參數(shù)資料
型號: LT3150
廠商: Linear Technology Corporation
英文描述: Fast Transient Response, Low Input Voltage, Very Low Dropout Linear Regulator Controller
中文描述: 快速瞬態(tài)響應(yīng),低輸入電壓,非常低壓差線性穩(wěn)壓器控制器
文件頁數(shù): 17/20頁
文件大?。?/td> 263K
代理商: LT3150
17
LT3150
3150f
Setting the Linear Regulator Output Voltage
Using No R
SENSE
Current Limit
Shutdown Time-Out with Reset
Overvoltage Protection
Shutdown Time-Out with Reset
Basic Thermal Shutdown
Setting Current Limit
Current Limit with Foldback Limiting Example
TYPICAL APPLICATIO S
FB2
3150 TA03
R2
V
OUT
= 1.21V(1 + R2/R1)
V
OUT
R1
C1
10
μ
F
D1
MBR0520L
C
T
I
POS
SHDN2
V
IN1
3150 TA04
V
OUT
Q1
I
NEG
GATE
I
POS
V
IN1
R
SENSE
*
*I
LIM
= 50mV/R
SENSE
R
SENSE
= DISCRETE SHUNT RESISTOR OR
R
SENSE
= KELVIN-SENSED PC BOARD TRACE
ACTIVATING CURRENT LIMIT ALSO ACTIVATES
THE SHDN2 PIN TIMER
3150 TA05
V
OUT
Q2
I
NEG
GATE
I
POS
V
IN1
I
OUT
R4
D1
1N4148
D2
1N4148
R5
3150 TA06
V
OUT
Q3
I
NEG
GATE
R6
50mV
R4
SET R5 << R6
I
OUT
=
R6
R5 + R6
(
)
R5
R5 + R6
(
)
(V
IN1
– V
OUT
– 2V
F
)
R4
R1
100k
C1*
3150 TA07
*C1 = 15
μ
A(t)/1.11V
t = SHUTDOWN LATCHOFF TIME
SHDN2
Q1
VN2222L
RESET
0V TO 5V
SHDN2
3150 TA08
RT1
10k
NTC
V
IN1
R4*
RT1 = DALE NTHS-1206N02
THERMALLY MOUNT RT1
IN CLOSE PROXIMITY
TO THE EXTERNAL
N-CHANNEL MOSFET
*CHOOSE R4 BASED ON
V
AND REQUIRED THERMAL
SHUTDOWN TEMPERATURE
R3
100k
R2
100k
C2*
3150 TA09
*C2 = 15
μ
A(t)/1.11V
t = SHUTDOWN LATCH-OFF TIME
SHDN2
Q2
2N3904
RESET
0V TO 5V
SHDN2
3150 TA10
V
OUT
R5
R6
V
OUT(uth)
= 1.21(R6/R5) + 5
μ
A(R6)
V
OUT(lth)
= 1.11(R6/R5) – 15
μ
A(R6)
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