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參數(shù)資料
| 型號： | LT3587EUD#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PQCC20 |
| 封裝： | 3 X 3 MM, LEAD FREE, PLASTIC, QFN-20 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大小： | 395K |
| 代理商： | LT3587EUD#TRPBF |
LT3587
1
3587fc
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
High Voltage Monolithic
Inverter and Dual Boost
The LT3587 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
with small external components makes the LT3587 ideal
for space constrained applications.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Li-Ion Powered Supply for CCD Imager and Six White Backlight LEDs
n Ideal for CCD, LCD, LED Backlight and OLED
Applications
n Easy Generation of 15V (50mA), –8V (100mA) and
20V (20mA) from a Li-Ion Cell
n VVIN Range: 2.5V to 6V
n Wide Output Ranges: Up to 32V for the Boosts and
Up to –32V for the Inverter
n Output Disconnect for the Boost Channels
n Boost3 Allows Voltage Programming and/or Current
Programming for a ‘One Wire Current Source’
n Overload Fault Protection with Fault I/O Pin Indicator
n Combined Soft-Start and Enable Pins
n Small 20-Pin 3mm
× 3mm QFN Package
n Digital Still and Video Cameras
n Scanner and Display Systems
n PDA, Cellular Phones and Handheld Computers
n LED Backlight and OLED Display Drivers
n CCD Imager Bias
n General High Voltage Supply Bias
Efciency Curve
15μH
10μH
3587 TA01a
VOUT3
CAP3
VFB3
IFB3
SW2
FB2
GND
CAP1
FB1
VOUT1
LT3587
FLT
EN/SS1
EN/SS3
SW3
SW1
VIN
10μF
VVIN
2.5V TO 6V
2.2μF
15μH15μH
CCD POSITIVE
15V, 50mA
CCD NEGATIVE
–8V, 100mA
8.06k
1μF
LED DRIVER
20mA, UP TO 6 LEDS
2.2μF
1M
22μF
VVIN
2.5V TO 6V
2.7pF
6.8pF
NORMALIZED CURRENT
0
EFFICIENCY
(%)
POWER
DISSIP
A
TION
(mW)
90
85
75
65
55
80
70
60
50
800
700
500
300
100
600
400
200
0
1
3587 TA01b
1.5
0.5
CDD+ = 50mA
CDD– = 100mA
LED = 20mA
CDD+
CDD–
LED
ALL CHANNELS
ENABLED
POWER DISSIPATION
ALL CHANNELS
ENABLED
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