參數(shù)資料
型號(hào)： LT3493IDCB#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 2.2 A SWITCHING REGULATOR, 815 kHz SWITCHING FREQ-MAX, PDSO6
封裝： 2 X 3 MM, LEAD FREE, PLASTIC, MO-229, DFN-6
文件頁(yè)數(shù)： 17/20頁(yè)
文件大?。?/td> 588K
代理商： LT3493IDCB#PBF
LT3493
6
3493fb
BLOCK DIAGRAM
PIN FUNCTIONS
FB (Pin 1): The LT3493 regulates its feedback pin to
780mV. Connect the feedback resistor divider tap to this
pin. Set the output voltage according to VOUT = 0.78V
(1 + R1/R2). A good value for R2 is 10k.
GND (Pin 2): Tie the GND pin to a local ground plane
below the LT3493 and the circuit components. Return the
feedback divider to this pin.
BOOST (Pin 3): The BOOST pin is used to provide a drive
voltage, higher than the input voltage, to the internal bipolar
NPN power switch.
SW (Pin 4): The SW pin is the output of the internal power
switch. Connect this pin to the inductor, catch diode and
boost capacitor.
VIN (Pin 5): The VIN pin supplies current to the LT3493’s
internal regulator and to the internal power switch. This
pin must be locally bypassed.
SHDN (Pin 6): The SHDN pin is used to put the LT3493 in
shutdown mode. Tie to ground to shut down the LT3493.
Tie to 2.3V or more for normal operation. If the shutdown
feature is not used, tie this pin to the VIN pin. SHDN also
provides a soft-start function; see the Applications Infor-
mation section.
Exposed Pad (Pin 7): The Exposed Pad must be soldered
to the PCB and electrically connected to ground. Use a
large ground plane and thermal vias to optimize thermal
performance.
1
R
DRIVER
Q1
S
OSC
SLOPE
COMP
FREQUENCY
FOLDBACK
INT REG
AND
UVLO
VC
gm
780mV
3493 BD
2
5
6
Q
3
4
BOOST
SW
FB
R2
R1
VOUT
L1
D2
C3
C1
D1
VIN
C2
VIN
ON OFF
GND
C4
R3
SHDN
相關(guān)PDF資料
PDF描述
LT3493EDCB#TRM 2.2 A SWITCHING REGULATOR, 815 kHz SWITCHING FREQ-MAX, PDSO6
LT3493EDCB#TR 2.2 A SWITCHING REGULATOR, 815 kHz SWITCHING FREQ-MAX, PDSO6
LT3513EUHF#TRPBF 3.5 A SWITCHING REGULATOR, 2220 kHz SWITCHING FREQ-MAX, PQCC38
LT3513EUHF#PBF 3.5 A SWITCHING REGULATOR, 2220 kHz SWITCHING FREQ-MAX, PQCC38
LT3513IUHF#TRPBF 3.5 A SWITCHING REGULATOR, 2220 kHz SWITCHING FREQ-MAX, PQCC38
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