Datasheet 3D Models

ST550PRT, ST563PRC

Power Inductor for Critical Applications

ST550PRT, ST563PRC feature excellent current handling for a part this size; low DCR.

Shielded power inductors.
Tin-silver over copper. Other terminations available at additional cost.

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This series provides greater current handling capability than any other power inductor its size. While requiring only one square centimeter of board space, this inductor can handle up to 36 Amps of current.

These shielded inductors were developed for multi-phase voltage regulators and are ideal for use in DC-DC converters, battery-powered devices and high current power supplies. Their flat wire construction ensures very low DC resistance and offers an excellent performance-toheight ratio. The materials used in these parts eliminate all thermal aging issues.

The ST550PRT is a high efficiency part that features very low core loss. The ST563PRC provides soft saturation and is unaffected by part temperature up to 125°C.

Refer to the comparison curves for L vs Current and ESR vs Frequency for performance differences.

Specifications

Electrical specifications at 25°C.

Low core loss version

Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	DCR ± 8% (mΩ)	SRF typ (MHz) 3	Isat (A) 4	Irms (A) 5
Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	DCR ± 8% (mΩ)	SRF typ (MHz) 3	Isat (A) 4	Irms (A) 5
ST550PRT251MLZ	0.25	0.93	160	35	25
ST550PRT361MLZ	0.36	0.93	140	24	24
ST550PRT561MLZ	0.56	0.93	110	13	25

Soft saturation version

Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	DCR ± 8% (mΩ)	SRF typ (MHz) 3	Isat (A) 4	Irms (A) 5
Part number 1	Inductance (µH) 2 (Tolerance: ±20%)	DCR ± 8% (mΩ)	SRF typ (MHz) 3	Isat (A) 4	Irms (A) 5
ST563PRC361MLZ	0.36	0.93	120	36	24
ST563PRC651MLZ	0.65	1.50	115	24	19
ST563PRC112MLZ	1.10	1.95	95	20	20
ST563PRC162MLZ	1.65	2.53	55	17	20
ST563PRC232MLZ	2.30	3.08	50	16	17

Notes

When ordering, please specify termination and screening codes: e.g. ST563PRC232MLZ.
Inductance measured at 500 kHz, 0.1 Vrms, 0 Adc using a Coilcraft SMD-A fixture in an Agilent/HP 4284A LCR meter or equivalent.
SRF measured on an Agilent/HP 8753ES.
DC current at 25°C that causes a 30% (typ) inductance drop for ST563PRC and 20% (typ) inductance drop for ST550PRT from its value without current.
Current that causes the specified temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings.

Termination:

L = Tin-silver over copper.
T = Tin-silver-copper (95.5/4/0.5). (Special order, added cost)
S = Tin-lead (63/37). (Special order, added cost)

Screening:

Z = Unscreened
Y = Unscreened (SLDC Option A)
W = Unscreened (SLDC Option B)
H = Coilcraft CP-SA-10001 Group A
G= Coilcraft CP-SA-10001 Group A (SLDC Option A)
D = Coilcraft CP-SA-10001 Group A (SLDC Option B)

All screening performed to the document’s latest revision.
Custom screening also available.

Environmental

Ambient temperature range:

–40°C to +85°C with Irms current.

Storage temperature range:

Component: –55°C to +125°C.
Tape and reel packaging: –55°C to +80°C.

Maximum part temperature:

+125°C (ambient + temp rise).

Failures in Time (FIT) / Mean Time Between Failures (MTBF):

See FIT/MTBF Calculations

Performance curves

L vs Current Comparison – 0.36 µH

Current Derating

ESR vs Frequency Comparison – 0.36 µH

L vs Frequency - ST550PRT Series

L vs Current - ST550PRT Series

ESR vs Frequency - ST550PRT Series

L vs Frequency - ST563PRC Series

L vs Current - ST563PRC Series

ESR vs Frequency - ST563PRC Series

Physical characteristics

General specification

Core Material:

ST550PRT: Ferrite
ST563PRC: Powdered iron

Weight:

550PRT: 2.1 g
563PRC: 2.45 – 3.86 g

Packaging:

ST550PRT251 175/7″ reel.
ST550PRT361 175/7″ reel.
ST550PRT561 175/7″ reel.
ST563PRC361   200/7″ reel.
ST563PRC651   175/7″ reel.
ST563PRC112 175/7″ reel.
ST563PRC162 100/7″ reel.
ST563PRC232 100/7″ reel.

Plastic tape: 24 mm wide, 16 mm pocket spacing
ST550PRT251 0.4 mm thick, 6.1 mm pocket depth.
ST550PRT361 0.4 mm thick, 6.1 mm pocket depth.
ST550PRT561 0.4 mm thick, 6.1 mm pocket depth.
ST563PRC361   0.35 mm thick, 4.5 mm pocket depth.
ST563PRC651   0.4 mm thick, 6.1 mm pocket depth.
ST563PRC112    0.4 mm thick, 6.1 mm pocket depth.
ST563PRC162   0.4 mm thick, 7.5 mm pocket depth.
ST563PRC232  0.4 mm thick, 7.5 mm pocket depth.

Soldering/Washing

Moisture Sensitivity Level (MSL):

1 (unlimited floor life at <30°C / 85% relative humidity).

Resistance to soldering heat:

Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles.

Refer to Soldering Coilcraft Components before soldering.

PCB Washing:

Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. See Doc787_PCB_Washing.pdf.