LTM8029 LINER [Linear Technology], LTM8029 Datasheet
LTM8029
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LTM8029 Summary of contents
Page 1
... Operation converter with 5µA quiescent current adjustable ® frequency buck switching regulator that consumes only 5μA of quiescent current. The LTM8029 can accept an input ) as high as 36V MAX to its off-time skipping capability. Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple low. The RUN pin features an accurate threshold and the shutdown current is 0.9μ ...
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... LTM8029IY#PBF LTM8029IY#PBF LTM8029MPY#PBF LTM8029MPY#PBF Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a 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: ...
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... OUT PGOOD = 6V PGOOD = 0.4V The LTM8029I is guaranteed to meet specifications over the full –40°C to 125°C internal operating temperature range. The LTM8029MP is guaranteed to meet specifications over the full –55°C to 125°C internal operating temperature range. Note that the maximum internal temperature ...
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... LTM8029 Typical perForMance characTerisTics T = 25°C, unless otherwise noted. Configured per Table 1, where applicable. A 2.5V Efficiency vs Output OUT Current, BIAS = 12V IN 55 24V IN 36V 100 200 300 400 500 OUTPUT CURRENT (mA) 8029 G01 8V Efficiency vs Output OUT ...
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... IN 9 12V IN 24V IN 8 36V 600 0 100 200 300 400 OUTPUT CURRENT (mA) LTM8029 Input Current vs Output Current, 18V , BIAS = 5V OUT 500 24V IN 450 36V IN 400 350 300 250 200 150 100 50 0 500 600 0 100 200 300 ...
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... LTM8029 Typical perForMance characTerisTics T = 25°C, unless otherwise noted. Configured per Table 1, where applicable Output Current, BIAS 8V , BIAS = 5V OUT 10 12V IN 9 24V IN 36V 100 200 300 400 500 OUTPUT CURRENT (mA) 8029 G19 Minimum V vs Output Current, IN – ...
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... OUTPUT CURRENT (mA) Temperature Rise vs Output Current, –8V OUT 35 12V IN 24V 600 0 100 200 300 400 OUTPUT CURRENT (mA) LTM8029 Temperature Rise vs Output Current, 8V OUT 25 12V IN 24V IN 36V 500 600 0 100 200 300 OUTPUT CURRENT (mA) ...
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... If the shutdown feature is not used, tie this pin to V block DiagraM V IN 0.1µF RUN 8 FB (Pin A2): The LTM8029 regulates its FB pin to 1.2V. Connect the output feedback resistor from this pin to ground. The value of R 1200/(V OUT RT (Pin B1): The RT pin is used to program the switching frequency of the LTM8029 by connecting a resistor from this pin to ground ...
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... This improves efficiency. The RUN pin is used to place the LTM8029 in shutdown. To optimize efficiency, the LTM8029 automatically switches to Burst Mode operation in light load situations. Between ...
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... Please refer to the graphs in the Typical Performance Characteristics section for guidance. The maximum frequency (and attendant R which the LTM8029 should be allowed to switch is given in Table 1 in the f column, while the recommended fre- MAX quency (and R ...
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... X5R V 576k OUT 22µF 6.3V 1206 X5R V 309k OUT 22µF 10V 1210 X5R 2.1V-20V 174k + BIAS to exceed 55V. The minimum input operating voltage may be lower than given in the table. IN LTM8029 OPT T(OPT) MAX T(MIN) 270kHz 536k 510kHz 267k ...
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... A frequency that is too high can reduce efficiency, generate excessive heat or even damage the LTM8029 if the output is overloaded or short-circuited. A frequency that is too low can result in a final design that has too much output ripple or too large of an output capacitor ...
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... RUN The LTM8029 is in shutdown when the RUN pin is low and active when the pin is high. The rising threshold of the RUN comparator is typically 1.15V, with a 30mV hysteresis. This threshold is accurate when resistor divider from V to RUN programs the LTM8029 ...
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... V of the LTM8029 can ring to more than twice the nominal input voltage, possibly exceeding the LTM8029’s rating and damaging the part. If the input supply is poorly controlled or ...
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... Thermal Considerations The LTM8029 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. The temperature rise curves given in the Typical Performance Character- istics section can be used as a guide ...
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... LTM8029. The bulk of the heat flow out of the LTM8029 is through the bottom of the μModule converter and the BGA pads into the printed circuit board. Consequently a poor printed circuit board design can cause excessive heating, resulting in impaired performance or reliability ...
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... OUT RUN BIAS 1µF PGOOD RT GND FB 8029 TA04 158k 309k OUT 47µF 309k V OUT –5V LTM8029 2.5V Step-Down Converter LTM8029 OUT RUN BIAS 1µF 47µF PGOOD RT GND FB 8029 TA03 280k 931k V OUT 5V 600mA 22µF Minimum V vs Output Current IN 12 ...
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... LTM8029 package DescripTion Table 3. Pin Assignment Table (Arranged by Pin Number) PIN FUNCTION A1 RUN – PIN FUNCTION E1 GND E2 GND E3 GND E4 GND E5 GND 18 PIN FUNCTION PIN FUNCTION GND B2 PGOOD C2 GND B3 – C3 – – – IN PIN ...
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... 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. BGA Package 35-Lead (11.25mm × 6.25mm × 3.42mm) (Reference LTC DWG # 05-08-1878 Rev Ø) Z bbb // 2.540 1.270 0.3175 0.000 0.3175 1.270 2.540 LTM8029 8029f 19 ...
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... LTM8029 Typical applicaTion –12V Inverting Output Converter LTM8029 OUT 4.5V TO 31V RUN BIAS 2.2µF PGOOD RT GND FB 137k package phoTo relaTeD parTs PART NUMBER DESCRIPTION LTM8020 36V, 200mA µModule Regulator LTM8021 36V, 500mA µModule Regulator LTM8022 36V, 1A µModule Regulator LTM8023 36V, 2A µModule Regulator LTM8048 Isolated µ ...