S-1702 Datasheet, PDF (15/45 Pages) Seiko Instruments Inc – Built-in overcurrent protection circuit

SUPER-LOW CURRENT CONSUMPTION 150 mA VOLTAGE REGULATOR WITH BUILT-IN HIGH-ACCURACY VOLTAGE DETECTOR AND RESET INPUT FUNCTION
Rev.2.2_01
S-1702 Series
 Condition of Application
Input capacitor (CIN):
Output capacitor (CL):
ESR of output capacitor:
1.0 μF or more
1.0 μF or more
10 Ω or less
Caution Generally a series regulator may cause oscillation, depending on the selection of external parts.
Confirm that no oscillation occurs in the application for which the above capacitors are used.
 Selection of VIN Input and VOUT Output Capacitors (CIN, CL)
The S-1702 Series requires an output capacitor (CL) between the VOUT and VSS pins for phase compensation. A
ceramic capacitor with a capacitance of 1.0 μF or more provides a stable operation in all temperature ranges. When
using an OS capacitor, a tantalum capacitor, or an aluminum electrolytic capacitor, a capacitance must be 1.0 μF or
more, and the ESR must be 10 Ω or less.
The output overshoot and undershoot values, which are transient response characteristics, vary depending on the
output capacitor value. The required capacitance value for the input capacitor differs depending on the application.
The recommended application values are CIN ≥ 1.0 μF and CL ≥ 1.0 μF; however, perform thorough evaluation using
the actual device, including evaluation of temperature characteristics.
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