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参数资料
| 型号： | LT3508IUF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3.2 A DUAL SWITCHING CONTROLLER, 1060 kHz SWITCHING FREQ-MAX, PQCC24 |
| 封装： | 4 X 4 MM, PLASTIC, MO-220WGGD-X, QFN-24 |
| 文件页数： | 1/24页 |
| 文件大小： | 365K |
| 代理商： | LT3508IUF |
LT3508
1
3508f
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Dual Monolithic 1.4A
Step-Down Switching
Regulator
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
and interfacing with microcontrollers and DSPs.
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.
3.3V and 5V Dual Output Step-Down Converter with Output Sequencing
■ 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
■ Automotive
■ DSP Power Supplies
■ Wall Transformer Regulation
■ DSL and Cable Modems
■ PCI Express
VIN
5.6V TO 36V
BOOST2
LT3508
VIN
SHDN
GND
3508 TA01a
RT/SYNC
100pF
10
F
22
F
4.7
F
0.22
F
0.22
F
ON OFF
43k
150pF
51k
10.7k
52.3k
fSW = 700kHz
35.7k
100k
56.2k
11.5k
10
H
6.8
H
POWER
GOOD
OUT2
5V
1.4A
OUT1
3.3V
1.4A
1nF
BOOST1
SW2
SW1
FB2
FB1
VC2
PG1
VC1
TRACK/SS1
PG2
TRACK/SS2
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
LOAD CURRENT (A)
0
65
EFFICIENCY
(%)
70
75
80
85
95
0.5
1
3508 TA01b
1.5
90
VIN = 12V
VOUT2 = 5V
VOUT1 = 3.3V
Efciency
相关PDF资料 |
PDF描述 |
|---|---|
| LT3508IFE#TR | 3.2 A DUAL SWITCHING CONTROLLER, 1060 kHz SWITCHING FREQ-MAX, PDSO16 |
| LT3508EUF | 3.2 A DUAL SWITCHING CONTROLLER, 1060 kHz SWITCHING FREQ-MAX, PQCC24 |
| LT3509HMSE#TRPBF | 1.2 A DUAL SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO16 |
| LT3509IMSE#PBF | 1.2 A DUAL SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO16 |
| LT3509IMSE#TRPBF | 1.2 A DUAL SWITCHING CONTROLLER, 2500 kHz SWITCHING FREQ-MAX, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3508IUF#PBF | 功能描述:IC REG BUCK ADJ 1.4A DL 24QFN 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 |
| LT3508IUF#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BUCK 1MHZ Q 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, 1MHZ, QFN-24 |
| LT3508IUF#TRPBF | 功能描述:IC REG BUCK ADJ 1.4A DL 24QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3508IUF-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Monolithic 1.4A Step-Down Switching Regulator |
| LT3508IUF-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Monolithic 1.4A Step-Down Switching Regulator |
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