 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LTC3812IFE-5-TR Datasheet(PDF) 8 Page - Linear Technology |
|
||||||||||||||||||||||||||||||
LTC3812IFE-5-TR Datasheet(HTML) 8 Page - Linear Technology |
|
|
8 / 32 page  LTC3812-5 8 38125fb ION (Pin 1): On-Time Current Input. Tie a resistor from VIN to this pin to set the one-shot timer current and thereby set the switching frequency. VRNG (Pin 2): Sense Voltage Limit Set. The voltage at this pin sets 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 95mV when this pin is tied to ground, and 215mV when tied to INTVCC. PGOOD (Pin 3): Power Good Output. Open-drain logic output that is pulled to ground when the output voltage is not between ±10% of the regulation point. The output voltage must be out of regulation for at least 120μs before the power good output is pulled to ground. FCB (Pin 4): Pulse Skip Mode Enable Pin. This pin provides pulse skip mode enable/disable control. Pulling this pin below 0.8V disables pulse skip mode operation and forces continuous operation. Pulling this pin above 0.8V enables pulse skip mode operation. This pin can also be connected to a feedback resistor divider from a secondary winding on the inductor to regulate a second output voltage. ITH (Pin 5): Error Amplifier Compensation Point and Cur- rent Control Threshold. The current comparator threshold increases with control voltage. The voltage ranges from 0V to 2.6V with 1.2V corresponding to zero sense voltage (zero current). VFB(Pin6):FeedbackInput.ConnectVFBthrougharesistor divider network to VOUT to set the output voltage. RUN/SS (Pin 7): RUN/Soft-Start Input. For soft-start, a capacitor to ground at this pin sets the ramp rate of the output voltage (approximately 0.6s/μF). Pulling this pin below 1.5V will shut down the LTC3812-5, turn off both of the external MOSFET switches and reduce the quiescent supply current to 224μA. SGND (Pin 8): Signal Ground. All small-signal components should connect to this ground and eventually connect to PGND at one point. NDRV (Pin 9): Drive Output for External Pass Device of the Linear Regulator for INTVCC. Connect to the gate of an external NMOS pass device and a pull-up resistor to the input voltage VIN. PIN FUNCTIONS RUN/SS Pull-Up Current vs Temperature Shutdown Threshold vs Temperature TEMPERATURE (°C) –50 2 3 25 75 38125 G27 1 –25 0 50 100 125 0 RUN/SS = 0V TEMPERATURE (°C) –50 2.0 25 38125 G28 1.4 1.0 –25 0 50 0.8 0.6 2.2 1.8 1.6 1.2 75 100 125 TYPICAL PERFORMANCE CHARACTERISTICS |
Similar Part No. - LTC3812IFE-5-TR |
|
Similar Description - LTC3812IFE-5-TR |
|
|
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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
