S8355 datasheet(24/72 Pages) SII

Part #	S8355

Description	STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER

PDF	72 Pages

Scroll/Zoom	100%

Manufacturer	SII [Seiko Instruments Inc]

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

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24 / 72 page

STEP-UP, SUPER-SMALL PACKAGE, 600 kHz, PWM CONTROL or PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER

S-8355/56/57/58 Series

Rev.8.1_01

OFF

ON/

Pin (Shutdown Pin) (SOT-23-5 Package Products of S-8355/56/57/58 Series B, H, F, K, L, M, N and Q

Types)

OFF

pin stops or starts step-up operation.

Setting the

OFF

pin to the “L” level stops operation of all the internal circuits and reduces the current

consumption significantly.

DO NOT use the

OFF

pin in a floating state because it has the structure shown in Figure 13 and is not pulled

up or pulled down internally. DO NOT apply a voltage of between 0.3 V and 0.75 V to the

OFF

pin because

applying such a voltage increases the current consumption. If the

OFF

pin is not used, connect it to the VOUT

pin.

The

OFF

pin does not have hysteresis.

Table 23

OFF

CR oscillation circuit

Output voltage

“H”

Operation

Fixed

“L”

Stop

≅VIN*1

*1.

Voltage obtained by subtracting the voltage drop due to the DC resistance of the inductor and the diode forward

voltage from VIN.

VSS

VOUT

OFF

*1.

VDD for K, L, M and Q types.

Figure 13

OFF

ON/

Pin Structure

S8355 Datasheet(PDF) 24 Page - Seiko Instruments Inc

S8355 Datasheet(HTML) 24 Page - Seiko Instruments Inc

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