S-8351A20MC-J2FT2X Datasheet, PDF (8/51 Pages) Seiko Instruments Inc – SWITCHING REGULATOR CONTROLLER

STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
S-8351/8352 Series
Rev.3.0_01
 Pin Configurations
SOT-23-3
Top view
1
2
3
Figure 7
Table 6 S-8351 Series B and C Types
(Without shutdown function, VDD / VOUT non-separate type)
Pin No.
1
2
3
Symbol
VOUT
VSS
CONT
Pin Description
Output voltage pin and IC power supply pin
GND pin
External inductor connection pin (Open-drain output)
Table 7 S-8352 Series B and C Types
(Without shutdown function, VDD / VOUT non-separate type)
Pin No.
Symbol
Pin Description
1
VOUT
Output voltage pin and IC power supply pin
2
VSS
GND pin
3
EXT
External transistor connection pin (CMOS output)
SOT-23-5
Top view
5
4
123
Figure 8
Table 8 S-8351 Series A Type
(With shutdown function, VDD / VOUT non-separate type)
Pin No.
Symbol
Pin Description
Shutdown pin
1
ON / OFF
“H”: Normal operation (Step-up operating)
“L”: Step-up stopped (Entire circuit stopped)
2
VOUT
Output voltage pin and IC power supply pin
3
NC^*1
No connection
4
VSS
GND pin
5
CONT
External inductor connection pin (Open-drain output)
*1. The NC pin indicates electrically open.
Table 9 S-8352 Series A Type
(With shutdown function, VDD / VOUT non-separate type)
Pin No.
Symbol
Pin Description
Shutdown pin
1
ON / OFF
“H”: Normal operation (Step-up operating)
“L”: Step-up stopped (Entire circuit stopped)
2
VOUT
Output voltage pin and IC power supply pin
3
NC^*1
No connection
4
VSS
GND pin
5
EXT
External transistor connection pin (CMOS output)
*1. The NC pin indicates electrically open.
8