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NCP1406SNT1 Datasheet(PDF) 3 Page - ON Semiconductor |
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NCP1406SNT1 Datasheet(HTML) 3 Page - ON Semiconductor |
3 / 23 page NCP1406 http://onsemi.com 3 Figure 4. Representative Block Diagram LX PFM ON/OFF Timing Control Driver + − TSD FB Fault Protection VDD UVLO + − Vref Soft−Start PFM Comparator CE GND FB PIN FUNCTION DESCRIPTION Pin Symbol Description 1 CE Chip Enable Pin (1) The chip is enabled if a voltage which is equal to or greater than 0.9 V is applied. (2) The chip is disabled if a voltage which is less than 0.3 V is applied. (3) The chip will be enabled if it is left floating. 2 FB PFM comparator inverting input, and is connected to off−chip resistor divider which sets output voltage. 3 VDD Power supply pin for internal circuit. 4 GND Ground pin. 5 LX External inductor connection pin. MAXIMUM RATINGS Rating Symbol Value Unit Power Supply Voltage (Pin 3) VDD −0.3 to 6.0 V Input/Output Pin LX (Pin 5) LX Peak Sink Current FB (Pin 2) VLX ILX VFB −0.3 to 27 1.5 −0.3 to 6.0 V A V CE (Pin 1) Input Voltage Range VCE −0.3 to 6.0 V Power Dissipation and Thermal Characteristics Maximum Power Dissipation @ TA = 25_C Thermal Resistance, Junction−to−Air PD RqJA 500 250 mW _C/W Operating Ambient Temperature Range TA −40 to +85 _C Operating Junction Temperature Range TJ −40 to +150 _C Storage Temperature Range Tstg −55 to +150 _C 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. This device series contains ESD protection and exceeds the following tests: Human Body Model (HBM) "2.0 kV per JEDEC standard: JESD22−A114 for all pins. Machine Model (MM) "200 V per JEDEC standard: JESD22−A115 for all pins. 2. Latchup Current Maximum Rating: "150 mA per JEDEC standard: JESD78. 3. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: J−STD−020A. |
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