Seiko Instruments S8353
PWM Control Switchable Built-in Transistor Switching Regulator
FEATURES
● Low voltage operation: Startup at 0.9 V min. (IOUT = 1 mA) guaranteed● Low current consumption : During operation 18.7 µA (3.3 V, 50 kHz, typ.) During shutdown: 0.5 µA (max.)
● Duty ratio : Built-in PWM / PFM switching control circuit (S-8354 Series) 15 % to 83 % (30 kHz and 50 kHz models) 15 % to 78 % (250 kHz models)
● External parts : Coil, capacitor, and diode
● Output voltage : Selectable in 0.1 V steps between 1.5 and 6.5 V (for VDD / VOUT separate types) Selectable in 0.1 V steps between 2.0 and 6.5 V (for other than VDD / VOUT separate types)
● Output voltage accuracy : ±2.4%
● Oscillation frequency : 30 kHz, 50 kHz, and 250 kHz selectable
● Soft start function : 6 ms (50 kHz, typ.)
APPLICATIONS
● Power supplies for portable equipment such as digital cameras, electronic notebooks, and PDAs● Power supplies for audio equipment such as portable CD / MD players
● Constant voltage power supplies for cameras, VCRs, and communication devices
● Power supplies for microco...