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L o w Vo lt a g e, M i c ro p o w e r, D C- DC St ep - U p C o n v e r te r s
1 General Description
The AS1329A, AS1329B and the AS1329C are synchronous, fixed
frequency, very high-efficiency DC-DC boost converters capable of
supplying 3.3V at 160mA from a single AA-supply. Compact size and
minimum external parts requirements make these devices perfect for
modern portable devices.
High-speed switching frequency (1.2MHz) and internally
compensated PWM current 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 .
2 Key Features
Low Start-Up Voltage: 0.85V
Output Range: 2.5V to 5.0V
Single-Cell Operation
Operating with coils down to 2.2μH
Delivers 160mA @ 3.3V (from Single AA Cell)
Delivers 220mA @ 5.0V (from Two AA Cells)
Table 1. Standard Products
Model
Light Load Switching
Delivers 570mA @ 3.3V (from Two AA Cells)
AS1329A
AS1329B
AS1329C
Medium Load
Automatic Powersave Operation
Light Load Automatic Powersave Operation
Continuous Switching
95% Efficiency
High-Speed Fixed-Frequency: 1.2MHz
Internal PMOS Synchronous Rectifier
Automatic Powersave Operation (AS1329A&B)
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 directly to the output
enabling the supply of real-time-clocks. The AS1329 is available in a
6-pin TSOT-23 package.
Figure 1. Typical Application Diagram – Single Cell to 3.3V
Synchronous Boost Converter
L1
4.7μH
1
SW
Continuous Switching at Light Loads (AS1329C)
Logic Controlled Shutdown (< 1μA)
6-pin TSOT-23 Package
3 Applications
The AS1329 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 transmitters,
MP3 players, LCD bias supplies, cordless phones, GPS receivers,
and PC cards.
AA Battery
C 1
10μF
6
VIN
AS1329
5
VOUT
R 1
1.02M ?
1%
C 2
10μF
V OUT
3.3V
160mA
On
Off
4
SHDNN
3
FB
www.ams.com/DC-DC_Step-Up/AS1329
2
GND
Revision 1.12
R 2
604k ?
1%
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相关代理商/技术参数
AS1329BBTTT 制造商:AMS 功能描述:IC STEP-UP DC/DC CONVERTER 6-SOT-23 制造商:AMS 功能描述:IC, STEP-UP DC/DC CONVERTER, 6-SOT-23; Primary Input Voltage:1.2V; No. of Outputs:1; Output Voltage:5V; Output Current:220mA; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:85C; Output Current Max:315mA ;RoHS Compliant: Yes
AS1329B-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: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
AS1329B-EB 制造商:ams 功能描述:AS1329B Evaluation Board
AS1329B-TT_EK_ST 功能描述:AS1329B - 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 或 5V 电流 - 输出:570mA 电压 - 输入:0.85 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:AS1329B 标准包装:1
AS1329C 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:Low Voltage, Micropower, DC-DC Step-Up Converters
AS1329C EB 功能描述:BOARD EVAL AS1329C RoHS:否 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
AS1329CBTTT 制造商:AMS 功能描述:IC STEP-UP DC/DC CONVERTER 6-SOT-23
AS1329C-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:1,000 系列:- 类型:降压（降压） 输出类型:可调式 输出数:1 输出电压:0.6 V ~ 4.5 V 输入电压:3 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:3MHz 电流 - 输出:1.5A 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 供应商设备封装:6-LLP-EP（3x3） 产品目录页面:1300 (CN2011-ZH PDF) 其它名称:LM2831ZSDLM2831ZSDTR