参数资料
| 型号： | LT3587EUD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST INV ADJ DL 20QFN |
| 标准包装： | 2,500 |
| 类型： | 升压（升压），反相 |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 可调至 ±32V |
| 输入电压： | 2.5 V ~ 6 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 20-QFN 裸露焊盘（3x3） |
LT3587
High Voltage Monolithic
Inverter and Dual Boost
FEATURES
DESCRIPTION
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Ideal for CCD, LCD, LED Backlight and OLED
Applications
Easy Generation of 15V (50mA), –8V (100mA) and
20V (20mA) from a Li-Ion Cell
V VIN Range: 2.5V to 6V
Wide Output Ranges: Up to 32V for the Boosts and
Up to –32V for the Inverter
Output Disconnect for the Boost Channels
Boost3 Allows Voltage Programming and/or Current
Programming for a ‘One Wire Current Source’
Overload Fault Protection with Fault I/O Pin Indicator
Combined Soft-Start and Enable Pins
Small 20-Pin 3mm × 3mm QFN Package
The LT ? 3587 provides a one chip solution for applications
requiring two positive and one negative high voltage sup-
plies. The LT3587 input voltage range of 2.5V to 6V makes
it ideal for various battery-powered systems.
A single resistor programs each of the three output voltage
levels and the output current of Boost3. The intelligent soft-
start allows for sequential soft-start of the Boost1 output
followed by the negative output with a single capacitor.
Internal sequencing circuitry also disables the inverter until
the Boost1 output has reached 87% of its ?nal value.
The LT3587 integrates all the power switches, soft-start,
and output-disconnect circuits into a small 3mm × 3mm
QFN package. This high level of integration combined
APPLICATIONS
with small external components makes the LT3587 ideal
for space constrained applications.
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Digital Still and Video Cameras
Scanner and Display Systems
PDA, Cellular Phones and Handheld Computers
LED Backlight and OLED Display Drivers
CCD Imager Bias
General High Voltage Supply Bias
L , LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
Li-Ion Powered Supply for CCD Imager and Six White Backlight LEDs
V VIN
2.5V TO 6V
10 μ H
15 μ H
Ef?ciency Curve
CDD + = 50mA
85 CDD = 100mA
1μF
2.2 μ F
SW3
CAP3
VIN
SW1
CAP1
10 μ F
CCD POSITIVE
90
–
LED = 20mA
CDD +
800
700
8.06k
I FB3
GND
LT3587
V OUT1
FB1
1M
2.7 p F
15V, 50mA
LED DRIVER
80
75
70
ALL CHANNELS
ENABLED
CDD –
600
500
400
EN/SS1
EN/SS3
FLT
SW2
V OUT3
V FB3
FB2
1M
6.8pF
20mA, UP TO 6 LEDS
65
60
55
LED
POWER DISSIPATION
ALL CHANNELS
ENABLED
300
200
100
V VIN
15 μ H
2.2 μ F
15 μ H
50
0
0.5
1
0
1.5
2.5V TO 6V
22 μ F
CCD NEGATIVE
–8V, 100mA
NORMALIZED CURRENT
3587 TA01b
3587 TA01a
3587fc
1
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