S-8540 SII [Seiko Instruments Inc], S-8540 Datasheet - Page 28

• Manufacturer Part Number: S-8540
• Description: STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
• Manufacturer: SII [Seiko Instruments Inc]

(Small and thin application using 1.3 mm or less tall components, maximum load current : I
28
(High efficiency application using 3.0mm or less tall components, maximum load current : I
STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
S-8540/8541 Series
1.10 S-8541C25FN
1.11 S-8540C18FN
1.12 S-8541C18FN
No. Product Name
No. Product Name
No.
1.1
1.2
1.3
1.4
1.5
1.6
1.7 S-8540C33FN
1.8 S-8541C33FN
1.9 S-8540C25FN
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
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.
S-8540A33FN
S-8541A33FN
S-8540A25FN
S-8541A25FN
S-8540A18FN
S-8541A18FN
S-8540A33FN
S-8541A33FN
S-8540A18FN
S-8541A18FN
S-8540C33FN
S-8541C33FN
S-8540C18FN
S-8541C18FN
Product
Name
Voltage
Voltage
Voltage
Output
Output
Output
3.3 V
2.5 V
1.8 V
3.3 V
2.5 V
1.8 V
3.3 V
1.8 V
3.3 V
1.8 V
Table 10 External components list for efficiency
Table 11 External components list for ripple voltage
Table 9. External components list for efficiency
Modulation
Modulation
PWM/PFM
PWM/PFM
PWM/PFM
Modulation
PWM/PFM
PWM/PFM
PWM/PFM
PWM/PFM
PWM/PFM
PWM/PFM
PWM/PFM
PWM
PWM
PWM
PWM
PWM
PWM
PWM
PWM
PWM
PWM
600kHz LDR655312T-4R7 CPH6301 RB491D F920J476MB × 2
300kHz CDRH6D28-220
600kHz LDR655312T-4R7 CPH6301 RB491D F920J476MB × 2
300kHz CDRH6D28-220 CPH6301 RB491D F931A476MC × 1
f
f
f
OSC
OSC
OSC
Seiko Instruments Inc.
Inductor
Inductor
Inductor
Transistor
Transistor
Transistor
CPH6301 RB491D F931A476MC × 1
Diode
Diode
Diode
Output Capacitor
Output Capacitor
OUT
OUT
Capacitor
Rev.3.2
Output
= 0.9 A)
= 1.0 A)
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