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| 型号： | AS1310-BTDT-25 |
| 厂商： | ams |
| 文件页数： | 12/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST 2.5V 60MA 8TDFN |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 2.5V |
| 输入电压： | 0.7 V ~ 3.6 V |
| 电流 - 输出： | 60mA |
| 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-UFDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-TDFN（2x2） |
| 其它名称： | AS1310-BTDT-25DKR |
AS1310
Datasheet - D e t a i l e d D e s c r i p t i o n
8.1.4
Input Capacitor Selection
The input capacitor supports the triangular current during the on-time of the power switch, and maintains a broadly constant input voltage during
this time. The capacitance value is obtained from choosing a ripple voltage during the on-time of the power switch. Additionally, ripple voltage is
generated by the equivalent series resistance (ESR) of the capacitor. For worst case, use maximum peak current values from the datasheet.
C IN = -------------------------
I PEAK T ON
V RIPPLE
Using T ON = 1μs, and I PEAK = 480mA, and V RIPPLE = 50mV, EQ 15 yields:
C IN = 9.6μF
Nearest preferred would be 10μF.
V PK _ RIPPLE _ ESR = I PK R ESR
(EQ 15)
(EQ 16)
Typically, the ripple due to ESR is not dominant. ESR for the recommended capacitors (Murata GMR), ESR = 5m Ω to 10m Ω . For the AS1310,
maximum peak current is 480mA. Ripple due to ESR is 2.4mV to 4.8mV.
Ripple at the input propagates through the common supply connections, and if too high in value can cause problems elsewhere in the system.
The input capacitance is an important component to get right.
8.1.5
Output Capacitor Selection
The output capacitor supports the triangular current during the off-time of the power switch (inductor discharge period), and also the load current
during the wait time (Region D in Figure 13 ) and on-time (Region A in Figure 13 ) of the power switch.
C OUT =
I LOAD ( T ON + T WAIT )
( 1 ? 0 . 99 ) V OUT _ NOM
(EQ 17)
Note: There is also a ripple component due to the equivalent series resistance (ESR) of the capacitor.
8.2 Summary
User Application Defines: V IN min, V IN max, V OUT min, V OUT max, I LOAD min, I LOAD max
Inductor Selection:
Select Max on-time = 0.5μs to 3μs for AS1310. Use (EQ 3) to calculate inductor value.
Use (EQ 5) to determine off-time.
Use (EQ 6) to check that power delivery matches load requirements assume 70% conversion efficiency.
Use (EQ 13) to find overall timing period value of T at min V IN and max V OUT for maximum load conditions.
Input Capacitor Selection: Choose a ripple value and use (EQ 14) to find the value.
Output Capacitor Selection: Determine T WAIT via (EQ 6) or (EQ 13) , and use (EQ 16) to find the value.
www.austriamicrosystems.com/DC-DC_Step-Up/AS1310
Revision 1.8
11 - 19
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| AS1310-BTDT-27 | 功能描述:IC REG BOOST 2.7V 60MA 8TDFN 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 |
| AS1310-BTDT-30 | 功能描述:IC REG BOOST 3V 60MA 8TDFN 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 |
| AS1310-BTDT-33 | 制造商:ams 功能描述:Low Q Current DC/DC Step-Up Converter IC |
| AS1310-BTDT-331 | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:Ultra Low Quiescent Current, Hysteretic DC-DC Step-Up Converter |
| AS1310-BTDT-xx2 | 制造商:AMSCO 制造商全称:austriamicrosystems AG 功能描述:Ultra Low Quiescent Current, Hysteretic DC-DC Step-Up Converter |
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