ULTRA LOW CURRENT CONSUMPTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1206 Series
3. Overcurrent protection circuit
An overcurrent protection circuit with the characteristics shown in (1) Output Voltage vs. Output Current (Ta = 25
°C) in “ Characteristics (Typical Data)” is built into the S-1206 Series to protect output transistors from excessive
output current and short circuiting between the VOUT and VSS pins. The current when output short circuiting
(ISHORT) is internally set to 100 mA (typ.) (VOUT ≥ 2.3 V) and the output voltage returns to the normal value when short
circuiting has been released. Note that the overcurrent protection circuit does not function as a circuit for thermal
protection. Therefore, in cases where a short circuiting status may continue for a long time, pay sufficient attention
to the input voltage and load current conditions so that the loss of the IC will not exceed power dissipation of the
package under use conditions, including short circuiting conditions.
VOUT
ISHORT
IOUT
Figure 12 VOUT vs. IOUT Characteristics
Seiko Instruments Inc.
13
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