Buck Regulators

Image

ST’s monolithic switching regulators offer input-voltage capability up to 61 V, deliver output currents up to 4 A, with high switching frequency.
This broad portfolio of ICs is composed of highly-specialized products to meet every market requirement: HV technology together with high reliability and robustness for industrial and automotive applications, compactness, high efficiency at any load and a high level of performance for consumer and computer products.

These devices embed a full set of protection functions (overcurrent, overvoltage, over-temperature) to increase the MTBF and reduce the number of external components.

There are multiple package options, all offering compactness and high thermal performances to fit different applications.

Part NumberGeneral DescriptionMarketing StatusPackageAutomotive GradeInput Voltage(Vin) min (V)Input Voltage(Vin) max (V)Regulated Output Voltage min (V)Regulated Output Voltage max (V)Output Current-Max(I_OUT_MAX) nom (A)Synchronous rectificationQuiescent current(Iq) typ (mA)Regulator Switching frequency typ ()Inhibit PinSoft-startOther FeaturesOscillator Switching frequency (Internal) min (Hz)Oscillator Switching frequency (Internal) max (Hz)Oscillator Switching frequency (External) min (Hz)Oscillator Switching frequency (External) max (Hz)Junction Temperature(Tj) min (°C)Junction Temperature(Tj) max (°C)
A5970ADUp to 1 A step down switching regulator for automotive applicationsActiveSO-8Yes4361.235361No2.5500YesNoSYNCHRONIZATION/ VREF--500700-40125
A5970DUp to 1 A step down switching regulator for automotive applicationsActiveSO-8Yes4361.235361No2.5250YesNoSYNCHRONIZATION/ VREF--250700-40125
A5972DUp to 1.5 A step down switching regulator for automotive applicationsActiveSO-8Yes4361.235361.5No2.5-NoNoSYNCHRONIZATION/ VREF--250700-40125
A5973ADUp to 1.5 A step down switching regulator for automotive applicationsActivePowerSO-8Yes4361.235361.5No2.5500YesNoSYNCHRONIZATION/ VREF--500700-40125
A5973DUp to 2 A step down switching regulator for automotive applicationsActivePowerSO-8Yes4361.235362No2.5250YesNoSYNCHRONIZATION/ VREF--500700-40125
A5974ADUp to 2 A step down switching regulator for automotive applicationsActivePowerSO-8Yes4361.235362No2.5250YesNoSYNCHRONIZATION/ VREF--500700-40125
A5974DUp to 2.5 A step down switching regulator for automotive applicationsActivePowerSO-8Yes4361.235362.5No2.5250YesNoSYNCHRONIZATION/ VREF--250700-40125
A5975ADUp to 2.5 A step down switching regulator for automotive applicationsActivePowerSO-8Yes4361.235362.5No2.5500YesNoSYNCHRONIZATION/ VREF--500700-40125
A5975DUp to 3 A step down switching regulator for automotive applicationsActivePowerSO-8Yes4361.235363No2.5-YesNoSYNCHRONIZATION/ VREF--250700-40125
A6902DUp to 1 A Switch Step Down regulator with Adjustable Current Limit for Automotive ApplicationsActiveSO-8Yes8361.235361No2.5250NoNoSYNCHRONIZATION/ VREF-----40125
A6985F38 V 0.5 A synchronous step-down switching regulator with 30 uA quiescent currentActiveHTSSOP16Yes4380.85380.5Yes0.03250YesYesAdj. FSW; Adj. Voltage Sup.; fixed 5V and 3.3V available25000020000002500002000000-40150
A698638 V 2 A synchronous step-down switching regulator with 30 uA quiescent currentActiveHTSSOP16Yes4380.85382Yes0.03250YesYesAdj. FSW; Adj. Voltage Sup.25000020000002500002000000-40150
A6986F38 V 1.5 A synchronous step-down switching regulator with 30 uA quiescent currentActiveHTSSOP16Yes4380.85381.5Yes0.03250YesYesAdj. FSW; Adj. Voltage Sup.; fixed 5V and 3.3V available25000020000002500002000000-40150
A7985A2 A step-down switching regulator for automotive applicationsActivePowerSO-8Yes4.5380.6382No2.4250YesYesSYNCHRONIZATION, adj Fsw25010002501000-40125
A7986A3 A step-down switching regulator for automotive applicationsActivePowerSO-8Yes4.5380.6383No2.4250YesYesSYNCHRONIZATION, adj Fsw25010002501000-40125
AST1S313 A DC step-down switching regulatorActiveVFDFPN 8 3x3x1.0Yes2.840.843Yes0.631500YesYes-12001900---40150
AST1S31HFUp to 4 V, 3 A step-down 2.3 MHz switching regulator for automotive applicationsActiveVFDFPN 8 3x3x1.0Yes2.840.843Yes0.632300YesYes17502500----40150
B5973DUp to 2 A step down switching regulator for automotive applicationsActivePowerSO-8Yes4361.235362No2.5250YesNoSYNCHRONIZATION/ VREF--250700-40125
L296HIGH CURRENT SWITCHING REGULATORS; _ActiveMW 15L_9465.1404No-100YesYes-100200100200-40125
L49602.5 A Switching RegulatorActiveHW 7LDS SPLIT V_9465.1402.5No--YesYes-------
L49621.5 A Switching RegulatorActiveHW 7LDS SPLIT V; PDIP 16_9465.1401.5No--YesYes-------
L49631.5 A SWITCHING REGULATORActivePDIP 18; SO-20_9465.1361.5No--YesYes-100300----
L4964High current switching regulator; _ActiveMW 15L_9465.1384No--YesYes-------
L4970A10 A switching regulatorActiveMW 15L_15505.14010No-200NoNo-100500----
L49711.5A Switching Regulator; _ActiveDIP-8; SO-16W_8553.3501.5No2.7-YesYes-100300----
L49722 A SWITCHING REGULATORActivePDIP 20; SO-20_15505.1402No--NoNo-100200----
L49733.5 A Switching RegulatorActivePDIP 18; SO-20_8550.5503.5No2.7200YesYesSYNCHRONIZATION, Vref100300100300--
L4974A3.5 A switching regulatorActivePDIP 20_15505.1404No--NoNo-------
L4975A5 A switching regulatorActiveMW 15L_15505.1405No-200NoNo---100500--
L49761 A step down switching regulatorActiveDIP-8; SO-16W_8550.5501No2.7-NoNo-100300----
L4977A7 A switching regulatorActiveMW 15L_15505.1407No-200NoNo-100500----
L49782A Step down switching regulatorActiveDIP-8; SO-16W_8553.3502No2.7300YesYes-100300----
L5970ADUp to 1 A step down switching regulatorActiveSO-8_4.4361.235361No2.5500YesNoSYNCHRONIZATION/ VREF--500700--
L5970DUp to 1 A step down switching regulatorActiveSO-8_4.4361.235361No2.5250YesNoSYNCHRONIZATION/ VREF--250700--
L5972DUp to 1.5 A step down switching regulatorActiveSO-8_4.4361.235361.5No2.5250NoNoSYNCHRONIZATION/ VREF--250700--
L5973ADUp to 1.5 A step down switching regulatorActivePowerSO-8_4361.235361.5No2.5500YesNoSYNCHRONIZATION/ VREF--500700--
L5973DUp to 2 A step down switching regulatorActivePowerSO-8_4361.235362No2.5250YesNoSYNCHRONIZATION/ VREF--250700--
L5980Up to 0.7 A step down switching regulatorActiveVDFPN 8 3x3x1.0_2.9180.6180.7Yes2.4250YesYesSYNCHRONIZATION, adj Fsw25010002501000--
L5981Up to 1 A step down switching regulatorActiveVDFPN 8 3x3x1.0_2.9180.6181No2.4250YesYesSYNCHRONIZATION, adj Fsw25010002501000--
L5983Up to 1.5 A step down switching regulatorActiveVDFPN 8 3x3x1.0_2.9180.6181.5No2.4250YesYesSYNCHRONIZATION, adj Fsw25010002501000--
L5985Up to 2 A step down switching regulatorActiveVDFPN 8 3x3x1.0_2.9180.6182No2.4250YesYesSYNCHRONIZATION, adj Fsw25010002501000--
L59862.5 A step-down switching regulatorActivePowerSO-8; VDFPN 8 3x3x1.0_2.9180.6182.5No2.4250YesYesSYNCHRONIZATION, adj Fsw25010002501000--
L59873 A step-down switching regulatorActivePowerSO-8; VDFPN 8 3x3x1.0_2.9180.6183No2250YesYesSYNCHRONIZATION, adj Fsw25010002501000--
L5988D4 A continuous (more than 5 A pulsed) step-down switching regulator with synchronous rectificationActiveHTSSOP16_2.9180.6284Yes3400YesYesadj UVLO, adj current limit, Synchronization10010001001000--
L5989D4 A continuous (more than 5 A pulsed) step-down switching regulator with synchronous rectificationEvaluationHTSSOP16_2.9180.6184No3400YesYesadj UVLO, adj current limit, Pgood10010001001000--
L69021 A switching regulator with adjustable current limitActiveSO-8_8361.235361No2.5250NoNoADJUSTABLE CURRENT LIMIT-----40125
L6926High Efficiency Synchronous Step-Down RegulatorActiveMSOP/TSSOP 8; VDFPN 8 3x3x1.0_25.50.65.50.8Yes0.3600Yesyes-5506505001400-40150
L6928High efficiency monolithic synchronous step down regulator; _ActiveMSOP/TSSOP 8; VDFPN 8 3x3x1.0_25.50.65.50.8Yes0.231400YesYesSelectable low noise/consumption mode1300150010002000-40150
L698436 V 400 mA synchronous step-down switching regulatorActiveTUBE AND TAPE AND REEL; VDFPN 10 3x3x1.0_4.5360.9280.4Yes0.1250YesYesPGOOD, Vbias, Adj. FSW250000600000---40150
L6985F38 V 500 mA synchronous step-down switching regulator with 30 uA quiescent currentActiveHTSSOP16_4380.85380.5Yes0.03250YesYesAdj. FSW; Adj. Voltage Sup.25000020000002500002000000-40150
L698638 V 2 A synchronous step-down switching regulator with 30 uA quiescent currentActiveHTSSOP16_4380.85382Yes0.03250YesYesAdj. FSW; Adj. Voltage Sup.25000020000002500002000000-40150
L6986F38 V 1.5 A synchronous step-down switching regulator with 30 uA quiescent currentActiveHTSSOP16_4380.85381.5Yes0.03250YesYesAdj. FSW; Adj. Voltage Sup.25000020000002500002000000-40150
L79802 A step-down switching regulatorActivePowerSO-8; VDFPN 8 3x3x1.0_4.5280.6282No2.4250YesYesSYNCHRONIZATION, adj Fsw25010002501000--
L79813 A step-down switching regulatorActivePowerSO-8; VDFPN 8 3x3x1.0_4.5280.6283No2.4250YesYesSYNCHRONIZATION, adj Fsw25010002501000--
L79852A step-down switching regulatorActivePowerSO-8; VDFPN 10 3x3x1.0_4.5380.6382No2.4250YesYesSYNCHRONIZATION, adj Fsw25010002501000--
L79863A step-down switching regulatorActivePowerSO-8; VDFPN 10 3x3x1.0_4.5380.6383No2.4250YesYesSYNCHRONIZATION, adj Fsw25010002501000--
L7986TA3A step-down switching regulatorActivePowerSO-8_4.5380.6383No2.4250YesYesSYNCHRONIZATION, adj Fsw25010002501000-40125
L798761 V 3 A asynchronous step-down switching regulator with adjustable current limitationActiveHTSSOP16_4.5610.8613No1250YesYesAdj. current limit25015002501500-40125
L7987L61 V 2 A asynchronous step-down switching regulator with adjustable current limitationActiveHTSSOP16_4.5610.8612No1250YesYesAdj. current limit25015002501500-40125
PM89033 A step-down monolithic switching regulatorActiveVFQFPN 16 3x3x1.0_2.860.63.63Yes51100YesFixed 0.79 ms typInterleaving synchronization; pulse skipping mode80011008001100-25125
PM8903A3 A step-down monolithic switching regulatorActiveVFQFPN 16 3x3x1.0_2.860.63.63Yes51100YesFixed, 0.79 ms typInterleaving synchronization; pulse skipping mode80011008001100-25125
PM89066 A step-down monolithic switching regulatorPreviewVFQFPN 16 3x3x1.0_2.860.63.66Yes101100000YesYesProgrammable switching frequency and soft-start; pulse skipping mode7500002000000---25125
ST1S031.5 A, 1.5 MHz adjustable, step-down switching regulatorActiveVFDFPN 6 3x3_2.7160.851.5No-1500YesYes-------
ST1S06Synchronous rectification with inhibit, 1.5 A, 1.5 MHz adjustable, step-down switching regulator; Synchronous rectification with inhibit, 1.5 A, 1.5 MHz fixed, step-down switching regulator; Synchronous rectification, 1.5 A, 1.5 MHz adjustable, step-down switching regulatorActiveVFDFPN 6 3x3_2.75.50.851.5Yes1.51500YesyesFixed and Adjustable version1200180012001800-40150
ST1S09Synchronous rectification with inhibit, 2 A, 1.5 MHz adjustable, step-down switching regulatorActiveVFDFPN 6 3x3_4.55.50.852Yes2.51500YesYesPower good and Inhibit version1200180012001800-40150
ST1S10Monolithic synchronous step-down regulatorActivePowerSO-8; VFDFPN 8 4x4x1.0_2.7180.8163Yes-900YesYes---4001400--
ST1S12XXSynchronous rectification with inhibit, 0.7 A, 1.7 MHz adjustable, step-down switching regulator; Synchronous rectification with inhibit, 0.7 A, 1.7 MHz fixed, step-down switching regulatorActiveTSOT23-5L_2.55.50.650.7Yes0.61700YesYesFixed and Adjustable version1160200011602000-40150
ST1S14Up to 3 A step down switching regulatorActivePowerSO-8_5.5480.8483No2-YesYesEN2/Pgood------
ST1S15500 mA, 6 MHz synchronous step-down converterActiveFlip-Chip 400u; VFDFPN 6 2x2x1.0_2.35.51.822.80.5Yes0.0456000YesYesMode Pin for PWM5400660054006600-40150
ST1S303 A, 1.5 MHz PWM step-down switching regulator with synchronous rectificationActiveVFDFPN 8 4x4x1.0_2.760.853Yes2.51500YesYes-------
ST1S313 A DC step-down switching regulatorActiveSO-8; VFDFPN 8 3x3x1.0_2.85.50.85.53Yes0.631500YesYesPgood12001900---40150
ST1S324 A DC step-down switching regulatorActiveVFDFPN 8 4x4x1.0_2.85.50.85.54Yes0.631500YesYesPgood12001900---40150
ST1S403A DC step-down switching regulatorActivePowerSO-8; SO-8; VFDFPN 8 4x4x1.0_4180.8183Yes2.5850YesYes-------
ST1S414 A step-down switching regulatorActivePowerSO-8; VFDFPN 8 4x4x1.0_4180.8184Yes1.5850YesYes------40150
ST1S504A Monolithic synchronous step-down converter with high efficiency at light loadActiveVDFPN 10 3x3x1.0_4180.8164Yes0.38500YesYesPGOOD400600---40150
ST2S06Dual synchronous rectification with reset or inhibit, 0.5 A, 1.5 MHz adjustable step-down switching regulatorActiveVFQFPN 12 4x4x1.0_4.55.50.85.50.5Yes1.21500YesYesReset (A version) Inhibit (B version)1200180012001800-40150
ST2S08BDual synchronous rectification, 1.5 A, 1.5 MHz adjustable step-down switching regulatorActiveVFQFPN 12 4x4x1.0_35.50.84.6751.5Yes1.51500YesYesDual Output1200180012001800-40150
ST763AC3.3V STEP DOWN CURRENT MODE PWM DC-DC CONVERTERSActiveSO-8_3.3113.1353.4650.5No0.6200YesNo-159212159212-40150