STMicroelectronics A5974D

Overview

Topology	Buck Converter
Input voltage	4-36 V
IC revision	2

Description

The A5974D is a step-down monolithic power switching regulator with a minimum switch current limit of 3.1 A, so it is able to deliver up to 2.5 A DCcurrent to the load depending on the application conditions. The output voltage can be set from 1.235 V to 35 V. The high current level is alsoachieved thanks to an HSOP8 package with an exposed frame, that allows to reduce the Rth(JA) down to approximately 40 °C/W. The device usesan internal P-channel DMOS transistor (with a typical RDS(on) of 250 m) as a switching element to minimize the size of the external components. An internal oscillator fixes the switching frequency at 250 kHz. Having a minimum input voltage of 4 V only it fits the automotive applications requiring the device operation even in cold crank conditions. A pulseby-pulse current limit with the internal frequency modulation offers an effective constant current short-circuit protection.

Features

 Qualified following the AEC-Q100requirements (see PPAP for more details)

2.5 A DC output current
Operating input voltage from 4 V to 36 V
3.3 V / (± 2%) reference voltage
Output voltage adjustable from 1.235 V to 35 V
Low dropout operation: 100% duty cycle
250 kHz internally fixed frequency
Voltage feed-forward
Zero load current operation
Internal current limiting
Inhibit for zero current consumption
Synchronization
Protection against feedback disconnection
Thermal shutdownREMARKS:-TABLE 8.INDUCTOR SELECTION

Typical applications

Dedicated to automotive applications

More information

Products

Order Code	Datasheet	Simulation	Downloads	Status	Product series	L(µH)	I_RP,40K(A)	I_SAT(A)	R_{DC max.}(mΩ)	f_res(MHz)	Size	Version	I_SAT,10%(A)	I_SAT,30%(A)	I_R,40K(A)
74477008	WE-PD SMT Power Inductor, 0.75 µH, 19.5 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_1280_IGS (rev1).igs \| 3.1 MB STP Download_WE-PD_1280_STP (rev1).stp \| 752.4 KB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance0.75 µH	Performance Rated Current19.5 A	–	DC Resistance5 mΩ	Self Resonant Frequency110 MHz	Size1280	VersionStandard	Saturation Current @ 10%27 A	Saturation Current @ 30%35 A	Rated Current17 A
74477004	WE-PD SMT Power Inductor, 4.7 µH, 11 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_1280_IGS (rev1).igs \| 3.1 MB STP Download_WE-PD_1280_STP (rev1).stp \| 752.4 KB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance4.7 µH	Performance Rated Current11 A	–	DC Resistance12 mΩ	Self Resonant Frequency31.2 MHz	Size1280	VersionStandard	Saturation Current @ 10%11 A	Saturation Current @ 30%14.3 A	Rated Current9.5 A
74477006	WE-PD SMT Power Inductor, 6.1 µH, 9.5 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_1280_IGS (rev1).igs \| 3.1 MB STP Download_WE-PD_1280_STP (rev1).stp \| 752.4 KB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance6.1 µH	Performance Rated Current9.5 A	–	DC Resistance14 mΩ	Self Resonant Frequency25 MHz	Size1280	VersionStandard	Saturation Current @ 10%9.5 A	Saturation Current @ 30%12.2 A	Rated Current8.5 A
74477110	WE-PD SMT Power Inductor, 10 µH, 7.7 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_1260_IGS (rev1).igs \| 3.1 MB STP Download_WE-PD_1260_STP (rev1).stp \| 754.9 KB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance10 µH	Performance Rated Current7.7 A	Saturation Current5.5 A	DC Resistance24 mΩ	Self Resonant Frequency21.5 MHz	Size1260	VersionStandard	Saturation Current @ 10%5.5 A	Saturation Current @ 30%7.2 A	Rated Current5 A
744771115	WE-PD SMT Power Inductor, 15 µH, 7 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_1260_IGS (rev1).igs \| 3.1 MB STP Download_WE-PD_1260_STP (rev1).stp \| 754.9 KB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance15 µH	Performance Rated Current7 A	Saturation Current4.5 A	DC Resistance28 mΩ	Self Resonant Frequency16.6 MHz	Size1260	VersionStandard	Saturation Current @ 10%4.5 A	Saturation Current @ 30%5.8 A	Rated Current4.2 A
744771118	WE-PD SMT Power Inductor, 18 µH, 6.7 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_1260_IGS (rev1).igs \| 3.1 MB STP Download_WE-PD_1260_STP (rev1).stp \| 754.9 KB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance18 µH	Performance Rated Current6.7 A	Saturation Current4.2 A	DC Resistance30 mΩ	Self Resonant Frequency15 MHz	Size1260	VersionStandard	Saturation Current @ 10%4.2 A	Saturation Current @ 30%5.5 A	Rated Current4 A
744771122	WE-PD SMT Power Inductor, 22 µH, 6 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_1260_IGS (rev1).igs \| 3.1 MB STP Download_WE-PD_1260_STP (rev1).stp \| 754.9 KB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance22 µH	Performance Rated Current6 A	Saturation Current3.7 A	DC Resistance36 mΩ	Self Resonant Frequency13.5 MHz	Size1260	VersionStandard	Saturation Current @ 10%3.7 A	Saturation Current @ 30%4.8 A	Rated Current3.5 A
744771127	WE-PD SMT Power Inductor, 27 µH, 5.3 A	Simulation	Downloads9 files EDA models: Components ZIP ALT WE-PD (rev25b).IntLib \| 2.3 MB CDS Cadence_WE-PD (rev25b).zip \| 13.4 MB EAG Eagle_WE-PD (rev25a).lbr \| 333.8 KB KIC KiCad_WE-PD (rev25b).zip \| 4.2 MB ZUK CadStar_WE-PD (rev20a).zip \| 36.5 KB CAD files ZIP IGS Download_WE-PD_1260_IGS (rev1).igs \| 3.1 MB STP Download_WE-PD_1260_STP (rev1).stp \| 754.9 KB Electric models ZIP PSP PSpice_WE-PD (rev25a).zip \| 59.6 KB SCS Spectre_WE-PD (rev25a).mod \| 78.4 KB Download all 9 files as zip archive ZIP	Status Activei\| Production is active. Expected lifetime: >10 years.	Product seriesWE-PD SMT Power Inductor	Inductance27 µH	Performance Rated Current5.3 A	Saturation Current3.5 A	DC Resistance45 mΩ	Self Resonant Frequency12 MHz	Size1260	VersionStandard	Saturation Current @ 10%3.5 A	Saturation Current @ 30%4.5 A	Rated Current3.3 A

IC manufacturers (103)

Up to 2.5 A step-down switching regulator for automotive applications