參數(shù)資料
型號(hào)： LT3506IDHD#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 3.6 A SWITCHING REGULATOR, 650 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 5 X 4 MM, PLASTIC, MO-229WJGD-2, DFN-16
文件頁(yè)數(shù)： 20/24頁(yè)
文件大?。?/td> 210K
代理商： LT3506IDHD#TR
LT3506/LT3506A
5
3506afc
Frequency vs Temperature
IRUN/SS vs Temperature
RUN/SS Thresholds
vs Temperature
BOOST1 (Pin 1), BOOST2 (Pin 8): The BOOST pins are
used to provide drive voltages, higher than the input
voltage, to the internal bipolar NPN power switches. Tie
through a diode from VOUT or from VIN.
SW1 (Pin 2), SW2 (Pin 7): The SW pins are the outputs
of the internal power switches. Connect these pins to the
inductors, catch diodes and boost capacitors.
VIN1(Pins3,4):TheVIN1pinssupplycurrenttotheLT3506’s
internal regulator and to the internal power switch con-
nected to SW1. These pins must be locally bypassed.
VIN2 (Pins 5, 6): The VIN2 pins supply current to the inter-
nal power switch connected to SW2 and must be locally
bypassed. Connect these pins directly to VIN1 unless power
for channel 2 is coming from a different source.
RUN/SS1 (Pin 13), RUN/SS2 (Pin 12): The RUN/SS pins
are used to shut down the individual switching regula-
tors and the internal bias circuits. They also provide a
soft-start function. To shut down either regulator, pull the
RUN/SS pin to ground with an open drain or collector.
Tie a capacitor from these pins to ground to limit switch
current during start-up. If neither feature is used, leave
these pins unconnected.
PG1 (Pin 14), PG2 (Pin 11): The Power Good pins are
the open collector outputs of an internal comparator. PG
remains low until the FB pin is within 10% of the nal
regulation voltage. As well as indicating output regulation,
the PG pins can be used to sequence the two switching
regulators. These pins can be left unconnected. The PG
outputs are valid when VIN is greater than 3.4V and either
of the RUN/SS pins is high. The PG comparators are
disabled in shutdown.
VC1 (Pin 15), VC2 (Pin 10): The VC pins are the outputs of
the internal error amps. The voltages on these pins control
the peak switch currents. These pins are normally used
to compensate the control loops, but can also be used to
override the loops. Pull these pins to ground with an open
drain to shut down each switching regulator.
FB1 (Pin 16), FB2 (Pin 9): The LT3506 regulates each
feedback pin to 800mV. Connect the feedback resistor
divider taps to these pins.
Exposed Pad (Pin 17): The Exposed Pad of the package
provides both electrical contact to ground and good thermal
contact to the printed circuit board. The Exposed Pad must
be soldered to the circuit board for proper operation.
TYPICAL PERFORMANCE CHARACTERISTICS
TEMPERATURE (°C)
–50
FREQUENCY
(kHz)
700
650
600
550
500
FREQUENCY
(MHz)
1.20
1.15
1.10
1.05
1.00
–25
0
25
50
3506 G10
75
100
125
LT3506A
LT3506
TEMPERATURE (°C)
–50
0
RUN/SS
CURRENT
(μA)
0.5
1.0
1.5
2.0
3.0
–25
025
50
3506 G12
75
100
125
2.5
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
RUNN/SS
THRESHOLDS
(V)
TEMPERATURE (°C)
–50
25
75
3506 G13
–25
0
50
100
125
TO SWITCH
TO RUN
PIN FUNCTIONS
相關(guān)PDF資料
PDF描述
LT3506IDHD 3.6 A SWITCHING REGULATOR, 650 kHz SWITCHING FREQ-MAX, PDSO16
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