TLV76633QWDRBRQ1 - 500mA 16V LDO Regulator, 3.3V Fixed | Texas Instruments
料号： TLV76633QWDRBRQ1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.32 | $1.32 |
| 10 | $1.18 | $11.80 |
| 100 | $0.96 | $96.00 |
| 500 | $0.85 | $425.00 |
| 1,000 | $0.78 | $780.00 |
TLV76633QWDRBRQ1 概述
An LDO (Low-Dropout) linear regulator is a class of linear voltage regulator that maintains a stable output voltage even when the input-to-output differential is very small, typically a few hundred millivolts. LDOs belong to the broader category of voltage regulators, which sit under power management ICs in a typical system hierarchy: LDO -> linear regulator -> voltage regulator -> power management IC. Unlike switching regulators, LDOs introduce no switching noise but dissipate (VIN - VOUT) x IOUT as heat, so efficiency is directly proportional to the duty ratio.
Key features include an enable pin for power sequencing, internal soft-start to limit inrush current, thermal shutdown, and foldback current limit. The DRB VSON package exposes the die pad for low theta_JA (~50 C/W on 1 oz 4-layer PCB), enabling 500 mA continuous output without an external heatsink at modest VIN-VOUT differentials. The wide 2.5 V to 16 V input range also makes this part a drop-in choice for industrial 12 V or 24 V systems and transformer-derived rectified rails.
Architecturally, the TLV766-Q1 uses a PMOS pass element that yields low dropout and low quiescent current, typically around 50 uA. The internal reference is trimmed for tight initial accuracy (about +/-1.5%) and the device requires only ceramic output capacitors for stable loop compensation, simplifying BOM and PCB area. A separate fixed-3.3 V version (this MPN) eliminates the external feedback resistor network that the adjustable variant needs.
Typical automotive applications include body control modules, infotainment head units, instrument clusters, ADAS sensor power rails, and lighting controllers. Industrial uses include PLC I/O rails, sensor excitation, and 24 V-bus-derived point-of-load regulation where a clean, low-noise rail is required adjacent to a noisy switching pre-regulator.
When designing with the TLV76633QWDRBRQ1, place the input and output capacitors as close to the pins as possible and keep the ground return path short to the exposed thermal pad. Note that the dropout voltage rises with load current, so verify headroom under worst-case VIN transients including 12 V load-dump pulses up to 35 V.
This page synthesizes distributor pricing, AEC-Q100 cross-brand alternatives, and PCB-level design guidance not assembled in the manufacturer datasheet alone, giving automotive and industrial engineers a single reference for evaluation.
直接替换替代料： TLV76633QWDRBRQ1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
TLV76601QWDRBRQ1
✅ 直接替换📋 参考替代料（不在目录中）
TLV76618QWDRBRQ1
✅ 直接替换📋 参考替代料（不在目录中）
TLV76650QWDRBRQ1
✅ 直接替换📋 参考替代料（不在目录中）
TLV76633DRBR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TLV1117LV33DCYR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS7A4530DCQR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TLV76633QWDRBRQ1 最大额定值与电气特性
| 输出类型 | Fixed (3.3 V) |
| 最大输出电流 | 500 mA |
| 输入电压范围 | 2.5 V to 16 V |
| 输出电压 | 3.3 V (nominal) |
| Output Voltage Accuracy | +/-1.5% (typical) |
| 工作温度范围 | -40 C to +125 C (ambient) |
| Junction Temperature Range | -40 C to +150 C |
| 使能引脚 | Yes (active-high) |
| 封装 | VSON-8 (DRB), 3x3 mm |
| 安装类型 | Surface Mount |
| AEC-Q100 Qualification | Yes (Grade 1) |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
| Output Capacitor | Ceramic, low-ESR (per datasheet ESR table) |
TLV76633QWDRBRQ1 引脚配置
| 引脚 1 | IN — Input supply voltage (2.5 V to 16 V) |
| 引脚 2 | GND — Ground reference |
| 引脚 3 | EN — Enable input, active-high, internal pull-up |
| 引脚 4 | NC — Not connected (per datasheet) |
| 引脚 5 | OUT — Regulated output voltage (3.3 V) |
| 引脚 6 | GND — Ground reference / thermal pad |
| 引脚 7 | GND — Ground reference / thermal pad |
| 引脚 8 | GND — Ground reference / thermal pad |
典型应用
TLV76633QWDRBRQ1 适用于 6 应用s: Automotive Body Control Modules, Infotainment Head Unit Auxiliary Rails, ADAS Sensor Power (Radar / Camera Front-End), Industrial PLC I/O and Sensor Power, LED Lighting Controllers and Drivers, Battery Management System (BMS) Secondary Rails.
Automotive Body Control Modules
The TLV76633QWDRBRQ1 supplies 3.3 V rails for microcontroller and CAN transceiver logic inside body control modules that operate from a 12 V automotive battery bus. Its AEC-Q100 Grade 1 qualification and 2.5 V to 16 V input range tolerate cold-crank dips down to ~3 V and load-dump transients above 16 V within the device's 35 V abs-max envelope. The 500 mA output easily powers an MCU plus a CAN-FD transceiver and a handful of LEDs. Place a 1 uF X7R ceramic at the input and a 1 uF X7R at the output within 5 mm of the pins; the exposed thermal pad ties to a 50 mm x 50 mm copper pour for adequate heat spreading when VIN-VOUT x IOUT exceeds ~0.7 W.
推荐
Infotainment Head Unit Auxiliary Rails
Inside an infotainment head unit, the TLV76633QWDRBRQ1 generates clean post-switching 3.3 V for USB-PHY controllers, audio DAC logic, and Bluetooth/Wi-Fi companion ICs. Its PMOS pass element adds no high-frequency switching noise to the audio band, an advantage over a buck-derived rail when the upstream switching frequency falls within audible range. The DRB VSON-8 footprint allows placement directly under the SoC BGA, minimizing trace inductance and IR drop. Input from a 5 V intermediate rail keeps the dropout low (<200 mV) so efficiency stays near the duty ratio, limiting thermal dissipation to ~0.7 W at 500 mA, manageable with the package's ~50 C/W theta_JA on a 1 oz 4-layer PCB.
推荐
ADAS Sensor Power (Radar / Camera Front-End)
For ADAS sensors such as 77 GHz radar MMICs or automotive camera serializers, the TLV76633QWDRBRQ1 supplies a low-noise 3.3 V rail from a 12 V PoL bus. Its PMOS architecture yields low 1 kHz PSRR residual noise and avoids the spurious emissions typical of switching converters that could couple into the radar IF band. The AEC-Q100 Grade 1 rating with -40 C to +150 C junction tolerance covers windshield-mounted sensor operating profiles including direct sun loading. Use a 2.2 uF X7R input capacitor and 2.2 uF X7R output capacitor to meet the ESR window; tie the exposed thermal pad to a 100 mm x 100 mm inner copper pour on the radar module PCB.
推荐
Industrial PLC I/O and Sensor Power
On a 24 V industrial PLC backplane, the TLV76633QWDRBRQ1 steps a 12 V or 15 V intermediate rail to a clean 3.3 V for isolated digital I/O, RS-485 transceivers, and 4-20 mA sensor excitation buffers. While 24 V exceeds the 16 V continuous input, designers place a TVS clamp and bulk filter upstream; the TLV766 tolerates the resulting <16 V well-regulated feed. The wide input range supports both 12 V and 15 V PLC architectures with the same BOM. Thermal performance remains comfortable because most PLC I/O currents stay well under 500 mA per rail, keeping dissipation under 0.5 W and avoiding the need for a heatsink.
推荐
LED Lighting Controllers and Drivers
In automotive LED headlamp or interior lighting modules, the TLV76633QWDRBRQ1 powers the LED controller logic (3.3 V MCU, FET drivers, CAN interface) from the same 12 V battery rail that feeds the LED string current sources. Its low quiescent current (typical ~50 uA when unloaded) keeps standby drain low - important for always-on lighting subsystems that must meet <100 uA quiescent current targets. The DRB VSON-8 footprint fits beneath a QFN LED driver on the same PCB layer, simplifying layout. Place a TVS diode across the input to absorb alternator load-dump events, and ensure the enable pin is pulled up through a 100 kohm resistor for predictable cold-start sequencing.
推荐
Battery Management System (BMS) Secondary Rails
Inside an automotive or industrial BMS, the TLV76633QWDRBRQ1 generates a 3.3 V auxiliary rail for the AFE communication logic, isolated SPI/UART interfaces, and cell-balancing FET drivers. Although the cell stack can reach 60 V or higher, designers step it down with an isolated flyback or buck to ~12 V first, then use the TLV76633QWDRBRQ1 as a quiet post-regulator for noise-sensitive analog sections. The AEC-Q100 qualification supports under-hood mounting near the battery pack, and the -40 C to +125 C ambient rating covers extreme climate exposure. Use a 4.7 uF X7R input cap and 2.2 uF X7R output cap to handle the high di/dt demands of UART and SPI transceivers.
推荐
推荐产品汇总
工程参考数据： TLV76633QWDRBRQ1 ——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 | TLV76601QWDRBRQ1 | TLV76618QWDRBRQ1 | TLV76650QWDRBRQ1 | TLV76633DRBR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VSON-8 (DRB), 3x3 mm | VSON-8 (DRB) - same | VSON-8 (DRB) - same | VSON-8 (DRB) - same | VSON-8 (DRB) - same |
| Output Voltage | 3.3 V fixed | 0.8-12 V (suffix-dependent) | 1.8 V fixed | 5.0 V fixed | 3.3 V fixed (same) |
| Maximum Output Current | 500 mA | 500 mA | 500 mA | 500 mA | 500 mA |
| Input Voltage Range | 2.5 V to 16 V | 2.5 V to 16 V | 2.5 V to 16 V | 2.5 V to 16 V | 2.5 V to 16 V |
| AEC-Q100 Qualification | Yes (Grade 1) | Yes (Grade 1) | Yes (Grade 1) | Yes (Grade 1) | No (non-automotive) |
| Operating Temperature Range | -40 C to +125 C (ambient) | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
| Enable Pin | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) |
关键差异点
- AEC-Q100 Grade 1 qualification with automotive PPAP documentation （对比 TLV76633DRBR (non-automotive))
- Wide 16 V continuous input supports 12 V automotive rails directly （对比 TLV1117LV33DCYR (5.5 V max input))
- Compact VSON-8 (3x3 mm) footprint with exposed thermal pad （对比 TPS7A4530DCQR (SOT-223))
设计说明
Estimated power dissipation in worst case: VIN=12 V, VOUT=3.3 V, IOUT=500 mA gives P_D = (12-3.3)*0.5 = 4.35 W. With DRB VSON-8 theta_JA around 50 C/W on a 1 oz 4-layer PCB (per typical TI package data), the junction temperature rise above ambient is ~218 C, exceeding the +150 C abs-max. Reduce VIN-VOUT by stepping down to a 5 V intermediate rail before the LDO, or derate IOUT below 200 mA. Always tie the exposed thermal pad to a copper pour of at least 50 mm x 50 mm.
Place the input and output ceramic capacitors within 5 mm of the IN and OUT pins, and use the shortest possible GND return to the thermal pad. The TLV766-Q1 datasheet specifies the output capacitor ESR window (typically 1 mOhm to 250 mOhm for stability). Use a 1 uF or 2.2 uF X7R 16 V ceramic; do not substitute Y5V or Z5U dielectrics. Keep high-frequency switching nodes (e.g. upstream buck converter SW node) at least 10 mm away to avoid noise coupling into the LDO feedback loop.
Do NOT substitute a non-automotive TLV76633 variant into an automotive design - the -Q1 suffix and PPAP documentation are required by most OEMs. Do not exceed 16 V continuous input even though the part tolerates short transients above this. The EN pin has an internal pull-up; if left floating the device enables at power-up, which is normally desired but should be confirmed for sequencing requirements. Do not use electrolytic output capacitors - the loop compensation requires ceramic ESR characteristics.
合规信息
AEC-Q100 Grade 1 qualified per TLV766-Q1 datasheet. RoHS and REACH compliant per TI product page. Halogen-free per TI material declaration. PPAP and IMDS documentation available via TI automotive support.
