S1335 datasheet(29/67 Pages) SII

29 / 67 page

HIGH RIPPLE-REJECTION SOFT-START FUNCTION CMOS VOLTAGE REGULATOR

Rev.1.3_00

S-1335 Series

Seiko Instruments Inc.



Explanation of Terms

1. Low dropout voltage regulator

This voltage regulator has the low dropout voltage due to its built-in low on-resistance transistor.

2. Output voltage (VOUT)

The accuracy of the output voltage is ensured at

±1.0% or ±15 mV

*1 under the specified conditions of fixed input

voltage

*2, fixed output current, and fixed temperature.

*1. When VOUT < 1.5 V:

±15 mV, when VOUT ≥1.5 V: ±1.0%

*2. Differs depending on the product.

Caution If the above conditions change, the output voltage value may vary and exceed the accuracy range

of the output voltage. Refer to " Electrical Characteristics" and " Characteristics (Typical Data)"

for details.

3. Line regulation 







ΔVOUT1

ΔVIN•VOUT

Indicates the dependency of the output voltage on the input voltage. That is, the values show how much the output

voltage changes due to a change in the input voltage with the output current remaining unchanged.

4. Load regulation (

ΔVOUT2)

Indicates the dependency of the output voltage on the output current. That is, the values show how much the output

voltage changes due to a change in the output current with the input voltage remaining unchanged.

5. Dropout voltage (Vdrop)

Indicates the difference between input voltage (VIN1) and the output voltage when; decreasing input voltage (VIN)

gradually until the output voltage has dropped out to the value of 98% of output voltage (VOUT3), which is at VIN =

VOUT(S)

+ 1.0 V.

Vdrop = VIN1

− (VOUT3 × 0.98)

S1335 Datasheet(PDF) 29 Page - Seiko Instruments Inc