TPS7A8001DRBT - 1A LDO, 6V Adjustable, Low-Noise SON-8 | TI
料号： TPS7A8001DRBT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.66 | $26.60 |
| 100 | $2.36 | $236.00 |
| 500 | $2.12 | $1,060.00 |
| 1,000 | $1.89 | $1,890.00 |
TPS7A8001DRBT 概述
An LDO (low-dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage. As a member of the broader linear regulator family, it falls within the voltage regulator category and ultimately the power management IC hierarchy used in modern electronic systems. Unlike switching regulators, LDOs do not introduce switching noise into the rail, which is the primary reason they are preferred for noise-sensitive analog and RF signal chains.
Key specifications include 32 uVrms output noise (0.1 Hz to 100 kHz), 63 dB PSRR at 1 kHz, and 60 dB PSRR at 1 MHz, achieved through an advanced BiCMOS process and a PMOSFET pass element. The device also provides an active-high enable (EN) input for sequenced power-up, internal soft-start, current limit, and thermal-shutdown protection. The exposed thermal pad on the DRB package keeps junction-to-ambient thermal resistance low for high-current operation.
The TPS7A80 architecture combines a precision bandgap reference with a high-gain error amplifier driving the PMOS pass device. This topology minimizes load-transient overshoot while maintaining high DC accuracy, making the regulator well suited as a post-regulator stage following a noisy switching converter.
Typical applications include powering RF transceivers and PLLs in wireless infrastructure, FPGA and DSP core rails in industrial embedded systems, noise-sensitive ADC and DAC reference supplies, and portable/battery-powered electronics where low quiescent current and high efficiency at light loads extend battery runtime.
When designing with the TPS7A8001DRBT, ensure that the input-to-output differential does not exceed 6.5 V at any time, use a minimum 2.2 uF ceramic input capacitor for stability, and provide adequate PCB copper area beneath the exposed pad to manage up to 1 A continuous dissipation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on individual distributor listings, providing engineers a single, citable reference for evaluation and sourcing.
直接替换替代料： TPS7A8001DRBT ——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：
TPS7A8001DRBR
✅ 直接替换📋 参考替代料（不在目录中）
TPS7A8050DRBR
✅ 直接替换📋 参考替代料（不在目录中）
TPS7A8101DRBT
✅ 直接替换📋 参考替代料（不在目录中）
TPS7A8101DRBR
✅ 直接替换📋 参考替代料（不在目录中）
NCP59800
✅ 直接替换📋 参考替代料（不在目录中）
TPS7A8001DRBT 最大额定值与电气特性
| Manufacturer | Texas Instruments |
| Product Type | Low-Dropout (LDO) Linear Regulator |
| 拓扑 | PMOS pass-element, BiCMOS process |
| 输入电压范围 | 2.2 V to 6.5 V |
| 输出电压范围 | 0.8 V to 6.0 V (adjustable) |
| Output Current | 1 A continuous |
| 压差电压 | 170 mV typical at 1 A |
| 输出噪声 | 32 uVrms (0.1 Hz to 100 kHz) |
| PSRR at 1 kHz | 63 dB |
| PSRR at 1 MHz | 60 dB |
| Enable Input | Active-high EN pin |
| 工作温度 | -40 C to +125 C |
| 封装 | 8-pin SON (DRB) 3 mm x 3 mm |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Lead Finish | Lead-free (NiPdAu) |
TPS7A8001DRBT 引脚配置
| 引脚 1 | IN — Input voltage supply |
| 引脚 2 | IN — Input voltage supply |
| 引脚 3 | EN — Active-high enable input |
| 引脚 4 | ADJ — Feedback/adjust input for resistor divider |
| 引脚 5 | GND — Ground reference |
| 引脚 6 | NC — Not connected (per datasheet) |
| 引脚 7 | OUT — Regulated output voltage |
| 引脚 8 | OUT — Regulated output voltage |
| 引脚 9 | EP — Exposed thermal pad - connect to GND plane |
典型应用
TPS7A8001DRBT 适用于 7 应用s: RF Transceiver and PLL Power Rail, FPGA and DSP Core Voltage Rail, Precision ADC and DAC Reference Supply, Audio Codec and DAC Power Supply, Portable and Battery-Powered Electronics, Industrial Sensor and Instrumentation Modules, Post-Regulator Stage After Switching Converter.
RF Transceiver and PLL Power Rail
The TPS7A8001DRBT's 32 uVrms output noise and 63 dB PSRR at 1 kHz make it well suited as the post-regulator for RF transceiver and PLL/VCO power rails in wireless infrastructure and SDR platforms. Placed between a 3.3 V or 5 V switching pre-regulator and the RF AVDD pin, it suppresses switching-converter ripple by 63 dB at 1 kHz and 60 dB at 1 MHz, lowering phase noise contribution from supply modulation. The 1 A continuous output supports multi-band transceivers where the LNA, mixer, and VCO draw from a common low-noise rail. Use a 2.2 uF X7R ceramic input capacitor and a 1 uF output capacitor placed within 5 mm of the SON-8 (DRB) exposed pad to preserve PSRR.
推荐
FPGA and DSP Core Voltage Rail
The TPS7A8001DRBT delivers up to 1 A from a 3.3 V or 5 V intermediate bus to FPGA core, DSP, or microcontroller rails that require 0.8 V to 6.0 V with tight regulation. Its 170 mV dropout at 1 A allows operation from a 1.0 V to 5.5 V source while maintaining headroom, and the BiCMOS topology provides fast transient response to load steps caused by SerDes or processor block-switching events. The DRB 3x3 mm footprint and exposed thermal pad keep the regulator compact enough to place adjacent to the IC it powers, minimizing PCB trace inductance and improving supply integrity for high-speed logic.
推荐
Precision ADC and DAC Reference Supply
Precision successive-approximation and sigma-delta ADCs/DACs reference their conversion accuracy directly to the noise and stability of their analog supply rail. The TPS7A8001DRBT's 32 uVrms integrated noise and 63 dB PSRR keep reference-induced error below 1 LSB at 16-bit resolution, while the 0.8 V to 6.0 V adjustable range covers 2.5 V, 3.3 V, 4.096 V, and 5 V reference rails. Place the LDO close to the converter AVDD pin with a 1 uF X7R output capacitor, and avoid routing digital return currents through the LDO ground pour to preserve CMRR.
推荐
Audio Codec and DAC Power Supply
Audio DACs, headphone amplifiers, and microphone preamplifiers expose their noise floor directly to the listener, making supply-induced hiss unacceptable in premium audio designs. The TPS7A8001DRBT's 32 uVrms output noise from 0.1 Hz to 100 kHz translates to better than 100 dB SNR when powering the analog rail of an audio DAC, and its active-high EN pin allows sequenced power-up to suppress pop noise. The DRB 3x3 mm package is small enough to fit alongside the codec IC on densely populated portable-audio PCBs.
推荐
Portable and Battery-Powered Electronics
Portable instruments, wearables, and battery-powered sensor nodes benefit from the TPS7A8001DRBT's wide 2.2 V to 6.5 V input range, which covers single-cell Li-Ion (3.0 V to 4.2 V), two-cell alkaline (2.2 V to 3.2 V), and USB 5 V rails with one part number. The PMOS pass device architecture minimizes quiescent current draw at light loads, extending battery runtime when the regulator idles between sensor acquisitions. The 1 A capability supports peak loads such as wireless transmission bursts while the device's thermal shutdown protects against sustained overload conditions.
推荐
Industrial Sensor and Instrumentation Modules
Industrial 4 mA to 20 mA loop transmitters, process-control analog front ends, and factory-automation sensor modules require clean rails to maintain measurement accuracy across -40 C to +125 C operating ranges. The TPS7A8001DRBT's industrial temperature rating, 32 uVrms noise, and 63 dB PSRR support 16-bit-class instrumentation accuracy even when powered from noisy 24 V industrial buses stepped down to 5 V or 3.3 V. The exposed thermal pad of the SON-8 (DRB) package sustains continuous 1 A output in sealed enclosures without requiring an external heatsink.
推荐
Post-Regulator Stage After Switching Converter
When system efficiency demands a switching buck regulator but the load still requires clean power, the TPS7A8001DRBT serves as a low-noise post-regulator stage. Placing the LDO downstream of a 3.3 V or 5 V buck reduces the switching ripple by the LDO's 60 dB PSRR at 1 MHz, producing a hybrid power chain that combines the high efficiency of a switcher with the low noise of an LDO. The 170 mV dropout allows tight cascading with most 3.3 V rails without excessive thermal load.
推荐
推荐产品汇总
工程参考数据： TPS7A8001DRBT ——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 | TPS7A8001DRBR | TPS7A8050DRBR | TPS7A8101DRBT | TPS7A8101DRBR | NCP59800 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
| Package | SON-8 (DRB) 3x3 mm | SON-8 (DRB) 3x3 mm - same | SON-8 (DRB) 3x3 mm - same | SON-8 (DRB) 3x3 mm - same | SON-8 (DRB) 3x3 mm - same | DFN-8 3x3 mm - footprint-similar |
| Output Current | 1 A | 1 A | 1 A | 1 A | 1 A | 1 A |
| Input Voltage Range | 2.2 V to 6.5 V | 2.2 V to 6.5 V | 2.2 V to 6.5 V | 2.2 V to 6.5 V | 2.2 V to 6.5 V | 2.5 V to 6.0 V |
| Output Voltage | 0.8 V to 6.0 V (adj) | 0.8 V to 6.0 V (adj) | 5.0 V (fixed) | 0.8 V to 6.0 V (adj) | 0.8 V to 6.0 V (adj) | 0.8 V to 5.0 V (adj) |
| Enable Pin | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes (active-high) | Yes |
关键差异点
- Higher output current at lower noise than NCP59800 （对比 NCP59800 (onsemi))
- Lower noise variant available in same footprint （对比 TPS7A8050DRBR)
- Adjustable output vs fixed 5 V variant （对比 TPS7A8050DRBR)
设计说明
Place the TPS7A8001DRBT input and output ceramic capacitors within 5 mm of the SON-8 (DRB) pins to preserve the 63 dB PSRR at 1 kHz. Use X7R or X5R dielectric, 2.2 uF minimum on VIN and 1 uF minimum on VOUT per TI TPS7A80 datasheet. The exposed thermal pad (pin 9) MUST be soldered to a continuous GND copper plane of at least 1 square inch to keep theta_JA within published limits at 1 A continuous load.
Estimated: at VIN = 5 V, VOUT = 3.3 V, and 1 A continuous load, internal dissipation is (5 - 3.3) x 1 = 1.7 W. With the DRB 3x3 mm package and a 1 square-inch copper pour, junction-to-ambient thermal resistance is approximately 45 C/W, yielding a junction rise of ~76 C above ambient. For sustained operation above 70 C ambient, reduce VIN-VOUT differential or add additional copper area beneath the exposed pad to avoid thermal shutdown (typically 170 C).
Do not exceed the 6.5 V absolute maximum on VIN - even brief transients above this rating can permanently damage the PMOS pass device. Use 1% tolerance or better feedback resistors for the ADJ divider to maintain output accuracy; high-impedance dividers are sensitive to PCB leakage. When EN is left floating, the device defaults to enabled state; tie EN to VIN through a 100 kohm resistor if a controlled startup is required.
Route the feedback (ADJ) trace away from switching nodes and noisy digital lines to prevent coupling that would degrade PSRR. Keep the ADJ node impedance low (<50 kohm) by placing the upper and lower divider resistors within 2 mm of the ADJ pin. Use a star-ground topology tying the LDO ground, output capacitor ground, and load ground at a single point to avoid ground-loop noise injection into the analog rail.
When powering RF transceivers or high-speed SerDes, place the TPS7A8001DRBT upstream of the final ferrite-bead-and-capacitor filter network to combine the LDO's low-frequency PSRR with the bead's high-frequency attenuation. For ADC reference rails, add a 10 ohm series resistor between LDO output and reference pin to decouple the ADC's switching charge-injection transients from the LDO control loop.
合规信息
RoHS and lead-free confirmed per TI TPS7A80 datasheet and DigiKey product listing. Not AEC-Q100 qualified - see TPS7A8001-Q1 variant for automotive applications.
