S-8880A24-I8T1U datasheet(9/30 Pages) SII

Part #	S-8880A24-I8T1U

Description	ENERGY HARVESTING POWERED BY ULTRA-LOW POWER AND ULTRA-LOW VOLTAGE OPERATION BOOST CHARGE PUMP FOR STEP-UP DC-DC CONVERTER STARTUP

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Manufacturer	SII [Seiko Instruments Inc]

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ENERGY HARVESTING POWERED BY ULTRA-LOW POWER AND ULTRA-LOW VOLTAGE OPERATION BOOST CHARGE PUMP FOR STEP-UP DC-DC CONVERTER STARTUP

Rev.1.0_01

S-8880A Series

9

The following are the connection examples based on the set condition.

The symbols used in the connection diagrams are described in Table 9 below.

Table 9

Element Name

Symbol

Constant

Description

Schottky diode

SD1

−

Preventing a voltage drop of the VDD pin due to output

capacitor CL at step-up DC-DC converter startup

Capacitor

CVDD

CCPOUT

× 0.1 or

lower

Power smoothing capacitor of the step-up DC-DC converter

Schottky diode

SD2

−

Preventing the OUT pin voltage of the S-8880A Series from

exceeding the absolute maximum rating

Pull-down resistor

ROUT

−

Bleeder resistor

R1

−

Preventing the VM pin voltage of the S-8880A Series from

exceeding the absolute maximum rating

Bleeder resistor

R2

−

1. VOUT

≤ 3.0 V, CL ≤ CCPOUT × 0.1, no load

VIN

CIN

VIN

CCPOUT

VIN

OUT

VM

VSS

CL

VVOUT

VDD

VOUT

CPOUT

S-8880A Series

Step-up DC-DC converter

Figure 7

2. VOUT

≤ 3.0 V, CL > CCPOUT × 0.1

VIN

CIN

VIN

CCPOUT

VIN

OUT

VM

VSS

S-8880A Series

VSS

CL

VVOUT

Step-up DC-DC converter

CVDD

VDD

VOUT

CPOUT

SD1

Figure 8

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