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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LT1317 датащи(PDF) 6 Page - Linear Technology |
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LT1317 датащи(HTML) 6 Page - Linear Technology |
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6 / 16 page  6 LT1317/LT1317B TYPICAL PERFOR A CE CHARACTERISTICS Load Regulation (LT1317) VIN = 1.5V ILOAD 25mA/DIV 1317 TPC19 VOUT = 5V VOUT 50mV/DIV DC COUPLED OFFSET ADDED Load Regulation (LT1317) VIN = 2V ILOAD 25mA/DIV 1317 TPC20 VOUT = 5V VOUT 50mV/DIV DC COUPLED OFFSET ADDED Load Regulation (LT1317) VIN = 2.5V ILOAD 50mA/DIV 1317 TPC21 VOUT = 5V VOUT 50mV/DIV DC COUPLED OFFSET ADDED Load Regulation (LT1317) VIN = 1.5V ILOAD 25mA/DIV 1317 TPC22 VOUT = 3.3V Load Regulation (LT1317) VIN = 2V ILOAD 50mA/DIV 1317 TPC23 VOUT = 3.3V Load Regulation (LT1317) VIN = 2.5V ILOAD 50mA/DIV 1317 TPC24 VOUT = 3.3V VOUT 50mV/DIV DC COUPLED OFFSET ADDED VOUT 50mV/DIV DC COUPLED OFFSET ADDED VOUT 50mV/DIV DC COUPLED OFFSET ADDED Note: For load regulation pictures, double lines are due to output capacitor ESR. VC (Pin 1): Compensation Pin for Error Amplifier. Con- nect a series RC network from this pin to ground. Typical values for compensation are a 33k/3.3nF combination. A 100pF capacitor from the VC pin to ground is optional and improves noise immunity. Minimize trace area at VC. FB (Pin 2): Feedback Pin. Reference voltage is 1.24V. Connect resistor divider tap here. Minimize trace area at FB. Set VOUT according to: VOUT = 1.24V(1 + R1/R2). SHDN (Pin 3): Shutdown. Pull this pin low for shutdown mode (only the low-battery detector remains active). Leave this pin floating or 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). PIN FUNCTIONS GND (Pin 4): Ground. Connect directly to local ground plane. SW (Pin 5): Switch Pin. Connect inductor/diode here. Minimize trace area at this pin to keep EMI down. VIN (Pin 6): Supply Pin. Must be bypassed close to the pin. LBI (Pin 7): Low-Battery Detector Input. 200mV refer- ence. Voltage on LBI must stay between ground and 700mV. Low-battery detector remains active in shutdown mode. LBO (Pin 8): Low-Battery Detector Output. Open collec- tor, can sink 10 µA. A 1MΩ pull-up is recommended. |
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