Datasheet LTM4628 (Analog Devices)

LTM4628 Dual 8A or Single 16A DC/DC µModule Regulator
FEATURES DESCRIPTION
n
Complete Standalone Dual Power Supply
The LTM®4628 is a complete dual 8A output switching n
Single 16A or Dual 8A Output
mode DC/DC power supply and can be easily configured n
Wide Input Voltage Range: 4.5V to 26.5V
to provide a single 2-phase 16A output. Included in the n
Output Voltage Range: 0.6V to 5.5V
package are the switching controller, power FETs, inductor, n
±1.5% Total DC Output Error
and all supporting components. Operating from an input n
Differential Remote Sense Amplifier
voltage range of 4.5V to 26.5V, the LTM4628 supports n
Current Mode Control/Fast Transient Response
two outputs each with an output voltage range of 0.6V to n
Adjustable Switching Frequency
5.5V, set by a single external resistor. Its high efficiency n
Overcurrent Foldback Protection
design delivers 8A continuous current for each output. n
Multiphase Parallel Current Sharing with
Only a few input and output capacitors are needed.
Multiple LTM4628s
The device supports frequency synchronization, multi- n
Frequency Synchronization
phase operation, Burst Mode operation and output voltage n
Internal Temperature Sensing Diode Output
tracking for supply rail sequencing. It has an onboard n Selectable Burst Mode® Operation temperature diode for device temperature monitoring. n Soft-Start/Voltage Tracking High switching frequency and a current mode architec- n Output Overvoltage Protection ture enable a very fast transient response to line and load n Small Surface Mount Footprint, Low Profile changes without sacrificing stability. 15mm × 15mm × 4.32mm LGA and Fault protection features include overvoltage and over- 15mm × 15mm × 4.92mm BGA Packages current protection. The power module is offered in space saving and thermally enhanced 15mm × 15mm × 4.32mm
APPLICATIONS
LGA and 15mm × 15mm × 4.92mm BGA packages. The n Telecom and Networking Equipment LTM4628 is available with SnPb (BGA) or RoHS compli- n Storage and ATCA Cards ant terminal finish. n Industrial Equipment L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule, Burst Mode and PolyPhase are registered and LTpowerCAD is a trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION Dual 8A, 1.5V and 1.2V Output DC/DC µModule
®
Regulator
4.7µF
Efficiency and Power Loss at 12V Input
MODE_PLLIN CLKOUT INTVCC EXTVCC PGOOD1 VIN VOUT1 95 2.0 4.5V TO VIN VOUT1 1.5V AT 8A 1.2V 26.5V 10µF 90 1.5V 1.8 * EFFICIENCY 35V 120k TEMP 100µF VOUTS1 10k 6.3V 470µF ×4 1.6 RUN1 DIFFOUT 6.3V 85 POWER LOSS (W) RUN2 SW1 1.4 80 * TRACK1 V 1.2 LTM4628 FB1 75 5.1V ZENER TRACK2 VFB2 40.2k 1.0 70 0.1µF fSET COMP1 60.4k 0.8 POWER LOSS PHASMD COMP2 EFFICIENCY (%) 65 0.6 VOUTS2 60 0.4 100k V V OUT2 OUT2 1.2V AT 8A 55 0.2 SW2 100µF 6.3V 470µF PGOOD2 50 0 6.3V 0 1 2 3 4 5 6 7 8 SGND GND DIFFP DIFFN * PULL-UP RESISTOR AND LOAD CURRENT (A) ZENER ARE OPTIONAL. 4628 TA01b 4628 TA01a 4628fe For more information www.linear.com/LTM4628 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Package Photos Revision History Typical Application Related Parts