參數(shù)資料
型號： LT3507HUHF#TRPBF
廠商： Linear Technology
文件頁數(shù)： 7/28頁
文件大小： 302K
描述： IC REG QD BUCK/LINEAR 38-QFN
產(chǎn)品培訓(xùn)模塊： More Information on LDOs
標準包裝： 2,500
拓撲： 降壓（降壓）（1），線性（LDO）（1）
功能： 任何功能
輸出數(shù)： 4
頻率 - 開關(guān)： 900kHz ~ 1.1MHz
電壓/電流 - 輸出 1： 0.8 V ~ 32.4 V，2.4A
電壓/電流 - 輸出 2： 0.8 V ~ 32.4 V，1.5A
電壓/電流 - 輸出 3： 0.8 V ~ 32.4 V，1.5A
帶 LED 驅(qū)動器： 無
帶監(jiān)控器： 無
帶序列發(fā)生器： 是
電源電壓： 4 V ~ 36 V
工作溫度： -40°C ~ 150°C
安裝類型： 表面貼裝
封裝/外殼： 38-WFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 38-QFN（5x7）
包裝： 帶卷 (TR)
LT3507
7
3507fa
PIN FUNCTIONS
BOOST1, BOOST2, BOOST3 (Pins 1, 27, 32): The BOOST 
pins are used to provide drive voltages, higher than the
input voltage, to the internal bipolar NPN power switches.
These pins must be tied through a diode from V
OUT
, V
IN
 
or another supply greater than 2.5V.
V
IN1
 (Pins 2, 3): The V
IN1
 pins supply power to the internal
switch of the 2.4A regulator and to the LT3507s internal
reference and start-up circuitry. These pins must be locally
bypassed (Note 6).
V
INSW
 (Pin 4): The V
INSW
 pin is a switched V
IN1
 for the
user programmable undervoltage and overvoltage detec-
tion. It is connected to V
IN1
 when any of the RUN pins
are pulled high, and high impedance when all RUN pins
are low or open.
OVLO (Pin 5): The LT3507 goes into overvoltage shutdown 
when this pin goes above 1.2V. If unused, the OVLO pin
should be tied to GND.
UVLO (Pin 6): The LT3507 goes into undervoltage shutdown 
when this pin drops below 1.2V. If unused, the UVLO pin
should be tied to V
INSW
.
V
C1
, V
C2
, V
C3
 (Pins 7, 23, 19): 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.
TRK/SS1, TRK/SS2, TRK/SS3, TRK/SS4 (Pins 8, 21, 18,
26): The TRK/SS pins allow a regulator to track the output 
of another regulator. When the TRK/SS pin is below 0.8V,
the FB pin regulates to the TRK/SS voltage. This pin can
also be used as a soft-start by connecting a capacitor from
TRK/SS to ground. The TRK/SS pins should be left open
if neither feature is used.
FB1, FB2, FB3 (Pins 9, 22, 20): The FB pins are the nega-
tive inputs of the error ampli ers. The LT3507 regulates
each feedback pin to the lesser of 0.8V or the TRK/SS
pin voltage. Connect the feedback resistor divider taps
to these pins.
Note 6: V
INX
 pins that are connected together may share a bypass capacitor.
PGOOD1, PGOOD2, PGOOD3 (Pins 10, 11, 12): The 
PGOOD pins are the open-collector outputs of an internal
comparator. PGOOD remains low until the FB pin is within
10% of the  nal regulation voltage. As well as indicating
output regulation, the PGOOD pins can sequence the
switching regulators. These pins must be left unconnected
if unused. The PGOOD outputs are valid when V
IN
 is greater
than 3.5V and any of the RUN pins are high. They are not
valid when all RUN pins are low.
R
T
/SYNC (Pin 13): The R
T
/SYNC pin requires a resistor
to ground or a clock signal to set the operating frequency
of the LT3507.
RUN1, RUN2, RUN3 (Pins 14, 15, 16): The RUN pins are 
used to shut down the individual switching regulators.
When all three RUN pins are low, the LT3507 shuts down
and draws less than 1糀 from V
IN1
.
BIAS (Pin 17): The BIAS pin supplies the current to the 
LT3507s internal regulator. This pin should be tied to the
lowest available voltage source above 3V (either V
IN
, V
OUT
 
or any other available supply). The LDO pass transistors
base current is supplied from the BIAS pin if it is at least
0.8V above the LDO DRIVE output.
DRIVE (Pin 24): The DRIVE pin provides the base drive for 
an external NPN transistor used for the LDO regulator.
FB4 (Pin 25): The FB4 pin is the negative input to the LDO 
error ampli er. It is regulated to 0.8V through the LDO
feedback resistor divider.
V
IN2
 (Pins 30, 31)/V
IN3
 (Pins 35, 36 ): The V
IN2
 and V
IN3
 
pins supply power to the internal switches of the 1.5A con-
verters. These pins must be locally bypassed (Note 6).
SW1 (Pins 37, 38)/SW2 (Pins 28, 29)/SW3 (Pins 33,
34): The SW pins are the outputs of the internal power 
switches. Connect these pins to the inductors and switch-
ing diodes.
Exposed Pad (Pin 39): 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 a grounded
pad on the circuit board for proper operation.
相關(guān)PDF資料
PDF描述
LT3570IFE#TRPBF IC REG BUCK/BST/LINEAR 20TSSOP
LT3645HMSE#TRPBF IC REG DL BUCK/LINEAR 12-MSOP
LT3694IFE-1#TRPBF IC REG TRPL BUCK/LINEAR 20TSSOP
LT4220IGN#TR IC CTLR HOTSWAP DUAL 16-SSOP
LT4250LCN8 IC CONTRLR HOT SWAP NEG 48V 8DIP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT3507IUHF#PBF 功能描述:IC REG QD BUCK/LINEAR 38-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 + 切換式 系列:- 標準包裝:2,500 系列:- 拓撲:降壓（降壓）同步（3），線性（LDO）（2） 功能:任何功能 輸出數(shù):5 頻率 - 開關(guān):300kHz 電壓/電流 - 輸出 1:控制器 電壓/電流 - 輸出 2:控制器 電壓/電流 - 輸出 3:控制器 帶 LED 驅(qū)動器:無 帶監(jiān)控器:無 帶序列發(fā)生器:是 電源電壓:5.6 V ~ 24 V 工作溫度:-40°C ~ 85°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:*
LT3507IUHF#TRPBF 功能描述:IC REG QD BUCK/LINEAR 38-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 + 切換式 系列:- 標準包裝:2,500 系列:- 拓撲:降壓（降壓）同步（3），線性（LDO）（2） 功能:任何功能 輸出數(shù):5 頻率 - 開關(guān):300kHz 電壓/電流 - 輸出 1:控制器 電壓/電流 - 輸出 2:控制器 電壓/電流 - 輸出 3:控制器 帶 LED 驅(qū)動器:無 帶監(jiān)控器:無 帶序列發(fā)生器:是 電源電壓:5.6 V ~ 24 V 工作溫度:-40°C ~ 85°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:*
LT3507IUHFPBF 制造商:Linear Technology 功能描述:Triple Voltage Regulator QFN38EP
LT3507IUHF-PBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:Triple Monolithic Step-Down Regulator with LDO
LT3507IUHF-TRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:Triple Monolithic Step-Down Regulator with LDO
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*