LTC2920-2IMS8#TRPBF Linear Technology, LTC2920-2IMS8#TRPBF Datasheet
LTC2920-2IMS8#TRPBF
Specifications of LTC2920-2IMS8#TRPBF
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LTC2920-2IMS8#TRPBF Summary of contents
Page 1
... Supply “Margining”). The LTC2920 uses a single resistor to set the voltage margining current. The margining current is adjustable over a 400:1 range. Precision margin currents can be supplied to within 0.6V of ground or V The LTC2920 single margining controller ...
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... Current— IMHIGH MARGIN Sourcing or Sinking Output Voltage Compliance Operating Temperature Range LTC2920-1C/LTC2920-2C ....................... 0°C to 70°C + 0.3V) LTC2920-1I/LTC2920-2I .................... – 40°C to 85° 0.3V) Storage Temperature Range ................. – 65°C to 150°C CC Lead Temperature (Soldering, 10 sec).................. 300° LTC2920-1CS5 TOP VIEW LTC2920-1IS5 IN2 2 ...
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... I less 0.2V. Note 5: Determined by design, not production tested ⏐ Note 6: 1 – (I > 4V: 0.58 ≤ and I are ⏐ Note 7: 1 – (I accuracy will vary within ≤ 20pF LTC2920-1/LTC2920-2 MIN TYP MAX ● 3 7.5 ● ● ● ● ● ● 3 7.5 ● ...
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... I Power Filtering in the pin is a high impedance output. Internally, the IN1 pin is connected to a 1.2V voltage source by an internal ~10k resistor. The LTC2920 has an internal RC circuit to sup- press noise entering from this pin. LTC2920-2 Only R ...
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... V (V) MARGIN 2920-1/2 G04 I Rise Time MARGIN HIGH RANGE V IN(DELAYON) ENDS 0% LOW RANGE HIGH RANGE 1μs/DIV LTC2920-1/LTC2920 Low Range CC MARGIN Sourcing Current 1800 1600 2 CHANNELS 1400 1200 1000 800 1 CHANNEL 600 400 200 100 120 140 160 180 I (μ ...
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... VOLTAGE MARGINING POWER SUPPLIES USING A FEEDBACK PIN One common power supply architecture supported by the LTC2920 is a power supply with a feedback pin and two feedback resistors. Even complicated switching power supplies can be typically modeled as a simple amplifier with a reference voltage and a two resistor feedback network (Figure 1) ...
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... Traditionally such power supply modules are margined by calculating the two resistors, and alternately connecting each Figure 3 shows how the LTC2920 can be used in these applications as well. Using the LTC2920 for these applica tions can save a significant amount of PCB real estate V and cost. ...
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... Containing a Feedback Pin and Two Feedback Resistors Calculating the value of the current setting resistor, R for a power supply with a feedback pin is straight forward. When the LTC2920 is being added to an existing power supply design, the power supply feedback resistors R R have already been selected. By knowing R ...
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... Type Power Supply Modules ‘Brick’ power supply modules often have a trim pin which can be used for voltage margining. Figure 7 shows a typical connection using the LTC2920 for voltage margin- ing a power supply module. The amount of current necessary to adjust the output voltage of the power supply module is not normally given directly by the manufacturer ...
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... The LTC2920 can source or sink current only when the voltage at the I In order to be sure that the LTC2920 will operate correctly in this application, ensure that the V these limits this, calculate the effective output resistance of the power supply module’s trim output pin, R (refer to Figure 10) ...
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... U U APPLICATIO S I FOR ATIO the I specification does not fall within this MACCURACY T range, the LTC2920 cannot be used for this application. + SENSE + + TRIM + R V TRIM – REF – V – – SENSE Figure 10. Power Module I Accuracy of Power Supply Voltages when Margining The accuracy of margined power supply voltages depends on several factors ...
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... V IN pin of the LTC2920 fault M and I pins Connecting V Supply Being Margined not practical to power the LTC2920-1 from the the power supply being margined, connect the OUT V pin of the LTC2920-1 using a Schottky diode (Fig the IN OUT ure 15). This solution works with power supply feedback voltages of less than 1 ...
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... IN occur. Connecting V Supplies Being Margined not practical to power the LTC2920-2 from the V and/or V connect the V diode (Figure 18). This solution works with power supply feedback voltages less that 1.5V and I >30μA. Be sure to account for the diode drop across all temperatures to ensure the LTC2920-2 V specifications are met ...
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... S must be known. Refer to the power supply manufacturer’s can be data sheet for this voltage. The voltage at the I BYP be within specified limits of the LTC2920, including the voltage drop across R supply feedback pin voltage is 1.21V, I and V is 3.3V. To maintain LTC2920 current accuracy, CC ...
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... TYP GAUGE PLANE 0.53 ± 0.152 (.021 ± .006) DETAIL “A” 0.18 (.007) SEATING PLANE LTC2920-1/LTC2920-2 2.90 BSC (NOTE 4) 0.30 – 0.45 TYP 5 PLCS (NOTE 3) 0.01 – 0.10 1.90 BSC S5 TSOT-23 0302 3.00 ± 0.102 (.118 ± .004) ...
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... SET 188.3k 2920-1/2 TA02 BYP B 0.1μF 500Ω 3.57k + OUT 100μF 6. × LTC2920 IN THREE-STATE GND 21.5k – 1.3V) Compliance CC LT/LT 0505 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2003 V OUT 3.3V 4.5A SYSTEM CONTROLLER GND 2920-1/2 TA03 292012fa ...