Datasheet LTC3615, LTC3615-1 (Analog Devices) - 10

LTC3615/LTC3615-1
pin FuncTions (FE/UF)
behavior for channel 1 is programmable with the TRACK/ 1. Tying the MODE pin to SVIN or SGND enables pulse- SS1 pin: skipping mode or Burst Mode operation (with an internal 1. Internal soft-start with a fixed timing can be programmed Burst Mode clamp), respectively. by tying TRACK/SS1 to SVIN. 2. If this pin is held at slightly higher than half of SVIN, 2. External soft-start can be programmed with the timing forced continuous mode will be selected. set by a capacitor to ground and a resistor to SVIN. 3. Connecting this pin to an external voltage will select 3. Tracking the start-up behavior of another supply is Burst Mode operation with the burst clamp set to the programmable (see the Applications Information pin voltage. section).
PGND (Exposed Pad Pin 25/ Exposed Pad Pin 25):
Power 4. The pin can be used as external reference input. Ground. The exposed pad connects to the sources of the power N-channel MOSFETs. The PGND pin is common
ITH1 (Pin 22/Pin 1):
Error Amplifier Compensation. Con- for both channels. The exposed pad must be soldered nection for external compensation from ITH to SGND. to the PCB. The current comparator’s threshold increases with this control voltage. Tying this pin to SV For electrical connection and rated thermal performance, IN enables AVP mode with internal compensation. refer to the Operation and Applications Information sec- tions for more information.
VFB1 (Pin 23/Pin 2):
Voltage Feedback Input Pin for Channel 1. Receives the feedback voltage for channel 1 from the external resistive divider across the output.
MODE (Pin 24/Pin 3):
Mode Selection. 3615fb 10 For more information www.linear.com/LTC3615 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts