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參數(shù)資料
| 型號： | LT3502IDC#TR |
| 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)： | 7/20頁 |
| 文件大?。?/td> | 457K |
| 代理商： | LT3502IDC#TR |
LT3502/LT3502A
15
3502f
APPLICATIONS INFORMATION
+
LT3502
2.2
μF
VIN
20V/DIV
IIN
5A/DIV
20
μs/DIV
VIN
CLOSING SWITCH
SIMULATES HOT PLUG
IIN
(9a)
(9b)
(9c)
LOW
IMPEDANCE
ENERGIZED
24V SUPPLY
STRAY
INDUCTANCE
DUE TO 6 FEET
(2 METERS) OF
TWISTED PAIR
+
LT3502
2.2
μF
10
μF
35V
AI.EI.
LT3502
2.2
μF
0.1
μF
1
Ω
3502 F09
VIN
20V/DIV
IIN
5A/DIV
20
μs/DIV
VIN
20V/DIV
IIN
5A/DIV
20
μs/DIV
DANGER!
RINGING VIN MAY EXCEED
ABSOLUTE MAXIMUM
RATING OF THE LT3502
Figure 9. A Well Chosen Input Network Prevents Input Voltage Overshoot and
Ensures Reliable Operation When the LT3502 is Connected to a Live Supply
Figure 10. Model for Loop Response
–
+
–
+
800mV
SW
VC
LT3502
GND
3502 F10
R1
OUT
ESR
ERROR
AMPLIFIER
CURRENT MODE
POWER STAGE
FB
R2
1M
RC
150k
CC
70pF
C1
gm =
100
μA/V
gm =
1A/V
+
CPL
0.5V
current peaks at 20A. One method of damping the tank
circuit is to add another capacitor with a series resistor to
the circuit. In Figure 9b an aluminum electrolytic capacitor
has been added. This capacitor’s high equivalent series
resistance damps the circuit and eliminates the voltage
overshoot. The extra capacitor improves low frequency
ripple ltering and can slightly improve the efciency of the
circuit, though it is likely to be the largest component in the
circuit. An alternative solution is shown in Figure 9c. A 1
Ω
resistor is added in series with the input to eliminate the
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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(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 |
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