Datasheet LTM4620A (Analog Devices) - 9

LTM4620A
PIN FUNCTIONS (Recommended to Use Test Points to Monitor Signal Pin Connections.) RUN1, RUN2 (F5, F9):
Run Control Pin. A voltage above
INTVCC (H8):
Internal 5V Regulator Output. The control 1.25V will turn on each channel in the module. A voltage circuits and internal gate drivers are powered from this below 1.25V on the RUN pin will turn off the related chan- voltage. Decouple this pin to PGND with a 4.7µF low ESR nel. Each RUN pin has a 1µA pull-up current, once the tantalum or ceramic. INTVCC is activated when either RUN pin reaches 1.2V an additional 4.5µA pull-up current RUN1 or RUN2 is activated. is added to this pin.
TEMP (J6):
Onboard Temperature Diode for Monitoring
DIFFOUT (F8):
Internal Remote Sense Amplifier Output. the VBE Junction Voltage Change with Temperature. See Connect this pin to VOUTS1 or VOUTS2 depending on which the Applications Information section. output is using remote sense. In parallel operation con-
EXTV
nect one of the V
CC (J7):
External power input that is enabled through OUTS pin to DIFFOUT for remote sensing. a switch to INTV Diffamp can be used for ≤3.3V outputs. CC whenever EXTVCC is greater than 4.7V. Do not exceed 6V on this input, and connect this pin to
SW1, SW2 (G2, G11):
Switching node of each channel VIN when operating VIN on 5V. An efficiency increase will that is used for testing purposes. Also an R-C snubber occur that is a function of the (VIN – INTVCC) multiplied network can be applied to reduce or eliminate switch node by power MOSFET driver current. Typical current require- ringing, or otherwise leave floating. See the Applications ment is 30mA. VIN must be applied before EXTVCC, and Information section. EXTVCC must be removed before VIN. A 5V output can be
PHASMD (G4):
Connect this pin to SGND, INTV tied to this pin to increase efficiency. See Applications CC, or floating this pin to select the phase of CLKOUT to 60 Information section. degrees, 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 Good Indicator. Open drain logic output that is pulled to ground when the output voltage is not within ±7.5% of the regula- tion point. 4620afc For more information www.linear.com/LTM4620A 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 Design Resources