DESCRIPTION
The SCI7631, SCI7638 series of CMOS switching regulators provide input voltage step-up and regulation to a specified fixed voltage using an external coil. The devices in these series incorporate precision, low-power reference voltage generators and transistors for driving an internal comparator. They feature low power consumption, low operating voltages, voltage detection and standby operation.
The devices offer a range of fixed output voltages, from 2.0 to 5.0V. The SCI7631 series features battery backup and power-on clear, the SCI7638 series features power-on clear and response compensation, the SCI7638 series offer an output voltage temperature characteristic for driving an LCD. They are available in 8-pin SOP3s.

FEATURES
• 0.9V (Min.) operating voltage
• 10µA (Typ.) maximum current consumption
• Standby operation
• 3µA (Typ.) standby current consumption
• 1.05 ±0.05V high-accuracy voltage detection
• Battery backup (available on SCI7631 series)
• On-chip RC oscillator
• Power-on clear (available on SCI7631 and SCI7638
   series)
• Output voltage temperature characteristic for driving
   an LCD (available on SCI7638 series)
• 8-pin SOP3

APPLICATIONS
• Fixed-voltage power supplies for battery-operated
   equipment such as portable video cassette recorders,
   video cameras and radios
• Power supplies for pagers, memory cards, calculators
   and similar hand-held equipment
• Fixed-voltage power supplies for medical equipment
• Fixed-voltage power supplies for communications
   equipment
• Power supplies for microcomputers
• Uninterruptable power supplies
• LCD panel supplies