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LTC3100EUD-PBF Datasheet(PDF) 10 Page - Linear Technology |
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LTC3100EUD-PBF Datasheet(HTML) 10 Page - Linear Technology |
10 / 24 page LTC3100 10 3100fa PIN FUNCTIONS FBLDO (Pin 11): Feedback Input to the gm Error Amplifier for the LDO Regulator. Connect the resistor divider tap to this pin. The output voltage can be adjusted from 0.6V to 5.25V by: VV R R OUT LDO _ .• =+ ⎛ ⎝⎜ ⎞ ⎠⎟ 0 600 1 4 3 FBBST (Pin 12): Feedback Input to the gm Error Amplifier for the Boost Converter. Connect the resistor divider tap to this pin. The output voltage can be adjusted from 1.5V to 5.25V by: VV R R OUT BOOST _ .• =+ ⎛ ⎝⎜ ⎞ ⎠⎟ 120 1 2 1 MODE (Pin 13): Logic-Controlled Mode Select Pin for Both the Boost and Buck Converters. There is an internal 1MΩ pull-up on this pin to the higher of VINBST, VBST or VINBK. MODE = Float or High: Enables Burst Mode operation for both the boost and the buck. MODE = Low: Disables Burst Mode operation. Both con- verters will operate in fixed frequency mode regardless of load current. RUNBST (Pin 14): Logic-Controlled Shutdown Input for the Boost Converter. There is an internal 4MΩ pull-down on this pin. RUNBST = High: Normal operation RUNBST = Low: Shutdown PGBST (Pin 15): Open-Drain Output That Pulls to Ground When FBBST Is More Than 8% Below Its Regulated Volt- age. Connect a pull-up resistor from this pin to a positive supply less than 6V. VINBST (Pin 16): Input Voltage for the Boost Converter. Connect a minimum of 1μF ceramic decoupling capacitor from this pin to ground. Exposed Pad (Pin 17): The Exposed Pad must be soldered to the PCB ground plane. It serves as the power ground connection, and as a means of conducting heat away from the die. |
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