TLE4476DATMA1 - Dual 3.3V/5V 350/430mA LDO Regulator | Infineon
料号： TLE4476DATMA1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.49 | $3.49 |
| 10 | $3.2 | $32.00 |
| 100 | $2.85 | $285.00 |
| 500 | $2.5 | $1,250.00 |
| 1,000 | $2.2 | $2,200.00 |
| 2,500 | $1.95 | $4,875.00 |
TLE4476DATMA1 概述
A Low-Dropout (LDO) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage approaches the output voltage within a few hundred millivolts. In the broader power-management taxonomy, an LDO is a sub-class of linear regulators, which sit alongside voltage regulators and DC-DC converters as members of the power management integrated circuit (PMIC) family used in virtually every electronic system.
The Q1 3.3 V rail is sized for microcontroller core and memory supplies, while the Q2 5.0 V rail is sized for CAN transceivers, sensors, and 5 V logic. The 5 V output can also be used to feed a second-stage LDO for sub-rails requiring tighter noise or accuracy. The device is designed to operate from a wide input range suitable for 12 V automotive battery systems and includes integrated protection features such as over-temperature shutdown and short-circuit current limiting on both outputs.
From an architecture standpoint, the regulator combines a bandgap reference, two independent error amplifiers with pass transistors, and protective circuitry on a single die. The fixed output voltages eliminate external feedback resistor dividers, reducing component count and PCB area. The 5-pin PG-TO252-5-11 package provides a low thermal resistance path via the exposed tab, supporting sustained high-current operation on both rails simultaneously.
Typical applications include automotive body and chassis ECUs, infotainment controllers, industrial PLCs, sensor interfaces, and any system that needs to derive both 3.3 V and 5 V from a single 12 V battery rail. The TLE4476DATMA1 is often paired with Infineon TLE42744 or TLE42764 LDOs for post-regulation.
When designing in this part, ensure both rails' worst-case load currents are summed when sizing the PCB copper pour on the tab. Maintain a solid ground return and place input/output capacitors close to the package to keep dropout and ripple within spec.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical layout notes compiled from the Infineon datasheet and distributor inventory data not found in a single manufacturer document.
直接替换替代料： TLE4476DATMA1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TLE4476DATMA1 （相同外形与封装尺寸） ——差异在于 Package, Input Voltage Range, Protection Features, Topology, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
TLE42764DVATMA1
✅ 直接替换✓ 有现货
$0.74 / 个
查看数据手册 →TLE42744DV33ATMA1
✅ 直接替换✓ 有现货
$0.74 / 个
查看数据手册 →TLF80511EJV33XUMA1
✅ 直接替换✓ 有现货
$0.65 / 个
查看数据手册 →TLE4476DATMA1 最大额定值与电气特性
| 拓扑 | Dual LDO Linear Regulator |
| Output 1 Voltage (Q1) | 3.3 V fixed |
| Output 1 Current (Q1) | 350 mA |
| Output 2 Voltage (Q2) | 5.0 V fixed |
| Output 2 Current (Q2) | 430 mA |
| 输出数量 | 2 |
| 封装 | PG-TO252-5-11 (TO-252, DPAK 4+Tab) |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +150C (TJ) |
| Automotive Qualified | Yes (Infineon OPTIREG family) |
| RoHS 状态 | Compliant |
| Protection Features | Over-temperature shutdown, short-circuit current limit (per datasheet) |
TLE4476DATMA1 引脚配置
| 引脚 1 | IN — Unregulated input supply voltage |
| 引脚 2 | Q2 (5V) — 5.0 V regulated output, up to 430 mA |
| 引脚 3 | GND — Ground |
| 引脚 4 | Q1 (3.3V) — 3.3 V regulated output, up to 350 mA |
| 引脚 5 | TAB — Exposed thermal tab / substrate (must be soldered to PCB copper for thermal dissipation) |
典型应用
TLE4476DATMA1 适用于 7 应用s: Automotive Body and Chassis ECU, Industrial PLC and Sensor Interface Module, Infotainment Head Unit Auxiliary Supply, HVAC and Climate Control Module, Body Control Module (BCM) Peripheral Power, Generic 12V Battery-Powered MCU Board, Lighting and LED Driver Module Auxiliary Supply.
Automotive Body and Chassis ECU
The TLE4476DATMA1's dual 3.3 V / 5 V output rails match the canonical automotive ECU power tree: 5 V for CAN transceivers (e.g., TLE7250 family) and sensor signal conditioning, 3.3 V for the microcontroller core, EEPROM, and LIN slave logic. With 350 mA on the 3.3 V rail and 430 mA on the 5 V rail, it easily powers mid-range 32-bit microcontrollers such as Aurix TC2xx entry-level variants plus a CAN transceiver plus a few sensors. The OPTIREG family qualification and -40C to +150C junction rating support under-hood and body-module thermal environments, while the integrated over-temperature and short-circuit protection allow the regulator to survive load-dump transients and harness shorts common in 12 V automotive systems.
推荐
Industrial PLC and Sensor Interface Module
In industrial PLC analog-input modules and 24 V sensor interface boards, the TLE4476DATMA1 provides both the 5 V supply for analog front-end op-amps and 4-20 mA loop interfaces and the 3.3 V supply for an ADC or microcontroller, all from a single 24 V (post-bulk) rail. The 350 mA / 430 mA budget is sufficient for a 4-channel analog input card with one ADC and several op-amps. Compared to a discrete two-LDO solution, the TLE4476DATMA1 reduces PCB footprint by combining both regulators into one DPAK 4+Tab package and eliminating one enable/reset network.
推荐
Infotainment Head Unit Auxiliary Supply
Automotive infotainment head units require multiple low-voltage rails: 5 V for USB charging controllers, audio CODECs, and legacy logic; 3.3 V for the Bluetooth/Wi-Fi module, MCU, and SD-card logic. The TLE4476DATMA1 supplies both rails from a single post-buck 8 V intermediate rail, simplifying power-tree design and reducing EMI-coupling paths by colocating both LDOs in one thermally efficient DPAK 4+Tab package. The OPTIREG family's automotive-grade qualification and protective features are well matched to the harsh electrical environment inside a head unit (load dump, cold crank, reverse battery).
推荐
HVAC and Climate Control Module
Climate control modules drive small brushed DC fans, NTC thermistor networks, and a microcontroller with display backlight control. The TLE4476DATMA1's 3.3 V / 350 mA rail powers the MCU and the display logic while its 5 V / 430 mA rail powers the fan-driver logic and NTC biasing. The wide operating temperature range (-40C to +150C junction) and integrated thermal shutdown make it suitable for the high-ambient-temperature environment near a vehicle's HVAC housing, where conventional regulators would derate aggressively.
推荐
Body Control Module (BCM) Peripheral Power
Body control modules aggregate door locks, lighting drivers, mirror controllers, and various sensors, requiring isolated low-voltage rails for each sub-function. The TLE4476DATMA1 powers the BCM's main MCU (3.3 V) and the sensor-conditioning stage (5 V) from a single post-reverse-battery-protection input. Its low quiescent current and integrated protection support the BCM's quiescent-current budget required for parking-mode current consumption targets.
推荐
Generic 12V Battery-Powered MCU Board
For prototype and small-volume 12 V-battery-powered MCU boards (e.g., marine electronics, e-bike controllers, off-road vehicle accessories), the TLE4476DATMA1 delivers both 3.3 V and 5 V rails from a single DPAK 4+Tab regulator. The fixed output voltages eliminate the need for external feedback resistors, simplifying BOM and reducing layout errors. Pair with a TVS diode on the input for transient suppression to handle inductive load switching on the 12 V bus.
推荐
Lighting and LED Driver Module Auxiliary Supply
LED-driver modules for automotive exterior lighting often need a 5 V rail for the controller IC and a 3.3 V rail for the MCU driving the CAN/LIN interface. The TLE4476DATMA1 supplies both rails, allowing the main switching LED driver to operate from a separate higher-voltage buck stage while the TLE4476DATMA1 handles housekeeping logic. Its over-temperature shutdown is valuable in the thermally constrained environment of a sealed lamp housing.
推荐
推荐产品汇总
工程参考数据： TLE4476DATMA1 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TLE42764DVATMA1 | TLE42744DV33ATMA1 | TLF80511EJV33XUMA1 |
|---|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | PG-TO252-5-11 (DPAK 4+Tab) | PG-TO252-5-11 (DPAK 4+Tab) - same | PG-TO252-5-11 (DPAK 4+Tab) - same | PG-TO252-5-11 (DPAK 4+Tab) - same |
| Topology | Dual fixed LDO (3.3V + 5V) | Single fixed LDO (5V typical) | Single fixed LDO (3.3V) | Single fixed LDO (3.3V) |
| Automotive Qualified | Yes (OPTIREG family) | Yes (OPTIREG family) | Yes (OPTIREG family) | Yes (OPTIREG family) |
关键差异点
- Two independent fixed rails (3.3 V and 5 V) in a single DPAK package （对比 TLE42744DV33ATMA1)
- Integrated over-temperature and short-circuit protection （对比 TLF80511EJV33XUMA1)
- Automotive-grade OPTIREG family qualification （对比 TLE42764DVATMA1)
设计说明
The PG-TO252-5-11 (DPAK) package dissipates heat primarily through the exposed tab. Estimated: at VIN=12 V, Q1=3.3 V/350 mA and Q2=5.0 V/430 mA (full load on both rails), total dissipation is approximately (12-3.3)*0.35 + (12-5.0)*0.43 = 3.05 W + 3.01 W = 6.06 W. Use a minimum 1 square inch of top-layer copper connected to the tab and thermal vias to the inner plane to keep junction temperature within the -40C to +150C rating.
Place input and output capacitors as close as possible to the package pins and the tab. Use a low-ESR ceramic or tantalum capacitor on each output (typically 1 uF minimum) and a bulk input capacitor to handle load transients. Route the tab to a large copper pour with multiple thermal vias; the tab also serves as the primary heat path and ground reference. Keep high-current output traces short and wide to minimize voltage drop.
Do not exceed the maximum input voltage specified in the datasheet; in 12 V automotive systems add a TVS diode for load-dump protection. Avoid relying on the tab as a sole electrical ground if your PCB has separate analog and power grounds; the tab is primarily thermal and may be tied to power ground only. Do not draw more than 350 mA from the 3.3 V rail or 430 mA from the 5 V rail, or the regulator will enter current-limit or thermal shutdown.
Keep the feedback/ground paths short by placing ground-return vias directly under the tab. Separate the analog ground (sensor input conditioning) from the power ground (high-current loads) and join them at a single point near the regulator's tab. This minimizes ground bounce from the 5 V/430 mA rail coupling into the 3.3 V rail's analog-sensitive loads.
合规信息
RoHS compliant per Infineon OPTIREG family. AEC-Q100 qualification for automotive use is part of the OPTIREG family design - confirm exact grade via the Infineon datasheet ordering table.
