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參數資料
| 型號： | LT1308BCF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | High Current, Micropower Single Cell, 600kHz DC/DC Converters |
| 中文描述： | 4.5 A SWITCHING REGULATOR, 750 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | 4.40 MM, PLASTIC, TSSOP-14 |
| 文件頁數： | 5/12頁 |
| 文件大?。?/td> | 185K |
| 代理商： | LT1308BCF |
5
LT1308A/LT1308B
V
C
(Pin 1):
Compensation Pin for Error Amplifier. Con-
nect a series RC from this pin to ground. Typical values
are 47k
and 100pF. Minimize trace area at V
C
.
FB (Pin 2):
Feedback Pin. Reference voltage is 1.22V.
Connect resistive divider tap here. Minimize trace area at
FB. Set V
OUT
according to: V
OUT
= 1.22V(1 + R1/R2).
SHDN (Pin 3):
Shutdown. Ground this pin to turn off
switcher. To enable, tie to 1V or more. SHDN does not
need to be at V
IN
to enable the device.
GND (Pin 4):
Ground. Connect directly to local ground
plane. Ground plane should enclose all components
associated with the LT1308. PCB copper connected to
Pin 4 also functions as a heat sink. Maximize this area to
keep chip heating to a minimum.
PI
FU
CTIO
N
S
U
U
SW (Pin 5):
Switch Pin. Connect inductor/diode here.
Minimize trace area at this pin to keep EMI down.
V
IN
(Pin 6):
Supply Pin. Must have local bypass capacitor
right at the pin, connected directly to ground.
LBI (Pin 7):
Low-Battery Detector Input. 200mV refer-
ence. Voltage on LBI must stay between –100mV and 1V.
Low-battery detector does not function with SHDN pin
grounded. If not used, float LBI pin.
LBO (Pin 8):
Low-Battery Detector Output. Open collec-
tor, can sink 50
μ
A. A 1M
pull-up is recommended. LBO
is high impedance when SHDN is grounded.
–
+
–
+
–
+
–
+
–
+
+
+
Σ
COMPARATOR
RAMP
GENERATOR
R
BIAS
V
C
1
2V
BE
g
m
Q2
×
10
R3
30k
Q1
FB
FB
2
ENABLE
*HYSTERESIS IN LT1308A ONLY
200mV
A = 3
FF
A2
A1
Q4
*
ERROR
AMPLIFIER
A4
0.03
DRIVER
SW
5
GND
1308 BD
Q3
Q
S
600kHz
OSCILLATOR
LBO
8
LBI
7
SHDN
3
SHUTDOWN
4
R6
40k
R5
40k
R1
(EXTERNAL)
R4
140k
V
IN
6
V
IN
V
IN
V
OUT
R2
(EXTERNAL)
BLOCK DIAGRA
M
W
Figure 2. LT1308A/LT1308B Block Diagram
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LT1308BCF#PBF | 功能描述:IC REG BOOST 5V 1A 14TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關:52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應商設備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| LT1308BCF#TR | 功能描述:IC REG BOOST 5V 1A 14TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關:52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應商設備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| LT1308BCF#TRPBF | 功能描述:IC REG BOOST 5V 1A 14TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:20 系列:SIMPLE SWITCHER® 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:12V 輸入電壓:4 V ~ 60 V PWM 型:電壓模式 頻率 - 開關:52kHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:通孔 封裝/外殼:16-DIP（0.300"，7.62mm） 包裝:管件 供應商設備封裝:16-DIP 其它名稱:*LM2575HVN-12LM2575HVN-12 |
| LT1308BCF-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Current, Micropower Single Cell, 600kHz DC/DC Converters |
| LT1308BCF-TR | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Current, Micropower Single Cell, 600kHz DC/DC Converters |
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