參數(shù)資料
型號: LTC1159-3. 3
廠商: Linear Technology Corporation
元件分類: 基準電壓源/電流源
英文描述: 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
中文描述: 射頻放大器
文件頁數(shù): 15/20頁
文件大?。?/td> 323K
代理商: LTC1159-3. 3
15
LTC1159/LTC1159-3.3/LTC1159-5
Figure 10. High Efficiency 8V to 20V Input 2.5/5A Output Regulator
P-GATE
V
IN
V
CC
P-DRIVE
V
CC
C
T
I
TH
SENSE
CAP
SHDN2
EXTV
CC
N-GATE
P-GND
S-GND
V
FB
SENSE
+
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
LTC1159
0.15
μ
F
SHUTDOWN
0.1
μ
F
1N4148
1N4148
+
1000pF
2k
10k
10k
1%
0.047
μ
F
3.3
μ
F
1000pF
100pF
100
100
IRF7201
IRF7201
MBRS330
1
μ
F
WIMA
+
47
μ
F
25V
×
2
OS-CON
V
8V TO 20V
5V
L*
15
μ
H
R
**
0.02
+
330
μ
F
6.3V
×
3
AVX
LTC1159 F10
V
2.5V/5A
*MAGNETICS 77120-A7 CORE, 16T 18GA. WIRE
**KRL SL-1-R020J
IRF7205
10k
1%
3.3V
0V
(a) CONTINUOUS MODE OPERATION
3.3V
0V
(b) Burst Mode OPERATION
LTC1159 F09
Figure 9. C
T
Pin 6 Waveforms
Troubleshooting Hints
Since efficiency is critical to LTC1159 applications it is very
important to verify that the circuit is functioning correctly
in both continuous and Burst Mode operation. The wave-
form to monitor is the voltage on the C
T
pin .
In continuous mode (I
LOAD
> I
BURST
) the voltage should be
a sawtooth with a 0.9V
P-P
swing. This voltage should never
dip below 2V as shown in Figure 9a. When the load current
is low (I
LOAD
< I
BURST
), Burst Mode operation should occur
with the C
T
waveform periodically falling to ground as
shown in Figure 9b.
If the C
T
pin is observed falling to ground at high output
currents, it indicates poor decoupling or improper ground-
ing. Refer to the Board Layout Checklist.
TYPICAL APPLICATIU
APPLICATIO
S I
N
FOR
ATIO
U
W
U
相關(guān)PDF資料
PDF描述
LTC1159-5 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1159-5 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Efficiency Synchronous Step-Down Switching Regulators
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