s-8460 Seiko Instruments Inc., s-8460 Datasheet - Page 22

• Manufacturer Part Number: s-8460
• Description: Step-up Or Down, Single-coil, Pwm Control Switching Regulator Controller
• Manufacturer: Seiko Instruments Inc.

Measurement Circuit
Remark Values for R
External Parts List for Ripple Data
*1. External parts : R
*2. External parts : R
*3. External parts : R
22
STEP-UP OR DOWN, SINGLE-COIL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8460
A
(31)
(32)
(33)
(34)
(35)
No.
+
F93
47 μF
+
F93
47 μF
S-8460B00AFT
Table 5 External Parts for Input Voltage vs. Ripple Voltage Characteristics Data
Product Name
CPH6401
0.1 μF
CPH6401
FB1
FB1
FB1
FB1
, R
= 230 kΩ, R
= 150 kΩ, R
= 400 kΩ, R
RB411D
4.7 μF
FB2
, and C
Voltage
Output
3.3 V
2.5 V
5.0 V
BST
EXT1
LX
EXT2
VL
T
*1
*2
*3
CPRO
FB2
FB2
FB2
fzfb
ON/OFF
= 100 kΩ, C
= 100 kΩ, C
= 100 kΩ, C
differ according to the output.
CDRH104R/22 μH
CDRH104R/10 μH
CDRH104R/47 μH
CDRH104R/22 μH
CDRH104R/22 μH
VSS DVSS
Inductor
Figure 14
Seiko Instruments Inc.
VIN
fzfb
fzfb
fzfb
CDRH104R
22 μH
= 330 pF
= 470 pF
= 220 pF
4700 pF
EXT3
CSS
FB
Transistor
CPH6401
CPH6401
MA2Q737
R
230 kΩ
R
100 kΩ
F B1
FB2
Diode SD1
MA2Q737
C
230 pF
fz fb
F93
47 μ F
+
Capacitor
47 μF × 2
Output
+
F93
47 μF
I
OUT
47 μF × 2, 0.1 μF
Rev.2.1
Capacitor
Input
_00