LTC3564 LINER [Linear Technology], LTC3564 Datasheet
LTC3564
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LTC3564 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 feed- back reference voltage. The LTC3564 is available in low profile (1mm) ThinSOT and 6-Lead (2mm × 3mm) DFN packages. , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ...
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... LTC3564ES5#PBF LTC3564ES5#TRPBF LTC3564IS5#PBF LTC3564IS5#TRPBF LTC3564EDCB#PBF LTC3564EDCB#TRPBF LTC3564IDCB#PBF LTC3564IDCB#TRPBF Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: ...
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... D LTC3564ES5 LTC3564EDCB: T Note 4: The LTC3564 is tested in a proprietary test mode. 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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... LTC3564 W U TYPICAL PERFOR A CE CHARACTERISTICS Efficiency vs Input Voltage 100 I = 100mA OUT 1.25A 80 OUT I = 10mA I = 1mA OUT OUT 0.1mA OUT 1.8V OUT 40 2.5 3.5 4.0 4.5 5.0 3.0 INPUT VOLTAGE (V) 3564 G01 Reference Voltage vs Temperature 615 610 605 600 595 590 585 –50 – ...
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... TEMPERATURE (°C) Supply Current vs Supply Voltage 125 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE (V) 2500 2000 1500 1000 500 100 125 75 3564 G13 LTC3564 T = 25° 3.6V, unless otherwise specified Supply Current vs Temperature 3.6V IN RUN = LOAD 5.0 5.5 –50 –25 ...
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... LTC3564 W TYPICAL PERFOR A CE CHARACTERISTICS Burst Mode Operation SW 2V/DIV V OUT 50mV/DIV AC COUPLED I L 200mA/DIV V = 3.6V 2.5μs/DIV 1.8V OUT I = 40mA LOAD Load Step V OUT 100mV/DIV AC COUPLED I L 1A/DIV I LOAD 1A/DIV V = 3.6V 20μs/DIV 1.8V OUT 1.25A LOAD 6 U Start-Up from Shutdown ...
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... SGND (NA/Pins 5, 7): The Signal Ground Pin. All small signal components and compensation components should be connected to this ground (see Board Layout Consider- ations.) W OSC – + – SLEEP + 0.52V BURST LATCH LTC3564 , and (–) terminal OUT IN 0.65V R + – SENSE I COMP SWITCHING LOGIC ANTI- AND SHOOT- BLANKING ...
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... R DS(ON) (see Typical Performance Characteristics). Therefore, the user should calculate the power dissipation when the LTC3564 is used at 100% duty cycle with low input voltage (See Thermal Considerations in the Applications Informa- tion section). Slope Compensation and Inductor Peak Current Slope compensation provides stability in constant fre- quency architectures by preventing subharmonic oscilla- tions at high duty cycles ...
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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 (1) than on what the LTC3564 requires to operate. Table 1 shows some typical surface mount inductors that work well in LTC3564 applications. VALUE (μH) MAX DC CURRENT (A) 1 ...
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... ESR make them ideal for switching regulator applications. Because the LTC3564’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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... LTC3564 GND Figure 2. Setting the LTC3564 Output Voltage Efficiency Considerations The efficiency of a switching regulator is equal to the output power divided by the input power times 100 often useful to analyze individual losses to determine what is limiting the efficiency and which change would produce the most improvement. Efficiency can be expressed as: Efficiency = 100% – ...
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... where T is the ambient temperature example, consider the LTC3564 in dropout at an input voltage of 2.7V, a load current of 1.2A 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 ~0.2Ω. There- ...
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... Figure 4a. LTC3564 TSOT-23 Layout Diagram C FWD RUN + C LTC3564 OUT – 2 PGND SGND BOLD LINES INDICATE HIGH CURRENT PATH Figure 4b. LTC3564 DFN Layout Diagram LTC3564 R2 C FWD OUT 3564 F04a 3564 F04b 3564f 13 ...
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... VIA PIN FWD LTC3564 OUT GND Figure 5a. LTC3564 TSOT-23 Suggested Layout C L1 OUT Figure 5b. LTC3564 DFN Suggested Layout V OUT SW L1 3564 F05a VIA SGND FWD VIA TO V OUT 3564 F05b 3564f ...
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... FB 5. Keep the (–) plates of C and C IN OUT Design Example As a design example, assume the LTC3564 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 1.25A but most of the time it will be in standby mode, requiring only 2mA. Efficiency at both low 1.1μ ...
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... V = 1.8V OUT 0 0 100 OUTPUT CURRENT (mA) 16 1μ 22pF 10μF LTC3564 22μF CER CER 1 5 RUN V FB 806k GND *MURATA LQH32CN2R2M33 402k 2 ** TAIYO YUDEN JMK316BJ106ML † TAIYO YUDEN JMK316BJ226ML-BR 3564 TA02a V OUT 100mV/DIV AC COUPLED I L 1A/DIV ...
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... GND 402k *FDK MIPW3226D0R9M 2 **TAIYO YUDEN JMK107BJ106MA 3564 TA03a V OUT 100mV/DIV AC COUPLED I L 1A/DIV I LOAD 1A/DIV 4.2V IN 1000 10000 3564 TA03b LTC3564 V OUT 1. OUT 10μF×2 CER V = 3.6V 20μs/DIV 3564 TA04c 1.5V OUT I = 0.3A TO 1.25A LOAD 3564f 17 ...
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... LTC3564 PACKAGE DESCRIPTIO 0.62 MAX 3.85 MAX 2.62 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.20 BSC DATUM ‘A’ 0.30 – 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6 ...
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... DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE LTC3564 0.40 ± 0.10 TYP 4 6 PIN 1 NOTCH R0.20 OR 0.25 × ...
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... LTC3564 RELATED PARTS PART NUMBER DESCRIPTION LTC3405/LTC3405A 300mA (I ), 1.5MHz, Synchronous Step-Down OUT DC/DC Converters LTC3406/LTC3406B 600mA (I ), 1.5MHz, Synchronous Step-Down OUT DC/DC Converters LTC3407/LTC3407-2 Dual 600mA/800mA (I Synchronous Step-Down DC/DC Converters LTC3409 600mA (I ), 1.7MHz/2.6MHz, Synchronous OUT Step-Down DC/DC Converter LTC3410/LTC3410B 300mA (I ), 2.25MHz, Synchronous Step-Down OUT DC/DC Converters LTC3411 1 ...