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参数资料
| 型号： | LT3473EDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 1A 8DFN |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 34V |
| 输入电压： | 2.2 V ~ 16 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1.2MHz |
| 电流 - 输出： | 1A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-DFN-EP（3x3） |
LT3473/LT3473A
Micropower 1A Boost
Converter with Schottky
and Output Disconnect
FEATURES
DESCRIPTIO
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Tiny Solution Size
Low Quiescent Current:
150 μ A in Active Mode (V IN = 3.6V, V OUT = 15V,
No Load)
1 μ A in Shutdown Mode
Internal 1A, 36V Switch
Integrated Schottky Diode
Integrated PNP Output Disconnect
Internal Reference Override Pin
PGOOD Pin
25V at 80mA from 3.6V Input
Auxiliary NPNs for Intermediate
Bias Voltages (LT3473A)
Automatic Burst Mode ? Operation at Light Load
Constant Switching Frequency: 1.2MHz
Thermal Shutdown
Input Range: 2.2V to 16V
Low Profile (3mm × 3mm) DFN Package (LT3473)
Low Profile (4mm × 3mm) DFN Package (LT3473A)
The LT ? 3473/LT3473A are micropower step-up DC/DC
converters with integrated Schottky diode and output
disconnect circuitry in low profile DFN packages. The
small package size, high level of integration and the use of
tiny SMT components yield a solution size of less than
50mm 2 . The internal 1A switch allows the device to deliver
25V at up to 80mA from a Li-Ion cell, while automatic Burst
Mode operation maintains efficiency at light load. An
auxiliary reference input (CTRL) allows the user to over-
ride the internal 1.25V feedback reference with any lower
value, allowing full control of the output voltage during
operation. A PGOOD pin sinks current when the output
voltage reaches 90% of final value.
The LT3473A includes two NPN transistors for generating
intermediate bias voltages from the output and is offered
in a 12-lead (4mm × 3mm) DFN package. The LT3473
does not include these NPNs and is offered in an 8-lead
(3mm × 3mm) package.
APPLICATIO S
The rugged 36V switch and output disconnect circuitry
allow outputs up to 34V to be easily generated in a simple
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OLED Bias
CCD Bias
boost topology.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
Conversion Efficiency and Power Loss vs Output Current
80
V IN = 3.6V
V OUT = 15V
500
PGOOD
OUT
V OUT
25V
75
400
V IN
3V TO 4.2V
6.8 μ H
CTRL
SW
V IN
LT3473
CAP
2M
2.2 μ F 80mA
70
65
300
200
4.7 μ F
SHDN
GND
FB
100k
0.47 μ F
60
100
3473 TA01a
55
0.1
1
10
0
100
OUTPUT CURRENT (mA)
3473 TA01b
3473f
1
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相关代理商/技术参数 |
参数描述 |
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| LT3474 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Full-Featured LED Driver with 1.5A Switch Current |
| LT3474-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Step-Down 1A LED Driver |
| LT3474EFE | 制造商:Linear Technology 功能描述:LED DRVR 1Segment 5V/9V/12V/15V/18V/24V 16-Pin TSSOP EP |
| LT3474EFE#PBF | 功能描述:IC LED DRVR HP CONS CURR 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:60 系列:- 恒定电流:- 恒定电压:- 拓扑:线性（LDO），PWM，升压（升压） 输出数:8 内部驱动器:是 类型 - 主要:背光 类型 - 次要:RGB，白色 LED 频率:500kHz ~ 1.5MHz 电源电压:4.75 V ~ 26 V 输出电压:45V 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* 工作温度:-40°C ~ 85°C |
| LT3474EFE#TR | 制造商:Linear Technology 功能描述:LED DRVR 1Segment 5V/9V/12V/15V/18V/24V 16-Pin TSSOP EP T/R |
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