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參數(shù)資料
| 型號： | AT1305A-GRE |
| 廠商： | Aimtron Technology Corp. |
| 英文描述： | PFM Step-Up DC/DC Converter with LDO |
| 中文描述： | PFM步升直流/直流轉(zhuǎn)換器穩(wěn)壓器 |
| 文件頁數(shù)： | 10/13頁 |
| 文件大?。?/td> | 464K |
| 代理商： | AT1305A-GRE |
AT1305
Preliminary Product Information
PFM Step-Up DC/DC Converter with LDO
Function Description
Boost Converter
The AT1305 integrates a step-up, switch-mode DC/DC converter with a linear
regulator to provide step up/down voltage conversion. A pulse frequency modulation
(PFM) with a constant on time 4.5us and minimum off-time 1.4
μ
s controls the
N-channel MOSFET. The linear regulator contains a P-channel MOSFET. In 1-cell or
2-cell battery input (When VBAT <VOUT), only the step-up regulator is active, and
the linear regulator behaves as a pass gate. The output voltage can be adjusted with
two external resistors. The formula show as follow equation.
7F, No.9,PARK AVENUE. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879 WWW:
http://www.aimtron.com.tw
2/8/2006 REV:1.1 Email:
service@aimtron.com.tw
10
The maximum efficiency could be 89% over 50mA load range. The AT1305
guarantee starts up as low as 1.0V input.
LDO mode
The low-dropout linear regulator consists of a reference, an error amplifier and a
P-channel MOSFET. In USB mode, when VIN>4V, the linear regulator is active
automatically whether the EN and /ENPB is enabled or not. The output voltage is
default 3.3V, 3.0V and 1.8V version. Its driving capability is nearly 250mA.
)
2
1
1
2
=
2
1
1
R
R
R
R
V
VDD
FB
+
×
+
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AT1305B | PFM Step-Up DC/DC Converter with LDO |
| AT1305B-GRE | PFM Step-Up DC/DC Converter with LDO |
| AT1305-GRE | PFM Step-Up DC/DC Converter with LDO |
| AT1309 | Micro-Power Step up DC-DC Converter |
| AT1309X | Micro-Power Step up DC-DC Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT1305B | 制造商:AIMTRON 制造商全稱:AIMTRON 功能描述:PFM Step-Up DC/DC Converter with LDO |
| AT1305B-GRE | 制造商:AIMTRON 制造商全稱:AIMTRON 功能描述:PFM Step-Up DC/DC Converter with LDO |
| AT1305-GRE | 制造商:AIMTRON 制造商全稱:AIMTRON 功能描述:PFM Step-Up DC/DC Converter with LDO |
| AT1308 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Preliminary Product Information Micro-Power Step up DC-DC Converter |
| AT1309 | 制造商:AIMTRON 制造商全稱:AIMTRON 功能描述:Micro-Power Step up DC-DC Converter |
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