ltm4611 Linear Technology Corporation, ltm4611 Datasheet
ltm4611
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ltm4611 Summary of contents
Page 1
... Burst Mode operation and output voltage tracking for supply rail sequencing. The LTM4611 is available in a thermally enhanced 15mm × 15mm × 4.32mm LGA package. The LTM4611 is PB-free and RoHS compliant. L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, PolyPhase and µModule are registered trademarks of Linear Technology Corporation ...
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... GND OUT L M θ = 26°C/W, θ JCtop PART MARKING* PACKAGE DESCRIPTION LTM4611V 133-Lead (15mm × 15mm × 4.32mm) LGA LTM4611V 133-Lead (15mm × 15mm × 4.32mm) LGA http://www.linear.com/leadfree/ http://www.linear.com/packaging/ TOP VIEW INTV TRACK/ MODE_PLLIN RUN COMP IN ...
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... IN OUT OUT X5R Ceramic 100pF FF Load 50 Full Load V = 3.3V 1.5V 100µF ×4 IN OUT OUT X5R Ceramic 100pF 5V 1.5V IN OUT V = 3.3V 1.5V IN OUT LTM4611 MIN TYP MAX UNITS 1.5 5 1.1 1.22 1. 3.4 3. 1.1 µA 10 µ ...
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... LTM4611 elecTrical characTerisTics junction temperature range, otherwise specifications are at T SYMBOL PARAMETER Control Section V Voltage at V Pin Feedback Overvoltage Lockout OVL I Track Pin Soft-Start Pull-Up TRACK/SS Current t Minimum On-Time ON(MIN) R Resistor Between V FBHI OUT_LCL and V Pins Common Mode Input Range ...
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... Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTM4611 is tested under pulsed load conditions such that T ≈ The LTM4611E is guaranteed to meet performance specifications ...
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... LTM4611 Typical perForMance characTerisTics Efficiency vs Load Current at 1.5V , Forced Continuous Mode IN 95 1.2V OUT 1.0V OUT 0.9V OUT 0.8V 90 OUT OUTPUT CURRENT (A) 4611 G01 Efficiency vs Load Current at 3.3V , Forced Continuous Mode 2.5V OUT 1.8V 1.0V OUT OUT 1.5V 0.9V OUT OUT 1.2V 0.8V OUT OUT ...
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... Connect this pin to GND to force continuous mode operation. Connect to INTV ping mode operation. Leaving the pin floating will enable Burst Mode operation. A clock on this pin will enable synchronization with forced continuous operation. See the Applications Information section. LTM4611 Start-Up, 15A Load V IN 1V/DIV V ...
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... RUN: (A10) Run Control Pin. A voltage above 1.35V will turn on in the module. The V undervoltage lockout (UVLO the LTM4611 must be set with resistor networks from V to RUN and optionally from RUN to GND. Tie all RUN IN pins together for parallel operation. ...
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... External Output Capacitor Requirement OUT (V = 1.5V to 5.5V 1V) IN OUT 1M V OUT µPOWER BIAS GENERATOR 0.5% 60.4k POWER CONTROL INTV 10k LOOP + – C Figure 1. Simplified LTM4611 Block Diagram T = 25°C. Use Figure 1 configuration. A CONDITIONS I = 15A OUT I = 15A OUT LTM4611 INTV CC 10k PGOOD 2µ 0.2µ ...
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... The TRACK/SS pin is used for program- ming the output voltage ramp and voltage tracking during start-up. See the Application Information section. The LTM4611 is internally compensated to be stable over all operating conditions. Table 5 provides a guideline for input and output capacitances for several operating con- ditions. The Linear Technology µ ...
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... If space limitations impede realizing this, then placement of capacitors of value N • • C from V FF Input Capacitors The LTM4611 module should be connected to a low AC impedance DC source. Additional input capacitors are needed for the RMS input ripple current rating. The I equation which follows can be used to calculate CIN(RMS) the input capacitor requirement. Typically 22µ ...
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... In applications where low output ripple and high effi- ciency at intermediate currents are desired, pulse-skipping mode should be used. Pulse-skipping operation allows the LTM4611 to skip cycles at low output loads, thus increasing efficiency by reducing switching loss. Tying the MODE_PLLIN pin to INTV operation. With pulse-skipping mode at light load, the internal current comparator may remain tripped for several cycles, thus skipping operation cycles ...
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... The MODE_PLLIN pin allows the LTM4611 to be synchronized to an external clock (between 360kHz to 710kHz) and the internal phase-locked loop allows the LTM4611 to lock onto input clock phase as well. The PLL- FLTR/f pin has the onboard loop filter for the PLL. See SET Figures 18 and 19 for a synchronizing example circuit ...
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... NOT USED 550 external ramp or the soft-start function of that regulator 500 can be used to develop that master ramp. The LTM4611 can 450 be used as a master by setting the ramp rate on its track 400 pin using a soft-start capacitor. A 1.4µA current source 350 300 is used to charge the soft-start capacitor ...
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... INTV Requiring the output voltage to power up rapidly without attention to the PLLFLTR initial switching frequency of operation that is initially lower than expected (~250kHz)—only during the early stages of start-up—until the PLLFLTR/f steady-state value (1.23V by default). LTM4611 PGOOD V OUT + OUT1 ...
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... SET application is strongly recommended. Overcurrent and Overvoltage Protection The LTM4611 has overcurrent protection (OCP short circuit. The internal current comparator threshold folds back during a short to reduce the output current. An overvoltage condition (OVP) above 7.5% of the regu- lated output voltage will force the top MOSFET off and the bottom MOSFET on until the condition is cleared ...
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... Power Design Tool will be provided for other control loop optimization. Thermal Considerations and Output Current Derating The LTM4611 output current may need to be derated required to operate in a high ambient temperature or deliver a large amount of continuous power. Some factors that influence derating are input voltage, output power, ambient temperature, airflow, and elevation (air density) ...
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... The die temperature of the LTM4611 must be lower than the maximum rating of 125°C, so care should be taken in the layout of the circuit to ensure good heat sinking of the LTM4611. The bulk of the heat flow out of the LTM4611 is through the bottom of the module and the LGA pads into JUNCTION ...
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... IN OUT 400LFM 2 200LFM 0LFM 105 115 AMBIENT TEMPERATURE (°C) to 2.5V with Heat Sink IN OUT LTM4611 400LFM 2 200LFM 0LFM 105 AMBIENT TEMPERATURE (°C) 4611 F08 Figure 1.2V No Heat Sink IN OUT ...
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... LTM4611 applicaTions inForMaTion 400LFM 2 200LFM 0LFM 105 55 85 AMBIENT TEMPERATURE (°C) Figure 16 3.3V with Heat Sink IN OUT Table 2. 1.2V Output DERATING CURVE Figures 9, 11 Figures 9, 11 Figures 9, 11 Figures 10, 12 Figures 10, 12 Figures 10, 12 Table 3. 2.5V Output DERATING ...
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... None Y 21 None 100pF None Y 21 330µF 10pF 10pF Y 21 LTM4611 PART NUMBER 6TPF330M9L (330µF, 6.3V, 9mΩ ESR, D3L Case Size) 2R5TPE470M9 (470µF, 2.5V, 9mΩ ESR, D2E Case Size) DROOP, TRANSIENT 0A TO 7.5A PEAK-TO-PEAK 7. RECOVERY (mV) (mV ) TIME (µs) ...
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... PART NUMBER LTN20069 375424B00034G PART NUMBER T411 referred to its input, and the LTM4611 can only deliver – its output whatever the source supply and local input IN OUT caps can provide. Sluggish source supplies will call for more bulk capacitance placed locally to the LTM4611’s input, to assist the source supply in riding through severe transient load steps ...
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... The device does support overvoltage protection and overcurrent protection. Layout Checklist/Example The high integration of LTM4611 makes the PCB board layout very simple and easy. However, to optimize its electrical and thermal performance, some layout consid- erations are still necessary. ...
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... OSNS – V OSNS INTV PGOOD V OUT + OUT7 V OUT_LCL C * 470µF 100µF FF4 6.3V 6.3V DIFFV OUT + V OSNS – V OSNS INTV 4611 F18 V CONNECTIONS AMONGST ALL PARALLELED LTM4611s FB V OUT 1.2V 60A * C * OUT2 100µF 6.3V * OUT4 * OUT6 * OUT8 4611f ...
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... V OUT1 C1 LTC6908-1 1µF GND OUT2 R2 200k MOD SET C IN4 22µF 10V CLOCK SYNC 180 PHASE Figure 19 30A LTM4611 Two Parallel Outputs with 2-Phase Operation IN1 IN2 IN3 22µF 22µF 22µF 10V 10V 10V R1 10k Figure 20. 3.3V at 15A Design, Example of Not Using Differential Remote Sense ...
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... LTM4611 package phoTograph package DescripTion PIN NAME INTV CC A8 MODE_PLLIN A9 TRACK/SS A10 RUN A11 COMP A12 MTP1 PIN NAME G1 GND G2 GND G3 GND G4 GND G5 GND G6 GND G7 GND G8 GND G9 GND G10 - G11 SGND G12 PGOOD ...
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... However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights bbb 6.9850 5.7150 4.4450 3.1750 1.9050 0.6350 0.0000 0.6350 1.9050 3.1750 4.4450 5.7150 6.9850 LTM4611 4611f ...
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... Figure 21. 1. 15A Design IN COMMENTS Basic 10A DC/DC µModule Synchronizable, PolyPhase Operation to 48A, Pin Compatible with the LTM4611 and LTM4617 Pin Compatible with the LTM4600 Synchronizable, PolyPhase Operation, LTM4603-1 Version has no Remote Sensing, Pin Compatible with the LTM4601 2.375V ≤ V ≤ 5.5V; 0.8V ≤ 9mm × ...