S1F76300 Series

Notes

■100μH ≤ L ≤ 1mH, C ≤ 10μF, D = Schottky diode

■S1F76310M1A0

•Peff = 70% when L = 220μH (leadless inductor), VI1 = 1.5V, fCLK = 32kHz, IO = 4mA

•Peff = 75% when L = 220μH (drum coil),

VI1 = 1.5V, fCLK = 32kHz, IO = 6mA

•Peff = 80% when L = 300μH (toroidal coil), VI1 = 1.5V, fCLK = 32kHz, IO = 7mA

■S1F76310M1B0

•Peff = 70% when L = 220μH (leadless inductor), VI1 = 1.5V, fCLK = 32kHz, IO = 8mA

•Peff = 75% when L = 220μH (drum coil),

VI1 =1.5V, fCLK = 32kHz, IO = 9mA

•Peff = 80% when L = 300μH (toroidal coil), VI1 = 1.5V, fCLK = 32kHz, IO = 10mA

External components

The performance characteristics of switching regulators depend greatly on the choice of external components. Observing the following guidelines will ensure high performance and maximum efficiency.

Inductor

Use an inductor with low direct-current resistance and low losses.

Leadless

Pre-wound, leadless inductors using surface-mount technology are the most suitable for portable equipment and other space-critical applications.

Drum coil

Avoid using drum coils because their magnetic field can induce noise.

Toroidal coil

Use a toroidal coil to virtually eliminate magnetic field leakage, reduce losses and improve performance.

Diode

Use a Schottky barrier diode with a high switching speed and low forward voltage drop, VF.

Capacitor

To minimize ripple voltages, use a capacitor with a small equivalent direct-current resistance for smooth- ing.

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EPSON

S1F70000 Series Technical Manual