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| 型号： | AS1326A-BTDT |
| 厂商： | AUSTRIAMICROSYSTEMS AG |
| 元件分类： | DC/DC变换器 |
| 英文描述： | Adj. 650mA, 1MHz, Boost |
| 中文描述： | 高电流0.8A的DC - DC升压转换器 |
| 文件页数： | 13/18页 |
| 文件大小： | 1108K |
| 代理商： | AS1326A-BTDT |
www.austriamicrosystems.com
Revision 1.05
13 - 18
AS1326
Datasheet - Application Information
Inductor Selection
The AS1326A/AS1326B high switching-frequency allows the use of a small 3.3μH surface-mount inductor. The induc-
tor should generally have a saturation current rating exceeding the N-channel switch current limit; however, it is
acceptable to bias the inductor current into saturation by as much as 20% if a slight reduction in efficiency is accept-
able.
Lower current-rated inductors may be used if ISET is used to reduce the peak inductor current
(see Setting the Switch
Current Limit on page 12)
. For high efficiency, select an inductor with a high-frequency ferrite core material to reduce
core losses. To minimize radiated noise, use a toroid or shielded inductor. Connect the inductor from the battery to the
pin LX as close to the device as possible.
Figure 23. Efficiency vs. I
OUT
; V
IN
= 2V, V
OUT
= 3.3V
96
Figure 24. Efficiency vs. I
OUT
; V
IN
= 3V, V
OUT
= 5V
96
External Schottky Diode
For output voltages greater than 4V, an external Schottky diode must be connected between pin LX and POUT, in par-
allel with the integrated synchronous rectifier
(see Figure 25)
. The diode should be rated for 0.5A. An external diode is
also recommended for applications that must start with input voltages at or below 1.8V. The Schottky diode carries cur-
rent during startup and after the synchronous rectifier turns off; thus, its current rating only needs to be 500mA.
Note:
Connect the diode as close to the IC as possible.
For circuits that do not require startup with inputs below 1.8V and have an output of 4V or less, the external
diode is not needed.
Caution:
Do not use ordinary rectifier diodes as their slow switching speeds and long reverse-recovery times render
them unacceptable.
Table 7. Recommended Inductors
Part Number
MOS6020-332
LPS4018-332
DO1608C-272
L
DCR
46m
Ω
80m
Ω
80m
Ω
Current Rating Dimensions (L/W/T)
1.8A
2.0A
2.1A
6.6x4.45x2.92mm
Manufacturer
Coilcraft
3.3μH3.3μH
2.7μH
6.8x6.0x2.4mm
4x4x1.8mm
CDRH5D18NP-4R1N
4.1μH
57m
Ω
1.95A
6x6x2mm
Sumida
www.sumida.com
76
78
80
82
84
86
88
90
92
94
0.1
1
Output Current (mA)
10
100
1000
E
.
MOS6020-332
DO1608C-272
CDRH5D18NP-4R1N
LPS4018-332
70
72
74
76
78
80
82
84
86
88
90
92
94
0.1
1
Output Current (mA)
10
100
1000
E
.
MOS6020-332
DO1608C-272
CDRH5D18NP-4R1N
LPS4018-332
相关PDF资料 |
PDF描述 |
|---|---|
| AS1326B-BTDT | Adj. 650mA, 1MHz, Boost; Package Type: TDFN(3x3)-10; Miscellaneous: Logic-High On |
| AS1329A-BTTT | Adj. 315mA, 1.2MHz Boost feed.; Package Type: TSOT23-6; Miscellaneous: (medium loads); Miscellaneous: Powersave Operation |
| AS1329B-BTTT | Adj. 315mA, 1.2MHz Boost feed.; Package Type: TSOT23-6; Miscellaneous: (light loads); Miscellaneous: Powersave Operation |
| AS1329C-BTTT | Adj. 315mA, 1.2MHz Boost feed.; Package Type: TSOT23-6; Miscellaneous: Continuous Switching |
| AS1331-BTDT-AD | 300mA Buck-Boost Converter; Package Type: TDFN(3x3)-10; Output Range: 2.5 to 3.3V |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AS1326A-BTDT-1K | 功能描述:IC REG BST SYNC 3.3V/ADJ 10-TDFN 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:50 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:5 V ~ 25 V 输入电压:2.3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:600kHz，1.2MHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 包装:管件 供应商设备封装:8-MSOP |
| AS1326A-BTDU | 制造商:ams 功能描述:DC-DC Step Up, Fixed, Sync, 0.7 to 5.0V input, 3.3, 2.5 to 5.0V (650mA) Output, 96% Efficiency, 1200 kHz fmax, TDFN-10, Synchronizes to External Clock, Tray |
| AS1326A-TD_EK_ST | 功能描述:AS1326 - 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:3.3V 电流 - 输出:800mA 电压 - 输入:0.7 V ~ 5 V 稳压器拓扑:升压 频率 - 开关:1MHz 板类型:完全填充 所含物品:板 使用的 IC/零件:AS1326 标准包装:1 |
| AS1326B | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:High Current, 0.8A DC-DC Step-Up Converters |
| AS1326B-BTDR | 功能描述:IC REG BST SYNC 3.3V/ADJ 10TDFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:MIC23xxx HyperLight Load™ Regulators 标准包装:5,000 系列:HyperLight Load® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.8V 输入电压:2.7 V ~ 5.5 V PWM 型:混合物 频率 - 开关:4MHz 电流 - 输出:2A 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘，8-MLF? 包装:带卷 (TR) 供应商设备封装:8-MLF?（2x2） 产品目录页面:1094 (CN2011-ZH PDF) 其它名称:576-3303-2 |
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