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5.5-28V 2ch Synchronous Buck converter(controller) with Built-in Linear Regulator - BD9528AMUV

This IC is a switching regulator controller with high output current which can achieve low output voltage (1.0V to 5.5V) from a wide input voltage range (5.5V to 28V). High efficiency for the switching regulator can be realized by utilizing an external N-MOSFET power transistor. A new technology called H3RegTM is a Rohm proprietary control method to realize ultra high transient response against load change. SLLMTM (Simple Light Load Mode) technology is also integrated to improve efficiency in light load mode, providing high efficiency over a wide load range. For protection and ease of use, the soft start function, variable frequency function, short circuit protection function with timer latch, and REF synchronous function are all built in. This switching regulator is specially designed for Note PC.

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* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Status
Package
Unit Quantity
Minimum Package Quantity
Packing Type
RoHS
BD9528AMUV-E2 Active VQFN032V5050 2500 2500 Taping Yes
 
Specifications:
Grade Standard
ch 2
Integrated FET / Controller Controller
Buck / Boost / Buck-Boost / Inverting Buck
Synchronous / Nonsynchronous Synchronous
Vin1(Min.)[V] 5.5
Vin1(Max.)[V] 28.0
Vout1(Min.)[V] 1.0
Vout1(Max.)[V] 5.5
Vin2(Min.)[V] 5.5
Vin2(Max.)[V] 28.0
Vout2(Min.)[V] 1.0
Vout2(Max.)[V] 5.5
SW frequency(Max.)[MHz] 0.5
Light Load mode Yes
EN Yes
PGOOD Yes
Operating Temperature (Min.)[°C] -20
Operating Temperature (Max.)[°C] 100
Features:
  • ・2ch H3REGTM Switching Regulator Controller
    ・Adjustable Simple Light Load Mode (SLLM), Quiet Light Load Mode (QLLM) and Forced continuous Mode
    ・Thermal Shut Down (TSD), Under Voltage LockOut (UVLO), Over Current Protection (OCP),
        Over Voltage Protection (OVP), Short circuit protection with 0.75ms timer-latch (SCP)
    ・Soft start function to minimize rush current during startup
    ・Switching Frequency Variable (f=150kHz~500kHz)
    ・Built-in Power good circuit
    ・Built-in 2ch Linear regulator (5V/3.3V ,Total 100mA)
    ・Built in reference voltage(0.7V)
    ・Built-in BOOT-Di
    ・Built-in output discharge
 
 
Technical Data
Application Note

Capacitor Calculation for Buck converter IC

Application Note

Inductor Calculation for Buck converter IC

Application Note

Resistor Value Table to set Output Voltage of Buck Converter IC

Application Note

Thermal Resistance

Application Note

PCB Layout Techniques of Buck Converter

Application Note

BD9528AMUV PCB Layout that Uses Only 1ch

Application Note

The Important Points of Multi-layer Ceramic Capacitor Used in Buck Converter circuit

Application Note

Calculation of Power Loss (Synchronous)

Application Note

Considerations for Power Inductors Used for Buck Converters

Application Note

Snubber Circuit for Buck Converter IC