方案
设计
Converters | LM2594
概览
LM2594 系列降压开关稳压器是单片集成电路，提供了步降（降压）开关稳压器的所有有效功能，能够驱动 1A 负载，且具有出色线路和负载调节。这些降压开关稳压器都须极少的外部部件，使用简单，包括了内部频率补偿和固定频率振荡器。LM2594 系列以 150 kHz 开关频率运行，因此，比更低频率开关稳压器所需滤波器部件尺寸更小。采用标准 8 引线 PDIP 封装，以及 8 引线 SOIC 表面贴装封装。适用于 LM2594 的标准电感器系列由若干不同制造商提供。此功能大幅简化了开关模式电源的设计。其他功能包括指定输入电压和输出负载条件下保证输出电压的 +/-4% 允差范围，振荡器频率为 +/-15%。包含了外部关断，典型待机电流为 80 uA。自保护功能包括用于降低输出开关电流限制的两级频率，以及用于故障条件下完整保护的高温关断。参见用于 3.0A 的 LM2596，以及用于 1.0A 的 LM2595。
应用
- Simple high-efficiency step-down (buck) regulator
- On-card switching regulators
- Positive to negative converter
终端产品
- LCD-TV SMPS
特性
- Adjustable output voltage range, 1.2V to 37V +/-4% max over line and load
- Available in TO-220 and D2PAK packages
- Guaranteed 0.5A output load current
- Input voltage range up to 40V
- Excellent line and load regulation specifications
- 150 kHz fixed frequency internal oscillator
- TTL shutdown capability
- Low power standby mode, Iq typically 80 µA
- Uses readily available standard inductors
- Thermal shutdown and current limit
搜寻
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产品
LM2594DADJR2G
Active
Pb
A
H
P
SOIC-8
1
260
REEL
2500
Y
Step-Down
Voltage Mode
4.5
40
1.23
0.5
85
150
$0.9968
More Details
LM2594DADJG
Obsolete
Pb
A
H
P
SOIC-8
1
260
TUBE
98
N
Step-Down
Voltage Mode
4.5
40
1.23
0.5
85
150
Price N/A
More Details
LM2594PADJG
Obsolete
Pb
A
H
P
PDIP-8
NA
0
TUBE
50
N
Step-Down
Voltage Mode
4.5
40
1.23
0.5
85
150
Price N/A
More Details
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