Datasheet LTC4365 (Analog Devices) - 7
| Hersteller | Analog Devices |
| Beschreibung | Overvoltage, Undervoltage and Reverse Supply Protection Controller |
| Seiten / Seite | 20 / 7 — pin FuncTions Exposed Pad:. SHDN:. FAULT:. GATE:. UV:. GND:. OV:. VIN:. … |
| Dateiformat / Größe | PDF / 508 Kb |
| Dokumentensprache | Englisch |
pin FuncTions Exposed Pad:. SHDN:. FAULT:. GATE:. UV:. GND:. OV:. VIN:. VOUT:
Modelllinie für dieses Datenblatt
LTC4365
Textversion des Dokuments
LTC4365
pin FuncTions Exposed Pad:
Connect to device ground.
SHDN:
Shutdown Control Input. SHDN high enables the
FAULT:
Fault Indication Output. This high voltage open drain GATE charge pump which in turn enhances the gate of an output is pulled low if UV is below its monitor threshold, external N-channel MOSFET. A low on SHDN generates a if OV is above its monitor threshold, if SHDN is low, or if pull down on the GATE output with a 90µA current sink and V places the LTC4365 in low current mode (10µA). If unused, IN has not risen above VIN(UVLO). connect to VIN. If VIN goes below ground, or if VIN rings
GATE:
Gate Drive Output for External N-channel MOSFETs. to 60V, use a current limiting resistor of at least 100k. An internal charge pump provides 20µA of pull-up current and up to 9.8V of enhancement to the gate of an external
UV:
Undervoltage Comparator Input. Connect this pin to an N-channel MOSFET. external resistive divider to set the desired VIN undervoltage fault threshold. Input to an accurate, fast (1µs) compara- When turned off, GATE is pulled just below the lower of tor with a 0.5V falling threshold and 25mV of hysteresis. VIN or VOUT. When VIN goes negative, GATE is automati- When UV falls below its threshold, a 50mA current sink cally connected to VIN. pulls down on the GATE output. When UV rises back above
GND:
Device Ground. 0.525V, and after a 36ms recovery delay waiting period (1ms for LTC4365-1), the GATE charge pump is enabled.
OV:
Overvoltage Comparator Input. Connect this pin to an The low leakage current of the UV input allows the use external resistive divider to set the desired VIN overvoltage of large valued resistors for the external resistive divider. fault threshold. Input to an accurate, fast (1µs) compara- If unused, connect to V tor with a 0.5V rising threshold and 25mV of hysteresis. IN. While connected to VIN, if VIN goes below ground, or if V When OV rises above its threshold, a 50mA current sink IN rings to 60V, use a current limiting resistor of at least 100k. pulls down on the GATE output. When OV falls back below 0.475V, and after a 36ms recovery delay waiting period
VIN:
Power Supply Input. Maximum protection range: (1ms for LTC4365-1), the GATE charge pump is enabled. –40V to 60V. Operating range: 2.5V to 34V. The low leakage current of the OV input allows the use
VOUT:
Output Voltage Sense Input. This pin senses the volt- of large valued resistors for the external resistive divider. age at the output side of the external N-channel MOSFET. Connect to GND if unused. The GATE charge pump voltage is referenced to VOUT. It is used as the charge pump input when VOUT is greater than approximately 6.5V. 4365fa For more information www.linear.com/LTC4365 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Related Parts
pin FuncTions Exposed Pad:
Connect to device ground.
SHDN:
Shutdown Control Input. SHDN high enables the
FAULT:
Fault Indication Output. This high voltage open drain GATE charge pump which in turn enhances the gate of an output is pulled low if UV is below its monitor threshold, external N-channel MOSFET. A low on SHDN generates a if OV is above its monitor threshold, if SHDN is low, or if pull down on the GATE output with a 90µA current sink and V places the LTC4365 in low current mode (10µA). If unused, IN has not risen above VIN(UVLO). connect to VIN. If VIN goes below ground, or if VIN rings
GATE:
Gate Drive Output for External N-channel MOSFETs. to 60V, use a current limiting resistor of at least 100k. An internal charge pump provides 20µA of pull-up current and up to 9.8V of enhancement to the gate of an external
UV:
Undervoltage Comparator Input. Connect this pin to an N-channel MOSFET. external resistive divider to set the desired VIN undervoltage fault threshold. Input to an accurate, fast (1µs) compara- When turned off, GATE is pulled just below the lower of tor with a 0.5V falling threshold and 25mV of hysteresis. VIN or VOUT. When VIN goes negative, GATE is automati- When UV falls below its threshold, a 50mA current sink cally connected to VIN. pulls down on the GATE output. When UV rises back above
GND:
Device Ground. 0.525V, and after a 36ms recovery delay waiting period (1ms for LTC4365-1), the GATE charge pump is enabled.
OV:
Overvoltage Comparator Input. Connect this pin to an The low leakage current of the UV input allows the use external resistive divider to set the desired VIN overvoltage of large valued resistors for the external resistive divider. fault threshold. Input to an accurate, fast (1µs) compara- If unused, connect to V tor with a 0.5V rising threshold and 25mV of hysteresis. IN. While connected to VIN, if VIN goes below ground, or if V When OV rises above its threshold, a 50mA current sink IN rings to 60V, use a current limiting resistor of at least 100k. pulls down on the GATE output. When OV falls back below 0.475V, and after a 36ms recovery delay waiting period
VIN:
Power Supply Input. Maximum protection range: (1ms for LTC4365-1), the GATE charge pump is enabled. –40V to 60V. Operating range: 2.5V to 34V. The low leakage current of the OV input allows the use
VOUT:
Output Voltage Sense Input. This pin senses the volt- of large valued resistors for the external resistive divider. age at the output side of the external N-channel MOSFET. Connect to GND if unused. The GATE charge pump voltage is referenced to VOUT. It is used as the charge pump input when VOUT is greater than approximately 6.5V. 4365fa For more information www.linear.com/LTC4365 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Related Parts