TPS54302DDCR - 3A 4.5-28V Sync Buck | Texas Instruments
部品番号: TPS54302DDCR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.15 | $1.15 |
| 10 | $1.03 | $10.30 |
| 100 | $0.79 | $79.00 |
| 500 | $0.55 | $275.00 |
| 1,000 | $0.42 | $420.00 |
TPS54302DDCR 概要
A synchronous buck converter is a DC-DC switching regulator in which a high-side and a low-side power FET switch alternately to convert a higher input voltage to a lower regulated output with high efficiency. It belongs to the switching regulator family within the power management IC hierarchy. Because the low-side FET replaces the Schottky diode of asynchronous converters, conduction losses drop and heavy-load efficiency improves significantly. The TPS54302 uses constant-frequency peak current-mode control at approximately 400kHz, providing fast line and load transient response and reducing required output capacitance.
Key features include 3A continuous output current, a wide 4.5V to 28V input range, and a 5ms internal soft start that limits inrush current at power-up. Advanced Eco-mode delivers high light-load efficiency, and the EMI-friendly switching-edge design reduces the need for extra filtering in noise-sensitive products such as wireless IoT gateways. The TSOT-23-6 package occupies minimal board area and supports reflow up to 260C.
Typical applications include industrial 24V and 12V rails, set-top boxes, battery-powered portable equipment, networking hardware, smart-home IoT gateways, and LED display control power. The wide input range plus 3A output make it a versatile point-of-load regulator, and the EMI-friendly design is valuable wherever RF sensitivity could be degraded by switching noise.
Design tip: place input and output ceramic capacitors close to the IC, choose a power inductor with saturation current above 3.2A, and set the output voltage with 1% tolerance resistors on the 0.596V reference. Since 28V is the maximum rating, add transient protection if input spikes above 28V are possible.
ドロップイン代替品: TPS54302DDCR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: TPS54302DDCR （同一形状・フットプリント） — 相違点: Package, Output Voltage Range, Switching Frequency, Input Voltage Range, Maximum Output Current.
クイック比較ツール — 並列比較する代替部品を選択:
TPS54202DDCR
✅ ドロップイン✓ 在庫あり
$0.12 / 個
データシートを見る →TPS54302QDDCRQ1
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$1.05 / 個
データシートを見る →ET8133
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS54302DDCR 最大定格＆電気的特性
| トポロジー | Synchronous Step-Down (Buck) |
| 入力電圧範囲 | 4.5 V to 28 V |
| 最大出力電流 | 3 A |
| Output Voltage Minimum | 0.596 V (reference) |
| 出力数 | 1 |
| スイッチング周波数 | 400 kHz |
| Control Topology | Peak Current Mode |
| Internal Soft Start | 5 ms |
| Integrated FETs | 2 switching N-channel MOSFETs |
| Light-Load Mode | Eco-mode |
| EMI Features | EMI-friendly switching edge |
| 動作温度 | -40C to +125C (TJ) |
| パッケージ | SOT-23-6 Thin (TSOT-23-6, DDC) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
TPS54302DDCR ピン構成
| ピン 1 | GND — Ground reference |
| ピン 2 | EN — Enable input for power sequencing |
| ピン 3 | BOOT — High-side FET gate-drive bootstrap (connect capacitor to SW) |
| ピン 4 | VIN — Input supply, 4.5V to 28V |
| ピン 5 | SW — Switching node to inductor |
| ピン 6 | VSENSE — Feedback input for output voltage regulation (0.596V reference) |
主な用途
TPS54302DDCR の用途: 6 件s: Industrial 24V Power Rails, Smart-Home IoT Gateways, Networking and Set-Top Equipment, Battery-Powered Portable Devices, LED Display Control Power, FPGA and SoC Point-of-Load.
Industrial 24V Power Rails
The TPS54302's 4.5V-28V input range directly accepts 24V industrial buses with margin below the 28V absolute maximum. Delivering 3A at 400kHz with integrated FETs, it converts 24V down to 5V or 3.3V logic rails for PLCs, sensors, and motor-control boards. Its peak current-mode control gives fast transient response to inductive load steps, and the EMI-friendly switching edge helps meet industrial EMC requirements without bulky filters. Choose an inductor with saturation current above 3.2A and clamp input transients that could exceed 28V.
おすすめ
Smart-Home IoT Gateways
Wireless IoT gateways combine RF front ends, MCUs, and Ethernet PHYs whose sensitivity degrades with switching noise. The TPS54302's EMI-friendly switching-edge design reduces conducted and radiated emissions at the source, easing coexistence with 2.4GHz radios. The 5ms soft start limits inrush on constrained power sources, and Eco-mode keeps light-load efficiency high during sleep-dominated duty cycles. Converting 12V or 24V adapters down to 3.3V at up to 3A, it powers SoCs and radios from one compact TSOT-23-6 device.
おすすめ
Networking and Set-Top Equipment
Routers, switches, and set-top boxes require dense point-of-load conversion from 12V front ends. The TPS54302 integrates both switching FETs and loop compensation, shrinking the regulator footprint to a few square millimeters around the TSOT-23-6 package. Its 400kHz fixed frequency allows small inductors while staying below sensitive broadcast bands. The 3A capacity covers main SoC and memory rails, and fast current-mode loop response handles the sharp load transients of streaming SoCs without large output capacitor banks.
おすすめ
Battery-Powered Portable Devices
Portable instruments and battery packs benefit from the TPS54302's wide input tolerance, which accepts 4S lithium stacks (up to 16.8V) as well as USB-C PD supplies near 20V. Eco-mode pulse-skipping preserves battery runtime at light standby loads, while the 5ms internal soft start prevents inrush spikes when hot-plugging the battery. A single TSOT-23-6 regulator plus one inductor and ceramic caps can supply a 3.3V, 3A system rail, minimizing board area in handheld enclosures.
おすすめ
LED Display Control Power
LED display panels and signage controllers need robust 5V or 3.3V rails derived from 24V wiring looms. The TPS54302 handles this 24V-to-5V conversion at up to 3A, powering gate drivers and controller logic for LED matrices. The fixed 400kHz switching keeps operation out of visible flicker frequencies and simplifies EMI qualification in installations with long cables. Peak current-mode control provides inherent cycle-by-cycle current limiting that protects the converter during LED string faults.
おすすめ
FPGA and SoC Point-of-Load
FPGAs, DSPs, and application processors require tightly regulated low-voltage cores as low as 0.596V, exactly the TPS54302 reference floor. Its accurate current-mode loop holds tight output tolerance against the sub-amp to multi-amp load transients typical of SoC power management, and the 5ms soft start supports sequenced power-up schemes controlled via the EN pin. Compared with discrete solutions, the integrated FETs and compensation remove tuning effort, letting the same layout be reused across 0.9V, 1.2V, and 1.8V rails.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TPS54302DDCR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TPS54202DDCR | TPS54302QDDCRQ1 | ET8133 |
|---|---|---|---|---|
| Package | TSOT-23-6 (DDC) | TSOT-23-6 (DDC) - same | TSOT-23-6 (DDC) - same | TSOT-23-6 (DDC) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | ETEK |
| Output Current | 3 A | 2 A | 3 A | 3 A |
| Automotive Grade | No | No | Yes (AEC-Q100) | No |
| Pin Compatibility | Reference (GND/EN/BOOT/VIN/SW/VSENSE) | Pin-to-pin | Pin-to-pin | Pin-to-pin |
主な差別化要因
- 3A output in minimal 6-pin footprint （vs TPS54202DDCR)
- EMI-friendly switching edge （vs ET8133)
- Automotive path with same die （vs TPS54302QDDCRQ1)
設計ノート
Place the input ceramic capacitor (10uF recommended) and output capacitor as close as possible to VIN and GND pins, keeping the loop from input cap through VIN, SW, inductor, and output cap tight. The BOOT capacitor must sit directly between BOOT and SW. Use the thermal pad as the main ground return with multiple vias to the ground plane - the underside pad is critical for both grounding and heat dissipation in the TSOT-23-6 package.
Select a power inductor with a saturation current above 3.2A to maintain margin over the 3A load current and account for peak current-mode ripple. For 24V-to-5V conversion at 3A, dissipate attention on input protection: 28V is the absolute maximum, so add a TVS diode if industrial 24V surges are possible. Set the output with 1% tolerance resistors since VSENSE accuracy directly scales with divider precision.
The TPS54302's EMI-friendly switching edge reduces high-frequency ringing on SW, but SW-node copper area should still be minimized to limit radiated emissions. Keep the inductor close to SW, avoid routing feedback traces near SW or inductor, and route VSENSE as a Kelvin connection to the output capacitor. This is especially important in RF-sensitive designs such as IoT gateways.
コンプライアンス情報
RoHS compliant per TI product listing. Standard TPS54302DDCR is not AEC-Q100 qualified; use TPS54302QDDCRQ1 for automotive. REACH, halogen-free, and conflict-minerals status not stated in provided data - verify on TI quality pages.
