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参数资料
| 型号： | LT3508IUF#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1.4A DL 24QFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.8 V ~ 35.3 V |
| 输入电压： | 3.7 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 920kHz ~ 1.06MHz |
| 电流 - 输出： | 1.4A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 24-QFN 裸露焊盘（4x4） |
LT3508
Dual Monolithic 1.4A
Step-Down Switching
Regulator
FEATURES
DESCRIPTION
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Wide Input Voltage Range: 3.7V to 36V
Two 1.4A Output Switching Regulators with Internal
Power Switches
Adjustable 250kHz to 2.5MHz Switching Frequency
Synchronizable over the Full Frequency Range
Anti-Phase Switching Reduces Ripple
Uses Small Inductors and Ceramic Capacitors
Accurate Programmable Undervoltage Lockout
Independent Tracking, Soft-Start and Power Good
Circuits Ease Supply Sequencing
Output Adjustable Down to 800mV
Small 4mm × 4mm 24-Pin QFN or 16-Pin Thermally
Enhanced TSSOP Surface Mount Packages
The LT ? 3508 is a dual current mode PWM step-down
DC/DC converter with internal power switches capable of
generating two 1.4A outputs. The wide input voltage range
of 3.7V to 36V makes the LT3508 suitable for regulating
power from a wide variety of sources, including automo-
tive batteries, 24V industrial supplies and unregulated wall
adapters. Both converters are synchronized to a single os-
cillator programmable up to 2.5MHz and run with opposite
phases, reducing input ripple current. Its high operating
frequency allows the use of small, low cost inductors and
ceramic capacitors, resulting in low, predictable output
ripple. Each regulator has independent tracking and soft-
start circuits and generates a power good signal when its
output is in regulation, easing power supply sequencing
APPLICATIONS
and interfacing with microcontrollers and DSPs.
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Automotive
DSP Power Supplies
Wall Transformer Regulation
DSL and Cable Modems
PCI Express
Cycle-by-cycle current limit, frequency foldback and ther-
mal shutdown provide protection against shorted outputs,
and soft-start eliminates input current surge during start-
up. The low current (<2μA) shutdown mode enables easy
power management in battery-powered systems.
L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
No R SENSE is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
TYPICAL APPLICATION
3.3V and 5V Dual Output Step-Down Converter with Output Sequencing
V IN
5.6V TO 36V
4.7μF
ON OFF
Ef?ciency
OUT1
6.8μH
0.22μF
V IN1 V IN2
BOOST1
SHDN
BOOST2
0.22μF
10μH
OUT2
5V
1.4A
95
90
V IN = 12V
V OUT2 = 5V
3.3V
1.4A
SW1
SW2
85
V OUT1 = 3.3V
LT3508
35.7k
FB1
FB2
56.2k
80
11.5k
51k
V C1
TRACK/SS1
V C2
PG1
43k
10.7k
10μF
75
22μF
150pF
TRACK/SS2 PG2
GND RT/SYNC
100k
70
1nF
52.3k
f SW = 700kHz
100pF
3508 TA01a
POWER
GOOD
65
0
0.5 1
LOAD CURRENT (A)
1.5
3508 TA01b
3508fd
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3509 | 制造商:LINER 制造商全称:Linear Technology 功能描述:36V 500mA Step-Down Regulator and 200mA LDO |
| LT3509EDE#PBF | 功能描述:IC REG BUCK ADJ 0.7A DL 14DFN 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 |
| LT3509EDE#TRPBF | 功能描述:IC REG BUCK ADJ 0.7A DL 14DFN 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 |
| LT3509EDEPBF | 制造商:Linear Technology 功能描述:Sw. Regulator Dual 700mA 3.6-36V DFN14EP |
| LT3509EDE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual 36V, 700mA Step-Down Regulator |
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