S-13D1 Datasheet, PDF (20/45 Pages) Seiko Instruments Inc – SUPER-SMALL PACKAGE 2-CIRCUIT BUILT-IN DELAY FUNCTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR

SUPER-SMALL PACKAGE 2-CIRCUIT BUILT-IN DELAY FUNCTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-13D1 Series
Rev.1.3_01
4. Discharge shunt function (S-13D1 Series B / C / E / F type)
The S-13D1 Series B / C / E / F type has a built-in discharge shunt circuit to discharge the output capacitance.
The output capacitance is discharged as follows so that the VOUT pin reaches the VSS level.
(1) The ON / OFF pin is set to OFF level.
(2) The output transistor is turned off.
(3) The discharge shunt circuit is turned on.
(4) The output capacitor discharges.
Since the S-13D1 Series A / D type does not have a discharge shunt circuit, the VOUT pin is set to the VSS level
through several hundred kΩ internal divided resistors between the VOUT pin and the VSS pin. The S-13D1 Series B /
C / E / F type allows the VOUT pin to reach the VSS level rapidly due to the discharge shunt circuit.
Output transistor: OFF
*1
VIN
S-13D1 Series
VOUT
ON / OFF
ON / OFF circuit
ON / OFF pin: OFF
Discharge shunt circuit
: ON
*1
Current flow
VSS
*1. Parasitic diode
Figure 26
Output
capacitor
(C_L)
GND
20