- 您现在的位置：买卖IC网 > PDF目录80307 > LTC3109IUF#PBF (LINEAR TECHNOLOGY CORP) 0.026 A SWITCHING REGULATOR, PQCC20 PDF资料下载
参数资料
| 型号： | LTC3109IUF#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.026 A SWITCHING REGULATOR, PQCC20 |
| 封装： | 4 X 4 MM, LEAD FREE, PLASTIC, MO-220WGGD-1, QFN-20 |
| 文件页数： | 10/24页 |
| 文件大小： | 329K |
| 代理商： | LTC3109IUF#PBF |
LTC3109
3109f
applicaTions inForMaTion
The time for VOUT to charge and reach regulation can be
calculated by the formula below, which assumes VOUT is
programmed to 3.3V and COUT is 330F:
t
V
F
I
t
VOUT
CHG
VOUT
LDO
=
+
3 3 330
.
–
With 150A of charge current available and 5A of load on
both VOUT and VLDO, the time for VOUT to reach regula-
tion after the initial application of power would be 7.81
seconds.
DESIGN EXAMPLE 2
In most pulsed-load applications, the duration, magnitude
and frequency of the load current pulses are known and
fixed. In these cases, the average charge current required
from the LTC3109 to support the average load must be
calculated, which can be easily done by the following:
I
t
T
CHG
Q
PULSE
≥ +
where IQ is the sleep current supplied by VOUT and VLDO
to the external circuitry in-between load pulses, including
output capacitor leakage, IPULSE is the total load current
during the pulse, tPULSE is the duration of the load pulse
and T is the pulse period (essentially the time between
load pulses).
In this example, IQ is 5A, IPULSE is 100mA, tPULSE is 5ms
and T is one hour. The average charge current required
from the LTC3109 would be:
I
A
mA
A
CHG ≥
+
=
5
100
0 005
3600
5 14
.
sec
.
Therefore, if the LTC3109 has an input voltage that allows
it to supply a charge current greater than just 5.14A, the
application can support 100mA pulses lasting 5ms every
hour. It can be seen that the sleep current of 5A is the
dominant factor in this example, because the transmit
duty cycle is so small (0.00014%). Note that for a VOUT
of 3.3V, the average power required by this application is
only 17W (not including converter losses).
Keep in mind that the charge current available from the
LTC3109 has no effect on the sizing of the VOUT capacitor,
and the VOUT capacitor has no effect on the maximum
allowed pulse rate.
相关PDF资料 |
PDF描述 |
|---|---|
| LDO10C-015W05-HJ | 1-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| LM4040ETB-330GT3 | 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 3.3 V, PDSO3 |
| LWN2880-6ERD2M2FK2G | 2-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| LTC4000IGN#TRPBF | 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO28 |
| LTC4155EUFD#TRPBF | POWER SUPPLY SUPPORT CKT, PQCC28 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3109IUF-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Auto-Polarity, Ultralow Voltage Step-Up Converter and Power Manager |
| LTC3112 | 制造商:LINEAR 制造商全称:LINEAR 功能描述:40V, 2A Synchronous Buck-Boost DC/DC Converter |
| LTC3112EDHD#PBF | 功能描述:IC REG BUCK BST SYNC ADJ 16-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LTC3112EDHD#TRPBF | 功能描述:IC REG BUCK BST SYNC ADJ 16-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LTC3112EDHDPBF | 制造商:Linear Technology 功能描述:15V 2.5A Synch Buck-Boost DC/DC DFN16EP |
发布紧急采购，3分钟左右您将得到回复。