S-8355 Datasheet | Seiko Instruments

eatures a PWM/PFM switching controller that can switch the operation to a PFM controller with a duty ratio is 15% under a light load to prevent a decline in the efficiency due to the IC operating current. - Features - Low voltage operation : Startup at 0.9 V min. (IOUT = 1 m A) guaranteed - Low current consumption : During operation 25.9 μA (3.3 V, 100 k Hz, typ.) During shutdown 0.5 μA (max.) - Duty ratio : Built-in PWM/PFM switching control circuit (S-8356/58 Series) 15 to 83% (100 k Hz models) 15 to 78% (250 k Hz, 300 k Hz, and 600 k Hz models) - External parts : Coil, diode, capacitor, and transistor - 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 : 100 k Hz, 250 k Hz, 300 k Hz, 600 k Hz selectable - Soft start function : 6 ms (100 k Hz, typ.) - Shutdown function - Lead-free, Sn 100%, halogen-free- 1 - 1. Refer to “- Product Name Structure” for details. - 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 munications devices - Power supplies for microputers - Packages - SOT-23-3 - SOT-23-5 - SOT-89-3 STEP-UP, SUPER-SMALL PACKAGE, 600 k Hz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER S-8355/56/57/58 Series Rev.8.1_01 - Block Diagrams (1) S-8357/58 Series B, H and F Types (Without Shutdown...