SSM4567ACBZ-R7 datasheet(27/52 Pages) AD

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Data Sheet

SSM4567

Rev. 0| Page 27 of 52

POWER SUPPLY DECOUPLING

To ensure high efficiency, low total harmonic distortion (THD)

and high PSRR, proper power supply decoupling is necessary.

Noise transients on the power supply lines are short duration

voltage spikes. These spikes can contain frequency components

that extend into the hundreds of megahertz. Both the battery

supply and internally generated VBST must be decoupled with a

good quality, low ESL, low ESR capacitor, with a minimum

value of 10 μF. This capacitor bypasses low frequency noises to

the ground plane. For high frequency transient noises, use a 1 μF

capacitor as close as possible to the VBAT and VBST pins of the

device. If possible, avoid vias between the pins of the capacitor

and the pin of the device. Placing the decoupling capacitors as

close as possible to the SSM4567 helps to maintain good

performance.

Table 20. Suggested Inductors

Part No.

Manufacturer

Value (μH)

Rated Current (mA)

DCR (Ω)

Size (mm)

IFSC1008ABER2R2M01

Vishay Dale

2.2

1850

0.09

2.50 × 2.00 × 1.20

IFSC1111ABER2R2M01

Vishay Dale

2.2

1900

0.098

2.90 × 2.90 × 1.20

MAMK2520T2R2M

Taiyo Yuden

2.2

1900

0.117

2.50 × 2.00 × 1.20

L1210R2R2MDWIT

Kemet

2.2

2000

0.08

3.20 × 2.49 × 2.49

LQM2HPN2R2MGHL

Murata

2.2

1500

0.110

2.5 × 2.00 × 0.90

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