S8340 datasheet(29/55 Pages) SII

29 / 55 page

STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER

Rev.4.0_01

S-8340/8341 Series

4.90

4.92

4.94

4.96

4.98

5.00

5.02

5.04

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

VDD (V)

25°C

85°C

= −40°C

S-8340A50A (fOSC : 600 kHz) / S-8340C50A (fOSC : 300 kHz)

(11) Oscillation Start Voltage (VST) vs. Temperature (Ta) (12) Maximum Duty Ratio (MaxDuty) vs. Supply Voltage

(VDD)

0.4

0.5

0.6

0.7

0.8

0.9

1.0

−40

−20

Ta (°C)

S-8340A33A (fOSC : 600 kHz) / S-8340C33A (fOSC :300 kHz)

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

VDD (V)

85°C

25°C

= −40°C

S-8340A33A (fOSC : 600 kHz) / S-8340C33A (fOSC : 300 kH z)

(13) PWM/PFM Switching Duty Ratio (PFMDuty) vs. Supply Voltage (VDD)

S-8341A33A (fOSC : 600 kHz)

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

VDD (V)

85°C

25°C

= −40°C

S-8341C33A (fOSC : 300 kHz)

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

VDD (V)

85°C

25°C

= −40°C

(14) Current Limit Detection Ratio (VSENSE) vs. Supply Voltage (VDD)

105

110

115

120

125

130

135

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

VDD (V)

85°C

25°C

= −40°C

S-8340A33A (fOSC : 600 kHz ) / S-8340C33A (fOSC : 300 kHz)

S8340 Datasheet(PDF) 29 Page - Seiko Instruments Inc

S8340 Datasheet(HTML) 29 Page - Seiko Instruments Inc

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