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参数资料
| 型号： | LTC1159 |
| 厂商： | Linear Technology Corporation |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗辐射高效，5安培开关稳压器 |
| 文件页数： | 15/20页 |
| 文件大小： | 400K |
| 代理商： | LTC1159 |
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
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1159_01 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Efficiency Synchronous Step-Down Switching Regulators |
| LTC1159-3.3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Efficiency Synchronous Step-Down Switching Regulators |
| LTC1159-5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Efficiency Synchronous Step-Down Switching Regulators |
| LTC1159CG | 功能描述:IC REG CTRLR BUCK PWM CM 20-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC1159CG#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 20-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
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