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LTC3531-3 Datasheet(PDF) 5 Page - Linear Technology |
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LTC3531-3 Datasheet(HTML) 5 Page - Linear Technology |
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5 / 16 page  LTC3532 5 3532fc SW2 5V/DIV SW1 5V/DIV INDUCTOR CURRENT 500mA/DIV VOUT 100mV/DIV 4μs/DIV VIN = 4.2V VOUT = 3.3V ILOAD = 20mA COUT = 22μF 3535 G17 SW2 5V/DIV SW1 5V/DIV INDUCTOR CURRENT 500mA/DIV VOUT 100mV/DIV 4μs/DIV VIN = 3.75V VOUT = 3.3V ILOAD = 20mA COUT = 22μF 340612 G16 PI FU CTIO S RT (Pin 1): Timing Resistor to Program the Oscillator Frequency. The programming range is 300kHz to 2MHz. f(kHz) = 48,000 RT(kΩ) BURST (Pin 2): Used to Set the Automatic Burst Mode Op- eration Threshold. Place a resistor and capacitor in parallel from this pin to ground. See the Applications Information section for component value selection. For manual control, ground the pin to force Burst Mode operation, connect to VOUT to force fixed frequency mode. SW1 (Pin 3): Switch Pin Where the Internal Switches A and B are Connected. Connect inductor from SW1 to SW2. An optional Schottky diode can be connected from SW1 to ground. Minimize trace length to minimize EMI. SW2 (Pin 4): Switch Pin Where the Internal Switches C and D are Connected. For applications with output voltages over 4.3V, a Schottky diode is required from SW2 to VOUT to ensure SW2 does not exhibit excess voltage. GND (Pin 5): Signal and Power Ground for the IC. VOUT (Pin 6): Output of the Synchronous Rectifier. A filter capacitor is placed from VOUT to GND. VIN (Pin 7): Input Supply Pin. Supplies current to the inductor through SW1 and supplies internal VCC for the IC. A ceramic bypass capacitor as close to the VIN pin and GND (Pin 5) is required. Switch Pins Before Entering Buck Mode Output Ripple at 100mA Load Burst Mode, Boost TYPICAL PERFOR A CE CHARACTERISTICS T A = 25°C, unless otherwise specified. Burst Mode, Buck-Boost Burst Mode, Buck SW1 2VDIV SW2 2VDIV 40ns/DIV VIN = 4V VOUT = 3.3V ILOAD = 100mA 3535 G13 VOUT 50mV/DIV VOUT 50mV/DIV VOUT 50mV/DIV 400ns/DIV VOUT = 3.6V IOUT = 100mA COUT = 10μF 3535 G14 VIN = 2.4V VIN = 3.6V VIN = 4.5V SW1 5V/DIV SW2 5V/DIV INDUCTOR CURRENT 500mA/DIV VOUT 100mV/DIV 4μs/DIV VIN = 2.4V VOUT = 3.3V ILOAD = 20mA COUT = 22μF 3535 G15 |
Similar Part No. - LTC3531-3 |
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Similar Description - LTC3531-3 |
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