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LTM4639 Arkusz danych(PDF) 1 Page - Linear Technology |
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LTM4639 Arkusz danych(HTML) 1 Page - Linear Technology |
1 / 28 page LTM4632 1 4632fc For more information www.linear.com/LTM4632 TYPICAL APPLICATION FEATURES DESCRIPTION Ultrathin, Triple Output, Step-Down µModule Regulator for DDR-QDR4 Memory The LTM®4632 is an ultrathin triple output step-down µModule® (power module) regulator to provide complete power solution for DDR-QDR4 SRAM. Operating from a 3.6V to 15V input voltage, the LTM4632 supports two ±3A output rails, both sink and source capable, for VDDQ and VTT, plus a 10mA low noise reference VTTR output. Both VTT and VTTR track and are equal to VDDQ/2. Housed in a 6.25mm × 6.25mm × 1.82mm LGA and 6.25mm × 6.25mm × 2.42mm BGA packages, the LTM4632 includes the switching controller, power FETs, inductors and sup- port components. Alternatively, the power module can also be configured as a two phase single ±6A output VTT. Only a few ceramic input and output capacitors are needed to complete the design. The LTM4632 supports selectable Burst Mode operation (CH1 only) and output voltage tracking for supply rail sequencing. Its high switching frequency and current mode control enable a very fast transient response to line and load changes without sacrificing stability. Fault protection features include overvoltage input, over- current and overtemperature protection. The LTM4632 is available with SnPb (BGA) or RoHS com- pliant terminal finish QDR4 Memory Power µModule Regulator Output Efficiency vs Load Current n Complete DDR-QDR4 SRAM Power Solution Including VDDQ, VTT, VTTR (or VREF) n Solution in 0.5cm2 (Dual-Sided PCB) n Wide Input Voltage Range: 3.6V to 15V n 3.3V Input Compatible with VIN Tied to INTVCC n 0.6V to 2.5V Output Voltage Range n Dual ±3A DC Output Current with Sink and Source Capability n ±1.5%, ±10mA Buffered VTTR = VDDQ/2 Output n 3A VDDQ + 3A VTT or Dual Phase Single 6A VTT n ±1.5% Maximum Total Output Voltage Regulation Error Over Load, Line and Temperature n Current Mode Control, Fast Transient Response n External Frequency Synchronization n Multiphase Parallelable with Current Sharing n Selectable Burst Mode® Operation n Overvoltage Input and Overtemperature Protection n Power Good Indicator n Ultrathin 6.25mm × 6.25mm × 1.82mm LGA and 6.25mm × 6.25mm × 2.42mm BGA Packages L , LT, LTC, LTM, µModule, Burst Mode, Linear Technology and the Linear logo are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners. 52.3k VDDQ 4632 TA01a 10µF 25V VIN 3.6V TO 15V VDDQ 1.3V, 3A 22µF 4V 22µF 4V VOUT1 VTT 0.65V, ±3A VTTR 0.65V, 10mA VOUT2 COMP1 VTTR FB1 GND LTM4632 PGOOD1 PGOOD2 VIN RUN1 RUN2 INTVCC SYNC/MODE TRACK/SS1 VDDQIN COMP2 LOAD CURRENT (A) 0 65 90 80 75 70 85 95 2 3 1 4632 TA01b 12V INPUT 5V INPUT APPLICATIONS n DDR Memory Power Supply n General Purpose Point-of-Load Conversion n Telecom, Networking and Industrial Equipment |
Podobny numer części - LTM4639 |
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Podobny opis - LTM4639 |
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