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MM3474E05VBE
Electronics Part Number
MM3474E05VBE-WXManufacturer
ROHM Semiconductor
MM3474E05VBE
Description
Multi-Cell Battery Protection ICInventory
6 Pcs New Original In Stock
Li-ion/polymer battery protection IC, TSOP-20D; overvoltage/overcurrent; for portable battery packs.
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Minimum 1
Minimum 1
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Technical Specifications
Category
Diodes, Rectifiers, Diode Arrays
Manufacturer
ROHM Semiconductor
Packaging
Cut Tape (CT) & Digi-Reel®
Mounting Type
Surface Mount
Package / Case
TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
Series
-
Base Product Number
RB225
Product Status
Active
Technology
Schottky
Supplier Device Package
LPDS
Voltage - DC Reverse (Vr) (Max)
40 V
Current - Reverse Leakage @ Vr
500 µA @ 40 V
Voltage - Forward (Vf) (Max) @ If
550 mV @ 15 A
Speed
Fast Recovery =< 500ns, > 200mA (Io)
Operating Temperature - Junction
150°C (Max)
Diode Configuration
1 Pair Common Cathode
Current - Average Rectified (Io) (per Diode)
15A
Data Sheet Document (D)
Datasheets
Download RB225NS-40TL Product Specification (PDF)
HTML Datasheet
RB225NS-40TL-DG
Design Resources
TO263SSnDAL1 Inner Structure
Reliability Documents
SBD-SMD Reliability Test
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8541.10.0080
Additional Information
Other Names
RB225NS-40TLCT RB225NS40TL RB225NS-40TLDKR RB225NS-40TLTR
Standard Package
1,000
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Frequently Asked Questions (FAQ)
What are the thermal design considerations when using the RB225NS-40TL in a high-current power suppl
When using the RB225NS-40TL in high-current applications near its 15A average rectified current limit, proper PCB layout for thermal management is critical. The LPDS (D2PAK) package relies heavily on PCB copper for heat dissipation. To avoid exceeding the 150°C max junction temperature, ensure a minimum of 2–3 square inches of 2-oz copper pour connected to the tab, preferably with multiple thermal vias to inner or back-side ground planes. Without adequate thermal design, derating by 20–30% may be necessary even at moderate ambient temperatures above 60°C, especially in enclosed environments.
Can the RB225NS-40TL replace the SB160 in a 28V DC/DC converter, and what design risks should I eval
Yes, the RB225NS-40TL can replace the SB160 in a 28V DC/DC converter, offering a tighter 40V reverse rating and higher 15A current handling versus the SB160's 1A rating. However, verify that your layout can handle the higher fault current in case of overloads, as the RB225NS-40TL is designed for power-level applications. Additionally, ensure that your gate drive and current sensing circuits account for the lower 550 mV forward voltage at 15A to prevent inaccurate current regulation or false undervoltage detection during light loads.
How does the RB225NS-40TL perform in reverse leakage-sensitive circuits, and what alternatives exist
The RB225NS-40TL specifies a maximum reverse leakage of 500 µA at 40V and high temperatures, which may be problematic in low-power or battery-operated systems where leakage dominates standby current. If operating near 125°C junction temperature, actual leakage can approach this limit and affect system efficiency. For such cases, consider the RB160M-40 (also Schottky but rated at 1A with lower absolute leakage) or a synchronized MOSFET topology to eliminate diode leakage entirely. Always derate operating voltage below 40V and manage junction temperature to minimize leakage in critical apps.
What layout best practices minimize parasitic inductance when integrating the RB225NS-40TL in a sync
To reduce parasitic inductance when using the RB225NS-40TL in a synchronous buck converter, keep the input capacitor as close as possible to the VIN and GND pads of the diode and the high-side switch. Use wide, short traces or polygons for the current path, and connect the common cathode node with minimal loop area to the output inductor. Exploit the D2PAK's low-inductance tab-down thermal pad by fully connecting it to the DC output plane with multiple vias. Avoid sharp 90-degree bends and ensure ground return paths are solid to prevent ringing and EMI due to fast recovery transitions.
Is the RB225NS-40TL suitable for automotive 12V systems with load dump transients, and how should I
The RB225NS-40TL’s 40V reverse rating is marginal for automotive 12V systems experiencing load dump transients, which can exceed 40V. While normal operation at ~14.4V is well within range, exposure to ISO 7637-2-defined load dump pulses may damage the diode. Use it only in downstream, regulated sections or pair it with a transient voltage suppression (TVS) diode like SMAJ36A to clamp transients. Alternatively, consider the RB235NS-60TL (60V Schottky) for direct battery connection in automotive applications to provide sufficient voltage headroom and reliability under real-world stress conditions.
What are the thermal design considerations when using the RB225NS-40TL in a high-current power suppl
When using the RB225NS-40TL in high-current applications near its 15A average rectified current limit, proper PCB layout for thermal management is critical. The LPDS (D2PAK) package relies heavily on PCB copper for heat dissipation. To avoid exceeding the 150°C max junction temperature, ensure a minimum of 2–3 square inches of 2-oz copper pour connected to the tab, preferably with multiple thermal vias to inner or back-side ground planes. Without adequate thermal design, derating by 20–30% may be necessary even at moderate ambient temperatures above 60°C, especially in enclosed environments.
Can the RB225NS-40TL replace the SB160 in a 28V DC/DC converter, and what design risks should I eval
Yes, the RB225NS-40TL can replace the SB160 in a 28V DC/DC converter, offering a tighter 40V reverse rating and higher 15A current handling versus the SB160's 1A rating. However, verify that your layout can handle the higher fault current in case of overloads, as the RB225NS-40TL is designed for power-level applications. Additionally, ensure that your gate drive and current sensing circuits account for the lower 550 mV forward voltage at 15A to prevent inaccurate current regulation or false undervoltage detection during light loads.
How does the RB225NS-40TL perform in reverse leakage-sensitive circuits, and what alternatives exist
The RB225NS-40TL specifies a maximum reverse leakage of 500 µA at 40V and high temperatures, which may be problematic in low-power or battery-operated systems where leakage dominates standby current. If operating near 125°C junction temperature, actual leakage can approach this limit and affect system efficiency. For such cases, consider the RB160M-40 (also Schottky but rated at 1A with lower absolute leakage) or a synchronized MOSFET topology to eliminate diode leakage entirely. Always derate operating voltage below 40V and manage junction temperature to minimize leakage in critical apps.
What layout best practices minimize parasitic inductance when integrating the RB225NS-40TL in a sync
To reduce parasitic inductance when using the RB225NS-40TL in a synchronous buck converter, keep the input capacitor as close as possible to the VIN and GND pads of the diode and the high-side switch. Use wide, short traces or polygons for the current path, and connect the common cathode node with minimal loop area to the output inductor. Exploit the D2PAK's low-inductance tab-down thermal pad by fully connecting it to the DC output plane with multiple vias. Avoid sharp 90-degree bends and ensure ground return paths are solid to prevent ringing and EMI due to fast recovery transitions.
Is the RB225NS-40TL suitable for automotive 12V systems with load dump transients, and how should I
The RB225NS-40TL’s 40V reverse rating is marginal for automotive 12V systems experiencing load dump transients, which can exceed 40V. While normal operation at ~14.4V is well within range, exposure to ISO 7637-2-defined load dump pulses may damage the diode. Use it only in downstream, regulated sections or pair it with a transient voltage suppression (TVS) diode like SMAJ36A to clamp transients. Alternatively, consider the RB235NS-60TL (60V Schottky) for direct battery connection in automotive applications to provide sufficient voltage headroom and reliability under real-world stress conditions.
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Sep 15 2026
