Datasheet LTM4650A (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | Dual 25A or Single 50A DC/DC μModule Regulator with 1% DC Accuracy |
| Pages / Page | 38 / 10 — PIN FUNCTIONS (Recommended to Use Test Points to Monitor Signal Pin … |
| File Format / Size | PDF / 2.3 Mb |
| Document Language | English |
PIN FUNCTIONS (Recommended to Use Test Points to Monitor Signal Pin Connections.) DIFFOUT (F8):. TEMP (J6):. EXTVCC (J7):
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Text Version of Document
LTM4650A
PIN FUNCTIONS (Recommended to Use Test Points to Monitor Signal Pin Connections.) DIFFOUT (F8):
Internal Remote Sense Amplifier Output.
TEMP (J6):
Temperature Monitor. An internal diode con- Connect this pin to VOUTS1 or VOUTS2 depending on which nected NPN transistor connected between TEMP and SGND output is using remote sense. In parallel operation con- pins. See the Applications Information section. nect one of the VOUTS pin to DIFFOUT for remote sensing.
EXTVCC (J7):
External power input that is enabled through
SW1, SW2 (G2, G11):
Switching node of each channel a switch to INTVCC whenever EXTVCC is greater than 4.7V. that is used for testing purposes. Also an R-C snubber Do not exceed 6V on this input, and connect this pin to network can be applied to reduce or eliminate switch node VIN when operating VIN on 5V. An efficiency increase will ringing, or otherwise leave floating. See the Applications occur that is a function of the (VIN – INTVCC) multiplied by Information section. power MOSFET driver current. Typical current requirement
PHASMD (G4):
Connect this pin to SGND, INTV is 30mA. V CC, or float- IN must be applied before EXTVCC, and EXTVCC ing this pin to select the phase of CLKOUT to 60 degrees, must be removed before VIN. 120 degrees, and 90 degrees respectively.
VIN (M2–M11, L2–L11, J2–J4, J9–J11, K2–K4, K9–K11): CLKOUT (G5):
Clock output with phase control using the Power Input Pins. Apply input voltage between these pins PHASMD pin to enable multiphase operation between and GND pins. Recommend placing input decoupling devices. See the Applications Information section. capacitance directly between VIN pins and GND pins.
PGOOD1, PGOOD2 (G9, G8):
Output Voltage Power
Heat Sink (Top Exposed Metal):
The top exposed metal Good Indicator. Open drain logic output that is pulled to is electrically unconnected. ground when the output voltage is not within ±10% of the regulation point.
INTVCC (H8):
Internal 5V Regulator Output. The control circuits and internal gate drivers are powered from this voltage. Decouple this pin to PGND with a 4.7µF low ESR tantalum or ceramic. INTVCC is activated when either RUN1 or RUN2 is activated. 4650afb 10 For more information www.linear.com/LTM4650A
PIN FUNCTIONS (Recommended to Use Test Points to Monitor Signal Pin Connections.) DIFFOUT (F8):
Internal Remote Sense Amplifier Output.
TEMP (J6):
Temperature Monitor. An internal diode con- Connect this pin to VOUTS1 or VOUTS2 depending on which nected NPN transistor connected between TEMP and SGND output is using remote sense. In parallel operation con- pins. See the Applications Information section. nect one of the VOUTS pin to DIFFOUT for remote sensing.
EXTVCC (J7):
External power input that is enabled through
SW1, SW2 (G2, G11):
Switching node of each channel a switch to INTVCC whenever EXTVCC is greater than 4.7V. that is used for testing purposes. Also an R-C snubber Do not exceed 6V on this input, and connect this pin to network can be applied to reduce or eliminate switch node VIN when operating VIN on 5V. An efficiency increase will ringing, or otherwise leave floating. See the Applications occur that is a function of the (VIN – INTVCC) multiplied by Information section. power MOSFET driver current. Typical current requirement
PHASMD (G4):
Connect this pin to SGND, INTV is 30mA. V CC, or float- IN must be applied before EXTVCC, and EXTVCC ing this pin to select the phase of CLKOUT to 60 degrees, must be removed before VIN. 120 degrees, and 90 degrees respectively.
VIN (M2–M11, L2–L11, J2–J4, J9–J11, K2–K4, K9–K11): CLKOUT (G5):
Clock output with phase control using the Power Input Pins. Apply input voltage between these pins PHASMD pin to enable multiphase operation between and GND pins. Recommend placing input decoupling devices. See the Applications Information section. capacitance directly between VIN pins and GND pins.
PGOOD1, PGOOD2 (G9, G8):
Output Voltage Power
Heat Sink (Top Exposed Metal):
The top exposed metal Good Indicator. Open drain logic output that is pulled to is electrically unconnected. ground when the output voltage is not within ±10% of the regulation point.
INTVCC (H8):
Internal 5V Regulator Output. The control circuits and internal gate drivers are powered from this voltage. Decouple this pin to PGND with a 4.7µF low ESR tantalum or ceramic. INTVCC is activated when either RUN1 or RUN2 is activated. 4650afb 10 For more information www.linear.com/LTM4650A
