Datasheet LTM4641 (Analog Devices)

LTM4641 38V, 10A DC/DC µModule Regulator with Advanced Input and Load Protection
FeaTures DescripTion
n
Wide Operating Input Voltage Range: 4.5V to 38V
The LTM®4641 is a switch mode step-down DC/DC n
10A DC Typical, 12A Peak Output Current
µModule® (micromodule) regulator with advanced input n
Output Range: 0.6V to 6V
and load protection features. Trip detection thresholds for n
±1.5% Maximum Total Output DC Voltage Error
the following faults are customizable: input undervoltage, n
Differential Remote Sense Amplifier for POL Regulation
overtemperature, input overvoltage and output overvolt- n
Internal Temperature, Analog Indicator Output
age. Select fault conditions can be set for latchoff or n
Overcurrent Foldback and Overtemperature
hysteretic restart response—or disabled. Included in the
Protection
package are the switching controller and housekeeping ICs, n
Current Mode Control/Fast Transient Response
power MOSFETs, inductor, overvoltage drivers, biasing n
Parallelable for Higher Output Current
circuitry and supporting components. Operating from input n Selectable Pulse-Skipping Operation voltages of 4V to 38V (4.5V start-up), the device supports n Soft-Start/Voltage Tracking/Pre-Bias Start-Up output voltages from 0.6V to 6V, set by an external resis- n 15mm × 15mm × 5.01mm BGA Package tor network remote sensing the point-of-load’s voltage. n SnPb or RoHS Compliant Finish The LTM4641’s high efficiency design can deliver up to
Input Protection
10A continuous current with a few input and output ca- n UVLO, Overvoltage Shutdown and Latchoff Thresholds pacitors. The regulator’s constant on-time current mode n N-Channel Overvoltage Power-Interrupt MOSFET Driver control architecture enables high step-down ratios and n Surge Stopper Capable with Few External Components fast response to transient line and load changes. The
Load Protection
LTM4641 is offered in a 15mm × 15mm × 5.01mm with n Robust, Resettable Latchoff Overvoltage Protection SnPb or RoHS compliant terminal finish. n N-Channel Overvoltage Crowbar Power MOSFET Driver L, LT, LTC, LTM, µModule, Burst Mode, Linear Technology and the Linear logo are registered
applicaTions
trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178, 5847554, 6100678, 6304066, 6580258, 6677210, 8163643. n Ruggedized Electronics
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n Avionics and Industrial Equipment
Typical applicaTion µModule Regulator with Input Disconnect and Fast Crowbar Output Overvoltage Protection 4 1V Load Protected from MTOP
VIN MSP*
Short-Circuit at 38V
4V TO 38V
IN
+ 10µF
3
4.5V START-UP 100µF 50V 50V ×2
1
SHORT-CIRCUIT APPLIED VING VINGP VINH M SW TOP VOUT 1V
4
VINL VOUT
2
100µF 10A VINL, VINH (25V/DIV)
3
750k ×3 CROWBAR (5V/DIV)
2
CROWBAR MCB** fSET M 1.1V BOT OUT PEAK 5.49k UVLO V + OSNS INTVCC LTM4641 5.49k LOAD DRVCC V – VOUT OSNS (200mV/DIV) RUN GND TRACK/SS OV
1
PGM 4641 TA01a 10nF IOVRETRY OVLO FCB LATCH SGND 5.6M 4µs/DIV 4641 TA01b TESTED AT WORST-CASE CONDITION: NO LOAD SGND CONNECTS TO GND INTERNAL TO µMODULE REGULATOR *MSP: (OPTIONAL) SERIES-PASS OVERVOLTAGE POWER INTERRUPT MOSFET, NXP PSMN014-60LS **MCB: (OPTIONAL) OUTPUT OVERVOLTAGE CROWBAR MOSFET, NXP PH2625L 4641fe For more information www.linear.com/LTM4641 1 Document Outline Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information—Power Supply Features Applications Information—Input Protection Features Applications Information—Load Protection Features Applications Information—EMI Performance Applications Information—Multimodule Parallel Operation Applications Information—Thermal Considerations and Output Current Derating Applications Information—Output Capacitance Table Applications Information—Safety and Layout Guidance Typical Applications Appendices Package Description Package Photo Package Description Revision History Typical Application Related Parts