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| 型号： | LT1676IS8 |
| 厂商： | Linear Technology |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 0.7A 8SOIC |
| 标准包装： | 100 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.24 V ~ 51 V |
| 输入电压： | 7.4 V ~ 60 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 100kHz |
| 电流 - 输出： | 700mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 管件 |
| 供应商设备封装： | 8-SOIC |
LT1676
TYPICAL APPLICATIO N S
V IN
12V TO
48V
5
1
V IN
SHDN
V CC
2
D1
+
C1
39 μ F
63V
C5
100pF
6
V SW
LT1676
FB
SYNC V C
3
7
8
L1
MBRS1100 220 μ H
C3
+
C2
100 μ F
10V
R1
36.5k
1%
V OUT
5V
0mA to 500mA
90
80
70
GND
2200pF
X7R
R3
22k
C4
100pF
R2
12.1k
1%
60
50
4
5%
1676 F04a
40
V IN = 12V
V IN = 24V
C1: PANASONIC HFQ
C2: AVX D CASE TPSD107M010R0080
C4, C5: X7R OR COG/NPO
D1: MOTOROLA 100V, 1A, SMD SCHOTTKY
L1: COILCRAFT DO3316P-224
FOR 3.3V V OUT VERSION:
R1: 24.3K, R2: 14.7k
L1: 150 μ H, DO3316P-154
I OUT : 0mA TO 500mA
30 V IN = 36V
V IN = 48V
20
1
10
I LOAD (mA)
100
1000
1676 F04b
Figure 4a. Minimum Component Count Application
Figure 4b. P OUT /P IN Efficiency
V IN
R4
210k
1%
+
C1
1
5
V IN
SHDN
V CC
2
V SW
3
L1
+
V OUT
R5
6.19k
1%
C5
6
LT1676
SYNC
FB
V C
7
8
D1
C2
R1
GND
C3
C4
R2
4
R3
1676 F05
Figure 5. User Programmable Undervoltage Lockout
desired V IN UVLO voltage minus 1.25V applied across it.
(The 2.5 μ A factor is an allowance to minimize error due to
SHDN pin input current.)
Behavior is as follows: Normal operation is observed at the
nominal input voltage of 48V. As the input voltage is
decreased to roughly 43V, switching action will stop, V OUT
will drop to zero, and the LT1676 will draw its V IN and V CC
quiescent currents from the V IN supply. At a much lower
input voltage, typically 18V or so at 25 ° C, the voltage on
12
the SHDN pin will drop to the shutdown threshold, and the
part will draw its shutdown current only from the V IN rail.
The resistive divider of R4 and R5 will continue to draw
power from V IN . (The user should be aware that while the
SHDN pin lockout threshold is relatively accurate includ-
ing temperature effects, the SHDN pin shutdown thresh-
old is more coarse, and exhibits considerably more
temperature drift. Nevertheless the shutdown threshold
will always be well below the lockout threshold.)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| LT1676IS8#TR | 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#TRPBF | 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: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 |
| LT1676IS8PBF | 制造商:Linear Technology 功能描述:Sw. Regulator Step-Down 7.4-60V SOIC8 |
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