DC/DC Converters Selection Guide - Rohm

1 Converters Selection GuideRev. Converters Selection of ContentsROHM WebsiteForROHM spowersupplyIClineup, ,applicationnotes, ,besuretocheckitssettingvalues, ConvertersNew ProductsUltra Low Power Switching RegulatorLineup2 High Step-down Ratio Switching Regulator3 Ultra Small Low Ringing Switching Regulator5 Low Power Consumption Low Input Voltage Operation Switching Regulator7 Featured ProductsBD9x Family Lineup8 Buck , 5V Input9 Buck Converter12V Input11 Buck Converter24V Input13 Buck ConverterSupporting Maximum 76 V Input16 Buck Controller Supporting Maximum 56 V Input17 IsolatedFlybackConverter1921 Selection Guide27DC/DC Converters Selection F22 to to Low Power Switching RegulatorNew ProductsBuck converter (Integrated Switch FET)Product example: BD70522 GULBD70522 GUL Application Circuit Input voltage range : to Output voltage range: to Output voltage precision : Output current : 500mA Current consumption during operation : 180nA Standby current: 50nA Efficiency at output current 10 A.

2 >90% Output voltage setting by pin , , , , , , , , Power good output 100% duty operation Output discharge function Various protection functionsOver current protection (OCP), thermal shutdown (TSD),undervoltagelockout (UVLO)TheBD70522 GULfeaturestheultralowpowertechnology NanoEnergy , , = Current (mA)Efficiency (%)Current productBD70522 GULE fficiency vs. Load CurrentSmall CSP typ maxPCB7mm 11mmDC/DC Converters Selection Step-down Ratio Switching Regulator Supporting Maximum 60V InputPower Supply Solution for Industrial EquipmentTheBD9V101 MUF-LBfeaturestheultrahigh-speedpulsecon troltechnology NanoPulseControl ,enablingthehigheststep-downratioof24 , , example: BD9V101 MUF-LBBD9V101 MUF-LB Application CircuitCPU Unit48 to 60 VBD9V101 MUF-LBIsolatedAC/DCAC 85V to , 1A Long-term supply indispensable for industrial equipment is assured.

3 Direct conversion from a high to low voltage can be performed at a high step-down ratio. Minimum switching ON time: 9ns typ, 20ns max Input voltage range : 16V to 60V (70V rating) Output voltage range : V to V Reference-voltage : Output current : A High-speed transient response characteristics are delivered by controlling the current mode. Because of synchronous rectification, an external diode is unnecessary. Soft start to prevent rush current at power ON Power good output Various protection functionsOver current protection (OCP), short-circuit protection (SCP),thermal shutdown (TSD), undervoltagelockout (UVLO),over voltage protection (OVP), over voltage lockout (OVLO),CPU Unit48 to 60 VDC/DCIsolatedAC/DCAC 85V to , 1 ADC/DC12 VCurrent productNewVINENPGOODVREGVMONSWBSTBD9V101 MUF-LBPGNDPVINFBCOMPRTGNDNew ProductsBuck converter (Integrated Switch FET)

4 DC/DC Converters Selection Pulse Control , the Ultra High-speed Pulse Control , ,thehighstep-downratioof24 ,sincetheswitchingperiodis500nsattheswit chingfrequencyof2 MHz,thestep-downratioof24 , ,whenthepulsewidthisnarrow, utilizesROHM of Nano PulseVIN20V/divVOUT1V/divVIN=48V, VOUT=1V, fSW= mm 20 mm = 360 mm2BD9V101 MUF-LB PCBC urrent PCB47mm 25mm = 1175mm2-69%Byincreasingtheswitchingfrequ encyto2 MHz,thesizeofexternalcomponents(coils)is reduced, , ,increasingtheswitchingfrequencyto2 MHzhasnoeffectontheAMradio(MW) GoodExternallySynchronizableAdjustable SoftStartSynchronousRectifierLight-LoadE fficiencyOver-CurrentProtectionThermalPr otectionOver-VoltageProtectionBD9V101 MUF-LB70116 -- -RecoveryRecovery Tj-40 +150 VQFN24FV4040 OperatingTemperature( C)PackageControlModeFeaturesSwitchingFre quency(MHz)Part (V)OutputCurrent(A)InputVoltageRange(V)O utput Voltage(V) DC/DC Converters Selection Small Low Ringing Switching Regulator17 mm 20 mm = 340 mm212 mm 15 mm = 180 mm222 mm 25mm = 550 mm2-38%-47%UMMP008Z2020 HTSOP-J8 mm mm = mm mm = mm2-86%Space savingOutput 3 ALarge current per areaProduct example.

5 BD9D322 QWZBD9D322 QWZ Application Circuit Input voltage range : V to 18 V Output voltage range: V to V Reference-voltage: V % Output current : 3 A Switching frequency: 700kHz Integrated switch FET: 80m , 50m Current consumption : High speed transient response characteristicswith constant-on-time control Light-load high-efficiency mode Adjustable soft start Various protection functionsOver current protection (OCP),thermal shutdown (TSD),undervoltagelockout (UVLO) Current (A)Efficiency [%]Efficiency vs. Load CurrentConditionsVIN = 12 VVOUT= ,BD9B304 QWZ,BD9D322 QWZ,andBD9D323 QWZadoptultrasmallpackages, , ProductsBuck converter (Integrated Switch FET)Ultra Small PackageDC/DC Converters Selection Ringing, Low EMI2V/div10ns/divCurrent productBD9D322 QWZS witching WaveformEMI WaveformPower GoodAdjustable (VIN )1 Current-- RecoveryRecovery-40 +85 UMMP008AZ020( (VIN )1 / 2On-time-- DeepRecoveryRecovery-40 +85 UMMP008AZ020( (VIN ) (VIN ) RecoveryRecovery-40 +85 UMMP008Z2020( (VIN ) (VIN ) -RecoveryRecovery-40 +85 UMMP008Z2020( Package(W D H mm)SwitchingFrequency(MHz)ControlModeFea turesOperatingTemperature( C)))))

6 5V12 VPart (V)OutputCurrent(A)InputVoltageRange(V)O utput Voltage(V)Input PowerRail VoltageDC/DC Converters Selection (%)Load Current (mA)Low Power Consumption Low Input Voltage Operation Switching RegulatorNew ProductsProduct example: BU33UV7 NUXBU33UV7 NUX Application Circuit Input voltage range: V to V Output voltage: (+ ) Startup voltage: V Output current: 500mA (VIN> , High Power Mode): 50mA (VIN> , Low Power Mode) Supply current: 13 A (High Power Mode): 7 A (Low Power Mode) Power down current: A Switching frequency: 800kHz Integrated function to disconnect between the input and output when ENABLE is OFF or UVLO is activated In the High Power mode, automatic switching between PFM/PWM operations according to the load current In the Low Power mode, saving the supply current with PFM constant operation Pass through operation when VIN> VOUT Output discharge function Integrated voltage detector circuit to prevent cell leakage(detection voltage at assuming two dry cells) Various protection functionsUndervoltagelockout (UVLO), over voltage protection (OVP),over current protection (OCP), short-circuit protection (SCP), thermal shutdown (TSD)

7 ,TheBU33UV7 NUXisaboostDC/DCconverter, , ,sincethecurrentconsumptionisdesignedtob elowwiththesupplycurrentbeing13 A, HVINMODEINTLDO1 FVININTLDOAGNDRSTBVOUTSWPGNDFBMODEBU33UV 7 NUXENC onditionsVIN = vs. Load CurrentBU33UV7 NUXLow Power ModeBU33UV7 NUXHigh Power ModeCurrent productSmall mm mm mmtyptypmaxConditions:Battery capacity 2 AhVIN= 50 AICB attery life (days)BU33UV7 NUXLow Power Mode712BU33UV7 NUXHigh Power Mode657 Current product537 Battery Life Comparison+120+175 PCB15 mm 18 mmNew ProductsBoost converter (Integrated Switch FET) DC/DC Converters Selection ,thenumericvalue 9 following BD representsthe buck topology, Family LineupBD9A300 Topology9 : Buck8 : Boost, Buck-Boost,InvertingOutput Current1 : 1A 2 : 2A3 : 3A4 : 4A A 10A Z : ControllerSerial , 01, 02, Maximum Rated Input Voltage and Control ModeA.

8 7V Current ModeB : 7V On-timeC : 20V Current ModeD : 20V On-timeE : 40V Current ModeF : 40V On-timeG, V : 80V Current ModePart No. DescriptionNote: There are some part numbers that do not conform with this rule 60 Input Power Rail Voltage (V) Current (A)BD9 AxxxBD9 BxxxSeriesBD9 CxxxSeriesBD9 ExxxSeriesBD9 GxxxSeriesBD9 GxxxSeriesBD9 VxxxSeriesBD9 DxxxSeriesFeatured ProductsBuck converter (Integrated Switch FET) DC/DC Converters Selection InputPower Supply Solution for Consumer EquipmentBD9A100 MUVNAND Flash MemoryController-DDR controller-NAND Flash controller-I/F-I/O5V or MemoryPC/Tablet boardEnableProduct example: BD9B300 MUVBD9B300 MUV Application Circuit Input voltage range to Output voltage range (VIN )V Reference-voltage Output current 3A Switching frequency 1 MHz / 2 MHz Integrated switch FET 35m Current consumption 35 A High speed transient response characteristics with constant-on-time control Light-load high-efficiency mode Selectable between light-load automatic switching mode and PWM constant mode Adjustable soft start Power good output Various protection functionsOver current protection (OCP), short-circuit protection (SCP), thermal shutdown (TSD), undervoltagelockout (UVLO)Efficiency vs.

9 Load CI ENCY (%)LOAD CURRENT (A)ConditionsVIN = = 1 MHzBD9B300 MUV light-load automatic switching modeBD9A300 MUV light-load automatic switching modeBD9A300 MUV PWM constant modeBD9B300 MUV PCB15mm , , , , , 3 AENPVINBOOTFREQBD9B300 MUVPGDSWFBVINVOUTAVINSSPGDMODEAGNDPGNDE nable10 FCSSR2R1 CBOOT22 F HPVINAVINENAGNDPGNDSSMODEFREQPGDBOOTSWFB BD9B300 MUVE xample: StorageThe BD9A100 MUV, BD9A300 MUV, BD9A600 MUV and BD9B300 MUV generate a low voltage of about V from power supplies of 5V or ProductsBuck converter (Integrated Switch FET) DC/DC Converters Selection from Two Series Depending on the SystemProduct nameControl modeLight-load operationFunctional differenceBD9 BxxxMUVC onstant-on-timeDeep Light-loadMode Constant-on-time control helps implement transient response faster than that of the BD9 AxxxMUV.

10 Phase compensation is unnecessary. Efficiency across the entire load range is further improved over the BD9 AxxxMUV. The product operates in the light-load automatic switching mode by setting the MODE pin to Low and in the PWM constant mode by setting it to High. The product operates at 2 MHz by setting the FREQ pin to Low and at 1 MHz by setting it to small 1 Hcoil can be used at 2 modeLight-load Mode The product operates in the PWM constant mode by setting the MODE pin to Low and in the light-load automatic switching mode by setting it to High.(This is the same function as the BD9 Bxxx Series, but the logic is reversed.)High performanceUpperCompatibleThe BD9 AxxxMUV Series and BD9 BxxxMUV Series consist of pin-compatible ICs of 1A to 6A.