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參數(shù)資料
| 型號： | LT1941EFE |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Triple Monolithic Switching Regulator |
| 中文描述： | 6 A SWITCHING REGULATOR, 1350 kHz SWITCHING FREQ-MAX, PDSO28 |
| 封裝： | 4.40 MM, PLASTIC, TSSOP-28 |
| 文件頁數(shù)： | 7/24頁 |
| 文件大?。?/td> | 336K |
| 代理商： | LT1941EFE |
7
LT1941
1941f
PIU
V
IN
(Pins 1, 2, 22, 25):
The V
IN
pins supply current to the
LT1941’s internal circuitry and to the internal power
switches. These pins must be tied to the same source and
locally bypassed.
SW1, SW2, SW3 (Pins 3, 4, 23, 27):
The SW pins are the
outputs of the internal power switches. Connect these pins
to the inductors and switching diodes.
BOOST1, BOOST2 (Pins 5, 24):
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 V
OUT
or from V
IN
.
PGOOD1, PGOOD2, PGOOD3 (Pins 6, 9, 21):
The PGOOD
pins are the open-collector outputs of an internal com-
parator. PGOOD remains low until the FB pin is within 10%
of the final regulation voltage. As well as indicating output
regulation, the PGOOD pins can sequence the switching
regulators. Leave these pins unconnected if unused. The
PGOOD outputs are valid when V
IN
is greater than 3.5V and
any of the RUN/SS pins are high. They are
not
valid when
all RUN/SS pins are low.
V
C1
, V
C2
, V
C3
(Pins 7, 10, 18):
The V
C
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. Each switching
regulator can be shut down by pulling its respective V
C
pin
to ground with an NMOS or NPN transistor.
FB1, FB2, FB3 (Pins 8, 11, 20):
The LT1941 regulates each
feedback pin to either 0.628V (FB1, FB2) or 1.25V (FB3).
Connect the feedback resistor divider taps to these pins.
RUN/SS1, RUN/SS2, RUN/SS3 (Pins 12, 13, 14):
The
RUN/SS pins are used to shut down the individual switch-
ing regulators and the internal bias circuits. They also
provide a soft-start function. To shut down either regula-
tor, pull the RUN/SS pin to ground with an open drain or
collector. Tie a capacitor from this pin to ground to limit
switch current during start-up. If neither feature is used,
leave these pins unconnected.
BIAS1 (Pin 15):
The BIAS1 pin supplies the current to the
LT1941’s internal regulator. Tie this pin to the lowest
available voltage source above 2.35V (Either V
IN
, V
OUT
or
any other available supply).
12GOOD (Pin 16):
The 12GOOD pin is the open-collector
output of an internal comparator. 12GOOD remains low
until V
IN
is within 10% of 12V. The pin pulls low when the
part is in shutdown. Leave this pin unconnected if unused.
5GOOD (Pin 17):
The 5GOOD pin is the open-collector
output of an internal comparator. 5GOOD remains low
until V
IN
is within 10% of 5V. The pin pulls low when the
part is in shutdown. Leave this pin unconnected if unused.
NFB (Pin 19):
The LT1941 contains an op amp configured
with an output at FB3, noninverting terminal at GND and an
inverting terminal at NFB. Connect the feedback resistor
network virtual ground at this node if regulating negative
voltages. Otherwise, tie this node to FB3.
PGND (Pin 26):
Tie directly to local ground plane.
BIAS2 (Pin 28):
The BIAS2 pin supplies the current to the
driver of SW3. Tie this pin to the lowest available voltage
source above 2.5V (Either V
IN
, V
OUT
or any other available
supply).
Exposed Pad (Pin 29):
Ground. The underside Exposed
Pad metal 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.
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| LT1941EFE#PBF | 功能描述:IC REG MULTI CONFIG TRPL 28TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓(xùn)模塊:MIC23xxx HyperLight Load™ Regulators 標(biāo)準(zhǔn)包裝:5,000 系列:HyperLight Load® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.8V 輸入電壓:2.7 V ~ 5.5 V PWM 型:混合物 頻率 - 開關(guān):4MHz 電流 - 輸出:2A 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-VFDFN 裸露焊盤，8-MLF? 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-MLF?（2x2） 產(chǎn)品目錄頁面:1094 (CN2011-ZH PDF) 其它名稱:576-3303-2 |
| LT1941EFE#TR | 功能描述:IC REG MULTI CONFIG TRPL 28TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
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