ltm8027 Linear Technology Corporation, ltm8027 Datasheet
ltm8027
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ltm8027 Summary of contents
Page 1
... PC boards for high den- sity point of load regulation. A built-in soft-start timer is adjustable with a small capacitor. The LTM8027 is packaged in a thermally enhanced, compact (15mm × 15mm) and low profi le (4.32mm) over-molded land grid array (LGA) package suitable for automated assembly by standard surface mount equipment ...
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... LTM8027EV#PBF LTM8027IV#PBF LTM8027IV#PBF LTM8027MPV#PBF LTM8027MPV#PBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based fi nish parts. For more information on lead free part marking, go to: This product is only offered in trays. For more information go to: ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi ...
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... Specifi cations over the full –40°C to 125°C internal operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTM8027I is guaranteed to meet specifi cations over the full l The denotes the specifi ...
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... LTM8027 TYPICAL PERFORMANCE CHARACTERISTICS Effi ciency vs Load 2.5V OUT 100 12V IN 24V IN 10 36V LOAD (A) 8027 G01 Effi ciency vs Load OUT 100 12V IN 24V IN 20 36V IN 48V 10 IN 60V ...
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... Input Current vs Load 24V OUT 3500 36V IN 48V IN 3000 60V IN 2500 2000 1500 1000 500 LOAD (A) LTM8027 (T = 25°C unless otherwise noted) A Input Current vs Load OUT 2000 12V IN 1800 24V IN 36V IN 1600 48V IN 60V 1400 IN 1200 1000 ...
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... LTM8027 TYPICAL PERFORMANCE CHARACTERISTICS Bias Current vs Load 3.3V OUT 18.0 17.5 17.0 16.5 16.0 15.5 15.0 48V IN 36V IN 14.5 24V IN 12V IN 14 LOAD (A) 8027 G18 Bias Current vs Load 12V OUT 29.5 29.0 28.5 28.0 27.5 27.0 26.5 26.0 48V IN 36V 25.5 IN 24V IN 25 LOAD (A) 8027 G21 Bias Current vs Load 24V OUT 48V IN 36V IN 32 ...
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... V (V) OUT Minimum V vs Load –8V OUT LOAD (A) LTM8027 (T = 25°C unless otherwise noted) A Minimum V vs Load 18V OUT LOAD (A) 8027 G28 Minimum V vs Load –3.3V ...
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... LTM8027 TYPICAL PERFORMANCE CHARACTERISTICS Temperature Rise vs Load 2.5V OUT 42 36V IN 24V 37 IN 12V LOAD (A) 8027 G35 Temperature Rise vs Load OUT 70 60V IN 48V IN 60 36V IN 24V IN 50 12V LOAD (A) 8027 G38 ...
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... If unused, the SYNC pin is connected to GND. For more information see Oscillator Sync in the Application Information section of this data sheet. ADJ (Pin A2): The LTM8027 regulates its ADJ pin to 1.23V. Connect the adjust resistor from this pin to ground. The value given by the equation: ...
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... LINEAR V IN REGULATOR GND R T The LTM8027 is a fi xed frequency PWM regulator. The switching frequency is set by simply connecting the ap- propriate resistor from the RT pin to GND. A linear regulator provides internal power (shown as INTV on the Block Diagram) to the control circuitry. The CC bias regulator normally draws power from the V if the BIAS1and BIAS2 pins are connected to an external voltage higher than 8 ...
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... LTM8027. A ceramic input capacitor combined with trace or cable inductance forms a high Q (under damped) tank circuit. If the LTM8027 circuit is plugged into a live supply, the input voltage can ring to twice its nominal value, possi- bly exceeding the device’s rating. This situation is easily avoided ...
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... LTM8027 APPLICATIONS INFORMATION For example, suppose the LTM8027 needs to provide 5V from an input voltage source that is nominally 12V. From Table 2, the recommended R value is 162k, which cor- T responds to an operating frequency of 210kHz. From the graphs in the Typical Performance Characteristics, the typical INTV current at 12V and 210kHz is 15mA ...
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... The LTM8027 operational status is primarily controlled by a UVLO circuit on internal power source. When the LTM8027 is enabled via the RUN pin, only the V tor is enabled. Switching remains disabled until the UVLO threshold is achieved at the V pin, when the remainder CC of the LTM8027 is enabled and switching commences ...
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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 LTM8027. However, these capacitors can cause problems if the LTM8027 is plugged into a live supply (see Linear Technology Application Note 88 for a complete discussion). The low loss ceramic capacitor ...
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... Thermal Considerations IN The LTM8027 output current may need to be derated required to operate in a high ambient temperature or deliver a large amount of continuous power. The amount of current derating is dependent upon the input voltage, output power and ambient temperature ...
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... LTM8027. The bulk of the heat fl ow out of the LTM8027 is through the bottom of the module and the LGA pads into the printed circuit board. Consequently a poor printed circuit board design can cause excessive heating, result- ing in impaired performance or reliability ...
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... OUT 4.7μF 1M LTM8027 2 RUN BIAS1 SS BIAS2 AUX SYNC RT ADJ GND 48.7k LTM8027 5V V Step-Down Converter OUT OUT 4.7μF 1M LTM8027 2 9V RUN BIAS1 SS BIAS2 AUX SYNC RT ADJ GND 75k 162k 18V V Step-Down Converter OUT OUT 4.7μF 1M LTM8027 2 RUN BIAS1 9V SS ...
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... LTM8027 PACKAGE DESCRIPTION bbb // 6.350 5.080 3.810 2.540 1.270 0.000 1.270 2.540 3.810 5.080 6.350 8027f ...
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... G6 GND L3 G7 GND L5 G8 GND OUT G10 V L8 OUT G11 V L9 OUT H1 V L10 L11 LTM8027 GND GND GND GND V OUT V OUT V OUT GND GND GND GND V OUT V OUT V OUT ...
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... LTM8027 PACKAGE PHOTOGRAPH RELATED PARTS PART NUMBER DESCRIPTION LTM4600 10A DC/DC μModule Regulator LTM4600HVMPV Military Plastic 10A DC/DC μModule Regulator LTM4601/ 12A DC/DC μModule with PLL, Output Tracking/ LTM4601A Margining and Remote Sensing LTM4602 6A DC/DC μModule Regulator LTM4603 6A DC/DC μModule with PLL and Output Tracking/ Margining and Remote Sensing ...