參數(shù)資料
型號: LTC3812IFE-5#TR
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 1 A SWITCHING CONTROLLER, PDSO16
封裝: 4.40 MM, PLASTIC, TSSOP-16
文件頁數(shù): 32/32頁
文件大?。?/td> 425K
代理商: LTC3812IFE-5#TR
LTC3812-5
9
38125fb
EXTVCC (Pin 10): External Driver Supply Voltage. When
this voltage exceeds 4.2V, an internal switch connects
this pin to INTVCC through an LDO and turns off the exter-
nal MOSFET connected to NDRV, so that controller and
gate drive are drawn from EXTVCC.
INTVCC (Pin 11): Main Supply and Driver Supply Pin. All
internal circuits and bottom gate output driver are powered
from this pin. INTVCC should be bypassed to SGND and
PGND with a low ESR (X5R or better) 1μF capacitor in
close proximity to the LTC3812-5.
BG (Pin 12): Bottom Gate Drive. The BG pin drives the
gate of the bottom N-channel synchronous switch MOSFET.
This pin swings from PGND to INTVCC.
PGND (Pin 13): Bottom Gate Return. This pin connects
to the source of the pull-down MOSFET in the BG driver
and is normally connected to ground.
PIN FUNCTIONS
SW (Pin 14): Switch Node Connection to Inductor and
Bootstrap Capacitor. Voltage swing at this pin is from a
Schottky diode (external) voltage drop below ground
to VIN.
TG (Pin 15): Top Gate Drive. The TG pin drives the gate of
the top N-channel synchronous switch MOSFET. The TG
driver draws power from the BOOST pin and returns to the
SW pin, providing true oating drive to the top MOSFET.
BOOST (Pin 16): Top Gate Driver Supply. The BOOST pin
supplies power to the oating TG driver. BOOST should
be bypassed to SW with a low ESR (X5R or better) 0.1μF
capacitor. An additional fast recovery Schottky diode from
INTVCC to the BOOST pin will create a complete oating
charge-pumped supply at BOOST.
Exposed Pad (Pin 17): Ground. The Exposed Pad must
be soldered to PCB ground.
相關(guān)PDF資料
PDF描述
LTC3812EFE-5#TR 1 A SWITCHING CONTROLLER, PDSO16
LTC3812IFE-5 1 A SWITCHING CONTROLLER, PDSO16
LTC3831IGN SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
LTC3833IUDC#PBF SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PQCC20
LTC3833EFE#TRPBF SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PDSO20
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