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參數(shù)資料
| 型號(hào)： | AS1322B-BTTT |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | DC/DC變換器 |
| 英文描述： | Adj., 315mA, 1.2 MHz, Boost; Package Type: TSOT23-6; Miscellaneous: with Continuous Switching |
| 中文描述： | 低電壓，微功耗，型DC - DC升壓轉(zhuǎn)換器 |
| 封裝： | TSOT23-6 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大小： | 900K |
| 代理商： | AS1322B-BTTT |
AS1322
Low Voltage, Micropower, DC-DC Step-Up Converters
wwwaustriamcrosystems.com/DC-DC_Step-Up/AS1322
Revision 1.09
1 - 18
Datasheet
1 General Description
The AS1322A and the AS1322B are synchronous, fixed frequency,
very high-efficiency DC-DC boost converters capable of supplying
3.3V at 150mA froma single AA-supply. Compact size and mnimum
external parts requirements make these devices perfect for modern
portable devices.
High-speed switching frequency (1.2MHz) and internally
compensated PWMcurrent mode design provide highly-reliable DC-
DC conversion, especially when driving white LEDs.
The converters are available as the standard products listed in
Table
1
.
The devices contain two internal MOSFET switches: one NMOS
switch and one PMOS synchronous rectifier.
Anti-ringing control circuitry reduces EMI by damping the inductor in
discontinuous mode, and the devices exhibit extremely low
quiescent current (< 1μA) in shutdown.
In shutdown mode the battery is connected to the output and V
OUT
is held at approximately V
IN
- 0.6V.
The AS1322 is available in a 6-pin TSOT-23 package.
Figure 1. Typical Application Diagram– Single Cell to 3.3V
Synchronous Boost Converter
2 Key Features
!
95% Efficiency
!
Single-Cell Operation
!
Delivers 160mA @ 3.3V (fromSingle AA Cell)
!
Delivers 220mA @ 5.0V (fromTwo AA Cells)
!
Delivers 570mA @ 3.3V (fromTwo AA Cells)
!
Low Start-Up Voltage: 0.85V
!
High-Speed Fixed-Frequency: 1.2MHz
!
Internal PMOS Synchronous Rectifier
!
Automatic Powersave Operation (AS1322A)
!
Continuous Switching at Light Loads (AS1322B)
!
Anti-Ringing Control Mnimzes EMI
!
Logic Controlled Shutdown (< 1μA)
!
Output Range: 2.5 to 5.0V
!
6-pin TSOT-23 Package
3 Applications
The AS1322 is ideal for low-power applications where ultra-small
size is critical as in medical diagnostic equipment, hand-held
instruments, pagers, digital cameras, remote wireless transmtters,
MP3 players, LCD bias supplies, cordless phones, GPS receivers,
and PC cards.
Table 1. Standard Products
Model
Light Load Switching
AS1322A
Automatic Powersave Operation
AS1322B
Continuous Switching
AA Battery
AS1322
C
2
10μF
R
2
604k
Ω
1%
R
1
1.02M
Ω
1%
On
Off
L1
4.7μH
C
1
10μF
GND
2
SW
1
V
OUT
3.3V
160mA
4
SHDNN
3
FB
6
V
IN
5
V
OUT
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AS1323-BTTT-27 | 1.6μA Iq, Single Cell, Boost; Package Type: TSOT23-5; Output Range: 2.7V |
| AS1323-BTTT-30 | 1.6μA Iq, Single Cell, Boost; Package Type: TSOT23-5; Output Range: 3.0V |
| AS1323-BTTT-33 | 1.6μA Iq, Single Cell, Boost; Package Type: TSOT23-5; Output Range: 3.3V |
| AS1324-BTTT-AD | 600mA Buck Converter; Package Type: TSOT23-5; Output Range: 0.6V to Vin |
| AS1324-BTTT-12 | 600mA Buck Converter; Package Type: TSOT23-5; Output Range: 1.2V |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AS1322-EB | 制造商:ams 功能描述:AS1322 Evaluation Board |
| AS1-322-W3-302 | 制造商:TE Connectivity 功能描述: |
| AS1323 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:1.6uA Quiescent Current, Single Cell, DC-DC Step-up Converter |
| AS1323_04 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:1.6??A Quiescent Current, Single Cell, DC-DC Step-up Converter |
| AS1323_1 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:1.6uA Quiescent Current, Single Cell, DC-DC Step-up Converter |
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