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參數(shù)資料
| 型號： | LT3502IDC#TRM |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.1 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 2 X 2 MM, PLASTIC, DFN-10 |
| 文件頁數(shù)： | 17/20頁 |
| 文件大小： | 457K |
| 代理商： | LT3502IDC#TRM |
LT3502/LT3502A
6
3502f
BLOCK DIAGRAM
PIN FUNCTIONS
VIN (Pin 1): The VIN pin supplies current to the LT3502/
LT3502A’s internal regulator and to the internal power
switch. This pin must be locally bypassed.
BD (Pin 2): The BD pin is used to provide current to the
internal boost Schottky diode.
FB (Pin 3): The LT3502/LT3502A regulate their feedback
pin to 0.8V. Connect the feedback resistor divider tap to
this pin. Set the output voltage according to VOUT = 0.8(1
+ R1/R2). A good value for R2 is 10k.
SHDN (Pin 4): The SHDN pin is used to put the LT3502 in
shutdown mode. Tie to ground to shut down the LT3502/
LT3502A. Tie to 2V or more for normal operation. If the
shutdown feature is not used, tie this pin to the VIN pin.
The
SHDN pin also provides soft-start and frequency
foldback. To use the soft-start feature, connect R3 and
C4 to the
SHDN pin. SHDN Pin voltage should not be
higher than VIN.
GND (Pin 5): Ground Pin.
DA (Pin 6): Connect the catch diode (D1) anode to this
pin. This pin is used to provide frequency foldback in
extreme situations.
BOOST (Pin 7): The BOOST pin is used to provide a drive
voltage, higher than the input voltage, to the internal bipolar
NPN power switch. Connect a boost capacitor from this
pin to SW Pin.
SW (Pin 8): The SW pin is the output of the internal power
switch. Connect this pin to the inductor, catch diode and
boost capacitor.
Σ
R
DRIVER
Q1
S
OSC
SLOPE
COMP
FREQUENCY
FOLDBACK
INT REG
AND
UVLO
VC
gm
0.8V
3502 BD
Q
BOOST
BD
SW
DA
GND
FB
R2
R1
VOUT
L1
C3
C1
D1
VIN
C2
VIN
ON OFF
C4
R3
SHDN
1
4
3
5
6
8
7
2
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| LT3502IDCTRMPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Down 3-40V DFN8EP |
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| LT3502IMS#TRPBF | 功能描述:IC REG BUCK ADJ 0.5A 10MSOP 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: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:- 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) 供應商設備封裝:10-MSOP 裸露焊盤 |
| LT3502IMS-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.1MHz/2.2MHz, 500mA Step-Down Regulators in 2mm × 2mm DFN and MS10 |
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