參數(shù)資料
型號： LTC1142-ADJ
廠商： Linear Technology Corporation
元件分類： 基準電壓源/電流源
英文描述： RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述： 抗輻射高效，5安培開關穩(wěn)壓器
文件頁數(shù)： 15/20頁
文件大?。?/td> 401K
代理商： LTC1142-ADJ
15
LTC1142/LTC1142L/LTC1142HV
APPLICATIU
To prevent stray pickup a 100pF capacitor is suggested
across R1 located close to the LTC1142HV-ADJ/LTC1142L-
ADJ as in Figure 6. The external divider network must be
placed across C
OUT
with the negative plate of C
OUT
returned
to signal ground. Refer to the Board Layout Checklist.
W
U
U
Figure 6. LTC1142-ADJ External Feedback Network
Board Layout Checklist
When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of the
LTC1142. These items are also illustrated graphically in
the layout diagram of Figure 7. In general each block
should be self-contained with little cross coupling for best
performance. Check the following in your layout:
1. Are the signal and power grounds segregated The
LTC1142 signal ground [Pin 3 (17) for the LTC1142, Pin
4 (18) for LTC1142-ADJ] must return to the (–) plate
of
C
OUT
. The power ground returns 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 LTC1142 Sense
–
, Pin 28 (14) connect to a
point close to R
SENSE
and the (+) plate of C
OUT
3. Are the Sense
–
and Sense
+
leads routed together with
minimum PC trace spacing The 1000pF capacitor
R
SENSE
100pF
R2
R1
+
C
OUT
V
OUT
V
FB
[PIN 2(16)]
SGND
[PIN 4(18)]
1142 F06
+
1000pF
28
27
26
25
24
23
22
21
20
19
18
17
16
15
SENSE
–
3
I
TH3
INT V
CC3
C
T3
V
IN3
NDRIVE 5
PGND5
SGND5
SHUTDOWN 5
SENSE
+
5
LTC1142
1
2
3
4
5
6
7
8
9
10
11
12
13
14
+
+
PDRIVE 3
NC
NC
V
IN3
NC
V
IN5
1000pF
3300pF
3300pF
1k
1k
C
T5
+
C
OUT3
R
SENSE3
+
–
V
OUT3
–
+
V
IN3
C
IN3
L1
N-CH
P-CH
1
μ
F
1
μ
F
P-CH
N-CH
C
IN5
D1
D2
L2
+
C
OUT5
+
–
–
+
V
IN5
R
SENSE5
V
OUT5
1142 F07
SHUTDOWN (5V OUTPUT)
SHUTDOWN (3.3V OUTPUT)
BOLD LINES INDICATE HIGH CURRENT PATHS
SENSE
+
3
SHUTDOWN 3
PGND3
NDRIVE 3
V
IN5
C
T5
INT V
CC5
I
TH5
SENSE
–
5
C
T3
+
Figure 7. LTC1142 Layout Diagram (see Board Layout Checklist)
相關PDF資料
PDF描述
LTC1142HV-ADJ RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LTC1142HVCG RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LTC1142HVCG-ADJ RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
LTC1143CS Enclosures; Leaded Process Compatible:Yes; Peak Reflow Compatible (260 C):Yes RoHS Compliant: Yes
LTC1143L-ADJ RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
相關代理商/技術參數(shù)
參數(shù)描述
LTC1142CG 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP 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: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)
LTC1142CG#PBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP 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)
LTC1142CG#TR 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP 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
LTC1142CG#TRPBF 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP 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:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 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 ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR)
LTC1142HV 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual High Efficiency Synchronous Step-Down Switching Regulators
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