- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄32308 > LTC3109EGN#PBF (LINEAR TECHNOLOGY CORP) 0.026 A SWITCHING REGULATOR, PDSO20 PDF資料下載
參數(shù)資料
| 型號(hào)： | LTC3109EGN#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.026 A SWITCHING REGULATOR, PDSO20 |
| 封裝： | 0.150 INCH, LEAD FREE, PLASTIC, SSOP-20 |
| 文件頁數(shù)： | 10/24頁 |
| 文件大?。?/td> | 329K |
| 代理商： | LTC3109EGN#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.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC3109EUF#PBF | 0.026 A SWITCHING REGULATOR, PQCC20 |
| LTC3109IGN#TRPBF | 0.026 A SWITCHING REGULATOR, PDSO20 |
| LTC3873ITS8-5#TR | SWITCHING CONTROLLER, PDSO8 |
| LTC3873IDDB-5#PBF | SWITCHING CONTROLLER, PDSO8 |
| LTC3873ITS8-5 | SWITCHING CONTROLLER, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3109EGN-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Auto-Polarity, Ultralow Voltage Step-Up Converter and Power Manager |
| LTC3109EUF#PBF | 功能描述:IC BOOST CONVERTER PMU 20QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動(dòng)設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR |
| LTC3109EUF#TRPBF | 功能描述:IC BOOST CONVERTER PMU 20QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動(dòng)設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR |
| LTC3109EUF-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Auto-Polarity, Ultralow Voltage Step-Up Converter and Power Manager |
| LTC3109EUF-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Auto-Polarity, Ultralow Voltage Step-Up Converter and Power Manager |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。