TPS54202DDCR - 4.5V-28V 2A Sync Buck Converter | TI
料号： TPS54202DDCR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.62 | $0.62 |
| 10 | $0.51 | $5.10 |
| 100 | $0.38 | $38.00 |
| 500 | $0.25 | $125.00 |
| 1,000 | $0.17 | $170.00 |
| 3,000 | $0.12 | $360.00 |
TPS54202DDCR 概述
A buck (step-down) converter is a DC-DC switching regulator that efficiently converts a higher input voltage to a lower output voltage using inductive energy storage and high-frequency switching. Unlike linear regulators, buck converters achieve high efficiency even with large input-to-output voltage differentials. As a synchronous buck, the TPS54202 replaces the freewheeling Schottky diode with an integrated low-side MOSFET, improving light-load and full-load efficiency within the power management IC family.
Key features include the adjustable output range of 0.596V to 26V, a fixed 500kHz switching frequency, and Advanced Eco-mode operation that folds back switching frequency at light loads to extend standby efficiency. The 45uA quiescent current suits always-on and battery-backed systems. EMI-friendly design techniques ease EMC compliance, and integrated overcurrent and thermal shutdown protection ensure robustness. The -40C to +125C junction temperature range supports industrial environments.
Architecturally, the device uses current-mode control with internal compensation, so no external compensation network is needed. Integrated low-RDS(on) MOSFETs deliver high efficiency in the small SOT-23-6 thin package, achieving high power density without a heatsink at moderate loads.
Typical applications include 12V and 24V rail point-of-load conversion in set-top boxes, broadband and networking equipment, industrial supplies, and portable instruments. For example, it efficiently steps 12V down to 3.3V for digital logic with minimal ripple.
Design tip: follow the datasheet recommendation of a 10uF input and 22uF output ceramic capacitor, and keep the SW/BOOT loops tight on the PCB; verify thermal relief on the exposed area for loads above 1.5A.
直接替换替代料： TPS54202DDCR ——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： TPS54202DDCR （相同外形与封装尺寸） ——差异在于 Maximum Output Current, Package, Switching Frequency, Input Voltage Range, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
TPS542021DDCR
✅ 直接替换📋 参考替代料（不在目录中）
TPS54202HDDCR
✅ 直接替换📋 参考替代料（不在目录中）
TPS54302DDCRQ1
✅ 直接替换📋 参考替代料（不在目录中）
TPS561201DDCR
✅ 直接替换✓ 有现货
$0.29 / 个
查看数据手册 →RT8299A
⚡ 相同封装 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TPS54202DDCR 最大额定值与电气特性
| 拓扑 | Synchronous Buck (Step-Down) |
| 输入电压范围 | 4.5 V to 28 V |
| 最大输出电流 | 2 A |
| 输出电压范围 | 0.596 V adjustable |
| 输出数量 | 1 |
| 开关频率 | 500 kHz |
| 静态电流 | 45 uA |
| Control Topology | Current-mode with internal compensation |
| Internal Soft Start | 5 ms |
| Light Load Mode | Advanced Eco-mode |
| Integrated MOSFETs | Yes (high-side and low-side) |
| 工作温度 | -40C to +125C (TJ) |
| 封装 | SOT-23-6 Thin (DDC / TSOT-23-6) |
| 安装方式 | SMD/SMT |
| Protection Features | Overcurrent, thermal shutdown |
| RoHS 状态 | Compliant |
TPS54202DDCR 引脚配置
| 引脚 1 | BOOT — Bootstrap capacitor connection for high-side gate drive |
| 引脚 2 | VIN — Input supply, 4.5V to 28V |
| 引脚 3 | EN — Enable pin with internal pullup (adjustable UVLO via divider) |
| 引脚 4 | FB — Feedback input for output voltage adjustment |
| 引脚 5 | GND — Ground |
| 引脚 6 | SW — Switch node to power inductor |
典型应用
TPS54202DDCR 适用于 6 应用s: Industrial 24V Point-of-Load Power, Networking and Broadband Equipment, Battery-Backed and Always-On Systems, Automotive Auxiliary Power, Portable and Test Instruments, Set-Top Box and Consumer Media Power.
Industrial 24V Point-of-Load Power
The TPS54202DDCR's 28V maximum input accommodates 24V industrial buses with headroom, converting down to 3.3V or 5V at up to 2A for PLC I/O modules, sensors, and control logic. Its 500kHz fixed frequency allows a small inductor, while integrated compensation removes external RC networks. Overcurrent and thermal shutdown protect against field faults, and the -40C to +125C junction range covers unconditioned cabinet environments.
推荐
Networking and Broadband Equipment
Set-top boxes, routers, and broadband CPE step 12V wall-adapter inputs to 3.3V/1.8V logic rails. The TPS54202DDCR's Advanced Eco-mode folds switching frequency at standby, cutting no-load input power to meet energy-efficiency requirements, while 45uA quiescent current minimizes always-on drain. EMI-friendly switching-edge control eases FCC/CISPR conducted-emissions compliance without heavy shielding in plastic enclosures.
推荐
Battery-Backed and Always-On Systems
With only 45uA quiescent current and Eco-mode pulse-skipping, the TPS54202DDCR sustains high efficiency down to milliamp loads in metering, alarm panels, and backup-power modules. The 5ms internal soft start limits inrush when switching to battery, and the adjustable 0.596V reference supports lithium-cell and lead-acid derived rails. Designers should size the output capacitor for stable Eco-mode operation at light load.
推荐
Automotive Auxiliary Power
For automotive modules needing a qualified 2A buck, the pin-compatible AEC-Q100 TPS54202HDDCR variant drops onto the same SOT-23-6 footprint, enabling one PCB design across industrial and automotive builds. The 28V input covers 12V battery rails including load-dump clamped conditions with a TVS; 500kHz operation keeps filter components compact for infotainment, telematics, and body-control auxiliary supplies.
推荐
Portable and Test Instruments
Handheld meters and portable instruments benefit from the TPS54202DDCR's tiny 2.9mm x 2.9mm-class SOT-23-6 footprint and minimal external count - typically one inductor plus 10uF input and 22uF output ceramic capacitors. Internal compensation and soft start shorten design time, and the 0.596V feedback reference enables low-voltage processor rails. Thermal performance supports 2A bursts without heatsinking in enclosed handheld form factors.
推荐
Set-Top Box and Consumer Media Power
Consumer media devices convert external 12V adapters to multiple low-voltage rails. The TPS54202DDCR provides the main 3.3V/5V rail at 2A with high full-load efficiency from integrated synchronous MOSFETs, while Eco-mode meets standby power codes. Fixed 500kHz switching keeps ripple above the AM band edge and simplifies EMI filtering on cost-sensitive two-layer consumer PCBs.
推荐
推荐产品汇总
工程参考数据： TPS54202DDCR ——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 | TPS542021DDCR | TPS54202HDDCR | TPS54302DDCRQ1 | TPS561201DDCR | RT8299A |
|---|---|---|---|---|---|---|
| Package | SOT-23-6 Thin (DDC) | SOT-23-6 Thin (DDC) - same | SOT-23-6 Thin (DDC) - same | SOT-23-6 Thin (DDC) - same | SOT-23-6 Thin (DDC) - same | SOT-23-6 - same outline, different pinout |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Richtek |
| Input Voltage Range | 4.5 V to 28 V | 4.5 V to 30 V | 4.5 V to 28 V | 4.5 V to 28 V | 4.5 V to 17 V | 4.5 V to 32 V |
| Output Current | 2 A | 2 A | 2 A | 3 A | 1 A | 2 A |
| Switching Frequency | 500 kHz | 500 kHz | 500 kHz | 500 kHz | 1.5 MHz | 380 kHz / 800 kHz selectable |
| Automotive Grade (AEC-Q100) | No | No | Yes | Yes | No | No |
| Lifecycle Status | Active | Active (new device) | Active | Active | Active | Active |
关键差异点
- Widest input range in same-package 2A family （对比 TPS561201DDCR)
- Ultra-low standby consumption （对比 RT8299A)
- Higher current drop-in path （对比 TPS54302DDCRQ1)
设计说明
Place the 10uF input ceramic capacitor as close as possible to the VIN and GND pins, and the 22uF output capacitor directly across the inductor output to GND. Keep the SW node, BOOT capacitor, and inductor loop area minimal - these carry 500kHz square-wave current and dominate radiated EMI. Use a solid ground plane and multiple vias under the IC ground connection per TI datasheet layout guidelines.
At 24V input stepping to 3.3V at 2A, conduction and switching losses can push junction temperature significantly in the small SOT-23-6 thin package. Calculate losses from the datasheet efficiency curves for your exact operating point and verify TJ stays below 125C at maximum ambient. Increase copper area tied to GND/SW and avoid placing the part near heat sources for designs operating above roughly 1.5A continuous output.
Do not exceed the 28V absolute maximum input - add a TVS clamp on 24V industrial buses exposed to transients. When substituting pin-compatible parts such as TPS54302 (3A) or TPS561201 (1A), re-verify output capacitor stability and EN threshold because internal parameters differ despite the shared SOT-23-6 footprint. Set the feedback divider with 1% resistors; the 0.596V reference means low-value top resistors minimize FB-node noise sensitivity.
合规信息
RoHS compliant per LCSC and JLCPCB listings (part C191884). AEC-Q100 not applicable to standard grade; use TPS54202HDDCR for automotive qualification.
