Datasheet LTM4668A (Analog Devices)

LTM4668A Quad DC/DC µModule Regulator with Configurable 1.2A Output Array
FEATURES DESCRIPTION
n Quad Output Step-Down µModule Regulator with The LTM®4668A 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 5.5V 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 LTM4668A supports an output voltage range of n Current Mode Control, Fast Transient Response 0.6V to 5.5V. Only bulk input and output capacitors are n External Frequency Synchronization needed. The device supports frequency synchronization, n Selectable Burst Mode® Operation PolyPhase 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 LTM4668 (0.6V to 1.8V sacrificing stability. Output, 1MHz). 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 LTM4668A is avail- Telecom, Networking and Industrial Equipment n able with SnPb (BGA) or RoHS compliant terminal finish. Multi-Rail Point of Load Regulation n FPGAs, DSPs and ASICs Application
Configurable Output Array
All registered trademarks and trademarks are the property of their respective owners. 1.2A 1.2A 2.4A 3.6A 1.2A 1.2A 4.8A 1.2A 1.2A 1.2A
TYPICAL APPLICATION 5V to 17V Input, Quad 1.5V, 1.8V, 2.5V, 3.3V Output DC/DC µModule Regulator 3.3V Output Efficiency (Each Channel)
100 5V VIN VOUT1 1.5V/1.2A to 17V 95 22µF V 47µF ×2 FB1 40.2k 6.3V 90 25V PGOOD1 LTM4668A 85 RUN1 VOUT2 2.5V/1.2A 80 RUN2 VFB2 47µF 75 RUN3 PGOOD2 19.1k 6.3V RUN4 70 EFFICIENCY (%) VOUT3 3.3V/1.2A 65 VFB3 47µF 60 PGOOD3 13.3k 6.3V VIN = 5V 55 VIN = 12V INTVCC VOUT4 1.8V/1.2A 50 MODE V 0.0 0.2 0.4 0.6 0.8 1.0 1.2 FB4 47µF GND PGOOD4 30.1k 6.3V LOAD CURRENT (A) 4668a TA01b 4668a 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 Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Package Photo Design Resources Related Parts