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| 型号： | LTC3459ES6#TR |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC ADJ SOT23-6 |
| 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： | 2.5 V ~ 10 V |
| 输入电压： | 1.5 V ~ 5.5 V |
| PWM 型： | Burst Mode? |
| 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： | SOT-23-6 细型，TSOT-23-6 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | TSOT-23-6 |
LTC3459
10V Micropower
Synchronous Boost Converter
FEATURES
DESCRIPTION
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Small Solution Size
>85% Ef?ciency over Wide Load Range
Internal Synchronous Recti?er
V IN Range: 1.5V to 5.5V
5V at 30mA from 3.3V Input
3.3V at 20mA from 2 AA Cell Input
Programmable Output Voltages Up to 10V
Burst Mode ? Operation
Inrush Current Limiting
Output Disconnect in Shutdown
Ultralow Quiescent (10μA) and Shutdown (<1μA)
Currents
Low Pro?le 2mm × 2mm DFN, 2mm × 3mm DFN or
SOT-23 Package
The LTC ? 3459 is a low current, high ef?ciency synchronous
boost converter intended for low power, size constrained
portable applications. The LTC3459 can be powered from
a single lithium ion battery, a 2- to 3-cell stack of alkaline
or nickel batteries, or any low impedance voltage source
between 1.5V and 5.5V. The output is programmable via
an external divider between 2.5V and 10V. Although the
part is primarily intended for boost applications, V OUT will
maintain regulation below V IN (at reduced ef?ciency).
The LTC3459 offers Burst Mode operation with a ?xed
peak current, providing high conversion ef?ciency over
a wide range of load currents. During start-up, inductor
current is controlled preventing the inrush surge current
found in many boost converters. In shutdown the output
is disconnected from the input and quiescent current is
APPLICATIONS
reduced to <1μA.
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General Purpose Micropower Boost
Digital Cameras
PDAs
LCD Bias
Small OLED Displays
Supercap Charging
The LTC3459 is offered in low pro?le 6-pin 2mm × 2mm
DFN, 2mm × 3mm DFN or SOT-23 (ThinSOT TM ) packages,
allowing a tiny footprint for the total solution.
, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology
Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
TYPICAL APPLICATION
22μH
5V to 8V Converter
100
90
V IN = 5V
V OUT = 8V
Ef?ciency
SW
V OUT
5V
V IN V OUT
LTC3459
2M
47pF
8V
30mA
80
1μF
OFF ON
SHDN
FB
4.7μF
70
GND
365k
3459 TA01a
60
50
0.01
0.1
1
10
100
I LOAD (mA)
3459 TA01b
3459fc
1
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