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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

Renesas 2SJ297-91L

Name: 2SJ297-91L
Brand: Renesas
SKU: 2SJ297-91L
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SJ297-91L

Manufacturer:: Renesas

Category:: FETs, MOSFETs

Package:: -

Datasheet:: 2SJ297-91L.pdf

Description:: P-CHANNEL POWER MOSFET

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Product details

Overview

2SJ297-91L from Renesas Electronics (formerly Hitachi) is a silicon P-channel MOSFET designed for high-speed power switching in DC-DC converters and switching regulators. It features –60 V V_DSS, –20 A continuous drain current, 0.05 Ω typical R_DS(on) at V_GS = –10 V, avalanche-rated operation, and LDPAK surface-mount package.

For engineers reviewing the 2SJ297-91L datasheet, 2SJ297-91L pinout, 2SJ297-91L application, or 2SJ297-91L equivalent, key selection criteria include gate threshold voltage (–1.0 to –2.25 V), low drive current requirement compatible with 5 V logic, body diode reverse recovery time (160 ns), and avalanche energy rating (34 mJ).

Technical Context

This P-channel enhancement-mode MOSFET operates with negative gate-to-source control, enabling high-side switching without level-shifting circuitry. Its low R_DS(on) and fast switching times (t_d(on) = 25 ns, t_f = 210 ns) reduce conduction and switching losses in synchronous buck topologies.

The integrated body diode supports freewheeling in non-synchronous converters, with specified V_DF = –1.1 V at –20 A and trr = 160 ns under defined di/dt conditions. Avalanche capability (I_AP = –20 A, E_AR = 34 mJ) allows robust operation under inductive load turn-off stress.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	–60 V - maximum blocking voltage before avalanche breakdown
I_D (continuous)	–20 A - max DC current at T_C = 25°C, defines thermal design margin
R_DS(on) (V_GS = –10 V)	0.05 Ω typ - determines I²R conduction loss in high-current paths
V_GS(off)	–1.0 to –2.25 V - gate threshold range enabling reliable turn-on with 5 V logic
t_r/t_f	130/210 ns - rise/fall times at I_D = –10 A, RL = 3 Ω, impacts switching loss
E_AR	34 mJ - single-pulse avalanche energy rating, critical for inductive load reliability
C_iss	2200 pF - input capacitance affecting gate drive power and switching speed

Pinout & Package

Package: LDPAK (4-pin surface-mount, dual-drain configuration). Thermal pad on underside enhances PCB heat dissipation.

Pin/Terminal	Circuit Role	Design Meaning
1	Gate	Control terminal; negative V_GS turns device ON; requires <2.25 V magnitude for full enhancement
2 & 4	Drain	High-side switched node; electrically common; connects to load supply rail
3	Source	Power return path; referenced to system ground in high-side switch configurations

Key Features

Feature	Design Value
Low R_DS(on)	0.05 Ω typ at –10 V gate drive reduces conduction loss in 20 A power stages
4 V gate drive compatibility	Full enhancement achievable with standard 5 V logic, eliminating need for gate boosters
Avalanche-rated	34 mJ single-pulse energy tolerance enables reliable operation during inductive turn-off transients
Fast switching	25 ns turn-on delay and 210 ns fall time support >500 kHz DC-DC converter operation
Integrated body diode	160 ns reverse recovery time and –1.1 V forward drop allow efficient freewheeling without external diode

Applications

DC-DC Buck Converter	High-Side Load Switch
Use Scenario: Synchronous rectification in 12 V input, 3.3 V/15 A output buck regulator. IC Role / Device Role / Timing Role: High-side P-channel MOSFET providing controlled power delivery with minimal gate drive complexity. Use Value: Low R_DS(on) and fast switching reduce total power loss below 1.2 W at full load, improving efficiency by ≥2.5% vs. comparable alternatives.	Use Scenario: Hot-swap control for industrial 24 V bus powering PLC I/O modules. IC Role / Device Role / Timing Role: Inrush-limited high-side switch enabling safe insertion/removal of downstream loads. Use Value: Gate threshold and low drive current allow direct microcontroller GPIO control without level shifters or drivers.
Switching Regulator Secondary Side	Motor Drive Half-Bridge
Use Scenario: Secondary-side synchronous rectifier in isolated flyback converter for telecom power supplies. IC Role / Device Role / Timing Role: P-channel switch replacing Schottky diode to improve conversion efficiency at light-to-moderate loads. Use Value: Avalanche rating ensures survivability during transformer leakage inductance energy release at turn-off.	Use Scenario: Upper-leg switch in 24 V brushed DC motor H-bridge for robotics actuation. IC Role / Device Role / Timing Role: High-side driver controlling motor direction and braking via PWM. Use Value: Dual-drain LDPAK package provides low-inductance layout and enhanced thermal coupling to heatsink plane.

DC-DC Buck Converter

High-Side Load Switch

Use Scenario: Synchronous rectification in 12 V input, 3.3 V/15 A output buck regulator.

IC Role / Device Role / Timing Role: High-side P-channel MOSFET providing controlled power delivery with minimal gate drive complexity.

Use Value: Low R_DS(on) and fast switching reduce total power loss below 1.2 W at full load, improving efficiency by ≥2.5% vs. comparable alternatives.

Use Scenario: Hot-swap control for industrial 24 V bus powering PLC I/O modules.

IC Role / Device Role / Timing Role: Inrush-limited high-side switch enabling safe insertion/removal of downstream loads.

Use Value: Gate threshold and low drive current allow direct microcontroller GPIO control without level shifters or drivers.

Switching Regulator Secondary Side

Motor Drive Half-Bridge

Use Scenario: Secondary-side synchronous rectifier in isolated flyback converter for telecom power supplies.

IC Role / Device Role / Timing Role: P-channel switch replacing Schottky diode to improve conversion efficiency at light-to-moderate loads.

Use Value: Avalanche rating ensures survivability during transformer leakage inductance energy release at turn-off.

Use Scenario: Upper-leg switch in 24 V brushed DC motor H-bridge for robotics actuation.

IC Role / Device Role / Timing Role: High-side driver controlling motor direction and braking via PWM.

Use Value: Dual-drain LDPAK package provides low-inductance layout and enhanced thermal coupling to heatsink plane.

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRF9540NPbF	R_DS(on) = 0.20 Ω (higher), V_DSS = –100 V, TO-220 package	Higher voltage rating but higher conduction loss; unsuitable for space-constrained layouts	Prefer when higher blocking voltage is required and thermal mass permits TO-220 mounting
Si2305DS	R_DS(on) = 0.045 Ω (lower), V_DSS = –30 V, SOT-23 package	Lower voltage rating and 3.5 A current limit; limited to sub-5 A applications	Prefer for compact, low-power designs where 30 V rating suffices and board area is critical

Compared with IRF9540NPbF and Si2305DS, the 2SJ297-91L uniquely balances –60 V rating, –20 A current handling, 0.05 Ω R_DS(on), and surface-mount LDPAK packaging-making it optimal for medium-power, high-density DC-DC converters requiring avalanche ruggedness.

Availability

2SJ297-91L is available at Aetrix Electronics and suitable for DC-DC converters, switching regulators, and high-side load switches requiring stable component supply and long-term industrial availability.

Supply support for 2SJ297-91L includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT applications.

The 2SJ297-91L belongs to Hitachi's legacy discrete power MOSFET family, engineered specifically for high-efficiency, high-reliability power conversion in industrial and telecom infrastructure equipment.

FAQ

What is the gate threshold voltage range for the 2SJ297-91L?

The 2SJ297-91L has a gate-to-source cutoff voltage (V_GS(off)) ranging from –1.0 V to –2.25 V at I_D = –1 mA and V_DS = –10 V. This ensures reliable turn-on with standard 5 V logic-level signals while maintaining adequate noise margin against false triggering in noisy environments. The 2SJ297-91L's low threshold supports simple gate drive design without level-shifting circuitry.

Can the 2SJ297-91L be used in synchronous rectification applications?

Yes, the 2SJ297-91L is suitable for synchronous rectification due to its low R_DS(on) (0.05 Ω typ), fast switching (t_f = 210 ns), and integrated body diode with 160 ns reverse recovery time. Its P-channel architecture simplifies gate drive in secondary-side configurations. The 2SJ297-91L delivers measurable efficiency gains over Schottky diodes in 12–24 V output DC-DC converters operating up to 500 kHz.

What is the maximum avalanche energy rating for the 2SJ297-91L?

The 2SJ297-91L is rated for 34 mJ of single-pulse avalanche energy (E_AR) at T_ch = 25°C with R_g ≥ 50 Ω. This specification validates its ability to absorb inductive energy during unclamped inductive switching events-critical for reliability in switching regulators and motor drive circuits. The 2SJ297-91L's avalanche capability is confirmed per test condition notes in the original Hitachi datasheet.

Does the 2SJ297-91L have a thermally enhanced package?

Yes, the 2SJ297-91L uses the LDPAK package, which features an exposed thermal pad on the underside for direct PCB copper connection. This design significantly improves thermal resistance from junction-to-board, supporting higher continuous current operation in compact layouts. The 2SJ297-91L's LDPAK footprint enables better thermal performance than comparable SO-8 or DPAK packages at equivalent power levels.

Is the 2SJ297-91L RoHS compliant and halogen-free?

The 2SJ297-91L was originally released in November 1996 and predates mandatory RoHS requirements. While Renesas does not publish formal RoHS/halogen status for this legacy part, the 2SJ297-91L is manufactured using lead-based terminations and may contain restricted substances. For new designs, consult Renesas' official product change notices or contact Aetrix Electronics for compliance documentation specific to current production lots of the 2SJ297-91L.

2SJ297-91L Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Obsolete

FET Type:: -

Technology:: -

Drain to Source Voltage (Vdss):: -

Current - Continuous Drain (Id) @ 25°C:: -

Drive Voltage (Max Rds On, Min Rds On):: -

Rds On (Max) @ Id, Vgs:: -

Vgs(th) (Max) @ Id:: -

Gate Charge (Qg) (Max) @ Vgs:: -

Vgs (Max):: -

Input Capacitance (Ciss) (Max) @ Vds:: -

FET Feature:: -

Power Dissipation (Max):: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

2SJ297-91L FAQ

1.How can I place an order for 2SJ297-91L through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SJ297-91L on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 2SJ297-91L reliable?

The price and inventory of 2SJ297-91L are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SJ297-91L is usually 5 days.

3.What payment methods are accepted for 2SJ297-91L?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SJ297-91L transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SJ297-91L?

2SJ297-91L orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SJ297-91L order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 2SJ297-91L?

For technical support, including 2SJ297-91L datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SJ297-91L requirements.

6.How does Aetrix verify that 2SJ297-91L is sourced from the original manufacturer or authorized distributors?

All 2SJ297-91L products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 2SJ297-91L meets industry standards.

7.What is the process for return or replacement of 2SJ297-91L?

All 2SJ297-91L units undergo pre-shipment inspection (PSI). If there is an issue with 2SJ297-91L, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 2SJ297-91L part is unused and in its original packaging.

Return procedure for 2SJ297-91L:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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