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- Cutting-Edge Web Simulation Tool “ROHM Solution Simulator” Capable of Complete Circuit Verification of Power Devices and Driver ICs
User's Guide
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Reference Design
- Reference Circuit
BD70522GUL
BD70522GUL
Nano Energy™, Abwärtswandler mit extrem niedrigem Iq für Anwendungen mit geringer Leistungsaufnahme.
Der BD70522GUL ist ein Abwärtswandler mit 180nA Ruhestrom und unterstützt Ausgangsströme bis zu 500mA. Die Constant ON-Time (COT-) Steuerung mit ULP- (Ultra Low Power)Modus bietet ein hervorragendes Einschwingverhalten und verlängert die Batterielebensdauer durch einen ausgezeichneten Leichtlast-Wirkungsgrad unterhalb des 10μA Lastbereichs. Die Ausgangsspannung kann über VSEL-Pins aus 9 voreingestellten Spannungen ausgewählt werden. Wenn die Eingangsspannung sich der Ausgangsspannung annähert, geht der IC in den 100%ON-Modus über, in dem der Schaltbetrieb beendet wird.
Data Sheet
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Produktdetails
Spezifikationen:
Grade
Standard
ch
1
Integrated FET / Controller
Integrated FET
Topology
Buck
Synchronous / Nonsynchronous
Synchronous
Vin1(Min.)[V]
2.5
Vin1(Max.)[V]
5.5
Vout1(Min.)[V]
1.2
Vout1(Max.)[V]
3.3
Iout1(Max.)[A]
0.5
SW frequency(Max.)[MHz]
1.0
Light Load mode
No
EN
Yes
PGOOD
Yes
Operating Temperature (Min.)[°C]
-40
Operating Temperature (Max.)[°C]
85
Eigenschaften:
- Nano Energy™
- 180nA (Typ) Quiescent Current
- Up to 90% Efficiency at 10μA Output Current
- Up to 500mA Output Current
- 9 Selectable Output Voltages (1.2V, 1.5V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.2V, 3.3V)
- Power Good Output
- 100%ON Mode for Low Input Voltage
- Discharge Function on VOUT.
Evaluation
Board
-
- Evaluation Board
- BD70522GUL-EVK-101
The BD70522GUL converter is a power supply solution designed for battery powered devices. 180nAquiescent current and ULP (Ultra Low Power) mode enable excellent light load efficiency at 10µA load, extending battery life, while output currents up to 500mAare supported. Users can select from among 9 preset output voltages via the VSEL pin. And when the input voltage gets close to the output voltage, the IC enters 100% ON mode that stops switching operation.
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White Paper
- Cutting-Edge Web Simulation Tool “ROHM Solution Simulator” Capable of Complete Circuit Verification of Power Devices and Driver ICs
User's Guide
- Evaluation Board User's Guide
Reference Design
- Reference Circuit
Technische Artikel
Schematic Design & Verification
- Buck DC/DC Converter Recommended Inductor List
- Calculation of Power Dissipation in Switching Circuit
- Considering Input Filter to Reduce Conducted Emissions by DCDC Converter
- Considering Polarity of Power Inductor to Reduce Radiated Emission of DC-DC converter
- Method for Monitoring Switching Waveform
- PCB Layout Techniques of Buck Converter
- Phase Compensation Design for Current Mode Buck Converter
- Bootstrap Circuit in the Buck Converter
- Method for Determining Constants of
- Power Supply Sequence Circuit with General Purpose Power Supply IC
- Suppression Method of Switching Noise Using Linear Regulator and Low Pass Filter
- Measurement Method for Phase Margin with Frequency Response Analyzer (FRA)
- Usage of SPICE Macromodel for DC/DC
- Snubber Circuit for Buck Converter IC
- Efficiency of Buck Converter
- Calculation of Power Loss (Synchronous)
- Inductor Calculation for Buck converter IC
- Considerations for Power Inductors Used for Buck Converters
- Capacitor Calculation for Buck converter IC
- The Important Points of Multi-layer Ceramic Capacitor Used in Buck Converter circuit
- Resistor Value Table to set Output Voltage of Buck Converter IC
- Importance of Probe Calibration When Measuring Power: Deskew
- Impedance Characteristics of Bypass Capacitor
Thermal Design
- Notes for Temperature Measurement Using Thermocouples
- Two-Resistor Model for Thermal Simulation
- Notes for Temperature Measurement Using Forward Voltage of PN Junction
- Thermal Resistance
- Precautions When Measuring the Rear of the Package with a Thermocouple
Packaging & Qualität
Manufacturing Data
- Factory Information
Environmental Data
- REACH SVHC Non-use Declaration