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LT1316IS8 Datasheet(PDF) 5 Page - Linear Technology |
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LT1316IS8 Datasheet(HTML) 5 Page - Linear Technology |
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5 / 16 page  5 LT1316 PIN FUNCTIONS LBO (Pin 1): Low-Battery Detector Output. Open collector can sink up to 500 µA. Low-battery detector remains active in shutdown mode. LBI (Pin 2): Low-Battery Detector Input. When voltage at this pin drops below 1.17V, LBO goes low. RSET (Pin 3): A resistor between RSET and GND programs peak switch current. The resistor value should be between 3k and 150k. Do not float or short to ground. This is a high impedance node. Keep traces at this pin as short as possible. Do not put capacitance at this pin. GND (Pin 4): Ground. Connect directly to ground plane. SW (Pin 5): Collector of NPN Power Transistor. Keep traces at this pin as short as possible. VIN (Pin 6): Input Supply. Must be bypassed close to the pin. SHDN (Pin 7): Shutdown. Ground this pin to place the part in shutdown mode (only the low-battery detector remains active). Tie to a voltage between 1.4V and 6V to enable the device. SHDN pin is logic level and need only meet the logic specification (1.4V for high, 0.4V for low). FB (Pin 8): Feedback Pin. Reference voltage is 1.23V. Connect resistive divider tap here. Minimize trace area at FB. Set VOUT according to: VOUT = 1.23V(1 + R1/R2). – + 1.17V A3 LBI A2 DRIVER LB0 L1 R3 = 10R4 1.5V UNDERVOLTAGE LOCKOUT D1 C1 R5 R4 0.5V Q2 ×1 R2 R1 VOUT VIN Q1 ×200 OSCILLATOR 6.3 µs ON 2 µs OFF – + VREF 1.23V FB 2 3 4 7 8 5 6 1 A4 RSET VIN SW GND 1316 F01 SHDN A1 Figure 1. LT1316 Block Diagram BLOCK DIAGRA |
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Similar Description - LT1316IS8 |
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