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| S-8540A15FN-IAAT2Z Datasheet, PDF (9/36 Pages) Seiko Instruments Inc – SWITCHABLE SWITCHING REGULATOR CONTROLLER | |||
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STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_01
S-8540/8541 Series
ï® Measurement Circuits
1.
ON/OFF
CVREF A
A
VOUT
VIN
A
A
SENSE
EXT
A
CIN
CVL
A
VSS
Figure 5
2.
RSS
CSS
RSENSE
+
COUT
ON/OFF
VOUT
SENSE
VSS
CVREF
VIN
EXT
Rb
Cb
PSW
+
CIN
VIN
CVL
VON/OFF
L
SD
Figure 6
3.
ON/OFF
CVREF A
A
RFB1
VOUT
VIN
A
CFB
FB
EXT
A
CIN
CVL
A
RFB2
A
SENSE
VSS
Figure 7
4.
RSS
VON/OFF
CSS
CFB RFB1
+
COUT
RFB2
ON/OFF
VOUT
FB
SENSE
RSENSE
VSS
CVREF
VIN
EXT
Rb
PSW
Cb
L
SD
+
CIN VIN
CVL
Figure 8
9
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