Datasheet LTM4650-1 (Analog Devices) - 8

LTM4650-1
pin FuncTions (Recommended to Use Test Points to Monitor Signal Pin Connections.) MODE_PLLIN (F4):
Force Continuous Mode, Burst Mode
CLKOUT (G5):
Clock output with phase control using the Operation, or Pulse-Skipping Mode Selection Pin and PHASMD pin to enable multiphase operation between External Synchronization Input to Phase Detector Pin. devices. See the Applications Information section. Connect this pin to SGND to force both channels into force continuous mode of operation. Connect to INTV
PGOOD1, PGOOD2 (G9, G8):
Output Voltage Power CC to enable pulse-skipping mode of operation. Leaving the Good Indicator. Open drain logic output that is pulled to pin floating will enable Burst Mode operation. A clock on ground when the output voltage is not within ±10% of the pin will force both channels into continuous mode of the regulation point. operation and synchronized to the external clock applied
INTVCC (H8):
Internal 5V Regulator Output. The control to this pin. circuits and internal gate drivers are powered from this
RUN1, RUN2 (F5, F9):
Run Control Pin. A voltage above voltage. Decouple this pin to PGND with a 4.7µF low ESR 1.25V will turn on each channel in the module. A voltage tantalum or ceramic. INTVCC is activated when either RUN1 below 1.25V on the RUN pin will turn off the related chan- or RUN2 is activated. nel. Each RUN pin has a 1µA pull-up current, once the
TEMP (J6):
Temperature Monitor. An internal diode con- RUN pin reaches 1.2V an additional 4.5µA pull-up current nected NPN transistor between this pin and SGND with is added to this pin. 10nF filtering capacitor. See the Applications Information
DIFFOUT (F8):
Internal Remote Sense Amplifier Output. section. Connect this pin to VOUTS1 or VOUTS2 depending on which
EXTVCC (J7):
External power input that is enabled through output is using remote sense. In parallel operation con- a switch to INTVCC whenever EXTVCC is greater than 4.7V. nect one of the VOUTS pin to DIFFOUT for remote sensing. 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 by network can be applied to reduce or eliminate switch node power MOSFET driver current. Typical current requirement ringing, or otherwise leave floating. See the Applications is 30mA. VIN must be applied before EXTVCC, and EXTVCC Information section. must be removed before VIN.
PHASMD (G4):
Connect this pin to SGND, INTV
VIN (M2-M11, L2-L11, J2-J4, J9-J11, K2-K4, K9-K11):
CC, or float- ing this pin to select the phase of CLKOUT to 60 degrees, Power Input Pins. Apply input voltage between these pins 120 degrees, and 90 degrees respectively. and GND pins. Recommend placing input decoupling capacitance directly between VIN pins and GND pins. 46501fc 8 For more information www.linear.com/LTM4650-1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Simplified Block Diagram Decoupling Requirements Operation Applications Information Typical Applications Package Description Revision History Package Photo Design Resources Related Parts