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參數資料
| 型號： | LT3470AHDDB#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | 0.56 A SWITCHING REGULATOR, PDSO8 |
| 封裝： | 3 X 2 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, MO-229WECD-1, DFN-8 |
| 文件頁數： | 1/20頁 |
| 文件大小： | 197K |
| 代理商： | LT3470AHDDB#PBF |
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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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關:2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應商設備封裝:6-SON（1.45x1） 產品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LT3470AIDDB#TRPBF | 功能描述:IC REG BUCK ADJ 0.25A 8DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:10-MSOP 裸露焊盤 |
| LT3470AIDDB-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Micropower Buck Regulator with Integrated Boost and Catch Diodes |
| LT3470AIDDB-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Micropower Buck Regulator with Integrated Boost and Catch Diodes |
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