S8340 datasheet(13/55 Pages) SII

13 / 55 page

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

Rev.4.0_01

S-8340/8341 Series

(4) 300 kHz, Output Voltage External Setting Type (D Type)

Table 8

(Ta = 25

°C unless otherwise specified)

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Measurement

Circuit

Output voltage*1

VOUT(E)

VIN = 2.4 V, IOUT = 80 mA

3.920

4.000

4.080

FB pin voltage

VFB

VIN = 2.4 V, IOUT = 80 mA

0.980

1.000

1.020

Input voltage

VIN

−

Oscillation start voltage

VST2

No external parts.

The voltage is applied to VDD.

−

0.9

Current consumption 1

ISS1

VOUT = 3.8 V

−

255

460

μA

Current consumption 2

ISS2

VOUT = 4.5 V

−

110

185

μA

Current consumption

at shutdown

ISSS

VOUT = 3.8 V, VON/OFF = 0 V

−

3.0

μA

EXT pin output current

IEXTH

VEXT = VOUT(E)

− 0.2 V

−19

−30

−

IEXTL

VEXT = 0.2 V

−

Line regulation

ΔVOUT1

1.6 V

≤ VIN ≤ 2.4 V, IOUT = 80 mA

−

Load regulation

ΔVOUT2

VIN = 2.4 V, 10

μA ≤ IOUT ≤ 100 mA

−

Output voltage

temperature coefficient*2

ΔVOUT

ΔTa•VOUT

VIN = 2.4 V, IOUT = 80 mA, Ta =

−40 to +85°C

−

±100

−

ppm/°C

Oscillation frequency

fOSC

VOUT = 3.8 V, Measure waveform at the EXT pin

255

300

345

kHz

Maximum duty ratio

MaxDuty

VIN = 3.8 V, Measure waveform at the EXT pin

PWM/PFM switching

duty ratio

(S-8341 Series D type)

PFMDuty VIN = VOUT(E)

− 0.1 V, Under no load

Current limit detection

voltage

VSENSE

VOUT = 3.8 V

Judge oscillation at the EXT pin or oscillation

stop at “L”

120

150

FB pin input current

IFB

VOUT = 6 V, VFB = 1.5 V

−50

−

ON/OFF pin input voltage VSH

VOUT = 3.8 V

Judge oscillation at the EXT pin.

0.8

−

VSL

VOUT = 3.8 V

Judge oscillation stop at the EXT pin.

−

0.3

ON/OFF pin input

leakage current

ISH

VOUT = 6 V, VON/OFF = 6 V

−0.1

−

0.1

μA

ISL

VOUT = 6 V, VON/OFF = 0 V

−0.1

−

0.1

μA

Soft-start time

tSS

VIN = 2.4 V,

CSS = 4700 pF,

S-8340D00

6.0

14.3

28.0

IOUT = 80 mA,

Measure time until oscillation

occurs at the EXT pin.

S-8341D00

6.0

17.2

28.0

Efficiency

EFFI

VIN = 2.4 V, IOUT = 80 mA

−

S8340 Datasheet(PDF) 13 Page - Seiko Instruments Inc

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