- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377682 > LT1110CN8-12 (LINEAR TECHNOLOGY CORP) Micropower DC-DC Converter Adjustable and Fixed 5V, 12V PDF資料下載
參數(shù)資料
| 型號： | LT1110CN8-12 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Micropower DC-DC Converter Adjustable and Fixed 5V, 12V |
| 中文描述： | 1.5 A SWITCHING REGULATOR, 70 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | MINI, PLASTIC, DIP-8 |
| 文件頁數(shù)： | 11/16頁 |
| 文件大?。?/td> | 310K |
| 代理商： | LT1110CN8-12 |
LT1110
11
Converter” section with the following conservative ex-
pression for V
SW
:
V
V
V
V
SW
R
SAT
=
+
≈
1
0 9
.
24
(
.
)
R2 provides a current path to turn off Q1. R3 provides base
drive to Q1. R4 and R5 set output voltage.
Inverting Configurations
The LT1110 can be configured as a positive-to-negative
converter (Figure 7), or a negative-to-positive converter
(Figure 8). In Figure 7, the arrangement is very similar to
a step-down, except that the high side of the feedback is
referred to ground. This level shifts the output negative. As
in the step-down mode, D1 must be a Schottky diode,
and
V
OUT
should be less than 6.2V. More negative out-
put voltages can be accommodated as in the prior section.
LT1110 TA03
–V
OUT
+
C2
+
C1
D1
1N5818
+V
IN
R1
R2
L1
GND
SW2
SW1
LIM
I
IN
V
R3
FB
LT1110
Figure 7. Positive-to-Negative Converter
In Figure 8, the input is negative while the output is
positive. In this configuration, the magnitude of the input
voltage can be higher or lower than the output voltage. A
level shift, provided by the PNP transistor, supplies proper
polarity feedback information to the regulator.
L1
dissipation inside the LT1110. Output voltage is deter-
mined by
V
R
R
mV
OUT
=
+
(
)
1
2
1
220
23
(
.
)
R3 programs switch current limit. This is especially im-
portant in applications where the input varies over a wide
range. Without R3, the switch stays on for a fixed time
each cycle. Under certain conditions the current in L1 can
build up to excessive levels, exceeding the switch rating
and/or saturating the inductor. The 220
resistor pro-
grams the switch to turn off when the current reaches
approximately 800mA. When using the LT1110 in step-
down mode, output voltage should be limited to 6.2V or
less. Higher output voltages can be accommodated by
inserting a 1N5818 diode in series with the SW2 pin
(anode connected to SW2).
Higher Current Step-Down Operation
Output current can be increased by using a discrete PNP
pass transistor as shown in Figure 6. R1 serves as a
current limit sense. When the voltage drop across R1
equals a V
BE
, the switch turns off. For temperature com-
pensation a Schottky diode can be inserted in series with
the I
LIM
pin. This also lowers the maximum drop across R1
to V
BE
– V
D
, increasing efficiency. As shown, switch
current is limited to 2A. Inductor value can be calculated
based on formulas in the “Inductor Selection Step-Down
U
S
A
O
PPLICATI
IU
U
Figure 6. Q1 Permits Higher-Current Switching.
LT1110 Functions as Controller.
LT1110 TA16
D1
1N5821
+
+
V
OUT
V
IN
25V
MAX
L1
R1
0.3
R2
220
Q1
MJE210 OR
ZETEX ZTX789A
R3
330
R4
R5
C1
V
OUT
= 220mV
(
1 +
)
LT1110
GND
SW2
SW1
V
IN
I
L
FB
C2
Figure 8. Negative-to-Positive Converter
LT1110 TA04
GND
SW2
FB
SW1
LIM
I
IN
V
D1
AO
+V
OUT
R2
V
OUT
= R1
R1
2N3906
–V
IN
+
C1
LT1110
+
C2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1110CN8 | Micropower DC-DC Converter Adjustable and Fixed 5V, 12V |
| LT1110 | Micropower DC-DC Converter Adjustable and Fixed 5V, 12V |
| LT1110-12 | Micropower DC-DC Converter Adjustable and Fixed 5V, 12V |
| LT1110-5 | Micropower DC-DC Converter Adjustable and Fixed 5V, 12V |
| LT1110CN8-5 | Micropower DC-DC Converter Adjustable and Fixed 5V, 12V |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1110CN8-12#PBF | 功能描述:IC REG BUCK BOOST 12V 0.4A 8DIP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓(xùn)模塊:MIC23xxx HyperLight Load™ Regulators 標(biāo)準(zhǔn)包裝:5,000 系列:HyperLight Load® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.8V 輸入電壓:2.7 V ~ 5.5 V PWM 型:混合物 頻率 - 開關(guān):4MHz 電流 - 輸出:2A 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-VFDFN 裸露焊盤，8-MLF? 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-MLF?（2x2） 產(chǎn)品目錄頁面:1094 (CN2011-ZH PDF) 其它名稱:576-3303-2 |
| LT1110CN8-5 | 功能描述:IC REG BUCK BOOST 5V 0.4A 8DIP 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:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LT1110CN8-5#PBF | 功能描述:IC REG BUCK BOOST 5V 0.4A 8DIP RoHS:是 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:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LT1110CS8 | 功能描述:IC REG BUCK BOOST ADJ 0.4A 8SOIC 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:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:10-MSOP 裸露焊盤 |
| LT1110CS8#PBF | 功能描述:IC REG BUCK BOOST ADJ 0.4A 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓(xùn)模塊:MIC23xxx HyperLight Load™ Regulators 標(biāo)準(zhǔn)包裝:5,000 系列:HyperLight Load® 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.8V 輸入電壓:2.7 V ~ 5.5 V PWM 型:混合物 頻率 - 開關(guān):4MHz 電流 - 輸出:2A 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-VFDFN 裸露焊盤，8-MLF? 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-MLF?（2x2） 產(chǎn)品目錄頁面:1094 (CN2011-ZH PDF) 其它名稱:576-3303-2 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。