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| 型号： | LT3507IUHF#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/28页 |
| 文件大小： | 302K |
| 描述： | IC REG QD BUCK/LINEAR 38-QFN |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 52 |
| 拓扑： | 降压（降压）（1），线性（LDO）（1） |
| 功能： | 任何功能 |
| 输出数： | 4 |
| 频率 - 开关： | 900kHz ~ 1.1MHz |
| 电压/电流 - 输出 1： | 0.8 V ~ 32.4 V，2.4A |
| 电压/电流 - 输出 2： | 0.8 V ~ 32.4 V，1.5A |
| 电压/电流 - 输出 3： | 0.8 V ~ 32.4 V，1.5A |
| 带 LED 驱动器： | 无 |
| 带监控器： | 无 |
| 带序列发生器： | 是 |
| 电源电压： | 4 V ~ 36 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 38-WFQFN 裸露焊盘 |
| 供应商设备封装： | 38-QFN（5x7） |
| 包装： | 管件 |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
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LT3507
1
3507fa
FEATURES
APPLICATIONS
DESCRIPTION
Triple Monolithic Step-Down
Regulator with LDO
The LT
?/DIV>
3507 is a triple, current mode, DC/DC converter
with internal power switches and a low dropout regulator.
The switching converters are step-down converters capable
of generating one 2.4A output and two 1.5A outputs. All
three converters are synchronized to a single oscillator.
The 2.4A output runs with opposite phase to the other two
converters, reducing input ripple current. Each regulator
has independent shutdown and soft-start circuits, and
generates a power good signal when its output is in regu-
lation, easing power supply sequencing and interfacing
with microcontrollers and DSPs.
The switching frequency is set with a single resistor yielding
a range of 250kHz to 2.5MHz. The high switching frequency
allows the use of small inductors and capacitors resulting
in a very small triple output supply. The constant switching
frequency, combined with low impedance ceramic capaci-
tors, results in low, predictable output ripple. With its wide
input voltage range of 4V to 36V, the LT3507 regulates a
broad array of power sources including 5V logic rails,
unregulated wall transformers, lead acid batteries and
distributed power supplies.
n
Wide Input Range: 4V to 36V
n
One 2.4A and Two 1.5A Output Switching
Regulators with Internal Power Switches
n
Low Dropout Linear Regulator with External
Transistor
n
Antiphase Switching Reduces Ripple
n
Independent Run, Tracking/Soft-Start, and Power
Good Indicators Ease Supply Sequencing
n
Uses Small Inductors and Ceramic Capacitors
n
Adjustable, 250kHz to 2.5MHz Switching Frequency,
Synchronizable Over the Full Range
n
User Programmable Overvoltage and Undervoltage
Lockouts
n
Thermally Enhanced, 38-Lead 5mm ?7mm QFN
Package
n
DSL and Cable Modems
n
Distributed Power Regulation
n
DSP Power
n
Automotive
TYPICAL APPLICATION
V
IN1
BOOST1
BOOST3
SW3
FB3
V
C3
BIAS
DRIVE
FB4
SW1
FB1
V
C1
BOOST2
0.22糉
10.2k
53.6k
V
IN
6V TO 36V
V
OUT3
5V
1.5A
V
IN2
V
IN3
SW2
FB2
V
C2
GND
LT3507
22糉
24.3k
3507 TA01a
107k
11.5k
V
OUT2
3.3V
1.3A
V
OUT4
2.5V
0.2A
R
T
/SYNC
680pF
15糎
2.2糉
22糉
f
SW
= 450kHz
0.22糉
0.22糉
15k
18.7k
V
OUT1
1.8V
2.4A
100糉
18.7k
680pF
4.7糎
24.3k
1000pF
16.2k
11.5k
35.7k
10糎
22糉
V
OUT2
Start-Up WaveformsCoincident Tracking
5V, 3.3V, 2.5V and 1.8V Step-Down Regulator
1V/DIV
V
OUT1
V
OUT2
V
OUT3
V
OUT4
1ms/DIV
3507 TA01b
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3507IUHF-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple Monolithic Step-Down Regulator with LDO |
| LT3508 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Monolithic 1.4A Step-Down Switching Regulator |
| LT3508EFE#PBF | 功能描述:IC REG BUCK ADJ 1.4A DL 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LT3508EFE#TRPBF | 功能描述:IC REG BUCK ADJ 1.4A DL 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT3508EFEPBF | 制造商:Linear Technology 功能描述:Dual 1.4A Step-Down Regulator LT3508 |
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