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NCP1521 데이터시트(PDF) 3 Page - ON Semiconductor |
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NCP1521 데이터시트(HTML) 3 Page - ON Semiconductor |
3 / 17 page NCP1521 http://onsemi.com 3 PIN FUNCTION DESCRIPTION Pin No. TSOP5 Pin No. UDFN6 Symbol Function Description 1 3 VIN Analog Input Power Supply Input for Analog VCC. 2 2, 4 GND Analog/Power Ground Ground connection for the NFET Power Stage and the Analog Sections of the IC. 3 1 EN Digital Input Enable for Switching Regulator. This pin is active high. Do not float this pin. 4 6 FB Analog Input Feedback voltage from the output of the power supply. This is the input to the error amplifier. 5 5 LX Analog Output Connection from Power MOSFETs to the Inductor. For one option, an output discharge circuit sinks current from this pin. Figure 5. Pin Connections − TSOP5 Figure 6. Pin Connections − UDFN6 (Top View) 1 2 3 5 4 VIN GND EN LX FB 1 2 3 6 4 EN GND VIN FB GND PIN CONNECTIONS 5 LX MAXIMUM RATINGS Rating Symbol Value Unit Minimum Voltage All Pins Vmin −0.3 V Maximum Voltage All Pins (Note 2) Vmax 7.0 V Maximum Voltage Enable, FB, LX Vmax VIN + 0.3 V Thermal Resistance, Junction −to−Air TSOP5 UDFN6 RqJA 200 TBD _C/W Operating Ambient Temperature Range TA −40 to 85 _C Storage Temperature Range Tstg −55 to 150 _C Junction Operating Temperature Tj −40 to 125 _C Latch−up Current Maximum Rating (TA = 85°C) (Note 4) Lu +/−100 mA ESD Withstand Voltage (Note 3) Human Body Model Machine Model Vesd 2.0 200 kV V Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. 1. Maximum electrical ratings are defined as those values beyond which damage to the device may occur at TA = 25°C. 2. According to JEDEC standard JESD22−A108B. 3. This device series contains ESD protection and exceeds the following tests: Human Body Model (HBM) per JEDEC standard: JESD22−A114. Machine Model (MM) per JEDEC standard: JESD22−A115. 4. Latchup current maximum rating per JEDEC standard: JESD78. |
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