Datasheet LTC4417 (Linear Technology) - 6
| Fabricante | Linear Technology |
| Descripción | Prioritized PowerPath Controller |
| Páginas / Página | 32 / 6 — Typical perForMance characTerisTics. VVALID(OL) vs Pull-Up Current. … |
| Formato / tamaño de archivo | PDF / 438 Kb |
| Idioma del documento | Inglés |
Typical perForMance characTerisTics. VVALID(OL) vs Pull-Up Current. VOV,UV vs Temperature. Deglitched Connection
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LTC4417
Typical perForMance characTerisTics VVALID(OL) vs Pull-Up Current VOV,UV vs Temperature Deglitched Connection
0.5 1.04 1.03 V2 0.4 VUV(RISING) 1.02 VOUT 2V/DIV 1.01 (V) 0.3 (V) (OL) ,UV 1.00 V1 V OV VOV,UV(THR) V VALID 0.2 0.99 100ms/DIV 4417 G12 0.98 0.1 V C OV(FALLING) L = 122µF 0.97 IL = 1A –40V PCH FDD4685 0 0.96 0 0.5 1.0 1.5 2.0 –50 –25 0 25 50 75 100 125 PULL-UP CURRENT (mA) TEMPERATURE (°C) 4417 G10 4417 G11
VOUT Switching from Lower to VOUT Switching from Higher to Higher Voltage with Slew Rate Lower Voltage Control Circuitry Reverse Voltage Blocking
V2 V2, VOUT V2 2V/DIV 10V/DIV VOUT VOUT V1 V1 = 20V 2V/DIV 2V/DIV V1 IVOUT 5A/DIV V1 = –20V 100µs/DIV 4417 G13 20µs/DIV 4417 G14 5µs/DIV 4417 G15 CL = 122µF R C S = 1.43kΩ L = 122µF IL = 1A C I S = 6.8nF L = 1A –40V PCH FDD4685 C –40V PCH FDD4685 L = 100µF IL = 1A –40V PCH FDD4685
pin FuncTions CAS:
Cascade Output. Digital output used for cascad-
EN:
Channel Enable Input. EN is a high voltage input that ing multiple LTC4417s. Connect CAS to EN of another allows the user to quickly connect and disconnect chan- LTC4417 to increase the number of multiplexed input nels without resetting the OV/UV timers. When below 1V, supplies. CAS is pulled up to the internal VLDO voltage all external back-to-back P-channel MOSFETs are driven by an internal 20µA current source to indicate when all off by pulling G1, G2 and G3 to their respective VS1, VS2 inputs are invalid, the external P-channel MOSFETs are and VS3. When above 1V, the highest valid priority chan- determined to be off, and EN is above 1V. CAS also pulls nel is connected to the output. EN is pulled to the internal high when SHDN is driven below 1V. CAS is pulled low VLDO voltage with a 2µA current source and can be pulled when any input supply is within the OV/UV window for at up externally to a maximum voltage of 36V. Leave open least 256ms and both SHDN and EN are above 1V. CAS when not used. also pulls low when EN is driven below 1V. CAS can be
Exposed Pad (UF Package Only):
Exposed pad may be driven to 5.5V independent of the input supply voltages. left open or connected to device ground. Leave open if not used. 4417f 6 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Timing Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
Typical perForMance characTerisTics VVALID(OL) vs Pull-Up Current VOV,UV vs Temperature Deglitched Connection
0.5 1.04 1.03 V2 0.4 VUV(RISING) 1.02 VOUT 2V/DIV 1.01 (V) 0.3 (V) (OL) ,UV 1.00 V1 V OV VOV,UV(THR) V VALID 0.2 0.99 100ms/DIV 4417 G12 0.98 0.1 V C OV(FALLING) L = 122µF 0.97 IL = 1A –40V PCH FDD4685 0 0.96 0 0.5 1.0 1.5 2.0 –50 –25 0 25 50 75 100 125 PULL-UP CURRENT (mA) TEMPERATURE (°C) 4417 G10 4417 G11
VOUT Switching from Lower to VOUT Switching from Higher to Higher Voltage with Slew Rate Lower Voltage Control Circuitry Reverse Voltage Blocking
V2 V2, VOUT V2 2V/DIV 10V/DIV VOUT VOUT V1 V1 = 20V 2V/DIV 2V/DIV V1 IVOUT 5A/DIV V1 = –20V 100µs/DIV 4417 G13 20µs/DIV 4417 G14 5µs/DIV 4417 G15 CL = 122µF R C S = 1.43kΩ L = 122µF IL = 1A C I S = 6.8nF L = 1A –40V PCH FDD4685 C –40V PCH FDD4685 L = 100µF IL = 1A –40V PCH FDD4685
pin FuncTions CAS:
Cascade Output. Digital output used for cascad-
EN:
Channel Enable Input. EN is a high voltage input that ing multiple LTC4417s. Connect CAS to EN of another allows the user to quickly connect and disconnect chan- LTC4417 to increase the number of multiplexed input nels without resetting the OV/UV timers. When below 1V, supplies. CAS is pulled up to the internal VLDO voltage all external back-to-back P-channel MOSFETs are driven by an internal 20µA current source to indicate when all off by pulling G1, G2 and G3 to their respective VS1, VS2 inputs are invalid, the external P-channel MOSFETs are and VS3. When above 1V, the highest valid priority chan- determined to be off, and EN is above 1V. CAS also pulls nel is connected to the output. EN is pulled to the internal high when SHDN is driven below 1V. CAS is pulled low VLDO voltage with a 2µA current source and can be pulled when any input supply is within the OV/UV window for at up externally to a maximum voltage of 36V. Leave open least 256ms and both SHDN and EN are above 1V. CAS when not used. also pulls low when EN is driven below 1V. CAS can be
Exposed Pad (UF Package Only):
Exposed pad may be driven to 5.5V independent of the input supply voltages. left open or connected to device ground. Leave open if not used. 4417f 6 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Timing Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts