S-8351A20MC-J2FT2X Datasheet, PDF (4/51 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
 Product Name Structure
The product types, output voltage, and packages for the S-8351/8352 Series can be selected at the user’s request.
Please refer to the “3. Product Name” for the definition of the product name, “4. Package” regarding the package
drawings and “5. Product Name List” for the full product names.
1. Function List
(1) Built-in Power MOS FET Type
Product Name
S-8351AxxMC
Controll
system
PFM
Duty
ratio
[%]
50 / 75
S-8351BxxMA
PFM 50 / 75
S-8351CxxMA
PFM
75
S-8351CxxUA
PFM
75
Switching
frequency
[kHz]
100
100
100
100
S-8351DxxMC
PFM 50 / 75
100
Table 1
Shutdown
function
Yes
VDD / VOUT
separate
type
−
Package
SOT-23-5
−
−
SOT-23-3
−
−
SOT-23-3
−
−
SOT-89-3
−
Yes
SOT-23-5
Application
Applications requiring shutdown
function
Applications not requiring
shutdown function
Applications not requiring
shutdown function
Applications not requiring
shutdown function
Applications in which output
voltage is adjusted by external
resistor
(2) External Power MOS FET Type
Product Name
S-8352AxxMC
S-8352BxxMA
S-8352CxxMA
S-8352CxxUA
Controll
System
PFM
Duty
Ratio
[%]
50 / 75
PFM 50 / 75
PFM
75
PFM
75
Switching
Frequency
[kHz]
100
100
100
100
S-8352DxxMC
PFM 50 / 75
100
Table 2
Shutdown
Function
Yes
VDD / VOUT
Separate
Type
−
Package
SOT-23-5
−
−
SOT-23-3
−
−
SOT-23-3
−
−
SOT-89-3
−
Yes
SOT-23-5
Application
Applications requiring shutdown
function
Applications not requiring
shutdown function
Applications not requiring
shutdown function
Applications not requiring
shutdown function
Applications in which output
voltage is adjusted by external
resistor
4