TLS805B1LDV50XUMA1 - 50mA, 42V LDO Regulator 5V Fixed | Infineon
MPN： TLS805B1LDV50XUMA1 ✓ 啟用中TLS805B1LDV50XUMA1 概覽
An LDO (low-dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is only slightly above the output. LDOs sit in the broader power management hierarchy: LDO → linear regulator → voltage regulator → power management IC → semiconductor. They are preferred over switching regulators in noise-sensitive analog and RF rails because they introduce no switching ripple and require only small input/output capacitors.
Key features include a 5.5 µA typical quiescent current that supports permanently-powered ECUs, 100 mV typical dropout at full 50 mA load that extends headroom for cold-crank automotive transients, integrated output current limit, thermal shutdown, and an Enable pin for power sequencing. The PG-TSON-10 package with exposed pad achieves a low thermal resistance suitable for continuous 50 mA operation.
Architecturally, the TLS805B1 uses a bipolar pass element with internal bandgap reference and uses the exposed thermal pad as both the die substrate connection and the primary heat dissipation path. The wide VIN tolerance and automotive-grade qualification make it robust against load-dump transients up to 42 V. The output is fixed at 5.0 V with ±2 % accuracy across the full operating temperature range.
Typical applications include automotive body and chassis ECUs, industrial sensor supplies, IoT battery-powered nodes, and standby rails in microcontroller systems. The low IQ makes it especially suitable for CAN/LIN transceivers that must remain active when the main ECU is asleep.
Designers should place a 1 µF X7R ceramic bypass capacitor within 5 mm of the input and output pins, and solder the exposed pad to a copper pour of at least 50 mm² to keep the junction temperature below the 150 °C shutdown threshold.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical layout notes that supplement the official Infineon datasheet for engineer-facing evaluation.
直接替換替代品，適用於 TLS805B1LDV50XUMA1 — 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： TLS805B1LDV50XUMA1 （相同外形與佔位） — 差異在於 Package, Dropout Voltage, Maximum Output Current, Input Voltage Range, Output Voltage.
TLS805B1LDV33XUMA1
✅ 直接替換📋 參考替代品（不在目錄中）
TLS805B1LDVXUMA1
✅ 直接替換📋 參考替代品（不在目錄中）
TLS805B1LDV50ATMA1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TLS810B1LDV50XUMA1
✅ 直接替換聯絡詢價
查看資料表 →TLS805B1LDV50XUMA1 最大額定值與電氣特性
| Manufacturer | Infineon Technologies |
| Product Family | OPTIREG linear TLS805 |
| Regulator Type | LDO (Low-Dropout) Linear Regulator, Positive Fixed |
| 輸出電壓 | 5.0 V (fixed) |
| Output Voltage Accuracy | ±2 % |
| 輸入電壓範圍 | 2.75 V to 42 V |
| 最大輸出電流 | 50 mA |
| 壓降電壓 | 100 mV typical @ 50 mA |
| Quiescent Current (Iq) | 5.5 µA typical |
| Off-Mode Current | < 1 µA |
| Output Current Limit | Integrated |
| 過熱關機 | Integrated |
| 致能腳位 | Yes |
| 工作溫度範圍 | -40 °C to +150 °C junction |
| 封裝 | PG-TSON-10 (exposed pad) |
| 安裝類型 | Surface Mount |
| Moisture Sensitivity Level | MSL 2 (per JEDEC J-STD-020) |
| RoHS Compliance | RoHS-compliant (green product, Pb-free) |
TLS805B1LDV50XUMA1 pg-tson-10 (exposed pad) 腳位配置指南
TLS805B1LDV50XUMA1（pg-tson-10 (exposed pad) 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： TLS805B1LDV50XUMA1.
請參閱 資料表 以查看完整腳位配置。
典型應用
TLS805B1LDV50XUMA1 適用於 6 應用s: Automotive Body and Chassis ECU Always-On Supply, Industrial Sensor and Transmitter Supply, IoT Battery-Powered Node Standby Rail, CAN/LIN Transceiver Power Supply, Microcontroller Standby Voltage Rail, LED Indicator and Backlight Driver Supply.
Automotive Body and Chassis ECU Always-On Supply
The TLS805B1LDV50XUMA1 is a strong fit for always-on body and chassis ECUs (door modules, seat controllers, BCMs) that draw a few mA standby current and must survive 12 V cold-crank and load-dump transients. Its 5.5 µA quiescent current keeps the battery drain negligible when the vehicle is parked, while the 42 V maximum input handles the ISO 7637-2 load-dump pulse without external TVS protection. The fixed 5.0 V output powers CAN/LIN transceivers and wake-up logic directly. Placed between the battery feed and the ECU microcontroller's standby rail with a 1 µF X7R input capacitor and 1 µF X7R output capacitor within 5 mm of the pins, the regulator provides clean power with no switching noise. Unlike a switching pre-regulator, the TLS805B1LDV50XUMA1 adds no EMI and simplifies EMI compliance for the always-on rail.
推薦
Industrial Sensor and Transmitter Supply
Industrial 4-20 mA loop-powered transmitters and field sensors benefit from the TLS805B1LDV50XUMA1's 42 V input tolerance, which accepts 24 V industrial bus rails directly. The 5.0 V fixed output powers microcontroller cores, ADC references, and HART modem chips with ±2 % accuracy. Its 5.5 µA quiescent current extends battery life in remote wireless sensor nodes that spend most of their life in sleep mode. The PG-TSON-10 exposed pad allows continuous 50 mA operation without heatsinking on a 50 mm² copper pour, critical for space-constrained sensor housings. The integrated current limit and thermal shutdown protect against field wiring faults and short-circuit conditions. This part complements Infineon's XMC1000 microcontrollers in compact industrial sensor designs.
推薦
IoT Battery-Powered Node Standby Rail
Battery-powered IoT nodes (smart locks, environmental sensors, asset trackers) require standby rails that draw minimum current between wake events. The TLS805B1LDV50XUMA1's 5.5 µA Iq and sub-1 µA off-mode current make it ideal for keeping a wireless MCU or sensor in low-power sleep while monitoring a wake-up interrupt. The wide 2.75 V to 42 V input lets designers connect the LDO directly to a lithium-ion battery (4.2 V max), a 9 V battery, or even a USB/12 V adapter without reconfiguration. The 100 mV dropout ensures the 5.0 V output remains in regulation as the battery sags to 5.1 V under load. The Enable pin allows a host MCU to gate the output completely when the node enters deep sleep, reducing total system quiescent current below the LDO's own Iq floor.
推薦
CAN/LIN Transceiver Power Supply
Automotive CAN and LIN transceivers require a stable 5.0 V supply that remains active during vehicle sleep for wake-on-CAN/LIN functionality. The TLS805B1LDV50XUMA1 provides this 5.0 V rail with 5.5 µA quiescent current, an order of magnitude lower than most switching alternatives, ensuring battery drain is minimized during long parking periods. Its ±2 % output accuracy meets the 5 V tolerance requirements of ISO 11898-1 CAN transceivers, and the 42 V load-dump tolerance allows direct connection to the battery bus. The exposed-pad PG-TSON-10 package dissipates the small (~250 mW at 50 mA) standby power without thermal concern. Designers typically pair this LDO with an Infineon TLE7250 LIN or TLE9251 CAN transceiver on the same PCB.
推薦
Microcontroller Standby Voltage Rail
Many 32-bit microcontrollers require a permanent 5.0 V standby rail to power the RTC, backup SRAM, and wake-up logic when the main core is powered down. The TLS805B1LDV50XUMA1 fits this role perfectly: its 5.5 µA Iq keeps standby drain negligible, the Enable pin allows the MCU to fully gate the LDO during deep-sleep states, and the 42 V input tolerates industrial 24 V or automotive 12 V rails directly. The 100 mV dropout extends usable battery life when the input droops. This LDO is commonly used as a companion to a higher-current switching regulator that powers the MCU's main rail, with the TLS805B1 supplying the always-on domain. The PG-TSON-10 package complements switching regulators in the same design without requiring extra board area.
推薦
LED Indicator and Backlight Driver Supply
The TLS805B1LDV50XUMA1 can power LED status indicators, small backlight strings, and optocoupler LEDs in industrial control panels and automotive interior lighting. At 50 mA it can drive a string of 3-5 white LEDs at 10-15 mA each with a series resistor, or a single high-brightness LED at full current. Its ±2 % output accuracy keeps LED brightness consistent across temperature, and the 42 V input accepts 24 V industrial panel supplies. The linear topology means no switching EMI, which is critical when LEDs are co-located with sensitive analog or RF circuitry on the same board. The exposed pad PG-TSON-10 footprint handles the continuous 50 mA load with minimal temperature rise. Designers often pair this LDO with a low-side MOSFET or BCR431U current regulator for precise LED current control.
推薦
推薦產品摘要
工程參考資料，適用於 TLS805B1LDV50XUMA1 — 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 | TLS805B1LDV33XUMA1 | TLS805B1LDVXUMA1 | TLS805B1LDV50ATMA1 | TLS810B1LDV50XUMA1 |
|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | PG-TSON-10 | PG-TSON-10 - same | PG-TSON-10 - same | PG-TSON-10 - same | PG-TSON-10 - same |
| Output Voltage | 5.0 V fixed | 3.3 V fixed | Adjustable | 5.0 V fixed | 5.0 V fixed |
| Maximum Output Current | 50 mA | 50 mA | 50 mA | 50 mA | 100 mA |
| Input Voltage Range | 2.75 V to 42 V | 2.75 V to 42 V | 2.75 V to 42 V | 2.75 V to 42 V | 2.75 V to 42 V |
| Quiescent Current | 5.5 µA | 5.5 µA | 5.5 µA | 5.5 µA | 11 µA |
| Dropout Voltage | 100 mV @ 50 mA | 100 mV @ 50 mA | 100 mV @ 50 mA | 100 mV @ 50 mA | 250 mV @ 100 mA |
| Automotive Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 Grade-1 | AEC-Q100 |
主要差異化特點
- Ultra-low 5.5 µA quiescent current for always-on applications (對比TLS810B1LDV50XUMA1)
- Fixed 5.0 V output eliminates external feedback resistors (對比TLS805B1LDVXUMA1)
- Wide 42 V input voltage for direct battery connection (對比TLS805B1LDV33XUMA1)
設計說明
Place the 1 µF X7R input and output ceramic capacitors within 5 mm of the VIN and VOUT pins respectively, using short and wide traces to minimize parasitic inductance. The PG-TSON-10 exposed pad must be soldered to a copper pour of at least 50 mm² on the top or bottom layer to provide thermal dissipation; without adequate thermal contact, the junction temperature will rise rapidly under sustained 50 mA load. Connect multiple thermal vias (0.3 mm drill, 0.6 mm pad) under the exposed pad to an inner plane for additional heat spreading.
At VIN=12 V, VOUT=5 V, and full 50 mA load, power dissipation is approximately (12-5) × 0.050 = 0.35 W. The PG-TSON-10 with 50 mm² copper pour achieves theta_JA of approximately 60-80 °C/W, resulting in a 25-30 °C temperature rise above ambient. This is well below the 150 °C thermal shutdown threshold under normal conditions. Estimated: power dissipation 0.35 W at VIN=12 V/VOUT=5 V/IOUT=50 mA; verify against the actual theta_JA from the datasheet thermal table for the chosen PCB copper area.
Do not exceed the absolute maximum VIN of 42 V; even brief transients beyond this limit can permanently damage the device. For automotive 12 V/24 V systems with possible load-dump pulses beyond 42 V, add an external TVS diode (such as a 36 V SMBJ series) at VIN. Do not operate the regulator without the input capacitor, as the inductive supply line can cause VIN to overshoot during load steps. The Enable pin must not be left floating; tie it to VIN through a 10-100 kΩ resistor or drive it actively with the host MCU.
合規資訊
RoHS-compliant green product per Infineon datasheet 2016-08-23, Pb-free finish suitable for Pb-free soldering per IPC/JEDEC J-STD-020. AEC-Q100 qualified for automotive applications.
