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參數(shù)資料
| 型號： | AAT1265IJS-3.3-T1 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | Low Voltage 2MHz Step-Up DC/DC Converter in SC70JW Package |
| 中文描述： | 低壓2MHz的升壓直流/直流轉(zhuǎn)換器在SC70JW的包裝 |
| 文件頁數(shù)： | 8/13頁 |
| 文件大?。?/td> | 390K |
| 代理商： | AAT1265IJS-3.3-T1 |
AAT1265
Low Voltage 2MHz Step-Up DC/DC
Converter in SC70JW Package
8
1265.2006.06.1.2
Functional Block Diagram
Voltage
Reference
Logic
DH
DL
V
REF
OUT
GND
EN
GND
LX
Comp.
VIN
VCC
Mode
Control
Low Voltage
Start-Up
Start-Up
Inrush Control
Current
Sense
Error
Amp.
2MHz
Oscillator
Functional Description
The AAT1265 synchronous step-up converter is
targeted for single- or dual-cell alkaline, NiMH, and
NiCd battery applications. It has a 1V typical start-
up voltage with operation after start-up to less than
0.8V.
The high 2MHz switching frequency of the
AAT1265 facilitates output filter component size
reduction for improved power density and reduced
overall footprint. It also provides greater bandwidth
and improved transient response over other lower
frequency step-up converters. The compensation
and feedback is integrated with only three external
components (C
IN
, C
OUT
, L).
Low R
DS(ON)
synchronous power switches provide
high efficiency for heavy load conditions. Switching
frequency modulation and low quiescent current
maintains this high efficiency for light load and
sleep mode conditions.
In addition to the improved efficiency, the synchro-
nous boost has the added performance advantage
of true load disconnect during shutdown (<1μA
shutdown current), inrush current limit, and short-
circuit protection.
PWM / PFM Control
The AAT1265 is a fixed frequency PWM peak cur-
rent mode control step-up converter. For light load
conditions (10 to 20mA and below), the converter
transitions to a variable frequency (PFM) mode to
reduce the dominant switching losses. In addition
to PFM operation, a zero current comparator
blocks reverse current in the P-channel synchro-
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1265IJS-5.0-T1 | 制造商:Skyworks Solutions Inc 功能描述:Voltage Regulators - Switching Regulators Lo Volt 2MHz Step-Up DC/DC Converter |
| AAT1270 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1A Step-Up Current Regulator for Flash LEDs |
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| AAT1271 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1.5A Step-Up Current Regulator for Flash LEDs |
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