S-8540 Datasheet, PDF (29/36 Pages) Seiko Instruments Inc – STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER

STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.3.2_00
S-8540/8541 Series
Table 12 External parts function
Component Product Name
Inductor
LDR655312T-4R7
CDRH6D28-220
Diode
RB491D
Output
Capacity
F920J476MB
(tantalum
electrolytic)
F931A476MC
Transistor
(MOS FET)
CPH6301
Manufacturer L-Value
DC
Resistance
Maximum
Current
TDK
Corporation
4.7 μH
0.19 Ω
0.9 A
Sumida
Corporation
22.0 μH
0.128 Ω
1.2 A
Rohm
Corporation
Nichicon
Corporation
Forward current 1.0 A at V_F = 0.45 V,
V_rm = 25V
47 μF, 6.3 V
Nichicon
Corporation
47 μF, 10.0 V
Sanyo Electric V_dss =20 V max., V_gss =10 V max.,
Co., Ltd. I_D =3.0 A max., C_iss =360 pF, R_on =110 mΩ
Size (L × W × H)
[mm]
6.5 × 5. 3 × 1.25
7.0 × 7.0 × 3.0
3.0 × 3.1 × 1.3
3.6 × 3.0 × 1.2
6.2 × 3.4 × 2.7
2.9 × 2.8 × 0.9
Seiko Instruments Inc.
29