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参数资料
| 型号： | LT3472EDD#TR |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST INV ADJ 50MA 10DFN |
| 标准包装： | 2,500 |
| 类型： | 升压（升压），反相 |
| 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 |
| 频率 - 开关： | 1.1MHz |
| 电流 - 输出： | 50mA |
| 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： | 10-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-DFN（3x3） |
LT3472
Boost and Inverting
DC/DC Converter
for CCD Bias
FEATURES
DESCRIPTIO
■
■
■
■
■
■
■
■
■
Generates 15V at 20mA, –8V at 50mA
from a Li-Ion Cell
Internal Schottky Diodes
V IN Range: 2.2V to 16V
Output Voltages Up to ± 34V
Capacitor-Programmable Soft-Start
Sequencing: Positive Output Reaches 88% of Final
Value Before Negative Output Begins
Requires Only One Resistor to Set Output Voltage
Constant Switching Frequency Ensures Low
Noise Outputs
Available in a 10-Lead (3mm × 3mm) DFN Package
The LT ? 3472 dual channel switching regulator generates
positive and negative outputs for biasing CCD imagers.
The device delivers up to –8V at 50mA and 15V at 20mA
from a lithium-ion cell, providing bias for many popular
CCD imagers. Switching at 1.1MHz, the LT3472 uses tiny,
low profile capacitors and inductors and generates low
noise outputs that are easy to filter. Schottky diodes are
internal and the output voltages are set with one resistor
per channel, reducing external component count. The
entire solution is less than 1mm profile and occupies just
50mm 2 .
Internal sequencing circuitry disables the negative chan-
APPLICATIO S
nel until the positive channel has reached 88% of its final
value, ensuring that the sum of the two outputs is always
■
■
■
■
CCD Bias
TFT LCD Bias
OLED Bias
± Rail Generation for Op Amps
, LTC and LT are registered trademarks of Linear Technology Corporation.
positive. Separate soft-start capacitors for each output
allow the ramp of each output to be independently
controlled.
The LT3472 is available in a low profile (0.75mm) 10-pin
3mm × 3mm DFN package.
TYPICAL APPLICATIO
Li-Ion CCD Bias Supply
V IN
3V TO 4.2V
2.2 μ F
85
Conversion Efficiency
22 μ H
47 μ H
1 μ F
80
POS CHANNEL
75
V POS
15V
20mA
550k
4.7pF
SWP
V POS
FBP
V IN
LT3472
SWN
DN
320k
47 μ H
V NEG
70
65
60
NEG CHANNEL
FBN
10pF
–8V
50mA
55
SHDN
SHDN
50
SSP
GND
SSN
45
2.2 μ F
100nF
100nF
2.2 μ F
40
0
10
20
30
40
50
LOAD CURRENT (mA)
3472 TA01a
3472 TA01b
3472f
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3473 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower 1A Boost Converter with Schottky and Output Disconnect |
| LT3473A | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower 1A Boost Converter with Schottky and Output Disconnect |
| LT3473AEDE | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower 1A Boost Converter with Schottky and Output Disconnect |
| LT3473AEDE#PBF | 功能描述:IC REG BOOST ADJ 1A 12DFN 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 |
| LT3473AEDE#TRPBF | 功能描述:IC REG BOOST ADJ 1A 12DFN 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:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 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-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
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