ltm4608a Linear Technology Corporation, ltm4608a Datasheet
ltm4608a
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ltm4608a Summary of contents
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... In- cluded in the package are the switching controller, power FETs, inductor and all support components. Operating over an input voltage range of 2.4V to 5.5V, the LTM4608A sup- ports an output voltage range of 0.6V to 5V, set by a single external resistor. This high effi ciency design delivers continuous current (10A peak) ...
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... LTM4608AEV#PBF LTM4608AIV#PBF LTM4608AIV#PBF LTM4608AMPV#PBF LTM4608AMPV#PBF LTM4608AMPV Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. For more information on lead free part marking, go to: This product is only offered in trays. For more information go to: ELECTRICAL CHARACTERISTICS operating temperature range, otherwise specifi ...
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... C = 100μF OUT OUT C = 100μF OUT V = 2.4V 1.5V IN OUT V = 3.3V 1.5V IN OUT 1.5V IN OUT 1.5V 2.4V to 5.5V OUT OUT IN RUN Rising RUN Falling LTM4608A MIN TYP MAX UNITS 400 μA 1. 450 μA 1 μA 3.75 A 4 ● ...
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... Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTM4608AE is guaranteed to meet performance specifi cations over the 0°C to 125°C internal operating temperature range. Specifi cations over the full –40°C to 125°C internal operating ...
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... Load Transient Response I LOAD 1A/DIV V IN 2V/DIV V OUT 20mV/DIV AC COUPLED 20μs/DIV 3.3V 2.21k OUT FB 2A/μs STEP C = 100μF X5R OUT C1 = 100pF , C3 = 22pF FROM FIGURE 18 5.5 LTM4608A Effi ciency vs Load Current 100 CONTINUOUS MODE 2.5V 1. OUT 2.5V 1.5V IN OUT 2.5V 1.8V IN OUT ...
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... LTM4608A TYPICAL PERFORMANCE CHARACTERISTICS Load Transient Response I LOAD 2A/DIV V OUT 20mV/DIV AC COUPLED 4608A G10 20μs/DIV 1.8V 4.87k OUT FB 2.5A/μs STEP C = 100μF X5R OUT C1 = NONE NONE FROM FIGURE 18 Start-Up V OUT 0.5V/DIV V IN 2V/DIV 4608A G13 50μs/DIV 1.5V ...
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... Negative Input to the Internal I THM Amplifi er. Tie this pin to SGND for single phase operation. For PolyPhase operation, tie the master’s I while connecting all of the I PolyPhase is a registered trademark of Linear Technology Corporation. LTM4608A /2 for 4-phase IN to disable OUT , then the TRACK pin’s ...
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... LTM4608A PIN FUNCTIONS PGOOD (C7): Output Voltage Power Good Indicator. Open-drain logic output that is pulled to ground when the output voltage is not within ±10% of the regulation point. Disabled during margining. RUN (F1): Run Control Pin. A voltage above 1.5V will turn on the module (C3-C5): Switching Node of the Circuit is Used for Testing Purposes ...
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... V IN OUT OPERATION The LTM4608A is a standalone nonisolated switch mode DC/DC power supply. It can deliver output current with few external input and output capacitors. This module provides precisely regulated output voltage programmable via one external resistor from 0. 5.0V DC over a 2.4V to 5.5V input voltage. The typical application schematic is shown in Figure 18 ...
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... phases can be cascaded to run simultaneously with respect to each other by programming the PHMODE pin to different levels. The LTM4608A has clock in and clock out for poly phasing multiple devices or frequency synchronization. High effi ciency at light loads can be accomplished with selectable Burst Mode operation using the MODE pin ...
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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 LTM4608A to skip cycles at low output loads, thus increas- ing effi ciency by reducing switching loss. Floating the MODE pin or tying This allows discontinuous conduction mode (DCM) opera- tion down to near the limit defi ...
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... Multiphase Operation For output loads that demand more than 8A of current, TH multiple LTM4608As can be cascaded to run out of phase to provide more output current without increasing input and output voltage ripples. The CLKIN pin allows the LTM4608A to synchronize to an external clock (between 0.75MHz and 2.25MHz) and the internal phase locked ...
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... APPLICATIONS INFORMATION loop allows the LTM4608A to lock onto CLKIN’s phase as well. The CLKOUT signal can be connected to the CLKIN pin of the following LTM4608A stage to line up both the frequency and the phase of the entire system. Tying the PHMODE pin SGND or SV ...
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... Figure 4. Normalized Input RMS Ripple Current vs Duty Factor for One to Six Phases 14 frequency of operation (fundamental) and multiples of the operating frequency (harmonics). To reduce this noise, the LTM4608A can run in spread spectrum operation by tying the CLKIN pin to SV spread spectrum operation, the LTM4608A’s internal oscillator is designed to produce a clock pulse whose period is random on a cycle-by-cycle basis but fi ...
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... APPLICATIONS INFORMATION same as the slave regulator’s feedback divider to implement coincident tracking. The LTM4608A uses an accurate 10k resistor internally for the top feedback resistor. Figure 5 shows an example of coincident tracking: 10k Slave = 1+ • V TRACK R FB4 V is the track ramp applied to the slave’s track TRACK pin ...
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... LTM4608A APPLICATIONS INFORMATION Ratiometric tracking can be achieved by a few simple calculations and the slew rate value applied to the master’s track pin. As mentioned above, the TRACK pin has a control range from 0V to 0.596V. The master’s TRACK pin slew rate is directly equal to the master’s output slew rate in ...
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... F09 to 1.5V Figure 10. BGA Heat Sink with 3.3V IN OUT 110 120 4608A F11 to 1.5V Figure 12. BGA Heat Sink with 5V IN OUT 110 120 4608A F13 to 2.5V Figure 14. BGA Heat Sink with 3.3V IN OUT LTM4608A 400LFM 1 200LFM 0LFM ...
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... LTM4608A APPLICATIONS INFORMATION 400LFM 1 200LFM 0LFM 100 AMBIENT TEMPERATURE (°C) Figure 15. No Heat Sink with 5V Table 4. 1.5V Output DERATING CURVE V (V) IN Figures 9, 11 3.3, 5 Figures 9, 11 3.3, 5 Figures 9, 11 3.3, 5 Figures 10, 12 3.3, 5 Figures 10, 12 3.3, 5 Figures 10, 12 3.3, 5 Table 5. 3.3V Output ...
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... APPLICATIONS INFORMATION Output Margining For a convenient system stress test on the LTM4608A’s output, the user can program the LTM4608A’s output to ±5%, ±10% or ±15% of its normal operational voltage. The margin pin with a voltage divider is driven with a small three-state gate as shown in Figure 18, for the three margin states (high, low, no margin) ...
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... LTM4608A APPLICATIONS INFORMATION 5. 10μF MODE PHMODE 5.5V TRACK C2 10μF Figure 19. Two LTM4608As in Parallel, 1.5V at 16A Design 20 CLKIN CLKIN OUT 220pF SW FB LTM4608A R FB RUN I TH 3.09k PLLLPF I THM TRACK PGOOD (HIGH = 10%) BSEL MODE BSEL (FLOAT = 15%) ...
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... APPLICATIONS INFORMATION D1 MMSD4148 SHDN D2 MMSD4148 SHDN Figure 20. Dual LTM4608A Output Sequencing Application V IN 2.5V TO 5.5V CLKIN CLKIN OUT LTM4608A RUN I TH PLLLPF I THM TRACK PGOOD MODE BSEL PHMODE MGN CLKOUT GND SGND R1 100k CLKIN OUT ...
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... LTM4608A APPLICATIONS INFORMATION 22 4608af ...
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... DETAILS OF PAD #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE PAD #1 IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE 5. PRIMARY DATUM -Z- IS SEATING PLANE 6. THE TOTAL NUMBER OF PADS: 68 SYMBOL TOLERANCE aaa 0.15 bbb 0.10 eee 0.05 LTM4608A DETAIL A PAD ...
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... LTM4608A PACKAGE DESCRIPTION PIN NAME PIN NAME A1 GND B1 GND A2 GND B2 – A3 GND B3 CLKIN A4 GND B4 PHMODE C4 A5 GND B5 MODE A6 GND B6 – A7 GND B7 BSEL A8 GND B8 MGN A9 GND B9 GND A10 GND B10 GND A11 GND B11 GND RELATED PARTS PART NUMBER DESCRIPTION LTC2900 Quad Supply Monitor with Adjustable Reset Timer Monitors Four Supplies; Adjustable Reset Timer ...