Datasheet LTM4634 (Analog Devices)

LTM4634 Triple Output 5A/5A/4A Step-Down DC/DC µModule® Regulator
FeaTures DescripTion
n
Three Independent High Efficiency Regulator
The LTM®4634 integrates three complete 5A/5A/4A high
Channels
efficiency switching mode DC/DC converters into one small n
IOUT1,2 = 5A, IOUT3 = 4A
package. Switching controllers, power FETs, inductors, and n
Input Voltage Range: 4.75V to 28V
most support components are included. Operating over an n
Independent VIN for Each Channel
input voltage range of 4.75V to 28V, the LTM4634 provides n
VOUT1,2 Voltage Range: 0.8V to 5.5V
three independent output voltages. VOUT1 and VOUT2 are n
VOUT3 Voltage Range: 0.8V to 13.5V
adjustable from 0.8V to 5.5V, while VOUT3 is adjustable n
±1.5% Maximum Total DC Output Error
from 0.8V to 13.5V. Each output voltage is set by a single n
Current Mode Control/Fast Transient Response
external resistor. n
Frequency Synchronization
High switching frequency and a current mode architecture n
Output Overvoltage and Overcurrent Protection
enable a very fast transient response to line and load n
PolyPhase® Operation with Current Sharing
changes without sacrificing stability. The device supports n
General Purpose Temperature Monitors
frequency synchronization, multiphase parallel opera- n Soft-Start/Voltage Tracking tion, soft-start and output voltage tracking for supply rail n Power Good Monitors sequencing. n SnPb or RoHS Compliant Finish n 15mm × 15mm × 5.01mm BGA Package Fault protection features include overvoltage protection, overcurrent protection and temperature monitoring. The
applicaTions
power module is offered in a space saving, thermally n Telecom, Networking and Industrial Equipment enhanced 15mm × 15mm × 5.01mm BGA package. The n High Density Point of Load Voltage Regulation LTM4634 is available with SnPb (BGA) or RoHS compliant terminal finish. L, LT, LTC, LTM, µModule, PolyPhase, Burst Mode, Linear Technology and the Linear logo are registered trademarks and PowerPath, LTpowerCAD and UltraFast are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6100678, 6144194, 6177787, 6304066, 6580258 and 8163643. Other patents pending.
Typical applicaTion 24V Input to 3.3V, 5V and 12V Output Regulator 24V Input Efficiency
100 24V 5V IN 4.7µF 95 40k 2Ω 10k 10k V V EXTVCC INTV FREQ/PLLLPF 6.3V IN1 IN2 VIN3 CC CNTL_PWR PGOOD12 90 RUN1 PGOOD3 85 V 3.3V RUN2 OUT1 1µF 19.1k 80 RUN3 VFB1 LTM4634 TK/SS1 EFFICIENCY (%) 75 V 5V OUT2 TK/SS2 11.5k 70 V V EXTVCC = 5V TK/SS3 FB2 24V to 3.3V EFF (750kHz) CH1 65 24V to 5V EFF (750kHz) CH2 V 12V OUT3 24V to 12V EFF (750kHz) CH3 4.32k 60 VFB3 MODE/PLLIN GND SGND 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 4634 TA01a LOAD CURRENT (A) 4634 TA01b 4634f For more information www.linear.com/LTM4634 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Related Parts