S8540 datasheet(29/36 Pages) SII

Part #	S8540

Description	STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER

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Manufacturer	SII [Seiko Instruments Inc]

Direct Link	http://www.sii.co.jp

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29 / 36 page

STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER

Rev.4.0_01

S-8540/8541 Series

29

Table 12 External parts function

Component

Product Name

Manufacturer

L-Value

DC

Resistance

Maximum

Current

Size (L

× W × H)

[mm]

Inductor

LDR655312T-4R7

TDK

Corporation

4.7

μH

0.19

Ω

0.9 A

6.5

× 5. 3 × 1.25

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 VF = 0.45 V,

Vrm = 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.

Vdss =20 V max., Vgss =10 V max.,

ID =3.0 A max., Ciss =360 pF, Ron =110 m

Ω

2.9

× 2.8 × 0.9

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Similar Description - S8540

Manufacturer	Part #	Datasheet	Description
Seiko Instruments Inc	S-8540	445Kb / 36P	STEP-DOWN, 600 kHz PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
	S8340	3Mb / 55P	STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
	S8520	2Mb / 44P	STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
ABLIC Inc.	S-8520	612Kb / 44P	STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER Rev.9.0_02
Seiko Instruments Inc	S8355	3Mb / 72P	STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
ABLIC Inc.	S-8355	853Kb / 72P	STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER Rev.8.1_02
Seiko Instruments Inc	S-8365AAABA-M5T1Y2	3Mb / 63P	PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
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ABLIC Inc.	S-8353	567Kb / 49P	STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR Rev.3.0_02

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S8540 Datasheet(PDF) 29 Page - Seiko Instruments Inc

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