- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377723 > LT3464 (LINEAR TECHNOLOGY CORP) Micropower Boost Converter with Integrated Schottky and Output Disconnect in ThinSOT PDF資料下載
參數(shù)資料
| 型號： | LT3464 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Micropower Boost Converter with Integrated Schottky and Output Disconnect in ThinSOT |
| 中文描述： | SWITCHING REGULATOR, UUC8 |
| 封裝： | DIE-8 |
| 文件頁數(shù)： | 10/16頁 |
| 文件大?。?/td> | 260K |
| 代理商： | LT3464 |
LT3464
10
3464i
APPLICATIOU
W
U
U
Output Disconnect Considerations
The LT3464 is equipped with an output disconnect that
isolates the load from the input during shutdown. See the
Operation section for a functional diagram. The output
disconnect uses a pass PNP coupled with circuitry that
varies the base current such that the transistor is consis-
tently at the edge of saturation, thus yielding the best
compromise between V
CE(SAT)
and low quiescent current.
To remain stable, this circuit requires a bypass capacitor
connected between the OUT pin and the CAP pin or
between the OUT pin and ground. A ceramic capacitor with
a value of at least 0.1
μ
F is a good choice, including the Y5V
and Z5U types.
The PNP V
CE(SAT)
varies with load current as shown in
Figure 5. This voltage drop (V
DROP
) can be accounted for
when using the CAP pin as the feedback node by setting
the output voltage according to the following formula:
R
R
V
V
V
OUT
DROP
REF
2
1
1
=
+
–
In addition, the disconnect circuit has a built in current
limit of 25mA to protect the chip during short- circuit. This
Figure 5: Output Disconnect Voltage Drop (V
DROP
) vs Current
Figure 4. Feedback Connection Using the CAP Pin and the OUT Pin
CTRL
SHDN
V
IN
V
OUT
SW
OUT
GND
CAP
FB
LT3464
R2
R1
1
8
7
6
3
5
2
4
CTRL
SHDN
V
IN
V
OUT
SW
OUT
GND
CAP
FB
LT3464
R2
R1
1
8
7
6
3
5
2
4
3464 F01
feature allows the LT3464 to tolerate an indefinite short,
but care must be taken to avoid exceeding the maximum
junction temperature.
Inrush Current
When V
IN
is stepped from ground to operating voltage
while the output capacitor is discharged, an inrush current
will flow through the inductor and integrated Schottky
diode into the output capacitor. Conditions that increase
inrush current include a larger more abrupt voltage step at
V
IN
, a larger output capacitor tied to the CAP pin, and an
inductor with a low saturation current.
While the internal diode is designed to handle such events,
the inrush current should not be allowed to exceed 1 amp.
For circuits that use output capacitor values within the
recommended range and have input voltages of less than
5V, inrush current remains low, posing no hazard to the
device. In cases where there are large steps at V
IN
(more
than 5V) and/or a large capacitor is used at the CAP pin,
inrush current should be measured to ensure safe opera-
tion.
COLLECTOR CURRENT (mA)
0
V
C
300
250
200
150
100
50
0
5
10
15
20
3464 F02
30
25
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT3464ETS8 | Micropower Boost Converter with Integrated Schottky and Output Disconnect in ThinSOT |
| LT3465 | 1.2MHz/2.4MHz White LED Step-Up Converters with Built-In Schottky in ThinSOT |
| LT3465A | Single Cell 350mA LED Driver |
| LT3465ES6 | 1.2MHz/2.4MHz White LED Step-Up Converters with Built-In Schottky in ThinSOT |
| LT3465AES6 | 1.2MHz/2.4MHz White LED Step-Up Converters with Built-In Schottky in ThinSOT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3464_1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Micropower Boost Converter with Schottky and Output Disconnect in ThinSOT? |
| LT3464ETS8 | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Up 2.3V to 10V 8-Pin TSOT-23 |
| LT3464ETS8#PBF | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Up 2.3V to 10V 8-Pin TSOT-23 制造商:Linear Technology 功能描述:SP-SWREG/Monolithic, CUT TAPE 85mA Boost Converter w/intnl Schottky |
| LT3464ETS8#TR | 功能描述:IC REG BOOST ADJ 115MA TSOT23-8 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:500 系列:- 類型:切換式電容器（充電泵），反相 輸出類型:固定 輸出數(shù):1 輸出電壓:-3V 輸入電壓:2.3 V ~ 5.5 V PWM 型:Burst Mode? 頻率 - 開關(guān):900kHz 電流 - 輸出:100mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細(xì)型，TSOT-23-6 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:TSOT-23-6 其它名稱:LTC1983ES6-3#TRMTR |
| LT3464ETS8#TRM | 功能描述:IC REG BOOST ADJ 115MA TSOT23-8 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:500 系列:- 類型:切換式電容器（充電泵），反相 輸出類型:固定 輸出數(shù):1 輸出電壓:-3V 輸入電壓:2.3 V ~ 5.5 V PWM 型:Burst Mode? 頻率 - 開關(guān):900kHz 電流 - 輸出:100mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細(xì)型，TSOT-23-6 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:TSOT-23-6 其它名稱:LTC1983ES6-3#TRMTR |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。