LTC3406B-2ES5#PBF Linear Technology, LTC3406B-2ES5#PBF Datasheet
LTC3406B-2ES5#PBF
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LTC3406B-2ES5#PBF Summary of contents
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... The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.6V feedback reference voltage. The LTC3406B-2 is available in a low pro- file (1mm) SOT-23 package. Refer to LTC3406 for appli- cations that require Burst Mode , LTC and LT are registered trademarks of Linear Technology Corporation ...
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... RUN SW IN Note 4: The LTC3406B-2ES5 is tested in a proprietary test mode that connects V to the output of the error amplifier. FB Note 5: Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. Note 6: This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Junction and power temperature will exceed 125° ...
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... TEMPERATURE (°C) Output Voltage vs Load Current 1.844 25°C A 1.834 1.824 1.814 1.804 1.794 1.784 1.774 6 0 100 200 300 400 500 600 700 LOAD CURRENT (mA) LTC3406B-2 Efficiency vs Output Current 100 V = 1.5V OUT T = 25° 1000 OUTPUT CURRENT (mA) ...
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... LTC3406B TYPICAL PERFOR A CE CHARACTERISTICS (From Figure 1a Except for the Resistive Divider Resistor Values Temperature DS(ON) 0 2. 4.2V IN 0.5 0.4 0.3 0.2 0.1 MAIN SWITCH SYNCHRONOUS SWITCH 0 50 100 125 –50 – TEMPERATURE (°C) 3406B G10 Switch Leakage vs Temperature 300 ...
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... OUT I = 200mA TO 600mA LOAD V (Pin 4): Main Supply Pin. Must be closely decoupled IN to GND, Pin 2, with a 2.2µF or greater ceramic capacitor. V (Pin 5): Feedback Pin. Receives the feedback voltage FB from an external resistive divider across the output. LTC3406B-2 3406B G20 20µs/DIV sn3406b2 3406b2fs 5 ...
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... I voltage will ring. This is discontinuous mode operation, and is normal behavior for the switching regulator. At very light loads, the LTC3406B-2 will automatically skip pulses in pulse skipping mode operation to maintain output regu- lation. Refer to LTC3406 data sheet if Burst Mode opera- tion is preferred ...
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... An important detail to remember is that at low input supply voltages, the R (see Typical Performance Characteristics). Therefore, the user should calculate the power dissipation when the LTC3406B-2 is used at 100% duty cycle with low input voltage (See Thermal Considerations in the Applications Information section). Low Supply Operation The LTC3406B-2 will operate with input supply voltages as low as 2 ...
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... The choice of which style inductor to use often depends more on the price vs size requirements and any radiated field/EMI requirements than on what the LTC3406B-2 requires to operate. Table 1 shows some typical surface mount inductors that work well in LTC3406B-2 applications. C ...
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... ESR make them ideal for switching regulator applications. Because the LTC3406B-2’s control loop does not depend on the output capacitor’s ESR for stable operation, ceramic capacitors can be used freely to achieve very low output ripple and small circuit size ...
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... where example, consider the LTC3406B-2 in dropout at an input voltage of 2.7V, a load current of 600mA and ambient temperature of 70°C. From the typical perfor- mance graph of switch resistance, the R P-channel switch at 70°C is approximately 0.52Ω. There- fore, power dissipated by the part is: ...
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... When laying out the printed circuit board, the following checklist should be used to ensure proper operation of the V OUT W U LTC3406B-2. These items are also illustrated graphically in Figures 5 and 6. Check the following in your layout: 1. The power traces, consisting of the GND trace, the regulator can trace and the V OUT wide ...
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... LTC3406B APPLICATIO S I FOR ATIO Design Example As a design example, assume the LTC3406B-2 is used in a single lithium-ion battery-powered cellular phone application. The V will be operating from a maximum of IN 4.2V down to about 2.7V. The load current requirement is a maximum of 0.6A but most of the time it will be in standby mode, requiring only 2mA ...
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... OUT AC COUPLED 10µF CER 500mA/DIV 301k 301k I LOAD 3406B TA09 500mA/DIV V OUT 100mV/DIV AC COUPLED 500mA/DIV I LOAD 500mA/DIV 1000 3406B G02 LTC3406B-2 Load Step I L 3406B TA11 V = 3.6V 20µs/DIV 1.2V OUT I = 0mA TO 600mA LOAD Load Step I L 3406B TA12 V = 3.6V 20µs/DIV ...
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... LTC3406B-2 U TYPICAL APPLICATIO S 5V Input to 3.3V/0.6A Regulator † 4.7µF LTC3406B-2 CER 1 5 RUN V FB GND 2 *MURATA LQH32CN2R2M33 ** TAIYO YUDEN JHK316BJ106ML † TAIYO YUDEN JMK212BJ475MG Efficiency vs Output Current 100 V = 3.3V OUT 0 OUTPUT CURRENT (mA) 14 2.2µH* V OUT 3.3V 22pF 100mV/DIV C ** ...
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... REF 1.50 – 1.75 2.80 BSC 1.4 MIN (NOTE 4) PIN ONE 0.95 BSC 0.80 – 0.90 1.00 MAX 0.09 – 0.20 (NOTE 3) LTC3406B-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 sn3406b2 3406b2fs 15 ...
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