LTC3406A LINER [Linear Technology], LTC3406A Datasheet
LTC3406A
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LTC3406A Summary of contents
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... Schottky diode. Low output voltages are easily supported with the 0.6V Package feedback reference voltage. The LTC3406A is available in a low profi le (1mm) ThinSOT package LTC and LTM are registered trademarks of Linear Technology Corporation. ThinSOT is a registered trademark of Linear Technology Corporation. ...
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... The denotes the specifi cations which apply over the full operating ● = 25° 3.6V unless otherwise specifi ed CONDITIONS (Note 4) LTC3406AE (Note 4) LTC3406AI V = 2.5V to 5.5V (Note 4) LTC3406AE 2.5V to 5.5V (Note 4) LTC3406AI 3V 0. Duty Cycle < 35% (Note 5) V ...
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... RUN from 10% to 90% Full-Scale FB Note 4: The LTC3406A is tested in a proprietary test mode that connects V to the output of the error amplifi er. 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 temperature will exceed 125° ...
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... LTC3406A TYPICAL PERFORMANCE CHARACTERISTICS (From Front Page Figure Except for the Resistive Divider Resistor Values) Output vs Load Current 1.820 2.7V OUT 3.6V 1.816 4.2V IN 1.812 1.808 1.804 1.800 1.796 1.792 1.788 1.784 1.780 0 200 400 OUTPUT CURRENT (mA) 3406A G04 Oscillator Frequency vs Temperature 1 ...
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... TO 600mA LOAD Load Step V OUT 200mV/DIV I L 500mA/DIV I LOAD 500mA/DIV V = 3.6V 20μs/DIV 1.8V OUT I = 200mA TO 600mA LOAD LTC3406A Switch Leakage vs Input Voltage 1000 RUN = 0V 900 800 700 600 500 MAIN SWITCH 400 300 SYNCHRONOUS 200 SWITCH 100 0 100 125 ...
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... LTC3406A PIN FUNCTIONS RUN (Pin 1): Run Control Input. Forcing this pin above 1.5V enables the part. Forcing this pin below 0.3V shuts down the device. In shutdown, all functions are disabled drawing <1μA supply current. Do not leave RUN fl oating. GND (Pin 2): Ground Pin. ...
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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 LTC3406A is used at 100% duty cycle with low input voltage (See Thermal Considerations in the Applications Information section). Slope Compensation and Inductor Peak Current ...
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... LQH32CN 4.7 0.150 style inductor to use often depends more on the price vs size requirements and any radiated fi eld/EMI requirements (1) than on what the LTC3406A requires to operate. Table 1 shows some typical surface mount inductors that work well in LTC3406A applications. C and C Selection IN OUT In continuous mode, the source current of the top MOSFET ...
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... ESR make them ideal for switching regulator applications. Because the LTC3406A’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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... SW node will become high impedance. To avoid the LTC3406A from exceeding the maximum junc- tion temperature, the user will need to do some thermal analysis. The goal of the thermal analysis is to determine whether the power dissipated exceeds the maximum junction temperature of the part ...
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... A R where T is the ambient temperature example, consider the LTC3406A in dropout at an input voltage of 2.7V, a load current of 600mA and an ambient temperature of 70°C. From the typical perfor- mance graph of switch resistance, the R P-channel switch at 70°C is approximately 0.27Ω. There- fore, power dissipated by the part is: ...
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... LTC3406A APPLICATIONS INFORMATION V OUT Design Example As a design example, assume the LTC3406A 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. Effi ciency at both low and high load currents is important ...
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... GND 316k 2 3406A F05a * MURATA LQH32CN2R2M33 ** TAIYO YUDEN JMK316BJ106ML † TAIYO YUDEN LMK212BJ475MG 100mV/DIV 500mA/DIV 500mA/DIV 4.2V IN 100 1000 3406A F05b Figure 5. LTC3406A V OUT 2.5V 600mA C ** OUT 10μF CER V OUT LOAD 3406A F05d V = 3.6V 20μs/DIV 2.5V OUT I = 300mA TO 600mA ...
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... V = 1.2V OUT 0 0 OUTPUT CURRENT (mA) 14 2.2μ † 22pF C IN 4.7μF LTC3406A CER 1 5 RUN V FB 301k GND * MURATA LQH32CN2R2M33 301k 2 ** TAIYO YUDEN JMK316BJ106ML † TAIYO YUDEN JMK212BJ475MG 3406A TA02 100mV/DIV 500mA/DIV 500mA/DIV 4.2V IN ...
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... S5 Package 5-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1635) 0.95 REF 1.22 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) LTC3406A 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 REV B 3406afa 15 ...
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... LTC3406A RELATED PARTS PART NUMBER DESCRIPTION LTC3406/LTC3406B 600mA (I ), 1.5MHz, Synchronous OUT Step-Down DC/DC Converters LTC3407/LTC3407-2 Dual 600mA/800mA (I Synchronous Step-Down DC/DC Converters LTC3410/LTC3410B 300mA (I ), 2.25MHz, Synchronous OUT Step-Down DC/DC Converters LTC3411 1.25A (I ), 4MHz, Synchronous OUT Step-Down DC/DC Converter LTC3412 2. 4MHz, Synchronous OUT Step-Down DC/DC Converter LTC3440 600mA (I ...