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参数资料
型号： LT3507AIUHF#PBF
厂商： LINEAR TECHNOLOGY CORP
元件分类： 稳压器
英文描述： SWITCHING REGULATOR, PQCC38
封装： 5 X 7 MM, LEAD FREE, PLASTIC, QFN-38
文件页数： 1/28页
文件大小： 372K
代理商： LT3507AIUHF#PBF
LT3507A
1
3507af
FEATURES
APPLICATIONS
DESCRIPTION
Triple Monolithic Step-Down
Regulator with LDO
The LT3507A is a triple, current mode, DC/DC converter
with internal power switches and a low dropout regulator.
Theswitchingconvertersarestep-downconverterscapable
of generating one 2.7A output and two 1.8A outputs. All
three converters are synchronized to a single oscillator.
The 2.7A 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.
Theswitchingfrequencyissetwithasingleresistoryielding
arangeof250kHzto2.5MHz.Thehighswitchingfrequency
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. Frequency
foldbackandthermalshutdownprovideprotectionagainst
fault conditions. The LT3507A provides higher output cur-
rent than available with the LT3507.
n
Wide Input Range: 4V to 36V
n
One 2.7A and Two 1.8A 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 TSSOP and
5mm
× 7mm QFN Packages
n
Automotive
n
Industrial Supplies
n
Distributed Power Regulation
n
DSP Power
TYPICAL APPLICATION
VIN1
BOOST1
BOOST3
SW3
FB3
VC3
BIAS
DRIVE
FB4
SW1
FB1
VC1
BOOST2
0.22F
10.2k
53.6k
VIN
6V TO 36V
VOUT3
5V
1.8A
VIN2 VIN3
SW2
FB2
VC2
GND
LT3507A
22F
25.5k
3507A TA01a
107k
11.5k
VOUT2
3.3V
1.5A
VOUT4
2.5V
0.3A
RT/SYNC
680pF
15H
2.2F
33F
fSW = 450kHz
0.22F
15k
18.7k
VOUT1
1.8V
2.7A
100F
680pF
25.5k
4.7H
24.3k
680pF
25.5k
11k
34.8k
10H
22F
VOUT2
Start-Up Waveforms—Coincident Tracking
5V, 3.3V, 2.5V and 1.8V Step-Down Regulator
1V/DIV
VOUT1
VOUT2
VOUT3
VOUT4
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
LT3507EUHF#2ESPBF 制造商:Linear Technology 功能描述:TRIPLE MONOLITHIC STEP-DOWN REGULATOR WITH LDO
LT3507EUHF#PBF 功能描述:IC REG QD BUCK/LINEAR 38-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压（降压）同步（3），线性（LDO）（2） 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:*
LT3507EUHF#TRPBF 功能描述:IC REG QD BUCK/LINEAR 38-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 线性 + 切换式 系列:- 标准包装:2,500 系列:- 拓扑:降压（降压）同步（3），线性（LDO）（2） 功能:任何功能 输出数:5 频率 - 开关:300kHz 电压/电流 - 输出 1:控制器 电压/电流 - 输出 2:控制器 电压/电流 - 输出 3:控制器 带 LED 驱动器:无 带监控器:无 带序列发生器:是 电源电压:5.6 V ~ 24 V 工作温度:-40°C ~ 85°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:*
LT3507EUHFPBF 制造商:Linear Technology 功能描述:Step Down Regulator with LDO
LT3507EUHF-PBF 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple Monolithic Step-Down Regulator with LDO
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