S-19500A03A-E8T1U4 Datasheet, PDF (18/52 Pages) Seiko Instruments Inc – CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION

FOR AUTOMOTIVE 125°C OPERATION HIGH-WITHSTAND VOLTAGE CMOS VOLTAGE REGULATOR WITH WATCHDOG TIMER AND RESET FUNCTION
S-19500/19501 Series
Rev.1.2_01
 Standard Circuits
1. S-19500 Series (Product with watchdog enable function)
Input
C_IN^*1
C_DLY^*3
VIN
VOUT
WEN WO / RO
WI
DLY
WADJ
VSS
R_extR^*5
R_W
*4
ADJ,ext
Output
C_L^*2
Single GND _GND
Figure 32
2. S-19501 Series (Product without watchdog enable function)
Input
C_IN^*1
C_DLY^*3
VIN
VOUT
RO
WI
WO
DLY
WADJ
VSS
R_extR^*5
R_extW^*5
R_W
*4
ADJ,ext
Output
C_L^*2
Single GND _GND
Figure 33
*1. CIN is a capacitor for stabilizing the input.
*2. CL is a capacitor for stabilizing the output. A ceramic capacitor of 2.2 μF or more can be used.
*3. CDLY is the delay time adjustment capacitor.
*4. RWADJ,ext is the watchdog activation threshold current adjustment resistor.
*5. RextR and RextW are the external pull-up resistors for the reset output pin and the watchdog
output pin, respectively. Connection of the external pull-up resistor is not absolutely essential
since the S-19500/19501 Series has a built-in pull-up resistor.
Caution The above connection diagram and constants will not guarantee successful operation. Perform
thorough evaluation using an actual application to set the constants.
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