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参数资料
| 型号： | LT3487EDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST INV ADJ 10DFN |
| 标准包装： | 121 |
| 类型： | 升压（升压），反相 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.23 V ~ 28 V |
| 输入电压： | 2.3 V ~ 16 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 2MHz |
| 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： | 管件 |
| 供应商设备封装： | 10-DFN（3x3） |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
LT3487
Boost and Inverting
Switching Regulator
for CCD Bias
FEATURES
DESCRIPTIO
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Generates 15V at 45mA, –8V at 90mA from a
Li-Ion Cell
Output Disconnect
Sequencing: Positive Output Reaches Regulation
Before Negative Channel Begins Switching
Internal Schottky Diodes
2MHz Constant Switching Frequency
Requires Only One Resistor per Channel to Set
Output Voltages
V IN Range: 2.3V to 16V
Output Voltage Up to 28V
Short-Circuit Robust
Capacitor Programmable Soft-Start
Separate V BAT Pin Allows Separate Sources for
Power and Control Circuitry
Available in 10-Lead (3mm × 3mm) DFN Package
The LT ? 3487 dual channel switching regulator generates
positive and negative outputs for biasing CCD imagers.
The device delivers up to –8V at 90mA and 15V at 45mA
from a lithium-ion cell, providing bias for many popular
CCD imagers. The boost regulator incorporates output
disconnect technology to eliminate the DC current path
from V IN to the output load that is present in standard
boost con?gurations. The 2MHz switching frequency
allows CCD solutions using tiny, low pro?le capacitors
and inductors and generates low noise outputs that are
easy to ?lter. Schottky diodes are internal and the output
voltages are set with one resistor per channel, reducing
the external component count.
Intelligent soft-start allows sequential soft-start of the two
channels with a single capacitor. The soft-start is sequenced
such that the output ramp of the negative channel begins
APPLICATIO S
after the ramp of the positive channel. Internal sequencing
circuitry also disables the negative channel until the positive
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CCD Bias
TFT LCD Bias
OLED Bias
±Rail Generation for Op Amps
channel has reached 87% of its ?nal value, ensuring that
the sum of the two outputs is always positive.
The LT3487 is available in a 10-pin 3mm × 3mm DFN
package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
Conversion Ef?ciency
15 μ H
10 μ H
80
POS CHANNEL AT CAP
V IN
3V TO 12V
1 μ F
2.2 μ F
SWN
V IN
V BAT
LT3487
SWP
CAP
549k
100nF
75
70
65
POS CHANNEL
AT V POS
DN
FBP
60
NEG CHANNEL
15 μ H
47pF
4.7 μ F
55
V NEG
–8V
90mA
22 μ F
324k
RUN/SS
100nF
FBN
RUN/SS
GND
V POS
V POS
15V
45mA
50
45
40
0
20
40
60
V IN = 3.6V
80 100
3487 TA01a
LOAD CURRENT (mA)
3487 TA01b
3487f
1
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| LT3489 | 制造商:LINER 制造商全称:Linear Technology 功能描述:2MHz Boost DC/DC Converter with 2.5A Switch and Soft-Start |
| LT3489EMS8E | 制造商:LINER 制造商全称:Linear Technology 功能描述:2MHz Boost DC/DC Converter with 2.5A Switch and Soft-Start |
| LT3489EMS8E#PBF | 功能描述:IC REG BOOST ADJ 2.5A 8MSOP 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 |
| LT3489EMS8E#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BOOST 2MHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BOOST, 2MHZ, MSOP-8 |
| LT3489EMS8E#TR | 制造商:Linear Technology 功能描述:SP-SWREG/Monolithic, 2.5A, 2MHz Step-Up Regulator in MS8E |
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