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NCP1550SN18T1 Datasheet(PDF) 2 Page - ON Semiconductor |
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NCP1550SN18T1 Datasheet(HTML) 2 Page - ON Semiconductor |
2 / 18 page NCP1550 http://onsemi.com 2 VOUT 3 GND 2 M1 + − Voltage Reference and Soft−Start A1 TON t TON(PFM) PWM Controller Driver 600 kHz Oscillator 4 1 EXT CE + − CP1 2.2 V + − UVLO 5 VIN Figure 1. Simplified Block Diagram PIN FUNCTION DESCRIPTIONS Pin Symbol Description 1 CE Chip Enable pin, active high (internal pullup current source). By connecting this pin to GND, the switching operation of the controller will be stopped. 2 GND Ground Connection 3 VOUT Output voltage monitoring input. This pin must be connected to the regulated output node as a feedback to on−chip control circuitry. VOUT is internally connected to the on−chip voltage divider that determines the output voltage level. 4 EXT Gate drive for external P−MOSFET 5 VIN Power supply input MAXIMUM RATINGS (TA = 25°C unless otherwise noted) Rating Symbol Value Unit Device Power Supply, VIN (Pin 5) VIN −0.3 to 6.0 V Input/Output Pins CE (Pin 1) VOUT (Pin 3) EXT (Pin 4) VCE VOUT VEXT −0.3 to 6.0 −0.3 to 6.0 −0.3 to 6.0 V Thermal Characteristics TSOP−5 Plastic Package, Case 483−01 Thermal Resistance, Junction−to−Air RqJA 250 °C/W Operating Junction Temperature Range TJ −40 to +150 °C Operating Ambient Temperature Range TA −40 to +85 °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. NOTE: ESD data available upon request. 1. This device series contains ESD protection and exceeds the following tests: Human Body Model (HBM) $2.0 kV per JEDEC standard: JESD22−A114. Machine Model (MM) $200V per JEDEC standard: JESD22−A115. 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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