S-8365 Datasheet, PDF (24/63 Pages) Seiko Instruments Inc – STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8365/8366 Series
Rev.1.1_00
„ Standard Circuit
(1) With short-circuit protection (SNT-6A, SOT-23-6)
L
SD
V_OUT
VDD
M1
EXT
V_IN C_IN 0.1 µF
ON/OFF
UVLO
circuit
Triangular wave
oscillation circuit
PWM comparator ^Error
C_FB
amplifier
PWM control, or
PWM / PFM switching
control circuit
+
−
+
−
FB
Timer latch short-circuit
protection circuit
ON/OFF
circuit
Reference voltage
with soft-start circuit
CSP
VSS
R_FB1
R_FB2
C_OUT
(2) Without short-circuit protection (SOT-23-5)
L
Ground point
Figure 20
SD
V_OUT
VDD
M1
EXT
V_IN C_IN 0.1 µF
ON/OFF
UVLO
circuit
Triangular wave
oscillation circuit
PWM comparator ^Error
C_FB
amplifier
PWM control, or
PWM / PFM switching
control circuit
+
−
+
−
FB
ON/OFF
circuit
Reference voltage
with soft-start circuit
VSS
R_FB1
R_FB2
C_OUT
Ground point
Figure 21
24
Seiko Instruments Inc.