TPS62825DMQR - 2A Step-Down Converter 2.4-5.5V | Texas Instruments
料号： TPS62825DMQR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.45 | $2.45 |
| 10 | $2.18 | $21.80 |
| 100 | $1.85 | $185.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.4 | $1,400.00 |
| 3,000 | $1.2 | $3,600.00 |
TPS62825DMQR 概述
A step-down converter (also called a buck converter) is a switch-mode DC/DC regulator that converts a higher input voltage to a lower output voltage with high efficiency by rapidly switching an inductor and rectifying the resulting waveform. As a member of the broader DC/DC converter family, it sits hierarchically under switching regulators, then voltage regulators, then power management ICs. This category is essential in modern battery-powered and space-constrained electronics because linear regulators waste VIN-VOUT * IOUT as heat, whereas a properly designed buck like the TPS62825 typically achieves 90%+ efficiency across most of its load range.
Key features of the TPS62825DMQR include a best-in-class quiescent current of 4 µA (light-load), 2-A continuous output current, 2.4-V to 5.5-V input voltage range, output voltage adjustable from 0.6 V up to 4 V, 2.2-MHz fixed switching frequency, power-good output, and an enable pin that supports power sequencing. The device supports both forced PWM and power-save (DCM) operation, optimizing efficiency at light loads.
The DCS-Control (Direct Control with Seamless transition into power-save mode) architecture combines the fast transient response of hysteretic control with the high efficiency of a pulse-frequency-modulated (PFM) light-load mode. The internal reference is trimmed to 1% accuracy over the -40 °C to +125 °C junction-temperature range, providing a tight output tolerance demanded by core-rail and SoC power requirements.
Typical applications include powering processors, FPGAs, and SoCs from a single-cell Li-ion battery, 5-V USB rails, low-power IoT sensors, portable consumer devices, and wearable electronics. The wide VIN range also makes the part suitable for 3.3-V industrial bus rails.
When designing with the TPS62825DMQR, place the input 4.7-µF ceramic and the 470-nH inductor as close to the IC as possible, return all grounds to a single low-impedance exposed pad, and select the feedback resistors so the output lands within the 0.6-V to 4-V regulation window. With its 2-A rating and compact 1.5-mm x 1.5-mm QFN, it minimizes both PCB area and BOM cost.
This page synthesizes distributor pricing, same-family and cross-brand drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet.
直接替换替代料： TPS62825DMQR ——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：
TPS62825ADMQR
✅ 直接替换📋 参考替代料（不在目录中）
TPS62826DMQR
✅ 直接替换📋 参考替代料（不在目录中）
TPS62824DMQR
✅ 直接替换📋 参考替代料（不在目录中）
TPS62825DMQT
✅ 直接替换📋 参考替代料（不在目录中）
TPS62827DMQR
✅ 直接替换📋 参考替代料（不在目录中）
TPS62825DMQR 最大额定值与电气特性
| 拓扑 | Step-Down (Buck), Synchronous |
| 输入电压范围 | 2.4 V to 5.5 V |
| 输出电压范围 | 0.6 V to 4 V (adjustable) |
| Continuous Output Current | 2 A |
| Output Voltage Accuracy | 1% (over -40C to +125C junction) |
| Quiescent Current (typ) | 4 µA |
| 开关频率 | 2.2 MHz (typical) |
| Control Topology | DCS-Control (forced PWM + PFM) |
| Feedback Reference Voltage | 0.6 V |
| Enable | Yes (active-high) |
| 电源正常输出 | Yes |
| 工作结温 | -40C to +125C |
| 封装 | 6-pin VSON-HR (DMQ) 1.5 mm x 1.5 mm |
| 安装类型 | Surface Mount |
| MSL 等级 | MSL2 (per JEDEC J-STD-020) |
| RoHS 状态 | Compliant |
TPS62825DMQR 引脚配置
| 引脚 1 | AGND — Analog ground; connect to exposed pad and PCB ground plane |
| 引脚 2 | VIN — Input supply voltage (2.4 V to 5.5 V) |
| 引脚 3 | EN — Enable input (active high) |
| 引脚 4 | PG — Power-good open-drain output |
| 引脚 5 | SW — Switch node to external 470-nH inductor |
| 引脚 6 | FB — Feedback voltage (set to 0.6 V via resistor divider) |
典型应用
TPS62825DMQR 适用于 6 应用s: Single-Cell Li-Ion Battery to Core Rail, 5-V USB Powered Sensor Modules, FPGA and SoC Point-of-Load, Industrial 24V Bus to 5V/3.3V Subsystem Rail, Wearables and Hearables, Test and Measurement Instrumentation.
Single-Cell Li-Ion Battery to Core Rail
The TPS62825DMQR regulates a 3.0-4.2 V Li-ion cell down to 0.6-3.3 V core rails at 2 A, ideal for powering application processors and microcontrollers in handheld devices. Its 4 µA quiescent current preserves battery life during standby, while the 2.2-MHz switching frequency allows a 470-nH inductor to keep the total solution under 25 mm². The 1% output voltage tolerance ensures clean power for advanced process nodes.
推荐
5-V USB Powered Sensor Modules
The TPS62825DMQR steps down a 5-V USB rail to 3.3 V or 1.8 V for downstream sensors and MCUs. Its 5.5-V absolute-maximum input tolerates USB hot-plug transients, and the high 2.2-MHz switching frequency moves harmonics above the AM radio band. With 2-A output and 90%+ efficiency across most of the load range, it dissipates far less heat than a 5-V linear regulator in a sealed enclosure.
推荐
FPGA and SoC Point-of-Load
The TPS62825DMQR supplies 2 A to low-power FPGA and SoC aux rails such as 1.0 V, 1.2 V, and 1.8 V from a 3.3 V or 5 V system rail. With 1% accuracy it exceeds the core-voltage tolerance most modern SoCs require, and the 4 µA quiescent current prevents battery drain when the system is off. The power-good output lets the host SoC sequence rails cleanly.
推荐
Industrial 24V Bus to 5V/3.3V Subsystem Rail
For 24 V industrial bus systems the TPS62825DMQR needs a front-end step-down, but as a downstream 5 V to 3.3 V POL converter it delivers 2 A of clean power. The 5.5-V absolute-maximum VIN accommodates transient spikes from relay switching if a TVS clamp is added upstream. Its 1% accuracy and small footprint suit instrumentation modules.
推荐
Wearables and Hearables
The TPS62825DMQR's 1.5 mm x 1.5 mm footprint and 4 µA quiescent current make it ideal for earbud, smartwatch, and fitness-band designs. It can power a small SoC and BLE transceiver from the 3.7 V nominal Li-ion cell while dissipating only a few tens of mW at audio playback loads. The high switching frequency eliminates audible inductor whine.
推荐
Test and Measurement Instrumentation
The TPS62825DMQR powers analog front-ends in bench instruments where low output ripple and 1% accuracy are mandatory. Its high PSRR at 2.2 MHz makes it ideal as the second stage behind a 5-V rail, providing a quiet 3.3 V or 2.5 V supply for precision ADCs and DACs. The power-good output can be wired to a microcontroller GPIO for diagnostic sequencing.
推荐
推荐产品汇总
工程参考数据： TPS62825DMQR ——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 | TPS62825ADMQR | TPS62826DMQR | TPS62824DMQR | TPS62827DMQR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 6-VSON-HR (DMQ) 1.5mm x 1.5mm | 6-VSON-HR (DMQ) 1.5mm x 1.5mm - same | 6-VSON-HR (DMQ) 1.5mm x 1.5mm - same | 6-VSON-HR (DMQ) 1.5mm x 1.5mm - same | 6-VSON-HR (DMQ) 1.5mm x 1.5mm - same |
| Continuous Output Current | 2 A | 2 A | 3 A | 1 A | 4 A |
| Input Voltage Range | 2.4 V to 5.5 V | 2.4 V to 5.5 V | 2.4 V to 5.5 V | 2.4 V to 5.5 V | 2.4 V to 5.5 V |
| Quiescent Current (typ) | 4 µA | 4 µA | 4 µA | 4 µA | 4 µA |
| Switching Frequency | 2.2 MHz | 2.2 MHz | 2.2 MHz | 2.2 MHz | 2.2 MHz |
| Output Voltage Range | 0.6 V to 4 V | 0.6 V to 4 V | 0.6 V to 4 V | 0.6 V to 4 V | 0.6 V to 4 V |
| Automotive Grade (AEC-Q100) | No | Yes | No | No | No |
关键差异点
- Pin-to-pin BOM-to-BOM compatible within TPS6282x family （对比 TPS62826DMQR)
- AEC-Q100 automotive-grade variant available in same package （对比 TPS62825ADMQR)
- Lowest quiescent current in its 2 A class （对比 TPS62824DMQR (1 A))
设计说明
Place the 4.7-µF VIN ceramic capacitor as close to the VIN and PGND pins as possible, with a 0.1-µF decoupling cap in parallel. The exposed thermal pad must be soldered to a PCB thermal land connected by 4-6 thermal vias to the inner ground plane. Estimated: for a 5-V-to-3.3-V conversion at 2 A (3.4 W dissipation), a 1-square-inch copper pour keeps the junction below 100 °C.
Keep the SW node trace as short and wide as practical to minimize radiated EMI, and avoid routing analog signal traces near it. The FB divider resistors should be placed close to the FB pin and the top resistor tied to VOUT at the load-side sense point, not at the IC pin, for accurate regulation under load.
Do not exceed the 7-V absolute-maximum VIN rating or the device may be permanently damaged. The minimum on-time of approximately 50 ns limits the minimum achievable dropout - at very low VIN-VOUT differentials the device may skip pulses. Avoid using an inductor with an AC rating lower than the 2-A saturation current; for 470-nH a 4-A I_sat rating is recommended.
合规信息
RoHS/REACH compliant per TI product page. Standard commercial part - choose TPS62825ADMQR for AEC-Q100 automotive qualification. Halogen-free per TI datasheet.
