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| 型号： | LT3470AHDDB#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.56 A SWITCHING REGULATOR, PDSO8 |
| 封装： | 3 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-229WECD-1, DFN-8 |
| 文件页数： | 1/20页 |
| 文件大小： | 197K |
| 代理商： | LT3470AHDDB#TRPBF |
LT3470A
1
3470afb
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Micropower Buck Regulator
with Integrated Boost and
Catch Diodes
The LT3470A is a micropower step-down DC/DC con-
verter that integrates a 440mA power switch, catch diode
and boost diode into low profile 2mm × 3mm DFN
package. The LT3470A combines Burst Mode and
continuous operation to allow the use of tiny inductor
and capacitors while providing a low ripple output to
loads of up to 250mA.
With its wide input range of 4V to 40V, the LT3470A can
regulate a wide variety of power sources, from 2-cell Li-Ion
batteries to unregulated wall transformers and lead-acid
batteries. Quiescent current in regulation is just 35μA in
a typical application while a zero current shutdown mode
disconnects the load from the input source, simplifying
power management in battery-powered systems. Fast cur-
rent limiting and hysteretic control protects the LT3470A
and external components against shorted outputs, even
at 40V input. The LT3470A has higher output current and
improved start-up and dropout performance compared
to the LT3470.
Efficiency and Power Loss vs Load Current
n Low Quiescent Current: 35μA at 12VIN to 3.3VOUT
n Integrated Boost and Catch Diodes
n Input Range: 4V to 40V
n 3.3V at 250mA from 4V to 40V Input
n 5V at 250mA from 5.7V to 40V Input
n Low Output Ripple: <10mV
n < 1μA in Shutdown Mode
n Output Voltage: 1.25V to 16V
n Hysteretic Mode Control
– Low Ripple Burst Mode Operation at Light Loads
– Continuous Operation at Higher Loads
n Solution Size as Small as 50mm2
n Low Profile (0.75mm) 2mm × 3mm Thermally
Enhanced 8-Lead DFN Package
n Automotive Battery Regulation
n Power for Portable Products
n Distributed Supply Regulation
n Industrial Supplies
n Wall Transformer Regulation
L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
VIN
BOOST
LT3470A
SW
SHDN
0.22μF
22pF
22μF
2.2μF
VIN
5.7V TO 40V
VOUT
5V
250mA
604k
1%
200k
1%
33μH
BIAS
FB
GND
OFF ON
3470a TA01a
LOAD CURRENT (mA)
30
EFFICIENCY
(%)
POWER
LOSS
(mW)
40
60
80
90
0.1
10
100
300
3470a TA01b
20
1
70
50
10
1
1000
100
10
0.1
VIN = 12V
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3470AIDDB#PBF | 制造商:Linear Technology 功能描述:Bulk |
| LT3470AIDDB#TRMPBF | 功能描述:IC REG BUCK ADJ 0.25A 8DFN 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 |
| LT3470AIDDB#TRPBF | 功能描述:IC REG BUCK ADJ 0.25A 8DFN 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 |
| LT3470AIDDB-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower Buck Regulator with Integrated Boost and Catch Diodes |
| LT3470AIDDB-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower Buck Regulator with Integrated Boost and Catch Diodes |
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