Datasheet LTM4620 (Analog Devices) - 9
| Fabricante | Analog Devices |
| Descripción | Dual 13A or Single 26A DC/DC µModule Regulator |
| Páginas / Página | 40 / 9 — PIN FUNCTIONS (Recommended to Use Test Points to Monitor Signal Pin … |
| Formato / tamaño de archivo | PDF / 721 Kb |
| Idioma del documento | Inglés |
PIN FUNCTIONS (Recommended to Use Test Points to Monitor Signal Pin Connections.) RUN1, RUN2 (F5, F9):
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LTM4620
PIN FUNCTIONS (Recommended to Use Test Points to Monitor Signal Pin Connections.) RUN1, RUN2 (F5, F9):
Run Control Pin. A voltage above
PGOOD1, PGOOD2 (G9, G8):
Output Voltage Power Good 1.25V will turn on each channel in the module. A voltage Indicator. Open drain logic output that is pulled to ground below 1.25V on the RUN pin will turn off the related chan- when the output voltage is not within ±10% of the regula- nel. Each RUN pin has a 1µA pull-up current, once the tion point. RUN pin reaches 1.2V an additional 4.5µA pull-up current is added to this pin.
INTVCC (H8):
Internal 5V Regulator Output. The control circuits and internal gate drivers are powered from this
DIFFOUT (F8):
Internal Remote Sense Amplifier Output. voltage. Decouple this pin to PGND with a 4.7µF low ESR Connect this pin to VOUTS1 or VOUTS2 depending on which tantalum or ceramic. INTVCC is activated when either output is using remote sense. In parallel operation con- RUN1 or RUN2 is activated. nect one of the VOUTS pin to DIFFOUT for remote sensing.
TEMP (J6):
Onboard Temperature Diode for Monitoring
SW1, SW2 (G2, G11):
Switching node of each channel the VBE Junction Voltage Change with Temperature. See that is used for testing purposes. Also an R-C snubber the Applications Information section. network can be applied to reduce or eliminate switch node ringing, or otherwise leave floating. See the Applications
EXTVCC (J7):
External power input that is enabled through Information section. a switch to INTVCC whenever EXTVCC is greater than 4.7V. Do not exceed 6V on this input, and connect this pin to
PHASMD (G4):
Connect this pin to SGND, INTVCC, or VIN when operating VIN on 5V. An efficiency increase will floating this pin to select the phase of CLKOUT to 60 occur that is a function of the (VIN – INTVCC) multiplied degrees, 120 degrees, and 90 degrees respectively. by power MOSFET driver current. Typical current require-
CLKOUT (G5):
Clock output with phase control using the ment is 30mA. VIN must be applied before EXTVCC, and PHASMD pin to enable multiphase operation between EXTVCC must be removed before VIN. devices. See the Applications Information section.
VIN (M2-M11, L2-L11, J2-J4, J9-J11, K2-K4, K9-K11):
Power Input Pins. Apply input voltage between these pins and GND pins. Recommend placing input decoupling capacitance directly between VIN pins and GND pins.
Top Heat Sink:
Top heat sink is at ground potential. 4620fc For more information www.linear.com/LTM4620 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Package Photo Related Parts
PIN FUNCTIONS (Recommended to Use Test Points to Monitor Signal Pin Connections.) RUN1, RUN2 (F5, F9):
Run Control Pin. A voltage above
PGOOD1, PGOOD2 (G9, G8):
Output Voltage Power Good 1.25V will turn on each channel in the module. A voltage Indicator. Open drain logic output that is pulled to ground below 1.25V on the RUN pin will turn off the related chan- when the output voltage is not within ±10% of the regula- nel. Each RUN pin has a 1µA pull-up current, once the tion point. RUN pin reaches 1.2V an additional 4.5µA pull-up current is added to this pin.
INTVCC (H8):
Internal 5V Regulator Output. The control circuits and internal gate drivers are powered from this
DIFFOUT (F8):
Internal Remote Sense Amplifier Output. voltage. Decouple this pin to PGND with a 4.7µF low ESR Connect this pin to VOUTS1 or VOUTS2 depending on which tantalum or ceramic. INTVCC is activated when either output is using remote sense. In parallel operation con- RUN1 or RUN2 is activated. nect one of the VOUTS pin to DIFFOUT for remote sensing.
TEMP (J6):
Onboard Temperature Diode for Monitoring
SW1, SW2 (G2, G11):
Switching node of each channel the VBE Junction Voltage Change with Temperature. See that is used for testing purposes. Also an R-C snubber the Applications Information section. network can be applied to reduce or eliminate switch node ringing, or otherwise leave floating. See the Applications
EXTVCC (J7):
External power input that is enabled through Information section. a switch to INTVCC whenever EXTVCC is greater than 4.7V. Do not exceed 6V on this input, and connect this pin to
PHASMD (G4):
Connect this pin to SGND, INTVCC, or VIN when operating VIN on 5V. An efficiency increase will floating this pin to select the phase of CLKOUT to 60 occur that is a function of the (VIN – INTVCC) multiplied degrees, 120 degrees, and 90 degrees respectively. by power MOSFET driver current. Typical current require-
CLKOUT (G5):
Clock output with phase control using the ment is 30mA. VIN must be applied before EXTVCC, and PHASMD pin to enable multiphase operation between EXTVCC must be removed before VIN. devices. See the Applications Information section.
VIN (M2-M11, L2-L11, J2-J4, J9-J11, K2-K4, K9-K11):
Power Input Pins. Apply input voltage between these pins and GND pins. Recommend placing input decoupling capacitance directly between VIN pins and GND pins.
Top Heat Sink:
Top heat sink is at ground potential. 4620fc For more information www.linear.com/LTM4620 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Package Photo Related Parts