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參數(shù)資料
| 型號： | LT1500CS |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 1.3 A SWITCHING REGULATOR, 500 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封裝： | 0.150 INCH, PLASTIC, SO-14 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大小： | 190K |
| 代理商： | LT1500CS |
8
LT1500/LT1501
BLOCK DIAGRA
M
W
–
+
–
+
–
NEGATIVE
ERROR AMP
+
–
+
–
+
BIAS
1.265V
REFERENCE
+
BURST
COMPARATOR
ERROR AMP
CURRENT
COMPARATOR
FIXED
HYSTERESIS
100k
150pF
V
C
FB
NFB
GND
100k
S1
I
1
I
2
VARIABLE
HYSTERESIS
I
SENSE
SW
PGND
R2
Q1
R1
18mV
R
0.28
Rh
IN
SYNC
LBO
1.24V
0.75V
SHDN
LBI
OUTPUT
LTC1500/01 BD
APPLICATIO
S I
FOR
ATIO
U
OPERATION (SEE BLOCK DIAGRAM)
W
U
U
The LT1500 uses a current mode architecture without the
need for an internal oscillator. Switching frequency is
determined by the value of the external inductor used. This
technique allows the selection of an operating frequency
best suited to each application and considerably simplifies
the internal circuitry needed. It also eliminates a
subharmonic oscillation problem common to all fixed
frequency (clocked) current mode switchers. In addition,
it allows for high efficiency micropower operation while
maintaining higher operating frequencies. Because the
power switch (Q1) is grounded, the basic topology used
will normally be a boost converter with output voltage
always higher than the input voltage. Special topologies
such as the SEPIC, flyback and Cuk converter can also be
used when the output voltage may not always be higher
than the input or when full shutdown of the output voltage
is needed. Operation as a boost converter is as follows.
Assume that inductor current is continuous, meaning that
it never drops to zero. When the switch is on, inductor
current will increase with voltage across the inductor
equal to V
IN
. When the switch is off inductor current will
decrease with inductor voltage equal to V
OUT
– V
IN
.
Switching frequency will be determined by the inductor
相關PDF資料 |
PDF描述 |
|---|---|
| LT1500IS | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1501 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1501CS8 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1501CS8-3.3 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1501CS8-5 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT1500CS-3 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Adaptive-Frequency Current Mode Switching Regulators |
| LT1500CS-3/5 | 制造商:Linear Technology 功能描述:3/5V 2 Cell L/Noise Step-Up Conv |
| LT1500CS-5 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Adaptive-Frequency Current Mode Switching Regulators |
| LT1500IS | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Adaptive-Frequency Current Mode Switching Regulators |
| LT1500IS-3 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Adaptive-Frequency Current Mode Switching Regulators |
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