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参数资料
| 型号： | LT1676I |
| 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： | 1/16页 |
| 文件大小： | 135K |
| 代理商： | LT1676I |
1
LT1676
Wide Input Range,
High Efficiency, Step-Down
Switching Regulator
I
Wide Input Range: 7.4V to 60V
I
700mA Peak Switch Current Rating
I
Adaptive Switch Drive Maintains Efficiency at High
Load Without Pulse Skipping at Light Load
I
True Current Mode Control
I
100kHz Fixed Operating Frequency
I
Synchronizable to 250kHz
I
Low Supply Current in Shutdown: 30
μ
A
I
Available in 8-Pin SO and PDIP Packages
I
Automotive DC/DC Converters
I
Telecom 48V Step-Down Converters
I
Cellular Phone Battery Charger Accessories
I
IEEE 1394 Step-Down Converters
The LT
1676 is a wide input range, high efficiency Buck
(step-down) switching regulator. The monolithic die in-
cludes all oscillator, control and protection circuitry. The
part can accept input voltages as high as 60V and contains
an output switch rated at 700mA peak current. Current
mode control offers excellent dynamic input supply rejec-
tion and short-circuit protection.
The LT1676 contains several features to enhance effi-
ciency. The internal control circuitry is normally powered
via the V
CC
pin, thereby minimizing power drawn directly
from the V
IN
supply (see Applications Information). The
action of the LT1676 switch circuitry is also load depen-
dent. At medium to high loads, the output switch circuitry
maintains high rise time for good efficiency. At light loads,
rise time is deliberately reduced to avoid pulse skipping
behavior.
The available SO-8 package and 100kHz switching fre-
quency allow for minimal PC board area requirements.
Figure 1
, LTC and LT are registered trademarks of Linear Technology Corporation.
39
μ
F
63V
1676 F01
V
IN
V
CC
V
SW
LT1676
FB
V
C
SHDN
SYNC
2
5
4
3
7
8
1
6
GND
+
100
μ
F
10V
+
MBR160
36.5k
1%
5V
400mA
12.1k
1%
22k
220
μ
H*
2200pF
V
IN
8V TO 50V
100pF
*65T #30 ON MAGNETICS
MPP #55030
I
LOAD
(mA)
1
60
E
70
80
90
10
100
1000
1676 TA01
50
40
30
20
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
V
IN
= 48V
Efficiency vs V
IN
and I
LOAD
FEATURES
DESCRIPTIO
U
APPLICATIU
TYPICAL APPLICATIO
U
相关PDF资料 |
PDF描述 |
|---|---|
| LT1676IS8 | SPST, 150mA PC Mount Pushbutton |
| LT1677C | Low Noise, Rail-to-Rail Precision Op Amp |
| LT1677IN8 | Low Noise, Rail-to-Rail Precision Op Amp |
| LT1677IS8 | Pressure Transducer, Series 19 mm, Compensated, Pressure Range: 0 psi to 5 psi, Gage, 1/4 BSPP, 10 Vdc excitation |
| LT1677CN8 | Low Noise, Rail-to-Rail Precision Op Amp |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1676IN8 | 功能描述:IC REG BUCK ADJ 0.7A 8DIP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT1676IN8#PBF | 功能描述:IC REG BUCK ADJ 0.7A 8DIP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT1676IS8 | 功能描述:IC REG BUCK ADJ 0.7A 8SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT1676IS8#PBF | 功能描述:IC REG BUCK ADJ 0.7A 8SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LT1676IS8#PBF | 制造商:Linear Technology 功能描述:IC STEP-DOWN REGULATOR 8-SOIC 制造商:Linear Technology 功能描述:IC, STEP-DOWN REGULATOR, 8-SOIC |
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