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參數(shù)資料
| 型號： | LTC3443 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 700mA Low Noise High Current LED Charge Pump |
| 中文描述： | 700mA的低噪音，高電流LED電荷泵 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 162K |
| 代理商： | LTC3443 |
LTC3215
1
3215f
TYPICAL APPLICATIO
U
APPLICATIU
FEATURES
DESCRIPTIOU
The LTC
3215 is a low noise, high current charge pump
DC/DC converter designed to power high current LEDs.
The part includes an accurate programmable current
source capable of driving loads up to 700mA from a 2.9V
to 4.4V input. Low external parts count (two flying capaci-
tors, one programming resistor and two bypass capaci-
tors) makes the LTC3215 ideally suited for small, battery-
powered applications.
Built-in soft-start circuitry prevents excessive inrush cur-
rent during start-up. High switching frequency enables the
use of small external capacitors. LED current is pro-
grammed with an external resistor. The LED is discon-
nected from V
IN
during shutdown.
An ultralow dropout current source maintains accurate
LED current at very low I
LED
voltages. Automatic mode
switching optimizes efficiency by monitoring the voltage
across the LED current source and switching modes only
when I
LED
dropout is detected. The LTC3215 is available in
a low profile 3mm
×
3mm 10-Lead DFN package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
*Protected by U.S. Patent 6411531.
■
LED Torch/Camera Light Supply for Cell Phones,
PDAs and Digital Cameras
■
General Lighting and/or Flash/Strobe Applications
■
High Efficiency Operation: 1x, 1.5x or 2x Boost
Modes with Automatic Mode Switching
■
Ultralow Dropout I
LED
Current Control
■
Output Current up to 700mA
■
Low Noise Constant Frequency Operation*
■
Wide V
IN
Range: 2.9V to 4.4V
■
Open/Shorted LED Protection
■
LED Disconnect in Shutdown
■
Low Shutdown Current: 2.5
μ
A
■
4% LED Current Programming Accuracy
■
Automatic Soft-Start Limits Inrush Current
■
No Inductors
■
Tiny Application Circuit (All Components <1mm
Profile)
■
3mm
×
3mm 10-Lead DFN Package
700mA Low Noise High
Current LED Charge Pump
Efficiency vs V
IN
C1
2.2
μ
F
C2
2.2
μ
F
C
IN
2.2
μ
F
C
CPO
4.7
μ
F
I
200mA
LED1
I
LED
V
IN
2.9V TO 4.4V
EN
DISABLE ENABLE
LTC3215
C1
+
C1
–
C2
+
C2
–
I
SET
3215 TA01a
LED1: AOT2015 HPW 1751B
CPO
20k
1%
V
IN
(V)
2.8
E
L
/
I
)
100
90
80
70
60
50
40
30
20
10
0
3.2
3.6
3.8
3215 TA01b
3.0
3.4
4.0
4.2
4.4
LED = AOT2015 HPW 1751B
V
F
= 3V TYP AT 200mA
I
LED
= 200mA
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| LTC3443EDE | 功能描述:IC REG BUCK BOOST SYNC ADJ 12DFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):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(guān):- 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(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LTC3443EDE#PBF | 功能描述:IC REG BUCK BOOST SYNC ADJ 12DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):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(guān):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(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LTC3443EDE#TR | 功能描述:IC REG BUCK BOOST SYNC ADJ 12DFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):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(guān):- 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(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LTC3443EDE#TRPBF | 功能描述:IC REG BUCK BOOST SYNC ADJ 12DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):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(guān):- 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(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LTC3444 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Effi ciency, Synchronous, 4-Switch Buck-Boost Controller |
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