參數(shù)資料
型號(hào): LTC3867IUF#PBF
廠商: LINEAR TECHNOLOGY CORP
元件分類(lèi): 穩(wěn)壓器
英文描述: 0.1 A SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PQCC24
封裝: 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD, QFN-24
文件頁(yè)數(shù): 36/36頁(yè)
文件大?。?/td> 380K
代理商: LTC3867IUF#PBF
LTC3867
9
3867f
PIN FUNCTIONS
INTVCC (Pin 16): Internal 5.3V Regulator Output and
Bottom MOSFET Driver Supply. The control circuits are
powered from this voltage. Decouple this pin to PGND
with a minimum of 4.7F low ESR tantalum or ceramic
capacitor.
BG (Pin 17): Bottom Gate Driver Output. This pin drives
the gate(s) of the bottom N-channel MOSFET(s) between
PGND and INTVCC.
PGND(Pin18):PowerGroundPin.Connectthispinclosely
to the source(s) of the bottom N-channel MOSFET(s), the
(–) terminal of CVCC and (–) terminal of CIN.
SW (Pin 19): Switch Node Connection to the Inductor.
VoltageswingatthispinisfromaSchottkydiode(external)
voltage drop below ground to VIN.
TG (Pin 20): Top Gate Driver Output. This is the output of
the floating driver with a voltage swing equal to INTVCC
superimposed on the SW voltage.
BOOST (Pin 21): Boosted Floating Driver Supply. The (+)
terminal of the bootstrap capacitor connects to this pin.
This pin swings from a diode drop below INTVCC up to
VIN + INTVCC.
PGOOD (Pin 22): Power Good Indicator Output. Open-
drain output that pulls to ground when output voltage is
not in regulation.
MODE/PLLIN (Pin 23): This is a dual function pin. Tying
this pin to SGND, INTVCC or floating it enables forced
continuous mode, pulse-skipping mode or Burst Mode
operation respectively. Applying a clock signal to this pin
causes the internal PLL to synchronize the internal oscilla-
tor to the clock signal and forces forced continuous mode.
The PLL compensation network is integrated on to the IC.
FREQ (Pin 24): Frequency Set/Select Pin. A resistor be-
tween this pin and SGND sets the switching frequency.
This pin sources 20A.
SGND (Exposed Pad Pin 25): Signal Ground. The exposed
pad must be soldered to the PCB ground for electrical con-
nection and rated thermal performance. All small-signal
components and compensation components should be
connected here. Connect to PGND at one point, close to
the IC.
相關(guān)PDF資料
PDF描述
LTC4000IUFD#PBF 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC28
LTC4000EUFD#PBF 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC28
LTC4000EUFD#TRPBF 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC28
LTC4000IUFD#TRPBF 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQCC28
LTC4075XEDD 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10
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