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参数资料
| 型号： | LT1676S |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.7 A SWITCHING REGULATOR, 250 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | SO-8 |
| 文件页数： | 2/6页 |
| 文件大小： | 301K |
| 代理商： | LT1676S |
Automotive 12V, 24V and 42V Systems
DC/DC Conversion Solutions – InfoCard 21
2
Linear Technology in 42V Automotive Power
DC/DC conversion is a specialty of Linear Technology Corporation. We offer an extensive line of innovative circuits for
automotive systems including switching regulators that operate to 60V or higher for the new 42V standard. These
integrated circuits are available tested and guaranteed for the automotive temperature range.
s High Current 42V Step-Down (to 3V, 5V, 14V, etc.)
LT1339: High Power Synchronous DC/DC Controller – Up to 50A Output
s
Operation to 60V
s
Current Mode Operation
s
Synchronous Dual N-Channel Drive
42VIN, 5VOUT at 50A High Power Buck Converter
+
1
8
0.1
F
1
F
15
10k
1N914
SYNC
IAVG
VC
VREF
SENSE+
SENSE –
FB
TG
TS
BG
13
2
4
3
5
7
10
19
18
16
11
12
9
RUN
5VREF
SLOPE
CT
SGND
12VIN
BOOST
1N914
42V
LT1339
PGND
2200pF
4.7k
100k
12V
15k
2200pF
1500pF
1
F
1
F
2200
F
6.3V
OS-CON
5V
50A
IRFZ44
×2
IRFZ44
×4
10
H
50A
RSELECT
3k
RSENSE
0.002
ZTX649
ZTX749
1k
+
47
F
17
20
+
1500
F
63V
×4
RSELECT
18.2K
8.66K
3K
1.66k
1.25k
VOUT
24V
12V
5V
3.3V
2.8V
RSENSE
0.01
0.005
0.002
ILIMIT
10A
20A
50A
12V
3.3V
3A
×10
OUTPUT CURRENT (AMPS)
0
EFFICIENCY
(%)
100
95
90
85
80
75
70
65
60
55
50
40
LT1339 TA02
10
20
30
50
42V to 5V Efficiency Curve
(RSENSE = 0.002)
Burst Mode is a trademark of Linear Technology Corporation.
s
Programmable Average Load Current Limiting
s
Programmable Fixed Frequency Synchronizable to 150kHz
s
Adaptive Nonoverlapping Gate Drive Prevents Shoot-Through
LTC1149: High Efficiency Synchronous DC/DC Controller – 60V Operation
s
Synchronous FET Switching for High Efficiency
s
Adaptive Nonoverlap Gate Drives
s
16-Pin Narrow SO Package
s
Operation to 60V, to 5A Output
s
Constant Off-Time Current Mode Operation, to 250kHz
s
High Efficiency over Wide Current Range
s
Automatic Burst Mode
TM Operation
s
Logic-Controlled Micropower Shutdown
10V-48V to 5V/2A High Voltage Buck
Converter Measured Efficiency
OUTPUT CURRENT (A)
0.001
50
EFFICIENCY
(%)
70
80
90
100
0.01
0.1
2
60
1
VIN = 12V
VIN = 48V
VIN = 36V
VIN = 24V
10V-48V to 5V/2A High Voltage Buck Converter
C2
UNITED CHEMI-CON (Al) LXF63VB331M12.5 x 30
ESR = 0.170
I
RMS = 1.280A
C4
(Ta)
C10 SANYO (OS-CON) 10SA22OM ESR = 0.035
I
RMS = 2.360A
Q1
IR PMOS BVDSS = 60V RDSON = 0.280 CRSS = 65pF Qg = 19nC
Q2
IR NMOS BVDSS = 60V RDSON = 0.100 CRSS = 79pF Qg = 28nC
VCC
CAP
SD1
SD2
ITH
CT
LTC1149-5
PGATE
VIN
SENSE+
SENSE–
NGATE
D1
1N4148
+
C9
0.01
F
+
VIN
10V
TO 48V
C1
0.1
F
1N4148
C4
1
F
C5
0.1
F
C6
0.068
F
Z5U
R1
1k
C7
3300pF
X7R
C8
680pF
NPO
3
5
16
10
15
7
6
1
4
9
8
13
C3
0.047
F
Z5U
Q1
IRFU9024
Q2
IRFU024
D2
MBR160
C2
330
F
63V
L1
62
H
R2
0.05
5V
2A
C10
220
F × 2
10V
QUIESCENT CURRENT = 1.5mA
TRANSITION CURRENT (Burst Mode
OPERATION/CONTINUOUS
OPERATION) = 570mA
2
11
12
14
SGND PGND
PDRIVE
RGND
D1
SILICON VBR = 75V
D2
MOTOROLA SCHOTTKY VBR = 60V
R2
KRL NP-1A-C1-0R050J Pd = 1W
L1
COILTRONICS CTX62-2-MP DCR = 0.040
MPP CORE
ALL OTHER CAPACITORS ARE CERAMIC
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| LT1677CN8 | 功能描述:IC OPAMP R-R I/O SGL LN 8DIP RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:50 系列:- 放大器类型:通用 电路数:2 输出类型:满摆幅 转换速率:1.8 V/µs 增益带宽积:6.5MHz -3db带宽:4.5MHz 电流 - 输入偏压:5nA 电压 - 输入偏移:100µV 电流 - 电源:65µA 电流 - 输出 / 通道:35mA 电压 - 电源，单路/双路(±):1.8 V ~ 5.25 V，±0.9 V ~ 2.625 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
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