S-8355 Seiko Instruments, S-8355 Datasheet - Page 12

• Manufacturer Part Number: S-8355
• Description: (S-8355 - S-8358) PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING REGULATOR
• Manufacturer: Seiko Instruments

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12
STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8355/56/57/58 Series
*1.
1
6-Pin SNB(B)
Bottom view
SOT-89-3
Top view
Connect the heatsink of
However, do not use it as
the function of electrode.
Figure 7
1
6
back side at shadowed
area to the board, and set
electric potential open or
VDD.
Figure 8
6
1
Top view
2
2
5
5
2
3
3
4
4
3
*1
*1. The NC pin indicates electrically open.
Pin No.
Pin No.
Pin No.
Pin No.
Seiko Instruments Inc.
*1. The NC pin indicates electrically open.
*1. The NC pin indicates electrically open.
1
2
3
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
(Without shutdown function, V
(With shutdown function, V
(With shutdown function, V
(Without shutdown function, V
Table 19 S-8355/56 Series K, L, M and Q Types
ON
Table 20 S-8357/58 Series B, H, F and N Types
ON
Table 21 S-8357/58 Series E, J, G and P Types
Table 18 S-8357/58 Series B, H and F Types
Symbol
Symbol
Symbol
Symbol
VOUT
VOUT
VOUT
VOUT
VDD
NC
NC
NC
NC
VDD
NC
VSS
EXT
EXT
VSS
EXT
VSS
EXT
VSS
/
/
OFF
OFF
*1
*1
*1
*1
*1
GND pin
Output voltage pin and IC power supply pin
External transistor connection pin
Shutdown pin
Output voltage pin
IC power supply pin
External transistor connection pin
No connection
GND pin
No connection
Shutdown pin
Output voltage pin and IC power supply pin
External transistor connection pin
No connection
GND pin
No connection
Output voltage pin
IC power supply pin
External transistor connection pin
No connection
GND pin
“H”: Normal operation (Step-up operating)
“L”: Step-up stopped (Entire circuit stopped)
“H”: Normal operation (Step-up operating)
“L”: Step-up stopped (Entire circuit stopped)
DD
DD
DD
/ V
Pin Description
/ V
/ V
Pin Description
Pin Description
Pin Description
DD
OUT
OUT
OUT
/ V
non-separate type)
OUT
separate type)
non-separate type)
separate type)
Rev.6.6
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