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參數(shù)資料
| 型號(hào)： | LT1501IS8-5 |
| 廠(chǎng)商： | LINEAR TECHNOLOGY CORP |
| 元件分類(lèi)： | 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, PDSO8 |
| 封裝： | 0.150 INCH, PLASTIC, SO-8 |
| 文件頁(yè)數(shù)： | 12/16頁(yè) |
| 文件大?。?/td> | 190K |
| 代理商： | LT1501IS8-5 |
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12
LT1500/LT1501
APPLICATIO
S I
FOR
ATIO
U
with an external divider no switch exists and the divider
current remains. There may be additional current drawn
by the adjustable LT1500 in shutdown if the divider
voltage at the feedback node exceeds 0.6V. See Typical
Performance Characteristics.
W
U
U
Loop Stability
The LT1501 is internally compensated since the device
has no spare pin for a compensation point. The LT1500
brings out the V
C
pin to which an external series R
C
network is connected. This provides roll-off for the error
amplifier, ensuring overall loop stability. Typical values
when using tantalum output capacitors are 1000pF and
100k
.
Transient response of Figure 3’s circuit with a 30mA to
100mA load step is detailed in Figure 4. The maximum
output disturbance is approximately 20mV. The “splitting”
of the V
OUT
trace when load current increases to 100mA is
due to ESR of C
OUT
. C
OUT
can be replaced by a ceramic
unit, which has lower ESR, size and cost. Figure 5 shows
transient response to the same 30mA to 100mA load step,
with C
OUT
= 15
μ
F ceramic, C
C
= 2200pF and R
C
= 10k. The
maximum output disturbance in this case is 100mV.
V
IN
GND
LBI
LBO
LT1500
LT1501
R4
274k
1%
R3
301k
1%
470k
LT1500/01 F06
V
CC
PULL-UP RESISTOR
SHOULD BE AT LEAST
FIVE TIMES SMALLER THAN
R5 TO ENSURE LBO
HIGH STATE
R5
10M
Figure 6. Low Battery Detection
I
LOAD
Low-Battery Detector
The low-battery detector is a combined reference and
comparator. It has a threshold of 1.24V with a typical input
bias current of 20nA. In a typical application a resistor
divider is connected across the battery input voltage with
the center tap tied to Low Battery Input (LBI), see Figure
6. The suggested parallel resistance of the divider is 150k
V
500mV/DIV
I
L
500mA/DIV
500
μ
s/DIV
Figure 4. Transient Response of LT1500 with R
C
= 100k,
C
C
= 1000pF and C
OUT
= 220
μ
F. V
OUT
Disturbance is 20mV
30mA
100mA
V
20mV/DIV
AC COUPLED
200
μ
s/DIV
Figure 5. Transient Response of LT1500 with R
C
= 10k, C
C
=
2200pF and C
OUT
=15
μ
F Ceramic. V
OUT
Disturbance is 100mV
30mA
100mA
V
50mV/DIV
AC COUPLED
I
L
500mA/DIV
V
500mV/DIV
I
LOAD
Figure 3. LT1500 2V to 5V Converter
SHDN
V
IN
GND
SW
FB
I
SENSE
PGND
LT1500
1M
332k
+
C
OUT
*
220
μ
F
33
μ
H
CTX33-1
V
OUT
5V
LT1500/01 F03
MBR0520L
V
IN
2V
100pF
R
100k
C
1000pF
*TANTALUM = AVX TPS SERIES
CERAMIC = TOKIN 1E156ZY5U
V
C
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1500CS-3 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LT1505CG-1 | Constant-Current/Voltage High Efficiency Battery Charger |
| LT1505 | Constant-Current/Voltage High Efficiency Battery Charger |
| LT1505CG | Constant-Current/Voltage High Efficiency Battery Charger |
| LT1506I | Octal D-Type Edge-Triggered Flip-Flops With 3-State Outputs 20-SO 0 to 70 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT150-2 | 制造商:MITA 功能描述:150MM PVC CABLE TRAY (2M) |
| LT1502G | 制造商:DIODES 制造商全稱(chēng):Diodes Incorporated 功能描述:1.5A GLASS PASSIVATED RECTIFIER |
| LT1503G | 制造商:DIODES 制造商全稱(chēng):Diodes Incorporated 功能描述:1.5A GLASS PASSIVATED RECTIFIER |
| LT1504-C-6-12 | 制造商:AVIBANK 功能描述: |
| LT1504-C6-3 | 制造商:AVIBANK 功能描述: |
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