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UC3525ADW 参数 Datasheet PDF下载

UC3525ADW图片预览
型号: UC3525ADW
PDF下载: 下载PDF文件 查看货源
内容描述: 调节脉冲宽度调制器 [Regulating Pulse Width Modulators]
分类和应用: 脉冲
文件页数/大小: 9 页 / 440 K
品牌: TI [ TEXAS INSTRUMENTS ]
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UC1525A/27A  
UC2525A/27A  
UC3525A/27A  
ELECTRICAL CHARACTERISTICS:+VIN = 20V, and over operating temperature, unless otherwise specified, TA = TJ.  
UC1525A/UC2525A  
UC1527A/UC2527A  
UC3525A  
UC3527A  
UNITS  
PARAMETER  
Reference Section  
TEST CONDITIONS  
MIN  
TYP  
MAX  
MIN  
TYP  
MAX  
Output Voltage  
TJ = 25°C  
IN = 8 to 35V  
5.05  
5.10  
10  
5.15  
20  
5.00  
5.10  
10  
5.20  
20  
V
Line Regulation  
V
mV  
mV  
Load Regulation  
IL = 0 to 20mA  
20  
50  
20  
50  
Temperature Stability (Note 5)  
Total Output Variation (Note 5)  
Shorter Circuit Current  
Output Noise Voltage (Note 5)  
Long Term Stability (Note 5)  
Oscillator Section(Note 6)  
Initial Accuracy (Notes 5 & 6)  
Voltage Stability (Notes 5 & 6)  
Temperature Stability (Note 5)  
Minimum Frequency  
Over Operating Range  
Line, Load, and Temperature  
20  
50  
20  
50  
5.00  
5.20  
100  
200  
50  
4.95  
5.25  
100  
V
V
REF = 0, TJ = 25°C  
80  
40  
20  
80  
40  
20  
mA  
10Hz 10kHz, TJ = 25°C  
200 µVrms  
TJ = 125°C  
50  
mV  
TJ = 25°C  
± 2  
± 0.3  
± 3  
± 6  
± 1  
± 6  
120  
± 2  
± 1  
± 3  
± 6  
± 2  
± 6  
120  
%
%
VIN = 8 to 35V  
Over Operating Range  
RT = 200k, CT = 0.1µF  
RT = 2k, CT = 470pF  
%
Hz  
kHz  
mA  
V
Maximum Frequency  
400  
1.7  
3.0  
0.3  
1.2  
400  
1.7  
3.0  
0.3  
1.2  
Current Mirror  
I
RT = 2mA  
2.0  
3.5  
0.5  
2.0  
1.0  
2.2  
2.0  
3.5  
0.5  
2.0  
1.0  
2.2  
Clock Amplitude (Notes 5 & 6)  
Clock Width (Notes 5 & 6)  
Sync Threshold  
TJ = 25°C  
1.0  
2.8  
2.5  
1.0  
2.8  
2.5  
µs  
V
Sync Input Current  
Sync Voltage = 3.5V  
mA  
Error Amplifier Sectio(nVCM = 5.1V)  
Input Offset Voltage  
0.5  
1
5
10  
1
2
1
10  
10  
1
mV  
µA  
Input Bias Current  
Input Offset Current  
µA  
DC Open Loop Gain  
RL 10MΩ  
60  
1
75  
2
60  
1
75  
2
dB  
Gain-Bandwidth Product  
(Note 5)  
AV = 0dB, TJ = 25°C  
MHz  
DC Transconductance  
(Notes 5 & 7)  
TJ = 25°C, 30kΩ ≤ RL 1MΩ  
1.1  
1.5  
1.1  
1.5  
mS  
Output Low Level  
0.2  
5.6  
75  
0.5  
0.2  
5.6  
75  
0.5  
V
V
Output High Level  
3.8  
60  
50  
3.8  
60  
50  
Common Mode Rejection  
Supply Voltage Rejection  
V
V
CM = 1.5 to 5.2V  
IN = 8 to 35V  
dB  
dB  
60  
60  
Note 5: These parameters, although ensured over the recommended operating conditions, are not 100% tested in production.  
Note 6: Tested at fOSC = 40kHz (RT = 3.6kW, CT = 0.01mF, RD = 0W). Approximate oscillator frequency is defined by:  
1
f =  
CT (0.7RT + 3RD )  
Note 7: DC transconductance (gM) relates to DC open-loop voltage gain (AV) according to the following equation: AV = gMRL  
where RL is the resistance from pin 9 to ground. The minimum gM specification is used to calculate minimum AV when the  
error amplifier output is loaded.  
3
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