S-8351A50MC-J3JT2G Datasheet, PDF (2/51 Pages) Seiko Instruments Inc – STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER

STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
S-8351/8352 Series
Rev.3.0_00
„ Block Diagrams
1. S-8351 Series
(1) A Type (With shutdown function)
CONT
Protection
circuit
IC internal
power supply
VOUT
VREF
PFM
+
control
−
circuit
VSS
ON / OFF
Figure 1
(2) B and C Types (Without shutdown function, V_DD / V_OUT non-separate type)
CONT
VOUT
Protection
circuit
IC internal
power supply
VREF
PFM
+
control
−
circuit
VSS
Figure 2
(3) D Type (V_DD / V_OUT separate type)
CONT
IC internal power supply
Protection
circuit
PFM
control
circuit
VDD VOUT
VREF
+
−
VSS
Figure 3
2
Seiko Instruments Inc.