Datasheet LTM4630A (Analog Devices) - 8

LTM4630A
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):
Onboard General Purpose Temperature Diode RUN pin reaches 1.2V an additional 4.5µA pull-up current for Monitoring the VBE Junction Voltage Change with is added to this pin. Temperature. See the Applications Information section.
DIFFOUT (F8):
Internal Remote Sense Amplifier Output.
EXTVCC (J7):
External power input that is enabled through Connect this pin to VOUTS1 or VOUTS2 depending on which a switch to INTVCC whenever EXTVCC is greater than 4.7V. output is using remote sense. In parallel operation con- Do not exceed 6V on this input, and connect this pin to nect one of the VOUTS pin to DIFFOUT for remote sensing. VIN when operating VIN on 5V. An efficiency increase will Diffamp can be used for ≤ 3.3V outputs. occur that is a function of the (VIN – INTVCC) multiplied by
SW1, SW2 (G2, G11):
Switching node of each channel power MOSFET driver current. Typical current requirement that is used for testing purposes. Also an R-C snubber is 30mA. VIN must be applied before EXTVCC, and EXTVCC network can be applied to reduce or eliminate switch node must be removed before VIN. ringing, or otherwise leave floating. See the Applications
VIN (M2-M11, L2-L11, J2-J4, J9-J11, K2-K4, K9-K11):
Information section. Power Input Pins. Apply input voltage between these pins
PHASMD (G4):
Connect this pin to SGND, INTV and GND pins. Recommend placing input decoupling CC, or float- ing this pin to select the phase of CLKOUT to 60 degrees, capacitance directly between VIN pins and GND pins. 120 degrees, and 90 degrees respectively. 4630afb 8 For more information www.linear.com/LTM4630A Document Outline Description Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Operation Applications Information Related Parts