S-77100/77101 Series www.ablic.com POWER SEQUENCER www.ablicinc.com ABLIC Inc., 2015 Rev.1.0 02 The S-77100/77101 Series is a power sequencer. The S-77100 Series can output enable signals of 4 channels, and controls the external power supply circuit. The S-77100 Series turns on and off the enable signals successively by changing and of the ON pin. The S-77101 Series can output enable signals of 3 channels, and controls the external power supply circuit. The S-77101 Series turns on the enable signals successively by changing the ON pin from to, and turns off the enable signals successively by changing OFF pin from to. The delay time for each enable signal can be set by the external capacitor. Also, the small 8-Pin TSSOP or SNT-8A package makes high-density mounting possible. Features Easy support for sequencing of multiple power supplies. Delay time can be set by the external capacitor. Sequence operations of 4 channels can be controlled by 1 input signal. (S-77100 Series) On-sequence operation and off-sequence operation can be controlled by the separate input signal. (S-77101 Series) Enable output can be increased by cascade connection. Low current consumption: 3.0 A typ. (Off period, power-good period, V = 3.3 V, Ta = 25C) DD Wide range of operation voltage: 2.2 V to 5.5 V Operation temperature range: Ta = 40C to 85C Output form is selectable: CMOS output, Nch open-drain output Output logic is selectable: Active, active Lead-free (Sn 100%), halogen-free: Applications Power sequencing for multiple devices Sequencing for microprocessor and microcontroller Power sequencing for FPGA Power sequencing for TV, camera, printer, etc. Packages 8-Pin TSSOP SNT-8A 1 POWER SEQUENCER S-77100/77101 Series Rev.1.0 02 Block Diagrams 1. S-77100 Series ON Status control circuit UVLO *1 ENBL A Charge / discharge CDLY Comparator selection ENBL B circuit Latch circuit VDD ENBL C VSS ENBL D *1. Selectable as the option Figure 1 2. S-77101 Series ON Status control circuit UVLO OFF *1 ENBL A Charge / discharge CDLY Comparator selection circuit Latch ENBL B circuit VDD VSS ENBL C *1. Selectable as the option Figure 2 2