LTC3417AIFE Linear Technology, LTC3417AIFE Datasheet
LTC3417AIFE
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LTC3417AIFE Summary of contents
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... In shutdown, the device draws <1µA. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Burst Mode is a registered trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. ...
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... I = ±5µA (Note 3) TH1 TH2(PINLOAD 0.75V, V FB1 FB2 SYNC/MODE RUN1 RUN2 IN ORDER PART TOP VIEW NUMBER 20 GNDD 19 PGND1 LTC3417AEFE 18 SW1 LTC3417AIFE 17 PHASE 16 GNDA 21 15 FREQ 14 PGOOD 13 SW2 12 SYNC/MODE 11 PGND2 FE PACKAGE = 125°C, θ = 38° 25°C. A MIN TYP MAX 2.25 5.5 ± ...
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ELECTRICAL CHARACTERISTICS ● The denotes specifications which apply over the full operating temperature range, otherwise specifications are 3.6V unless otherwise specified. (Note 2) IN SYMBOL PARAMETER I Half Active Mode (V = 0V, 1.5A Only) S ...
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LTC3417A W TYPICAL PERFOR A CE CHARACTERISTICS OUT1 Burst Mode Operation V OUT 20mV/DIV I L 250mA/DIV V = 3.6V 2µs/DIV 1.8V OUT I = 100mA LOAD REFER TO FIGURE 4 OUT2 Burst Mode Operation V OUT ...
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W U TYPICAL PERFOR A CE CHARACTERISTICS OUT2 Efficiency (Pulse Skipping Mode) 100 I = 250mA LOAD 800mA LOAD 2.5V OUT REFER TO FIGURE 2.5 ...
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LTC3417A CTIO S (DFN/TSSOP) RUN1 (Pin 1/Pin 2): Enable for 1.5A Regulator. When at Logic 1, 1.5A regulator is running. When at 0V, 1.5A regulator is off. When both RUN1 and RUN2 are at 0V, ...
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CTIO AL DIAGRA 1.5A REGULATOR + V FB1 – + 0.752V – + – 0.848V RUN1 VOLTAGE REFERENCE RUN2 SYNC/MODE – 0.848V + – + 0.752V V FB2 – REGULATOR W I TH1 I TH ...
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LTC3417A U OPERATIO The LTC3417A uses a constant frequency, current mode architecture. Both channels share the same clock fre- quency. The PHASE pin sets whether the channels are running in-phase or out of phase. The operating frequency is determined by ...
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U OPERATIO Dropout Operation When the input supply voltage decreases toward the output voltage, the duty cycle increases to 100%. In this dropout condition, the PMOS switch is turned on continu- ously with the output voltage being equal to the ...
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LTC3417A U U APPLICATIO S I FOR ATIO A reasonable starting point for setting ripple current is = 0.35I , where I ∆I L LOAD(MAX) LOAD(MAX) current output. The largest ripple, ∆I maximum input voltage. To guarantee that the ripple ...
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U U APPLICATIO S I FOR ATIO When then the equation simplifies to 1– RMS – V OUT IN OUT ...
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LTC3417A U U APPLICATIO S I FOR ATIO given to ripple current ratings and long term reliability. Ceramic capacitors have the lowest ESR and cost but also have the lowest capacitance density, high voltage and temperature coefficient and exhibit audible ...
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U U APPLICATIO S I FOR ATIO V RUN 2V/DIV V OUT 1V/DIV I L 1A/DIV V = 3.6V 200µs/DIV 1.8V OUT R = 0.9Ω L Figure 2. Digital Soft-Start OUT1 Soft-Start Soft-start reduces surge currents from ...
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... LTC3417A circuits: 1) LTC3417A I ing losses The I S electrical characteristics which excludes MOSFET driver and control currents. I loss that increases with V Hot Swap is a trademark of Linear Technology Corporation. drops toward V , the load step capa- IN OUT , causing a rapid drop in V OUT TM ...
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U U APPLICATIO S I FOR ATIO 2) The switching current is the sum of the MOSFET driver and control currents. The MOSFET driver current results from switching the gate capacitance of the power MOSFETs. Each time a MOSFET gate ...
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LTC3417A U U APPLICATIO S I FOR ATIO the R resistance of the 1.5A P-channel switch is DS(ON) 0.09Ω and the R of the 1A P-channel switch is DS(ON) 0.163Ω. The power dissipated by the part is ...
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U U APPLICATIO S I FOR ATIO V IN 2.25V TO 5.5V V OUT1 1.8V C1 22pF 1.5A R1 511k C OUT1 47µF L1: MIDCOM DUS-5121-1R5R C : KEMET C1210C226K8PAC OUT1 IN1 IN2 10µF ...
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LTC3417A U U APPLICATIO S I FOR ATIO Board Layout Considerations When laying out the printed circuit board, the following checklist should be used to ensure proper operation of the LTC3417A. These items are also illustrated graphically in the layout ...
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... DIMENSIONS ARE IN 3. DRAWING NOT TO SCALE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. U DHC Package 16-Lead Plastic DFN (5mm × ...
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... OUT Converter LTC3448 1.5MHz/2.25MHz, 600mA Synchronous Step-Down DC/DC Converter with LDO Mode LTC3548 Dual 800mA and 400mA (I Step-Down DC/DC Converter ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 20 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● COMMENTS ...