TPS628502QDRLRQ1 - 2A Automotive Buck Converter 2.7V-6V | TI
料号： TPS628502QDRLRQ1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.76 | $1.76 |
| 10 | $1.62 | $16.20 |
| 100 | $1.41 | $141.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $0.99 | $990.00 |
TPS628502QDRLRQ1 概述
A buck converter (step-down switching regulator) is a type of DC-DC converter that uses an inductor and switching elements to convert a higher DC input voltage into a lower regulated DC output voltage at high efficiency. It belongs to the power management IC (PMIC) hierarchy and is preferred over linear regulators when the input-to-output voltage differential is large, because it dissipates far less power as heat. Synchronous buck converters integrate both the high-side and low-side MOSFETs, removing the need for an external Schottky diode and improving efficiency at low output voltages.
Key features include a peak current-mode control topology for fast transient response, a MODE/SYNC pin that accepts an external clock for frequency synchronization or selects forced-PWM versus auto-PWM operation, and a wide Vin range that simplifies designs powered from 3.3-V or 5-V rails or directly from automotive battery transients. The SOT-583 footprint (approximately 1.6 mm x 1.6 mm) keeps the solution area compact, and the 4-MHz switching frequency enables the use of small inductors and ceramic output capacitors.
Typical automotive applications include ADAS sensor power rails, infotainment processors, body electronics modules, and rear-view camera supplies. The device also suits industrial point-of-load conversion and any 5-V distributed-bus system that needs high efficiency in a small area.
When designing with this part, follow the datasheet's minimum on-time and minimum off-time limits carefully when setting the external frequency-adjust resistor; violating these can degrade regulation. Add input ceramic capacitors close to the PGND and VIN pins to minimize ringing and EMI.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, comparison data, and practical design notes that complement the manufacturer datasheet and accelerate component selection.
直接替换替代料： TPS628502QDRLRQ1 ——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：
TPS628501QDRLRQ1
✅ 直接替换📋 参考替代料（不在目录中）
TPS628503QDRLRQ1
✅ 直接替换📋 参考替代料（不在目录中）
TPS628502DRLR
✅ 直接替换📋 参考替代料（不在目录中）
TPS6285021HQDRLRQ1
✅ 直接替换📋 参考替代料（不在目录中）
TPS628502QDRLRQ1 最大额定值与电气特性
| 拓扑 | Synchronous step-down (buck) DC-DC converter |
| 输入电压范围 | 2.7 V to 6 V |
| Continuous Output Current | 2 A |
| Peak Output Current (family) | 3 A |
| 输出电压范围 | 0.6 V to 3.3 V (typical selections per datasheet) |
| 开关频率 | Up to 4 MHz (set by RCF resistor) |
| Control Architecture | Peak current-mode control |
| Synchronization | MODE/SYNC pin supports external clock |
| 封装 | SOT-583 (DRL), 8-pin |
| 工作温度范围 | -40 C to +125 C |
| AEC-Q100 Qualification | Qualified (automotive grade) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| 输出类型 | Adjustable / Fixed (per variant) |
TPS628502QDRLRQ1 引脚配置
| 引脚 1 | VIN — Input supply voltage (2.7 V to 6 V) |
| 引脚 2 | PGND — Power ground return for switching stage |
| 引脚 3 | SW — Switch node - connect to output inductor |
| 引脚 4 | SW — Switch node - connect to output inductor |
| 引脚 5 | BST — Bootstrap supply for high-side gate driver |
| 引脚 6 | EN — Enable input (active high) |
| 引脚 7 | MODE/SYNC — Mode select / external clock synchronization input |
| 引脚 8 | FB/VSEL — Feedback (adjustable) or voltage select input |
典型应用
TPS628502QDRLRQ1 适用于 6 应用s: Automotive ADAS Camera Power Rail, Automotive Infotainment Processor Power, Body Electronics and Lighting Modules, Industrial 5-V Point-of-Load Regulation, USB-Powered Portable Devices, Rear-View and Surround-View Camera Modules.
Automotive ADAS Camera Power Rail
The TPS628502QDRLRQ1's 2-A continuous output, AEC-Q100 qualification, and 4-MHz switching frequency make it well-suited to power the AVDD/DVDD rails of automotive ADAS image sensors and front-view camera modules. The 2.7-V to 6-V Vin range accepts the post-bulk-filtered automotive battery rail directly, while the peak current-mode control delivers fast transient response for sudden load steps when the sensor enters active capture mode. The SOT-583 footprint keeps the solution footprint small enough to place adjacent to the camera connector, minimizing PCB loop area and radiated EMI - critical when the regulator sits next to high-speed MIPI CSI-2 data lines.
推荐
Automotive Infotainment Processor Power
The TPS628502QDRLRQ1 powers the core and I/O rails of automotive infotainment SoCs from a 3.3-V or 5-V intermediate bus. Its 4-MHz switching frequency allows the use of small 0402 inductors and 1-uF ceramic output capacitors, shrinking the total solution to under 25 mm squared - vital for the cramped PCBs behind head-unit displays. Synchronization to an external clock via the MODE/SYNC pin allows the regulator to lock to a frequency offset from sensitive AM/FM tuner bands, eliminating beat-frequency interference in the audio baseband.
推荐
Body Electronics and Lighting Modules
The TPS628502QDRLRQ1 fits body-electronics modules such as LED driver boards, mirror controllers, and seat-control ECUs where 5-V distribution is common. Its high efficiency at light loads (auto-PWM mode) extends quiescent-current budgets during key-off sleep states - critical for meeting automotive <100 µA sleep-current targets. The wide 2.7-V to 6-V input tolerates cranking transients and load-dump events after bulk filtering, and the AEC-Q100 qualification supports PPAP documentation required by Tier-1 suppliers.
推荐
Industrial 5-V Point-of-Load Regulation
Although AEC-Q100 qualified, the TPS628502QDRLRQ1 is equally at home in industrial 5-V distributed-bus systems powering MCUs, FPGAs, and sensors. Its peak current-mode control provides cycle-by-cycle current limiting, protecting downstream silicon from inrush faults. The MODE/SYNC pin enables parallel-rail frequency synchronization across multi-rail designs, reducing beat-tone EMI that plagues dense industrial control boards. The SOT-583 package simplifies hand-rework during prototyping compared to BGA solutions.
推荐
USB-Powered Portable Devices
In USB-powered portable devices, the TPS628502QDRLRQ1 can step down 5-V USB VBUS to 3.3 V or 1.8 V core rails for downstream MCUs and sensors. Its high efficiency at low loads preserves battery life when the device is unplugged and operating from a Li-ion cell (after boost). The 2-A capability supports peak loads from wireless radios during transmission bursts. Although the part is automotive-grade priced, designers sometimes select it for harsh-environment portable applications where AEC-Q100 screening provides extra reliability margin.
推荐
Rear-View and Surround-View Camera Modules
The TPS628502QDRLRQ1's combination of small SOT-583 footprint, 2-A output, and AEC-Q100 qualification makes it a strong fit for rear-view and surround-view camera ECUs that must fit inside the camera housing. The high switching frequency pushes EMI harmonics above the AM-band, simplifying EMC compliance. Synchronizing to an external clock via MODE/SYNC lets multiple camera regulators share a common switching frequency, eliminating inter-module beat interference on shared power harnesses.
推荐
推荐产品汇总
工程参考数据： TPS628502QDRLRQ1 ——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 | TPS628501QDRLRQ1 | TPS628503QDRLRQ1 | TPS628502DRLR | TPS6285021HQDRLRQ1 |
|---|---|---|---|---|---|
| Package | SOT-583 (DRL), 8-pin | SOT-583 (DRL), 8-pin - same | SOT-583 (DRL), 8-pin - same | SOT-583 (DRL), 8-pin - same | SOT-583 (DRL), 8-pin - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Continuous Output Current | 2 A | 1 A (-50%) | 2 A continuous, 3 A peak | 2 A | 2 A |
| Input Voltage Range | 2.7 V to 6 V | 2.7 V to 6 V | 2.7 V to 6 V | 2.7 V to 6 V | 2.7 V to 6 V |
| Switching Frequency | Up to 4 MHz | Up to 4 MHz | Up to 4 MHz | Up to 4 MHz | Up to 4 MHz |
| AEC-Q100 Qualified | Yes | Yes | Yes | No (commercial/industrial) | Yes |
| Output Voltage | Adjustable / Fixed (per variant) | Adjustable / Fixed (per variant) | Adjustable / Fixed (per variant) | Adjustable / Fixed (per variant) | Fixed 3.3 V |
| External Clock Sync | Yes (MODE/SYNC pin) | Yes (MODE/SYNC pin) | Yes (MODE/SYNC pin) | Yes (MODE/SYNC pin) | Yes (MODE/SYNC pin) |
关键差异点
- Pin-to-pin scalability across 1 A / 2 A / 3 A peak in the same SOT-583 footprint （对比 TPS628501QDRLRQ1 / TPS628503QDRLRQ1)
- 4-MHz switching frequency enables small inductors and ceramic-only output caps （对比 MAX20002 (ADI/Maxim))
- AEC-Q100 Grade 1 (-40 C to +125 C) qualification with MODE/SYNC clock synchronization （对比 TPS628502DRLR (non-automotive grade))
设计说明
Place the input ceramic capacitors as close as possible to the VIN and PGND pins to minimize high-frequency switching loop area. Use a 4.7 uF X7R 0402 input cap plus a 0.1 uF 0201 bypass on VIN for high-frequency decoupling. Keep the SW node traces short and avoid routing sensitive analog signals (FB) directly under the inductor or SW copper pour to avoid noise coupling.
Estimated: at Vin = 5 V, Vout = 3.3 V, and Iout = 2 A, the device dissipates roughly (5-3.3)*2 = 3.4 W. The SOT-583 package has a typical theta_JA around 50-60 C/W on a 1-oz 4-layer 1-oz copper 1x1-inch pad, giving a junction-rise of 100-140 C above ambient - adequate for -40 C to +125 C operation, but derate at higher VIN-Vout differentials. Avoid placing the part near heat sources.
Respect the minimum on-time and minimum off-time specifications when setting RCF for the switching frequency or when applying an external synchronization clock via MODE/SYNC, per the TI datasheet. Violating these limits causes sub-harmonic oscillation, output ripple doubling, or loss of regulation. Also ensure the BST capacitor is placed close to the BST and SW pins - a missing or remote BST cap prevents high-side gate drive and the part will fail to start.
For EMI-sensitive designs, enable spread-spectrum clocking (where supported) or synchronize to an external clock offset above the AM band (e.g. >1.7 MHz fundamental or >2.2 MHz with second-harmonic above 1.8 MHz). A small RC snubber on the SW node (typically 1-3 ohm + 1 nF) can reduce ringing by 10-15 dB at the fundamental switching frequency.
合规信息
AEC-Q100 qualified per TI product page and Spirit Electronics distributor listing. RoHS compliant per distributor records. Halogen-free status not explicitly stated in verified data - set to unknown.
