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S-8540B00FN-IMAT2G

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36
STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8540/8541 Series
Rev.4.0_00
28 Seiko Instruments Inc.
Reference Data
This reference data is intended to help you select peripheral components to be externally connected to the
IC. Therefore, this information provides recommendations on external components selected with a view to
accommodating a wide variety of IC applications. Characteristic data is duly indicated in the table below.
Table 9. External components list for efficiency
(Small and thin application using 1.3 mm or less tall components, maximum load current : I
OUT
= 0.9 A)
No. Product Name
Output
Voltage
Modulation f
OSC
Inductor Transistor Diode Output Capacitor
1.1 S-8540A33FN PWM
1.2 S-8541A33FN
3.3 V
PWM/PFM
1.3 S-8540A25FN PWM
1.4 S-8541A25FN
2.5 V
PWM/PFM
1.5 S-8540A18FN PWM
1.6 S-8541A18FN
1.8 V
PWM/PFM
600kHz LDR655312T-4R7 CPH6301 RB491D
F920J476MB
× 2
Table 10 External components list for efficiency
(High efficiency application using 3.0mm or less tall components, maximum load current : I
OUT
= 1.0 A)
No. Product Name
Output
Voltage
Modulation f
OSC
Inductor Transistor Diode Output Capacitor
1.7 S-8540C33FN PWM
1.8 S-8541C33FN
3.3 V
PWM/PFM
1.9 S-8540C25FN PWM
1.10
S-8541C25FN
2.5 V
PWM/PFM
1.11
S-8540C18FN PWM
1.12
S-8541C18FN
1.8 V
PWM/PFM
300kHz CDRH6D28-220 CPH6301 RB491D
F931A476MC
× 1
Table 11 External components list for ripple voltage
No.
Product
Name
Output
Voltage
Modulation f
OSC
Inductor Transistor Diode
Output
Capacitor
2.1
S-8540A33FN PWM
2.2
S-8541A33FN
3.3 V
PWM/PFM
2.3
S-8540A18FN PWM
2.4
S-8541A18FN
1.8 V
PWM/PFM
600kHz LDR655312T-4R7 CPH6301 RB491D
F920J476MB
× 2
2.5
S-8540C33FN PWM
2.6
S-8541C33FN
3.3 V
PWM/PFM
2.7
S-8540C18FN PWM
2.8
S-8541C18FN
1.8 V
PWM/PFM
300kHz CDRH6D28-220 CPH6301 RB491D
F931A476MC
× 1
STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_00
S-8540/8541 Series
Seiko Instruments Inc. 29
Table 12 External parts function
Component Product Name Manufacturer L-Value
DC
Resistance
Maximum
Current
Size (L
× W × H)
[mm]
LDR655312T-4R7
TDK
Corporation
4.7
μH 0.19 Ω
0.9 A
6.5 × 5. 3 × 1.25
Inductor
CDRH6D28-220
Sumida
Corporation
22.0
μH 0.128 Ω
1.2 A
7.0 × 7.0 × 3.0
Diode RB491D
Rohm
Corporation
Forward current 1.0 A at V
F
= 0.45 V,
V
rm
= 25V
3.0
× 3.1 × 1.3
Output
Capacity
F920J476MB
Nichicon
Corporation
47
μF, 6.3 V 3.6 × 3.0 × 1.2
(tantalum
electrolytic)
F931A476MC
Nichicon
Corporation
47
μF, 10.0 V 6.2 × 3.4 × 2.7
Transistor
(MOS FET)
CPH6301
Sanyo Electric
Co., Ltd.
V
dss
=20 V max., V
gss
=10 V max.,
I
D
=3.0 A max., C
iss
=360 pF, R
on
=110 mΩ
2.9
× 2.8 × 0.9
STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8540/8541 Series
Rev.4.0_00
30 Seiko Instruments Inc.
1. Efficiency Characteristics : Efficiency (η) − Output current (I
OUT
)
1. 1 S-8540A33FN
1. 2 S-8541A33FN
50
60
70
80
90
100
1 10 100 1000
I
OUT
(mA)
Efficienc
y
η
(
%
)
V
IN
=4.0 V
(3.3 V, 600 kHz, PWM control)
5.0 V
7.2 V
5
0
6
0
7
0
8
0
9
0
100
5.0 V
7.2 V
(3.3 V, 600 kHz, PWM/PFM control)
1 10 100 1000
I
OUT
(mA)
Efficienc
y
η
(
%
)
V
IN
=
4.0 V
1. 3 S-8540A25FN 1. 4 S-8541A25FN
50
60
70
80
90
100
1 10 100 1000
Efficienc
y
η
(
%
)
(2.5 V, 600 kHz, PWM control)
3.6 V
5.0 V
I
OUT
(mA)
V
IN
=3.0 V
50
60
70
80
90
100
1 10 100 1000
Efficienc
y
η
(
%
)
3.6 V
5.0 V
(2.5 V, 600 kHz, PWM/PFMcontrol)
I
OUT
(mA)
V
IN
=
3.0 V
1. 5 S-8540A18FN 1. 6 S-8541A18FN
50
60
70
80
90
100
1 10 100 1000
Efficienc
y
η
(
%
)
(
1.8 V, 600 kHz, PWM control)
3.6 V
5.0 V
I
OUT
(mA)
V
IN
=2.5 V
50
60
70
80
90
100
1 10 100 1000
Efficienc
y
η
(
%
)
3.6 V 5.0 V
(1.8 V, 600 kHz, PWM/PFM control)
I
OUT
(mA)
V
IN
=2.5 V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36

S-8540B00FN-IMAT2G

Mfr. #:
Buy S-8540B00FN-IMAT2G
Manufacturer:
ABLIC
Description:
Switching Controllers 1.5-6.0V 0.3A Adj
Lifecycle:
New from this manufacturer.
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