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参数资料
型号： AS1322A-BTTT
厂商： AUSTRIAMICROSYSTEMS AG
元件分类： DC/DC变换器
英文描述： Adj., 315mA, 1.2 MHz, Boost; Package Type: TSOT23-6; Miscellaneous: Operation; Miscellaneous: with Automatic Powersave
中文描述： 低电压，微功耗，型DC - DC升压转换器
封装： TSOT23-6
文件页数： 12/18页
文件大小： 900K
代理商： AS1322A-BTTT
wwwaustriamcrosystems.com/DC-DC_Step-Up/AS1322
Revision 1.09
12 - 18
AS1322
Datasheet - Application Information
9.2 External Component Selection
9.2.1 Inductor Selection
The fast switching frequency (1.2MHz) of the AS1322 allows for the use of small surface mount or chip inductor for the external inductor
(see
Figure 15 on page 7)
.
The required mnimumvalues for the external inductor are:
!
3.3μH for applications
≤
3.6V
!
4.7μH for applications > 3.6V
Larger inductor values allow greater output current capability by reducing the inductor ripple current. Increasing the inductance above 10μH will
increase size while providing negligible improvement in output current capability.
The approximate output current capability of the AS1322 versus inductor value is given in:
Where:
η
is the estimated efficiency;
I
P
is the peak current limt value (0.6A);
V
IN
is the input voltage;
D is the steady-state duty ratio = (V
OUT
- V
IN
)/V
OUT
;
f is the switching frequency (1.2MHz typ);
L is the inductor value.
The inductor current ripple is typically set for 20 to 40% of the maximuminductor current (I
P
). High-frequency ferrite core inductor materials
reduce frequency dependent power losses compared to less expensive powdered iron types, which result in improved converter efficiency.
The inductor should have low ESR to reduce the I
2
R power losses, and must be able to handle the peak inductor current without saturating.
Molded chokes and some chip inductors normally do not have enough core to support the peak inductor currents of the AS1322 (850mA typ). To
mnimze radiated noise, use a toroid, pot core, or shielded bobbin inductor.
Table 5. Recommended Inductors
Part Number
MOS6020-103ML
MOS6020-472ML
MOS6020-332ML
CDRH4D18-100
CDRH4D18-6R8
CR43-6R8
CDRH4D18-4R7
L
DCR
93m
Ω
50m
Ω
46m
Ω
200m
Ω
200m
Ω
131.2m
Ω
162m
Ω
Current Rating
1A
1.5A
1.8A
0.61A
0.76A
0.95A
0.84A
Dimensions (L/W/T)
6.8x6.0x2.4mm
6.8x6.0x2.4mm
6.8x6.0x2.4mm
6.9x5.0x2.0mm
6.9x5.0x2.0mm
4.8x4.3x3.5mm
6.9x5.0x2.0mm
Manufacturer
10μH
4.7μH
3.3μH
10μH
6.8μH
6.8μH
4.7μH
Sumda
wwwsumda.com
(EQ 2)
I
OUT MAX
)
η
I
P
IN
D
f L 2
V
–
1
D
–
(
)
=
相关PDF资料
PDF描述
AS1322B-BTTT Adj., 315mA, 1.2 MHz, Boost; Package Type: TSOT23-6; Miscellaneous: with Continuous Switching
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
相关代理商/技术参数
参数描述
AS1322A-TT_EK_ST 功能描述:AS1322 - DC/DC, Step Up 1, Non-Isolated Outputs Evaluation Board 制造商:ams 系列:- 零件状态:有效 主要用途:DC/DC，步升 输出和类型:1，非隔离 功率 - 输出:- 电压 - 输出:2.5 V ~ 5 V 电流 - 输出:570mA 电压 - 输入:1 V ~ 5 V 稳压器拓扑:升压 频率 - 开关:1.2MHz 板类型:完全填充 所含物品:板 使用的 IC/零件:AS1322 标准包装:1
AS1322B 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:Low Voltage, Micropower, DC-DC Step-Up Converters
AS1322BBTTT 制造商:AMS 功能描述:IC STEP-UP DC/DC CONVERTER 6-SOT-23
AS1322B-BTTT 功能描述:IC REG BOOST SYNC ADJ TSOT23-6 RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 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:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2
AS1322-EB 制造商:ams 功能描述:AS1322 Evaluation Board
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