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參數(shù)資料
| 型號： | LTC1159CS |
| 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： | 0.05 A SWITCHING CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SO-16 |
| 文件頁數(shù)： | 14/20頁 |
| 文件大小： | 400K |
| 代理商： | LTC1159CS |
14
LTC1159/LTC1159-3.3/LTC1159-5
APPLICATIU
Board Layout Checklist
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of the
LTC1159. These items are also illustrated graphically in
the layout diagram of Figure 8. Check the following in your
layout:
1) Are the signal and power grounds segregated The
LTC1159 signal ground must connect separately to the
(–) plate of C
OUT
. The other ground pin(s) should return
to the source of the N-channel MOSFET, anode of the
Schottky diode, and (–) plate of C
IN
, which should have
as short lead lengths as possible.
2) Does the LTC1159 Sense
–
pin connect to a point close
to R
SENSE
and the (+) plate of C
OUT
In adjustable
applications, the resistive divider R1, R2 must be con-
nected between the (+) plate of C
OUT
and signal ground.
3
) Are the Sense
–
and Sense
+
leads routed together with
minimum PC trace spacing The differential decoupling
capacitor between the two Sense pins should be as
W
U
U
close as possible to the LTC1159. Up to 100
may be
placed in series with each sense lead to help decouple
the Sense pins. However, when these resistors are
used, the capacitor should be no larger than 1000pF.
4) Does the (+) plate of C
IN
connect to the source of the
P-channel MOSFET as closely as possible An addi-
tional 0.1
μ
F ceramic capacitor between V
IN
and power
ground may be required in some applications.
5) Is the V
CC
decoupling capacitor connected closely be-
tween the V
CC
pins of the LTC1159 and power ground
This capacitor carries the MOSFET driver peak currents.
6) In adjustable versions, the feedback pin is very sensitive
to pickup from the switch node. Care must be taken to
isolate V
FB
from possible capacitive coupling of the
inductor switch signal.
7) Is the SHDN1 pin actively pulled to ground during
normal operation SHDN1 is a high impedance pin and
must not be allowed to float.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
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
SENSE
+
C
OUT
D1
P-CHANNEL
1k
3300pF
C
T
R1
R2
R
SENSE
N-CHANNEL
C
IN
L
+
–
–
+
V
OUT
V
IN
OUTPUT DIVIDER
REQUIRED WITH
ADJUSTABLE
VERSION ONLY
BOLD LINES INDICATE HIGH CURRENT PATHS
LTC1159 F08
1000pF
100pF
+
+
1
μ
F
0.15
μ
F
1N4148
SHUTDOWN
5V EXTV
CC
CONNECTION
+
0.1
μ
F
V
FB
(SHDN1)
Figure 8. LTC1159 Layout Diagram (N and S Packages)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1159CS#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:2,000 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:50% 電源電壓:9 V ~ 10 V 降壓:無 升壓:是 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 包裝:帶卷 (TR) |
| LTC1159CS#TR | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
| LTC1159CS#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
| LTC1159CS-3.3 | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
| LTC1159CS-3.3#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX |
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