S-8533A30AFT-TB-G datasheet(6/31 Pages) SII

Part #	S-8533A30AFT-TB-G

Description	STEP-DOWN, SYNCHRONOUS PWM CONTROL SWITCHING REGULATOR CONTROLLER

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Manufacturer	SII [Seiko Instruments Inc]

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STEP-DOWN, SYNCHRONOUS PWM CONTROL SWITCHING REGULATOR CONTROLLER

S-8533 Series

Rev.2.3_00

Seiko Instruments Inc.

6

Electrical Characteristics

Table 3

VIN = VOUT × 1.5 V, IOUT = VOUT/50 A (In case VOUT ≤ 1.8 V, VIN = 2.7 V) (Ta = 25°C unless otherwise specified)

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Measurement

Circuit

Output voltage

*1

VOUT(E)

−

VOUT(S)

× 0.98

VOUT(S)

× 1.02

V

2

Input voltage

VIN

−

2.7

−

16.0

V

1

Current consumption 1

ISS1

No external parts, VOUT = VOUT(S) × 0.95

(Duty ratio 100%)

−

30

70

μA

1

Current consumption

during power-off

ISSS

VON/OFF = 0 V

−

1.0

μA

1

IPDRVH

No external parts, VOUT = VOUT(S) × 1.5,

VIN = 9.0 V, VPDRV = VIN − 0.2 V

−12

−18

−

mA

1

PDRV pin output current

IPDRVL

No external parts, VOUT = VOUT(S) × 0.95,

VIN = 9.0 V, VPDRV = 0.2 V

19

27

−

mA

1

INDRVH

No external parts, VOUT = VOUT(S) × 1.5,

VIN = 9.0 V, VNDRV = VIN − 0.2 V

−10

−14

−

mA

1

NDRV pin output current

INDRVL

No external parts, VOUT = VOUT(S) × 0.95,

VIN = 9.0 V, VNDRV = 0.2 V

35

50

−

mA

1

S-8533A125,

S-8533A13A to 29A

−

VOUT(E)

× 1.0%

VOUT(E)

× 2.5%

V

2

Line regulation

ΔV

OUT1

VIN = VOUT(S) × 1.2 to 16 V

*2

S-8533A30A to 60A

−

VOUT(E)

× 1.0%

VOUT(E)

× 2.0%

V

2

Load regulation

ΔV

OUT2

IOUT = 10 μA to IOUT (see above) × 1.25

−

VOUT(E)

× 0.5%

VOUT(E)

× 1.0%

V

2

Output voltage

temperature coefficient

Δ

V

Ta V

OUT

•

Ta =

−40 to +85°C

−

±100

−

ppm/

°C

−

Oscillation frequency

fOSC

Measure waveform at the PDRV pin.

255

300

345

kHz

2

Maximum duty ratio

MaxDuty

The same condition as lSS1. Measure waveform at

the PDRV pin.

100

−

%

1

VOUT pin input current

IVOUT

VOUT = 5.0 V

0.01

0.1

4.0

μA

1

VSH

The same condition as ISS1.

VIN = 2.7 V and check that PDRV pin = "L".

1.8

−

V

1

ON/

OFF pin input

voltage

VSL

The same condition as ISS1.

VIN = 16.0 V and check that PDRV pin = "H".

−

0.3

V

1

ISH

The same condition as ISS1. VON/OFF = VIN

−0.1

−

0.1

μA

1

ON/

OFF pin input

leakage current

ISL

The same condition as ISS1. VON/OFF = 0 V

−0.1

−

0.1

μA

1

Soft-start time

tSS

The same condition as ISS1. Measure time until

PDRV pin oscillates.

5.0

8.0

16.0

ms

1

Efficiency

EFFI

*3, IOUT = 200 to 400 mA, S-8533A33A

−

94

−

%

3

External parts :

Coil :

Sumida Corporation

CD105 (22

μH)

Diode :

Matsushita Electric Industrial Co., Ltd. MA737 (Schottky diode)

Capacitor :

Nichicon Corporation

F93 (16 V, 47

μF, tantalum) × 2

Transistor :

Toshiba Corporation

2SA1213-Y

Base resistance : 1 k

Ω

Base capacitor :

2200 pF

CSS :

4700 pF

CNDRV :

1000 pF

*1. VOUT(S) : Nominal output voltage value

VOUT(E) : Actual output voltage value : VIN = VOUT × 1.5 V, IOUT = VOUT/50 A (If VOUT ≤ 1.8 V, VIN = 2.7 V.)

*2. In case VOUT(S) ≤ 2.2 V, VIN = 2.7 to 16 V

*3. External parts

Coil :

Sumida Corporation

CDRH104R (22

μH)

Capacitor :

Nichicon Corporation

F93 (16 V, 47

μF, tantalum) × 2

P-channel power MOS FET :

Sanyo Electric Co., Ltd. CPH6303 (VGS = 10 V max.)

N-channel power MOS FET :

Sanyo Electric Co., Ltd. CPH6403 (VGS = 10 V max.)

CSS :

4700 pF

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