Electronic Components Datasheet Search |
|
LTC4012-2 Datasheet(PDF) 9 Page - Linear Technology |
|
LTC4012-2 Datasheet(HTML) 9 Page - Linear Technology |
9 / 28 page 4012fa LTC4012/ LTC4012-1/LTC4012-2 pin Functions PROG(Pin13):ChargeCurrentProgrammingandMonitor- ing Pin. An external resistance connected between PROG and GND, along with the current sense and PWM input resistors, programs the maximum charge current. The voltage on this pin can also provide a linearized indicator of charge current. Refer to the Applications Information section for complete details on current programming and monitoring. Operating voltage range is GND to INTVDD. CSN (Pin 14): Charge Current Sense Negative In- put. Place an external input resistor (RIN, Figure 1) between this pin and the negative side of the charge current sense resistor. Operating voltage ranges from (BAT – 50mV) to (BAT + 200mV). CSP (Pin 15): Charge Current Sense Positive Input. Place an external input resistor (RIN, Figure 1) be- tween this pin and the positive side of the charge current sense resistor. Operating voltage ranges from (BAT – 50mV) to (BAT + 200mV). BGATE (Pin 16): External Synchronous NFET Gate Control Output.ThisoutputprovidesgatedrivetoanexternalNMOS powertransistorswitchusedforsynchronousrectification to increase efficiency in the step-down DC/DC converter. Operating voltage is GND to INTVDD. BGATE should be left floating if not used. INTVDD (Pin 17): Internal 5V Regulator Output. This pin provides a means of bypassing the internal 5V regulator used to power the LTC4012 PWM FET drivers. This supply shuts down when the LTC4012 shuts down. Refer to the Application Information section for details if additional power is drawn from this pin by the application circuit. SW (Pin 18): PWM Switch Node. The LTC4012 uses the voltage on this pin as the source reference for its topside NFET (PWM switch) driver. Refer to the Applications In- formation section for additional PCB layout suggestions related to this critical circuit node. Operating voltage range is GND to CLN. TGATE(Pin19):ExternalNFETSwitchGateControlOutput. ThisoutputprovidesgatedrivetoanexternalNMOSpower transistor switch used in the DC/DC converter. Operating voltage range is GND to (CLN + 5V). BOOST (Pin 20): TGATE Driver Supply Input. A bootstrap capacitor is returned to this pin from a charge network connected to SW and INTVDD. Refer to the Applications Information section for complete details on circuit topol- ogyandcomponentvalues.Operatingvoltagerangesfrom (INTVDD – 1V) to (CLN + 5V). GND (Exposed Pad Pin 21): Ground. The package paddle provides a single-point ground for the internal voltage reference and other critical LTC4012 circuits. It must be soldered to a suitable PCB copper ground pad for proper electrical operation and to obtain the specified package thermal resistance. |
Similar Part No. - LTC4012-2_15 |
|
Similar Description - LTC4012-2_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 |