VNL5050S5-E - 19A Low-Side OMNIFET III Driver | STMicroelectronics
部品番号: VNL5050S5-E ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.62 | $16.20 |
| 100 | $1.34 | $134.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.86 | $860.00 |
VNL5050S5-E 概要
A low-side power switch (also called a low-side driver or low-side MOSFET switch) is a discrete-or-circuit building block that sits between the load and ground. By switching the ground return path, it controls current flow through loads whose high side is tied to the battery. Compared with high-side switches, low-side drivers are simpler, lower on-resistance, and cheaper, at the cost of breaking the load's ground reference. The VNL5050S5-E sits in the broader hierarchy: power switch -> load driver -> power management IC -> semiconductor.
Key features include ESD protection, integrated overvoltage clamp, thermal shutdown, current and power limitation, very low standby current, and very low electromagnetic susceptibility. Together these protections eliminate the need for external freewheeling diodes on inductive loads and remove most external snubber components, reducing BOM cost and PCB area. The OMNIFET III family is qualified for automotive AEC-Q100 environments, making this part usable in body electronics, junction boxes, and ECU driver stages.
The architecture uses a vertical DMOS output stage co-packaged with CMOS logic and analog protection blocks on a single die. The protection chain monitors junction temperature, drain current, and VDS, and latches or cycles the output as needed. Logic inputs are TTL/CMOS compatible and include internal pull-down to keep the output off during MCU reset or floating conditions, simplifying firmware bring-up.
Typical applications include automotive body controllers, relay replacement, solenoid and valve drivers, LED string grounding, and small DC motor drivers. The integrated protections make it suitable for harsh environments where discrete MOSFETs would require extensive external circuitry. With the 8-SOIC footprint, the part can be placed on the same pads as many legacy bipolar Darlington switches.
When designing with the VNL5050S5-E, ensure the load is truly referenced to battery+ and that ground-referenced sensors downstream are not affected. For inductive loads above 1 mH, verify the internal avalanche clamp energy rating is within SOA using E = 0.5 * L * I^2, and consider an external TVS if load energy exceeds the internal clamp rating.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
ドロップイン代替品: VNL5050S5-E — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
VNL5050S5TR-E
✅ ドロップイン📋 参考代替品（カタログ未掲載）
VNL5160S5-E
✅ ドロップイン📋 参考代替品（カタログ未掲載）
VNL5050S5-E 最大定格＆電気的特性
| Product Type | Low-side power switch (OMNIFET III) |
| Technology | VIPower (N-channel vertical MOSFET) |
| Switch Configuration | 1:1 N-Channel, Low Side |
| Continuous Drain Current | 19 A |
| On-State Resistance (Rds(on)) | 50 mOhm (typical) |
| Load Voltage (VLoad Max) | 36 V (max) |
| Logic Supply Voltage (Vcc) | 3.5 V to 5.5 V |
| Logic Input Type | TTL/CMOS compatible, on/off |
| パッケージ | 8-SOIC (0.154 inch / 3.90 mm width) |
| 実装タイプ | Surface Mount |
| ESD Protection | Yes (integrated) |
| Overvoltage Clamp | Yes (integrated avalanche) |
| 熱シャットダウン | Yes (integrated) |
| Current Limitation | Yes (integrated) |
| Power Limitation | Yes (integrated) |
| Standby Current | Very low (per datasheet) |
| Automotive Grade | AEC-Q100 qualified |
VNL5050S5-E ピン構成
| ピン 1 | OUT / DRAIN — Power MOSFET drain (load connection) |
| ピン 2 | OUT / DRAIN — Power MOSFET drain (load connection) |
| ピン 3 | OUT / DRAIN — Power MOSFET drain (load connection) |
| ピン 4 | GND — Ground return |
| ピン 5 | IN — Logic input (TTL/CMOS) |
| ピン 6 | VCC — Logic supply (3.5 V to 5.5 V) |
| ピン 7 | OUT / DRAIN — Power MOSFET drain (load connection) |
| ピン 8 | OUT / DRAIN — Power MOSFET drain (load connection) |
主な用途
VNL5050S5-E の用途: 6 件s: Automotive Relay Replacement, Solenoid and Valve Driver, LED String Low-Side Driver, Small DC Motor Driver, Body Electronics ECU, Battery Management Load Switching.
Automotive Relay Replacement
The VNL5050S5-E directly replaces electromechanical relays driving resistive or inductive loads with one terminal tied to battery+. Its 19 A continuous drain current covers most 12 V automotive relay coils and small motor loads, while the 50 mOhm Rds(on) keeps conduction loss manageable. The integrated avalanche clamp absorbs the coil's turn-off energy (E = 0.5 * L * I^2) without an external freewheeling diode, reducing BOM cost. AEC-Q100 qualification makes it acceptable for underhood and body controller modules. Drive the input from any 3.3 V or 5 V MCU GPIO.
おすすめ
Solenoid and Valve Driver
The VNL5050S5-E is a strong fit for driving 12 V or 24 V solenoid valves, hydraulic proportional valves, and pneumatic actuators in industrial and automotive systems. The low-side topology sinks current to ground, which works whenever the solenoid's high side is tied to battery+. Integrated current limitation protects the windings from short-circuit faults, while thermal shutdown protects the silicon if the solenoid stalls. Designers can parallel two VNL5050S5-E parts for higher-current proportional valves if PCB thermal allows.
おすすめ
LED String Low-Side Driver
The VNL5050S5-E can sink current from LED strings whose anodes are tied to a constant-current or constant-voltage source, providing on/off and PWM dimming control. With 50 mOhm Rds(on) and 19 A capability, it handles multi-amp LED arrays used in automotive tail lamps, daytime running lights, and signaling modules. PWM dimming up to a few hundred hertz is supported directly via the logic input, and the integrated protections guard against LED short-to-ground faults. Pair with a constant-current source upstream for best luminous accuracy.
おすすめ
Small DC Motor Driver
The VNL5050S5-E drives small brushed DC motors in body electronics - window lifters, mirror adjusters, seat positioners, and washer pumps - by switching the motor's ground return. Up to 19 A covers most sub-100 W motor loads. For direction reversal, place two VNL5050S5-E parts in an H-bridge configuration, or use a single part with a relay for the high-side. The integrated back-EMF clamp handles motor inductive kickback during PWM commutation. Add a small RC snubber if PWM edges exceed 1 kV/us and EMI is a concern.
おすすめ
Body Electronics ECU
Central body controllers use the VNL5050S5-E as a generic low-side output stage for miscellaneous loads: horns, washers, mirror heaters, and interior lamps. Its 3.5 V to 5.5 V logic range accepts direct 3.3 V MCU GPIO drive, and the integrated ESD protection exceeds 2 kV HBM for robust handling on the production line. With multiple VNL5050S5-E channels per ECU, the protection features reduce diagnostic complexity and field failure rates compared with discrete MOSFET designs.
おすすめ
Battery Management Load Switching
In 12 V / 48 V mild-hybrid battery management systems, the VNL5050S5-E provides controlled low-side disconnect for precharge resistors, balancing resistors, and auxiliary loads. Its 36 V maximum load voltage covers 12 V and 24 V automotive systems with margin. The current and power limitation features protect the BMS during fault conditions, and the very low standby current extends parked-vehicle quiescent drain budgets. Place a TVS upstream if the system sees load-dump transients above 36 V.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: VNL5050S5-E — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | VNL5050S5TR-E | VNL5050N3-E | VNL5160S5-E |
|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 8-SOIC | 8-SOIC - same | SOT-223 - different | 8-SOIC - same |
| Logic Supply Voltage | 3.5 V to 5.5 V | 3.5 V to 5.5 V | 3.5 V to 5.5 V | 3.5 V to 5.5 V |
| Switch Configuration | Low-side N-Channel | Low-side N-Channel | Low-side N-Channel | Low-side N-Channel |
| Integrated Protection | ESD, avalanche, thermal, current, power limit | Same suite | Same suite | Same suite |
| Automotive Grade (AEC-Q100) | Qualified | Qualified | Qualified | Qualified |
主な差別化要因
- SOIC-8 footprint with full OMNIFET III protection suite （vs Discrete N-channel MOSFET + discrete protection ICs)
- Wide 3.5 V to 5.5 V logic input range （vs Older OMNIFET (5 V only))
- AEC-Q100 automotive qualification （vs Industrial-grade VIPower parts)
設計ノート
At 19 A continuous load the VNL5050S5-E dissipates approximately 18 W into the SOIC-8 package, which has a typical theta_JA near 50-70 C/W on a 1 sq inch copper pour. Junction temperature rise is therefore 25-50 C above ambient at full load. At 25 C ambient the part is within spec; at 85 C ambient (underhood) the part must be derated or the copper area increased to 2-3 sq inches to maintain Tj below 150 C. Estimated thermal calculation based on 50 mOhm Rds(on) and 50 C/W typical SOIC-8 thermal resistance.
The 8-SOIC package has the drain on multiple pins (1, 2, 3, 7, 8) which must all be soldered to a contiguous copper pour that doubles as both electrical connection and thermal spreader. Stitch the drain copper to inner layers with multiple thermal vias directly under the SOIC body. Place the Vcc bypass capacitor (100 nF minimum) within 5 mm of pin 6 with a wide ground return, and keep the input trace (pin 5) away from drain switching edges to avoid noise coupling.
Do not connect loads with a ground-referenced sensor signal to a VNL5050S5-E low-side switch - the switching ground return modulates the sensor ground, introducing errors. Use a high-side driver (VND5160AJTR-E or similar) when sensor ground integrity matters. Also avoid exceeding the internal avalanche energy rating EAS - for very large inductors compute E = 0.5 * L * I^2 and add an external TVS if needed. The input pin has an internal pull-down, so floating MCU pins keep the output OFF by default, but always verify the MCU reset state explicitly.
コンプライアンス情報
AEC-Q100 automotive qualified per STMicroelectronics VIPower OMNIFET III datasheet. RoHS compliant per product page.
