 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LTC1479 Datasheet(PDF) 6 Page - Linear Technology |
|
||||||||||||||||||||||||||||||
LTC1479 Datasheet(HTML) 6 Page - Linear Technology |
|
|
6 / 24 page  6 LTC1479 PIN FUNCTIONS External Power Supply Pins DCIN (Pin 1): Supply Input. A 330 Ω resistor should be put in series with this pin and the external DC power source. A 0.1 µF bypass capacitor should be connected to this pin as close as possible. DCDIV (Pin 2): Supply Divider Input. This is a high impedance comparator input with a 1.215V threshold (rising edge) and approximately – 35mV hysteresis. BAT1, BAT2 (Pins 35, 34): Supply Input. These two pins are the inputs from the two batteries. A 1 µF bypass capacitor should be connected to each pin as close as possible if there is no larger battery supply capacitor within 2". VBAT (Pin 32): Battery Voltage Sense. This pin connects the top of the battery resistor ladder to either BAT1 or BAT2. BDIV (Pin 33): Battery Divider Input. A high impedance comparator input with a 1.215V threshold (falling edge) and approximately 35mV hysteresis. VBKUP (Pin 36): Supply Input. This input supplies power to the LTC1479 when in the backup mode of operation. A 1 µF bypass capacitor should be connected to the VBKUP pin as close as possible if there is no larger backup supply capacitor within 2". Internal Power Supply Pins VCCP (Pin 20): Power Supply Output. Bypass this output with at least a 0.1 µF capacitor. The VCCP power supply is used primarily to power internal logic circuitry. VCC (Pin 15): Power Supply Output. This is a nominal 3.60V output. Bypass this regulator output with a 2.2 µF tantalum capacitor. This capacitor is required for stability. V+ (Pin 17): Supply. The V+ pin is connected via three internal diodes to the DCIN, BAT1 and BAT2 pins and powers the top of the VGG switching regulator inductor. Bypass this pin with a 1 µF/35V capacitor. VGG (Pin 16): Gate Supply. This high voltage (36.5V) switching regulator is intended only for driving the internal micropower gate drive circuitry. Do not load this pin with any external circuitry. Bypass this pin with a 1 µF/50V capacitor. SW (Pin 18): Output. This pin drives the “bottom” of the VGG switching regulator inductor which is connected between this pin and the V + pin. GND (Pin 19): Ground. The VGG and V + bypass capacitors should be returned to this ground which is connected directly to the source of the N-channel switch in the VGG regulator. Input Power Switches GA, GB (Pins 4, 6): DCIN Switch Gate Drive. These two pins drive the gates of the back-to-back N-channel switches in series with the DCIN input. SAB (Pin 5): Source Return. The SAB pin is connected to the sources of SW A and SW B. A small pull-down current source returns this node to 0V when the switches are turned off. GC, GD (Pins 7, 9): BAT1 Switch Gate Drive. These two pins drive the gates of the back-to-back N-channel switches in series with the BAT1 input. SCD (Pin 8): Source Return. The SCD pin is connected to the sources of SW C and SW D. A small pull-down current source returns this node to 0V when the switches are turned off. GE, GF (Pins 10, 12): BAT2 Switch Gate Drive. These two pins drive the gates of the back-to-back N-channel switches in series with the BAT2 input. SEF (Pin 11): Source Return. The SEF pin is connected to the sources of SW E and SW F. A small pull-down current source returns this node to 0V potential when the switches are turned off. SENSE + (Pin 13): Inrush Current Input. This pin should be connected directly to the “top” (switch side) of the low valued resistor in series with the three input power selector switch pairs, SW A/B, SW C/D and SW E/F, for detecting and controlling the inrush current into and out of the power supply sources and the output capacitor. |
Similar Part No. - LTC1479_15 |
|
Similar Description - LTC1479_15 |
|
|
|
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
