LTC4358 LINER [Linear Technology], LTC4358 Datasheet
LTC4358
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LTC4358 Summary of contents
Page 1
... The LTC4358 reduces power consumption, heat dissipation, and PC board area. The LTC4358 easily ORs power supplies together to in- crease total system reliability. In diode-OR applications, the LTC4358 regulates the forward voltage drop across the internal MOSFET to ensure smooth current transfer from one path to the other without oscillation ...
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... LTC4358 ABSOLUTE MAXIMUM RATINGS Supply Voltages IN, OUT DRAIN Voltage ................. –0.3V to 28V DD Output Voltage GATE (Note 3) .......................... V Operating Ambient Temperature Range LTC4358C ................................................ 0°C to 70°C LTC4358I.............................................. –40°C to 85°C PIN CONFIGURATION TOP VIEW DRAIN GATE ...
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... Note 2: All currents into pins are positive, all voltages are referenced to GND unless otherwise specifi ed. Note 3: An internal clamp limits the GATE pin to a minimum of 6V above IN. Driving this pin to voltages beyond this clamp may damage the device. LTC4358 MIN TYP MAX ...
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... LTC4358 TYPICAL PERFORMANCE CHARACTERISTICS V Current ( 500 OUT DD 400 300 200 100 (V) DD 4358 G01 MOSFET R vs Temperature DS(ON OUT 26.5V OUT - 100 -25 0 TEMPERATURE (˚C) 4358 G04 ...
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... The voltage sensed at this pin is used to control the source-drain voltage drop across the MOSFET. Connect this pin to the drain of the internal N-channel MOSFET (Pin 15/Pin 17 Positive Supply Input. The LTC4358 is powered from DD the V pin. Connect this pin to OUT either directly or DD through an RC hold-up circuit ...
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... LTC4358 ideal diode that is on. This current is sourced from any load capacitance and from the other supplies. The ideal diode is turned off within 500ns, preventing reverse current from slewing damaging level and minimizing any disturbance on the output ...
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... APPLICATIONS INFORMATION ORing Two Supply Outputs Where LTC4358s are used to combine the outputs of two supplies, the power supply with the highest output voltage sources most or all of the current. If this supply’s output is quickly shorted to ground while delivering load current, the current temporarily reverses and fl ows backwards through the LTC4358. When reverse current fl ...
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... RC hold-up circuit on the V pin can be used as shown DD in Figure 2a and Figure 2b. Layout Considerations The following advice should be considered when laying out a printed circuit board for the LTC4358: The OUT pin should (a) IN DRAIN V = 12V IN ...
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... APPLICATIONS INFORMATION GND Figure 4. DFN Layout Considerations for 1” OUT × 1” Single Sided PCB 0.1 3.5 4.0 5.0 6.0 3.0 4.5 5.5 DIODE CURRENT (A) 4358 F05 Figure 5. Maximum Diode Current vs PCB Area LTC4358 6.5 4358fa 9 ...
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... LTC4358 PACKAGE DESCRIPTION 3.60 ±0.05 2.20 ±0.05 1.70 ± 0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED PIN 1 TOP MARK (SEE NOTE 6) 0.200 REF NOTE: 1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WGED-3) IN JEDEC PACKAGE OUTLINE MO-229 2. DRAWING NOT TO SCALE 3 ...
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... REF 0° – 8° 0.65 (.0256) BSC 4. RECOMMENDED MINIMUM PCB METAL SIZE FOR EXPOSED PAD ATTACHMENT MILLIMETERS (INCHES) *DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.150mm (.006") PER SIDE LTC4358 4.90 – 5.10* (.193 – .201) 3.58 (.141) 16 1514 6.40 2.94 (.252) ( ...
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... LTC4358 V DD GND 0.1μF IN OUT 100Ω LTC4358 V DD GND 0.1μF COMMENTS Negative High Voltage Supplies From –10V to –80V Active Current Limiting, Supplies From 9V to 80V Active Current Limiting, Supplies From –20V to –80V Fast Active Current Limiting, Supplies From –15V Fast Active Current Limiting, Supplies From – ...