BTS3028SDLATMA1 - 5A Low-Side Smart Switch | Infineon
MPN： BTS3028SDLATMA1 ✓ 啟用中BTS3028SDLATMA1 概覽
A low-side switch is a power switch placed between the load and ground, allowing the load to be grounded on one terminal. Smart low-side switches integrate the MOSFET and protection logic into a single IC, replacing discrete MOSFET-plus-driver solutions. They sit hierarchically within the broader category of power distribution switches, which are sub-classes of power management ICs used in 12 V/24 V automotive and industrial buses.
Key specifications include an operating voltage range of 2 V to 10 V (load supply), a typical on-state resistance of 28 mΩ at 25 °C, continuous drain current up to 5 A, and a junction temperature range of -40 °C to +150 °C. The device is AEC-Q100 qualified for automotive environments and offers status feedback via a STATUS pin, supporting fault detection and load diagnostics. Its monolithic integration reduces PCB area versus a discrete MOSFET plus a fuse or external current-sense circuit.
Typical applications include automotive body and chassis loads (lighting, solenoids, motors), industrial 24 V relay and valve drivers, PLC digital outputs, and any 12 V/24 V load requiring resettable overcurrent protection. The device is particularly useful where a fuse-replacement function is desired, since its current limit and thermal shutdown provide automatic fault recovery without fuse replacement.
When designing with this part, observe the SOA limits in the datasheet, ensure the STATUS pull-up is correctly biased, and provide sufficient copper area on the tab for heatsinking. Compared with discrete MOSFETs, the integrated protection reduces BOM count, but the on-resistance is higher than the lowest-RDS(on) discrete parts — a trade-off in favor of protection and diagnostic features.
This page synthesizes distributor pricing across six channels, drop-in alternatives in the same DPAK footprint, and practical design notes for both automotive and industrial 24 V buses — practical context not found in the manufacturer datasheet alone.
直接替換替代品，適用於 BTS3028SDLATMA1 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： BTS3028SDLATMA1 （相同外形與佔位） — 差異在於 Package, Operating Temperature Range, Technology, Topology, Continuous Load Current.
BTS3028SDL
✅ 直接替換📋 參考替代品（不在目錄中）
BTS452TATMA1
✅ 直接替換聯絡詢價
查看資料表 →BTS3134NHUMA1
✅ 直接替換聯絡詢價
查看資料表 →BTS3030SDL
✅ 直接替換📋 參考替代品（不在目錄中）
BSL215CH6327XTSA1
✅ 直接替換聯絡詢價
查看資料表 →BSS316NH6327XTSA1
✅ 直接替換聯絡詢價
查看資料表 →BTS3028SDLATMA1 最大額定值與電氣特性
| Product Type | Smart Low-Side Power Switch |
| 拓撲 | 1:1 N-Channel, Single Channel |
| Load Supply Voltage Range | 2 V to 10 V |
| Continuous Drain Current (I_D) | 5 A |
| On-State Resistance (R_DS(on)) | 28 mΩ (typ at 25 °C, V_IN = 5 V) |
| Overvoltage Clamp | Yes (integrated) |
| Overtemperature Shutdown | Yes (integrated) |
| Current Limitation | Yes (integrated) |
| ESD Protection | Yes (integrated) |
| STATUS Feedback Pin | Yes |
| 工作溫度範圍 | -40 °C to +150 °C (T_j) |
| 封裝 | PG-TO252-3-11 (DPAK, 3-pin + tab) |
| 安裝類型 | Surface Mount |
| Automotive Qualification | AEC-Q100 qualified |
| RoHS 狀態 | Compliant |
BTS3028SDLATMA1 腳位配置
| 腳位 1 | GND — Ground / source return |
| 腳位 2 | IN — Logic-level input (drives gate) |
| 腳位 3 | STATUS — Open-drain status feedback |
| 腳位 Tab | OUT / Drain — Switched output (load return to ground via FET) |
安全工作區 (DC)
典型應用
BTS3028SDLATMA1 適用於 6 應用s: Automotive Body & Lighting Loads, Solenoid and Valve Drivers (24 V Industrial), PLC Digital Outputs, Relay Replacement / Smart Fuse, DC Motor Drive (Small Brushed), LED Driver Low-Side Switch.
Automotive Body & Lighting Loads
The BTS3028SDLATMA1 is designed for 12 V/24 V automotive body and chassis loads such as lamps, LED drivers, and small motors. With 5 A continuous current and 28 mΩ R_DS(on), it can drive a pair of 55 W headlamps with low conduction loss. The integrated overtemperature shutdown, overvoltage clamp, and STATUS feedback enable AEC-Q100 qualified ECUs to detect open-load and short-circuit faults without external fuses.
推薦
Solenoid and Valve Drivers (24 V Industrial)
In industrial PLCs and process-control boards, the BTS3028SDLATMA1 drives 24 V solenoids, valves, and relay coils. Its 28 mΩ R_DS(on) keeps dissipation manageable at 5 A, while integrated current-limit protection prevents coil-induced transients from destroying the FET. The STATUS pin can signal the PLC CPU when a load is open or shorted, enabling predictive maintenance.
推薦
PLC Digital Outputs
As a low-side switch in a PLC digital-output module, the BTS3028SDLATMA1 replaces discrete MOSFET-plus-fuse circuits with a single AEC-Q100 qualified IC. Its 5 A rating covers most 24 V field-side loads, while integrated current limiting and thermal shutdown provide resettable overcurrent protection — eliminating fuse replacement in the field.
推薦
Relay Replacement / Smart Fuse
The BTS3028SDLATMA1 functions as a resettable electronic fuse in 12 V/24 V distribution systems. Compared to a traditional fuse, it offers current limiting, thermal shutdown, and STATUS-based fault signaling — all in a single DPAK. This reduces service costs in deployed systems and enables remote fault diagnostics over CAN/LIN buses.
推薦
DC Motor Drive (Small Brushed)
For small brushed DC motors (window lifts, seat adjusters, mirror actuators), the BTS3028SDLATMA1 provides a compact low-side drive stage. Its 5 A continuous rating handles typical small-motor stall currents, and integrated protection prevents destruction from locked-rotor events. For bidirectional drive, two BTS3028SDLATMA1 devices in an H-bridge configuration are typically used.
推薦
LED Driver Low-Side Switch
The BTS3028SDLATMA1 can switch LED strings in automotive tail-light, daytime-running-light, and interior-lighting modules. With its 28 mΩ R_DS(on) and 5 A capability, it drives LED chains up to roughly 60 W. Integrated protection ensures survival of LED short-circuit faults — a common failure mode in automotive lighting.
推薦
推薦產品摘要
工程參考資料，適用於 BTS3028SDLATMA1 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | BTS3028SDL | BTS452TATMA1 | BTS3134NHUMA1 | BTS3030SDL |
|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | PG-TO252-3-11 (DPAK) | PG-TO252-3-11 (DPAK) - same | PG-TO252-3-11 (DPAK) - same | PG-TO252-3-11 (DPAK) - same | PG-TO252-3-11 (DPAK) - same |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | Yes |
| Integrated Protection | OT, OV, CL, ESD | OT, OV, CL, ESD | OT, OV, CL, ESD | OT, OV, CL, ESD + diagnostics | OT, OV, CL, ESD |
| STATUS Feedback | Yes | Yes | Yes | Yes (enhanced) | Yes |
主要差異化特點
- Single-DPAK integrated smart switch with full protection suite (對比Discrete N-channel MOSFET + fuse)
- AEC-Q100 qualified for automotive use (對比Industrial-only low-side switches)
- 28 mΩ R_DS(on) in DPAK for 5 A continuous (對比BSL215CH6327XTSA1 (smaller PG-TSOP-6 package))
設計說明
Estimated: at 5 A continuous load and 28 mΩ R_DS(on), power dissipation is approximately 0.7 W, which raises junction temperature by roughly 70 °C above ambient on a standard 1 oz copper DPAK footprint. For sustained operation near 5 A, attach the tab to at least 1 sq inch of copper pour on a 2-layer FR-4 board. Above 100 °C ambient, thermal shutdown may engage — derate current or improve heatsinking accordingly.
Place a 100 nF ceramic decoupling capacitor near the IN pin to suppress logic-supply transients from the gate drive. Use wide copper traces on the OUT/tab to the load, as the full load current flows through this path. Connect the tab to a large copper pour for both electrical and thermal performance — this is the dominant heat-spreading path for the DPAK package.
Do not apply reverse battery voltage directly to the load supply without external protection — the BTS3028SDLATMA1 is not designed for sustained reverse polarity. Add a reverse-battery blocking diode or use Infineon's higher-voltage HITFET variants (e.g., BTS3134NHUMA1) if reverse polarity is required. Also, ensure the STATUS pull-up is rated for the load-supply voltage; tying it directly to a 5 V logic rail when the load is at 10 V can damage the open-drain transistor.
合規資訊
RoHS compliant and AEC-Q100 qualified per Infineon product page. Lead-free and halogen-free per PG-TO252-3-11 package documentation.
