ltm8021 Linear Technology Corporation, ltm8021 Datasheet
ltm8021
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ltm8021 Summary of contents
Page 1
... Included in the package are the switching controller, power switches, inductor, and all support components. Operating over an input voltage range 36V, the LTM8021 supports an output voltage range of 0.8V to 5V, set by a single resistor. Only an output and bulk input capacitor are needed to fi nish the design. ...
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... LTM8021EV#PBF LTM8021V LTM8021IV#PBF LTM8021V Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. For more information on lead free part marking, go to: This product is only offered in trays. For more information go to: ELECTRICAL CHARACTERISTICS erature range, otherwise specifi ...
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... Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTM8021E is guaranteed to meet performance specifi cations from 0°C to 125°C internal. Specifi cations over the full –40°C to 125°C internal operating temperature range are assured by design, characteriza- ...
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... LTM8021 TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency vs Load Current 1.8V OUT 12V 24V 36V 100 150 200 250 300 450 50 350 400 LOAD CURRENT (mA) 8021 G01 Effi ciency vs Load Current 12V ...
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... OUTPUT CURRENT (mA) Minimum Input Running Voltage vs Output Voltage 500mA OUT OUTPUT VOLTAGE (V) LTM8021 unless otherwise noted ° A Input Current vs Output Current 140 V = 24V IN 120 = 5V 100 V = 3.3V OUT 2.5V OUT 1.8V 20 ...
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... GND (Bank 3): The GND connections serve as the main signal return and the primary heatsink for the LTM8021. Tie the GND pins to a local ground plane below the LTM8021 and the circuit components. Return the feedback divider to this signal. ADJ (Pin A2): The LTM8021 regulates its ADJ pin ...
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... The input voltage range 36V. Given that the LTM8021 is a step down converter, make sure that the input voltage is high enough to support the desired output voltage and load current. Please refer to the simplifi ed Block Diagram. The LTM8021 contains a current mode controller, power switching element, power inductor, power Schottky diode and a modest amount of input and output capacitance ...
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... LTM8021 APPLICATIONS INFORMATION Table 1. Recommended Component Values and Confi guration V RANGE V IN OUT 3.4V to 36V 0.8V 3.4V to 36V 1.2V 3.4V to 36V 1.5V 3.4V to 36V 1.8V 3.5V to 36V 36V 2. 36V 2. 36V 3. 36V 5V 3.5V to 32V –3.3V 3.75V to 31V –5V 3.4V to 15V 0.8V 3.4V to 15V 1.2V 3.4V to 15V 1.5V 3.4V to 15V 1.8V 3.5V to 15V 15V 2. 15V 2 ...
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... LOAD CURRENT (A) Figure 1. The LTM8021 Requires More Voltage to Start Than to Run If this audible noise is unacceptable, use a high performance electrolytic capacitor at the output. This output capacitor can be a parallel combination of a 1μF ceramic capacitor and a low cost electrolytic capacitor. A fi nal precaution regarding ceramic capacitors con- cerns the maximum input voltage rating of the LTM8021 ...
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... Shorted Input Protection Care needs to be taken in systems where the output will be held high when the input to the LTM8021 is absent. This may occur in battery charging applications or in battery backup systems where a battery or some other supply is diode ORed with the LTM8021’s output. If the V allowed to fl ...
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... The small size, robustness and low impedance of ceramic capacitors make them an attractive option for the input bypass capacitor of LTM8021. However, these capacitors can cause problems if the LTM8021 is plugged into a live supply (see the Linear Technology Application Note 88 for a complete discussion). The low loss ceramic capacitor ...
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... ENERGIZED 24V SUPPLY + + Figure 5. Ensures Reliable Operation When the LTM8021 is Connected to a Live Supply High Temperature Considerations The die temperature of the LTM8021 must be lower than the maximum rating of 125°C, so care should be taken in the layout of the circuit to ensure good heat sinking of the LTM8021 ...
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... OUT 7V TO 36V RUN/SS BIAS GND ADJ 1μF 19.1k APPLICATIONS INFORMATION SECTION FOR START-UP DETAILS. 4.7μF OPTIONAL SCHOTTKY CLAMP –5V 8021 TA05 LTM8021 1.8V Step-Down Converter LTM8021 OUT 1.8V AT 500mA 5V BIAS RUN/SS 100μF GND ADJ 1μF 78.7k V OUT 5V AT 500mA 2.2μ ...
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... LTM8021 PACKAGE DESCRIPTION 11.250 aaa Z BSC PAD 1 CORNER PACKAGE TOP VIEW 4 2.540 1.270 0.0000 0.9525 1.270 1.5875 2.540 SUGGESTED PCB LAYOUT TOP VIEW NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M-1994 2. ALL DIMENSIONS ARE IN MILLIMETERS 3 LAND DESIGNATION PER JESD MO-222, SPP-010 AND SPP-020 ...
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... 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. LTM8021 Pinout (Sorted by Pin Number) PIN SIGNAL DESCRIPTION ...
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... DC/DC μModule LTM8022 1A, 36V DC/DC μModule LTM8023 2A, 36V DC/DC μModule PolyPhase is a trademark of Linear Technology Corporation Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● 3.3V Step-Down Converter LTM8021 OUT RUN/SS BIAS GND ADJ 1μF 4.7μF 32 ...