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LTC1514IS8-3.3 Datasheet(PDF) 4 Page - Linear Technology |
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LTC1514IS8-3.3 Datasheet(HTML) 4 Page - Linear Technology |
4 / 8 page 4 LTC1514-3.3/LTC1514-5 TYPICAL PERFORMANCE CHARACTERISTICS LTC1514-5 Step-Up Mode Load Transient Response LTC1514-5 Step-Down Mode Load Transient Response 50mA 0mA VOUT AC COUPLED 100mV/DIV IOUT 50mA/DIV VIN = 8V, VOUT = 5V, COUT = 10µF, TA = 25°C 1514 G10 VOUT AC COUPLED 100mV/DIV IOUT 50mA/DIV VIN = 3.3V, VOUT = 5V, COUT = 10µF, TA = 25°C 1514 G11 BLOCK DIAGRAM – + – + 650kHz OSCILLATOR 1.145V VREF STEP-UP/STEP-DOWN CHARGE PUMP VIN VOUT LBI 1514 BD C1– C1+ SHDN LBO GND SHDN (Pin 1): Shutdown Input. A logic low on the SHDN pin puts the part into shutdown mode. A logic high (VSHDN ≥ 1.6V) enables the charge pump regulator. At high VIN voltages, the SHDN pin may still be controlled with 3V logic without causing a large rise in VIN quiescent current. The SHDN pin may not float; connect to VIN if unused. PIN FUNCTIONS LBO (Pin 2): Open-Drain, Low-Battery Comparator Out- put. This pin will pull low whenever the voltage on the LBI pin is less than the internal reference voltage (1.145V typ). LBI (Pin 3): Low-Battery Comparator Input. The voltage on this pin is compared to the internal reference voltage (1.145V). The LBO output will sink current when the voltage on the LBI pin is less than 1.145V typ. The low- |
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