BD9846FV-E2 Equivalent & Substitute Parts

Part Overview

The BD9846FV-E2 is a Buck Regulator Positive Output Step-Down DC-DC Controller IC manufactured by Rohm Semiconductor in a 20-SSOP-B package. This device functions as a transistor driver for step-down topology applications with dual outputs and single-phase operation. The part is classified as Not For New Designs, making identification of equivalent and substitute components essential for ongoing production support, maintenance applications, and design transitions.

Substiute Parts

BD9846FV-E2

Rohm SemiconductorIn Stock: 5204BD9846FV-E2 Datasheet

Current PartRFQ

BD9848FV-E2

Rohm SemiconductorIn Stock: 2662BD9848FV-E2 Datasheet

Parametric EquivalentRFQ

NCP5425DBR2G

onsemiIn Stock: 27945NCP5425DBR2G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BD9846FV-E2 are identified based on strict parametric alignment within the Power Management (PMIC) category. The substitution logic is based on the following critical parameters:

Primary Equivalence Criteria:

• Function: Step-Down DC-DC Controller
• Output Type: Transistor Driver
• Topology: Buck
• Number of Outputs: 2
• Output Phases: 1
• Package Type: 20-pin SSOP/TSSOP variants
• Mounting Type: Surface Mount
• RoHS Compliance: ROHS3 Compliant

Voltage and Frequency Operating Ranges:

• Supply Voltage: Minimum 3.6V, Maximum 35V
• Switching Frequency: 100kHz to 1.5MHz operational capability

Substitute Classification:

1. Parametric Equivalent (BD9848FV-E2): Identical manufacturer (Rohm Semiconductor), matching all core electrical parameters, package dimensions, and control features. Product Status is Active, providing design continuity.

2. Similar Substitute (NCP5425DBR2G): onsemi manufacturer alternative with matching buck topology, dual outputs, and surface-mount 20-pin package. Operates within compatible voltage and frequency ranges with extended availability.

Parameter Comparison

Engineering Selection Recommendations

BD9848FV-E2 (Parametric Equivalent): This part is the primary equivalent for BD9846FV-E2 applications. Both devices share identical electrical specifications, control feature sets, and package dimensions. The BD9848FV-E2 carries Active product status and maintains full ROHS3 compliance and REACH unaffected certification. Selection of BD9848FV-E2 is appropriate for direct replacement in existing designs and production continuity.

NCP5425DBR2G (Similar Substitute): This onsemi alternative operates as a buck regulator controller with matching dual-output, surface-mount configuration. The NCP5425DBR2G functions within a narrower supply voltage range (4V ~ 16V) and switching frequency band (150kHz ~ 750kHz) compared to the BD9846FV-E2. The device includes integrated synchronous rectification and operates across an extended temperature range (0°C ~ 125°C). Selection requires verification that application voltage and frequency requirements fall within the NCP5425DBR2G operating envelope. Both parts maintain ROHS3 compliance and Active product status.

Frequently Asked Questions (FAQ)

Q: Can BD9848FV-E2 be used as a direct replacement for BD9846FV-E2?

A: Yes. The BD9848FV-E2 is a parametric equivalent with identical electrical specifications, control features, package dimensions, and thermal operating range. Both parts are 20-LSSOP surface-mount devices with matching supply voltage (3.6V ~ 35V), switching frequency (100kHz ~ 1.5MHz), and control feature sets. The primary difference is product status: BD9848FV-E2 is Active, while BD9846FV-E2 is Not For New Designs.

Q: What are the key differences between BD9846FV-E2 and NCP5425DBR2G?

A: Both are buck regulator controllers with dual outputs in 20-pin surface-mount packages. Key differences include: (1) Supply voltage range—BD9846FV-E2 operates 3.6V ~ 35V, NCP5425DBR2G operates 4V ~ 16V; (2) Switching frequency—BD9846FV-E2 supports 100kHz ~ 1.5MHz, NCP5425DBR2G supports 150kHz ~ 750kHz; (3) Output phases—BD9846FV-E2 is single-phase, NCP5425DBR2G is dual-phase; (4) Synchronous rectification—NCP5425DBR2G includes integrated synchronous rectifier, BD9846FV-E2 does not; (5) Control features—BD9846FV-E2 includes dead time control and soft start, NCP5425DBR2G provides frequency control only.

Q: Is NCP5425DBR2G suitable for all BD9846FV-E2 applications?

A: NCP5425DBR2G substitution requires application-specific verification. The narrower supply voltage range (4V ~ 16V versus 3.6V ~ 35V) and switching frequency band (150kHz ~ 750kHz versus 100kHz ~ 1.5MHz) must be confirmed compatible with the target application. Applications requiring supply voltages below 4V or above 16V, or switching frequencies outside the 150kHz ~ 750kHz range, cannot use NCP5425DBR2G.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. BD9848FV-E2 and NCP5425DBR2G are both ROHS3 Compliant and REACH Unaffected, matching the compliance status of BD9846FV-E2.

Q: What is the package difference between 20-LSSOP and 20-TSSOP?

A: Both are 20-pin surface-mount packages with 0.173" width and 4.40mm body width. LSSOP denotes Leaded Small Shrink Outline Package, while TSSOP denotes Thin Shrink Outline Package. Both packages are mechanically compatible with standard PCB footprints designed for 20-pin SSOP variants, though minor dimensional variations may exist. PCB layout verification is recommended when transitioning between package types.