Electronic Components Datasheet Search |
|
LTC3823 Datasheet(PDF) 7 Page - Linear Technology |
|
LTC3823 Datasheet(HTML) 7 Page - Linear Technology |
7 / 26 page LTC3823 7 3823fd PIN FUNCTIONS (UH/GN) VRNG (Pin 1/Pin 5): Sense Voltage Range Input. The volt- age at this pin is ten times the nominal sense voltage at maximum output current and can be set from 0.5V to 2V by a resistive divider from INTVCC. The nominal sense voltage defaults to 50mV when this pin is tied to ground and 200mV when tied to INTVCC. Do not set this voltage between 0.5V to ground and 2V to INTVCC. VFB (Pin 2/Pin 6): Error Amplifier Feedback Input. This pin connects the error amplifier input to an external resistive divider from VOUT. ITH (Pin 3/Pin 7): Current Control Threshold and Error Amplifier Compensation Point. The current comparator threshold increases with this control voltage. The voltage ranges from 0V to 2.4V with 0.75V corresponding to zero sense voltage (zero current). SGND (Pin 4/Pin 8): Signal Ground. All small-signal components and compensation components should connect to this ground, which in turn, connects to PGND at one point. ION (Pin 5/Pin 9): On-Time Current Input. Tie a resistor from this pin to ground to set the one-shot timer current and thereby, set the switching frequency. VDIFFOUT (Pin 6/Pin 10): Output of Remote Sensing Dif- ferential Amplifier. Connect this to VFB directly or through a resistive divider. VOUTSENSE+ (Pin 8/Pin 11): This is the positive sense pin for the remote sense differential amplifier. Connect this pin to the positive terminal of the output load capacitor. VOUTSENSE– (Pin 9/Pin 12): This is the negative sense pin for the remote sense differential amplifier. Connect this pin to the negative terminal of the output load capacitor. NC (Pins 7, 10, UH Package): No Connect. TRACK/SS (Pin 11/Pin 13): Output Voltage Tracking and Soft-Start Input. When the IC is configured to be the master of two outputs, a capacitor to ground at this pin sets the ramp rate for the output voltage. When the IC is configured to be the slave of two outputs, the VFB voltage of the master IC is reproduced by a resistive divider and applied to this pin during the soft-start phase. An internal 1.7μA soft-start current is charging this pin during the soft-start phase. PLLFLTR (Pin 12/Pin 14): The phase-locked loop’s lowpass filter is tied to this pin. The voltage at this pin defaults to 1.180V when the IC is not synchronized with an external clock at the PLLIN pin. PLLIN (Pin 13/Pin 15): External Synchronization Input to Phase Detector. This pin is internally terminated to SGND with a 50k resistor. VIN (Pin 14/Pin 16): Main Input Supply. Decouple this to PGND with a capacitor (0.1μF to 1μF). VINSNS (Pin 15, UH Package): VIN Voltage Sense Input. Normally this pin is tied to VIN. However, in certain ap- plications when the IC is powered from a separate supply, VINSNS is tied to the upper MOSFET supply to sense the VIN voltage. This pin is co-bonded with VIN in the GN package. ZVCC (Pin 16/Pin 17): Post-Package Zener Trim Supply. Under normal conditions this pin should always be con- nected to INTVCC. Z1/SSENABLE (Pin 17/Pin 18): Post-Package Zener Trim Control. This pin is a multifunctional pin used in produc- tion for post-package trimming and tracking. Ground this pin under normal soft-start operation. Connecting this pin to INTVCC will turn off the soft-start current during tracking. Z2 (Pin 18/Pin 19): Post-Package Zener Trim Control. This pin is used in production for post-package trimming. Ground this pin under normal operation. INTVCC (Pin 19/Pin 20): Internal 5V Regulated Output. The control circuits are powered from this voltage. Decouple this pin to PGND with a minimum of 4.7μF low ESR tan- talum or ceramic capacitor. DRVCC (Pin 20, UH Package): Driver Voltage Input. Must be connected to INTVCC externally. Do not exceed 7V at this pin. This pin is co-bonded to INTVCC internally in the GN package. BG (Pin 21/Pin 21): Bottom Gate Driver Output. This pin drives the gate of the bottom N-channel MOSFET between ground and INTVCC. |
Similar Part No. - LTC3823 |
|
Similar Description - LTC3823 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |