Datasheet LTC4365 (Analog Devices) - 7
| Fabricante | Analog Devices |
| Descripción | Overvoltage, Undervoltage and Reverse Supply Protection Controller |
| Páginas / Página | 20 / 7 — PIN FUNCTIONS Exposed Pad:. SHDN:. FAULT:. GATE:. UV:. GND:. OV:. VIN:. … |
| Revisión | B |
| Formato / tamaño de archivo | PDF / 1.1 Mb |
| Idioma del documento | Inglés |
PIN FUNCTIONS Exposed Pad:. SHDN:. FAULT:. GATE:. UV:. GND:. OV:. VIN:. VOUT:
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Versión de texto del documento
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 undervolt- age fault threshold. The UV input connects to an accurate, When turned off, GATE is pulled just below the lower of fast (1µs) comparator with a 0.5V falling threshold and VIN or VOUT. When VIN goes negative, GATE is automati- 25mV of hysteresis. When UV falls below its threshold, a cally connected to VIN. 50mA current sink pulls down on the GATE output. When
GND:
Device Ground. UV rises back above 0.525V, and after a 36ms recovery delay waiting period (1ms for LTC4365-1), the GATE
OV:
Overvoltage Comparator Input. Connect this pin to an charge pump is enabled. The low leakage current of the external resistive divider to set the desired VIN overvoltage UV input allows the use of large valued resistors for the fault threshold. The OV input connects to an accurate, fast external resistive divider. If unused, connect to V (1µs) comparator with a 0.5V rising threshold and 25mV IN. While connected to V of hysteresis. When OV rises above its threshold, a 50mA IN, if VIN goes below ground, or if VIN rings to 60V, use a current limiting resistor of at least 100k. current sink pulls down on the GATE output. When OV falls back below 0.475V, and after a 36ms recovery delay
VIN:
Power Supply Input. Maximum protection range: waiting period (1ms for LTC4365-1), the GATE charge –40V to 60V. Operating range: 2.5V to 34V. pump is enabled. The low leakage current of the OV input
VOUT:
Output Voltage Sense Input. This pin senses the volt- allows the use of large valued resistors for the external age at the output side of the external N-channel MOSFET. resistive divider. 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. Rev. B For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application 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 undervolt- age fault threshold. The UV input connects to an accurate, When turned off, GATE is pulled just below the lower of fast (1µs) comparator with a 0.5V falling threshold and VIN or VOUT. When VIN goes negative, GATE is automati- 25mV of hysteresis. When UV falls below its threshold, a cally connected to VIN. 50mA current sink pulls down on the GATE output. When
GND:
Device Ground. UV rises back above 0.525V, and after a 36ms recovery delay waiting period (1ms for LTC4365-1), the GATE
OV:
Overvoltage Comparator Input. Connect this pin to an charge pump is enabled. The low leakage current of the external resistive divider to set the desired VIN overvoltage UV input allows the use of large valued resistors for the fault threshold. The OV input connects to an accurate, fast external resistive divider. If unused, connect to V (1µs) comparator with a 0.5V rising threshold and 25mV IN. While connected to V of hysteresis. When OV rises above its threshold, a 50mA IN, if VIN goes below ground, or if VIN rings to 60V, use a current limiting resistor of at least 100k. current sink pulls down on the GATE output. When OV falls back below 0.475V, and after a 36ms recovery delay
VIN:
Power Supply Input. Maximum protection range: waiting period (1ms for LTC4365-1), the GATE charge –40V to 60V. Operating range: 2.5V to 34V. pump is enabled. The low leakage current of the OV input
VOUT:
Output Voltage Sense Input. This pin senses the volt- allows the use of large valued resistors for the external age at the output side of the external N-channel MOSFET. resistive divider. 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. Rev. B For more information www.analog.com 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts