MLP2012S datasheet(18/50 Pages) SII

18 / 50 page

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM/PFM SWITCHABLE SWITCHING REGULATOR

S-8363 Series

Rev.2.0_01



External Parts Selection

1. Inductor

The recommended L value of the S-8363 Series is 2.2

μH.

Caution When selecting an inductor, be careful about its allowable current. If a current exceeding the

allowable current flows through the inductor, magnetic saturation occurs, substantially lowering

the efficiency and destroying ICs due to large current. Therefore, select an inductor such that IPK

does not exceed the allowable current. The following equations express IPK in the ideal statuses

in the discontinuous and continuous modes :

IPK =

× IOUT × (VOUT + VD*2 − VIN)

fOSC*1

× L

(Discontinuous mode)

IPK =

VOUT + VD*2

VIN

× IOUT +

(VOUT + VD*2

− VIN) × VIN

× (VOUT + VD*2) × fOSC*1 × L

(Continuous mode)

*1.

fOSC : oscillation frequency

*2.

VD is the forward voltage of a diode. The reference value is 0.4 V.

However, current exceeding the above equation flows because conditions are practically not ideal.

Perform sufficient evaluation with actual application.

Table 9 Typical Inductors

Manufacturer

Name

L value

Direct resistor Rated current

Size (L

× W × H）[mm]

TDK Corporation

VLF302510-2R2M

2.2

μH

0.084

Ω max.

1.23 A max.

3.0

× 2.5 × 1.0

VLS3010T-2R2M

2.2

μH

0.116

Ω max.

1.2 A max.

3.0

× 3.0 × 1.0

VLS201610E

2.2

μH

0.276

Ω max.

0.94 A max.

2.0

× 1.6 × 0.95

MLP2012S2R2M

2.2

μH

0.300

Ω max.

0.8 A max.

2.0

× 1.25 × 1.0

Coilcraft, Inc

LPS3010-222ML

2.2

μH

0.220

Ω max.

1.3 A max.

3.0

× 3.0 × 1.0

Murata Manufacturing

Co., Ltd.

LQM2HPN2R2MG0

2.2

μH

0.080

Ω±25%

1.3 A max.

2.5

× 2.0 × 1.0

LQH3NPN2R2NG0

2.2

μH

0.140

Ω±20% 1.25 A max.

2.7

× 3.0 × 1.0

TAIYO YUDEN Co., Ltd.

NR3010T2R2M

2.2

μH

0.114

Ω max.

1.1 A max.

3.0

× 3.0 ×1.0

NR4010T2R2N

2.2

μH

0.180

Ω max.

1.15 A max.

4.0

× 4.0 ×1.0

BRL2518T2R2M

2.2

μH

0.1755

Ω max. 0.85 A max.

2.5

× 1.8 × 1.2

MLP2012S Datasheet(PDF) 18 Page - Seiko Instruments Inc

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