOD1 90.9k 6.3V 90 25V LTM4668 85 RUN1 VOUT2 1.2V/1.2A 80 RUN2 VFB2 47µF RUN3 PGOOD2 60.4k 6.3V 75 RUN4 70 V EFFICIENCY (%) OUT3 1.5V/1.2A 65 VFB3 47µF PGOOD3 60 40.2k 6.3V 55 5VIN 12VIN INTVCC VOUT4 1.8V/1.2A 50 MODE/SYNC VFB4 47µF 0 0.2 0.4 0.6 0.8 1.0 1.2 GND PGOOD4 30.1k 6.3V LOAD CURRENT (A) 4668 TA01b 4668 TA01a Rev. A Do D c o u c m u e m n e t n tFe F e e d e b d a b c a k c For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Package Description Revision History Package Photo Design Resources Related Parts
FEATURES DESCRIPTION
n Quad Output Step-Down µModule Regulator with The LTM®4668 is a quad DC/DC step-down µModule 1.2A per Output Channel (micromodule) regulator with 1.2A DC current per out- n Wide Input Voltage Range: 2.7V to 17V put. Outputs can be paralleled in an array for up to 4.8A n 0.6V to 1.8V Output Voltage capability. Included in the package are the switching n 1.2A DC, Parallelable, Output Current Each Channel controllers, power FETs, inductors and support compo- n ±1.5% Total Output Voltage Regulation nents. Operating over an input voltage range of 2.7V to n 100% Duty Cycle Operation 17V, the LTM4668 supports an output voltage range of n Current Mode Control, Fast Transient Response 0.6V to 1.8V. Only bulk input and output capacitors are n External Frequency Synchronization needed. The device supports frequency synchronization, n Selectable Burst Mode® Operation poly-phase operation, selectable Burst Mode operation, n Power Good Indicator 100% duty cycle and low IQ operation. Its high switching n Over Voltage, Current and Temperature Protection frequency and a current mode architecture enables a very n 6.25mm x 6.25mm x 2.1mm BGA Package fast transient response to line and load changes without n Pin Compatible with LTM4668A (0.6V to 5.5V sacrificing stability. Output, 2.25MHz). Fault protection features include overvoltage, overcurrent and overtemperature protection. The power module is
APPLICATIONS
offered in a space saving and thermally enhanced 6.25mm n × 6.25mm × 2.1mm BGA package. The LTM4668 is avail- Telecom, Networking and Industrial Equipment n able with RoHS compliant terminal finish. Multi-Rail Point of Load Regulation n FPGAs, DSPs and ASICs Application
Configurable Output Array
1.2A All registered trademarks and trademarks are the property of their respective owners. 1.2A 2.4A 3.6A 1.2A 1.2A 4.8A 1.2A 1.2A 1.2A
TYPICAL APPLICATION 2.7V to 17V Input, Quad 1.0V, 1.2V, 1.5V, 1.8V Output DC/DC µModule Regulator 1.5V Output Efficiency (Each Channel)
100 2.7V VIN VOUT1 1.0V/1.2A to 17V 22µF 95 V 47µF ×2 FB1 PGOOD1 90.9k 6.3V 90 25V LTM4668 85 RUN1 VOUT2 1.2V/1.2A 80 RUN2 VFB2 47µF RUN3 PGOOD2 60.4k 6.3V 75 RUN4 70 V EFFICIENCY (%) OUT3 1.5V/1.2A 65 VFB3 47µF PGOOD3 60 40.2k 6.3V 55 5VIN 12VIN INTVCC VOUT4 1.8V/1.2A 50 MODE/SYNC VFB4 47µF 0 0.2 0.4 0.6 0.8 1.0 1.2 GND PGOOD4 30.1k 6.3V LOAD CURRENT (A) 4668 TA01b 4668 TA01a Rev. A Do D c o u c m u e m n e t n tFe F e e d e b d a b c a k c For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Package Description Revision History Package Photo Design Resources Related Parts
