Texas Instruments
TPS548B28RWWR - 20A 16V Sync Buck Converter | TI | Datacenter
部品番号: TPS548B28RWWR ✓ 生産中
在庫あり
1〜3営業日以内に発送
4 V to 16 V Vdss
20 A Id
7.7 mΩ Rds(on)
21-PowerVFQFN (RWW) Package
開始価格 $1
USD / 個
MOQ: 1 |
価格更新日: 2026-09-03
ボリューム価格
| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1 | $1.00 |
ℹ️ すべての価格はUSDです
TPS548B28RWWR 概要
The Texas Instruments TPS548B28 is a 2.7V to 16V input, 20A synchronous buck converter with differential remote sense, integrated MOSFETs, and a 3V internal LDO, supplied in a 21-pin PowerVFQFN (RWW) package. With an accurate ±1% 0.6V reference over the full operating junction temperature range, it delivers precise point-of-load regulation for high-current computing loads.
A synchronous buck converter is a DC-DC switching regulator that steps a higher input voltage down to a lower output voltage using two integrated switches (high-side and low-side MOSFETs) plus an external inductor. Within the power management hierarchy, the TPS548B28 belongs to the switching regulator family, positioned as a single-channel point-of-load (POL) solution between simple low-current bucks and multi-phase controllers.
Key features include a 4V to 16V input range supporting 20A continuous output without external bias, extended 2.7V operation with a 3.13V to 3.6V external bias, an output voltage range of 0.6V to 5.5V, and integrated 7.7-mΩ high-side and 2.4-mΩ low-side MOSFETs. The device offers fast load-transient response, accurate load and line regulation, Skip-mode or forced-CCM (FCCM) operation for light-load efficiency trade-offs, programmable soft start, and hiccup current limit for fault robustness.
The D-CAP3-style control architecture enables a small external component count and fast transient response with low output capacitance, well suited to space-constrained boards. The internal 3V LDO can be overridden by an external bias rail to improve efficiency at lower input voltages. Differential remote sense compensates for PCB IR drop, maintaining ±1% regulation at the load point.
Typical applications include server and storage point-of-load rails (DSP, FPGA, ASIC, and processor cores), datacenter and networking card power, and general industrial 20A-class low-voltage supplies. Reference design support is available via the TPS548B28EVM-023 evaluation module.
Design consideration: at 20A loads, minimize the SW-node copper area and optimize the input capacitor loop to control EMI; verify thermal performance since total MOSFET conduction plus switching losses concentrate in the small QFN footprint.
A synchronous buck converter is a DC-DC switching regulator that steps a higher input voltage down to a lower output voltage using two integrated switches (high-side and low-side MOSFETs) plus an external inductor. Within the power management hierarchy, the TPS548B28 belongs to the switching regulator family, positioned as a single-channel point-of-load (POL) solution between simple low-current bucks and multi-phase controllers.
Key features include a 4V to 16V input range supporting 20A continuous output without external bias, extended 2.7V operation with a 3.13V to 3.6V external bias, an output voltage range of 0.6V to 5.5V, and integrated 7.7-mΩ high-side and 2.4-mΩ low-side MOSFETs. The device offers fast load-transient response, accurate load and line regulation, Skip-mode or forced-CCM (FCCM) operation for light-load efficiency trade-offs, programmable soft start, and hiccup current limit for fault robustness.
The D-CAP3-style control architecture enables a small external component count and fast transient response with low output capacitance, well suited to space-constrained boards. The internal 3V LDO can be overridden by an external bias rail to improve efficiency at lower input voltages. Differential remote sense compensates for PCB IR drop, maintaining ±1% regulation at the load point.
Typical applications include server and storage point-of-load rails (DSP, FPGA, ASIC, and processor cores), datacenter and networking card power, and general industrial 20A-class low-voltage supplies. Reference design support is available via the TPS548B28EVM-023 evaluation module.
Design consideration: at 20A loads, minimize the SW-node copper area and optimize the input capacitor loop to control EMI; verify thermal performance since total MOSFET conduction plus switching losses concentrate in the small QFN footprint.
ドロップイン代替品: TPS548B28RWWR — 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。
クイック比較ツール — 並列比較する代替部品を選択:
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストTPS548B28RWWR 最大定格＆電気的特性
| トポロジー | Synchronous Step-Down (Buck) Converter |
| Input Voltage Range (no external bias) | 4 V to 16 V |
| Input Voltage Range (with external bias) | 2.7 V to 16 V |
| External Bias Range | 3.13 V to 3.6 V |
| 最大出力電流 | 20 A |
| 出力電圧範囲 | 0.6 V to 5.5 V |
| 基準電圧 | 0.6 V ±1% over junction temperature |
| High-Side MOSFET RDS(on) | 7.7 mΩ |
| Low-Side MOSFET RDS(on) | 2.4 mΩ |
| Remote Sense | Differential remote sense |
| Light Load Mode | Skip-mode or FCCM (selectable) |
| 電流制限 | Hiccup mode current limit |
| ソフトスタート | Programmable |
| Internal LDO | 3 V internal LDO |
| パッケージ | 21-PowerVFQFN (RWW) |
| 実装タイプ | Surface Mount |
TPS548B28RWWR ピン構成
| ピン 20 | SW — Switch node - connects to output inductor; per TI E2E forum, SW sends PWM to the inductor which maintains steady output current |
| ピン [DATA_NEEDED] | VIN — Input supply |
| ピン [DATA_NEEDED] | GND — Ground |
| ピン [DATA_NEEDED] | VOUT/SENSE — Differential remote sense inputs |
| ピン [DATA_NEEDED] | BOOT — High-side gate drive bootstrap |
| ピン [DATA_NEEDED] | EN — Enable |
| ピン [DATA_NEEDED] | SS/VSEL — Soft start / mode configuration |
| ピン [DATA_NEEDED] | BIAS/VDD — External bias input for internal LDO bypass |
主な用途
TPS548B28RWWR の用途: 3 件s: 電源管理, モーター制御, LED照明.
電源管理
TPS548B28RWWRを使用した電源回路のスイッチングとレギュレーション。
モーター制御
TPS548B28RWWRによるDC/BLDCモーターの駆動と制御。
LED照明
TPS548B28RWWRによるLEDストリングおよびアレイの駆動。
この製品に関するFAQはありません。
エンジニアリング参考データ: TPS548B28RWWR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
Choose the TPS548B28 when you need a complete 20A point-of-load buck in a single small package with remote sense for server, storage, or networking boards, and your input rail is 4V to 16V (or 2.7V-16V with external bias). Choose a controller plus discrete power stage such as the TPS53355 (30A, split-rail input) if you need more than 20A or parallel operation - the TPS548B28 does not support paralleling per TI. Choose multi-rail PMBus devices such as TPS53624 when sequencing and telemetry are required. For lower-current rails, simpler bucks like TPS54620 suffice. Verify hiccup-mode fault behavior matches your reliability requirements before finalizing.
主な差別化要因
- Differential remote sense for ±1% load-point accuracy （vs TPS53622RSBT)
- Integrated 7.7 mΩ / 2.4 mΩ MOSFETs （vs TPS53355)
- Internal 3V LDO with external bias override （vs TPS548B28EVM-023 reference configuration)
設計ノート
Keep the input capacitor to VIN/GND loop as small as possible; the 20A pulsed currents in this loop dominate EMI. Per the TI datasheet layout section, place ceramic input capacitors directly at the VIN pins and use the PowerVFQFN thermal pad with a multi-layer via array to the ground plane for heat spreading.
Conduction losses are roughly I^2 x (RDSon_HS x D + RDSon_LS x (1-D)); with 7.7 mΩ and 2.4 mΩ MOSFETs, duty cycle strongly affects thermals. At 12V-to-1V, 20A designs, evaluate switching loss and consider Skip-mode only at light load, since FCCM improves transient response for processor cores.
Do not attempt to parallel multiple TPS548B28 outputs - per TI E2E forum, the device does not support paralleling; for higher current use a controller such as TPS53355. The 4V minimum input applies without external bias; below 4V, supply a 3.13V-3.6V bias to extend operation down to 2.7V.
コンプライアンス情報
RoHS
Unknown
REACH
Unknown
AEC-Q100
鉛フリー
Unknown
ハロゲンフリー
Unknown
紛争鉱物
Unknown
Compliance data not present in provided verified web data; check TI product page for RoHS/REACH status.
データ検証日: 2026-08-29
— データはXAIPARTの部品エンジニアリングチームによって検証・管理されています
関連検索
TPS548B28 datasheet
TPS548B28RWWR price
TI TPS548B28 20A buck converter
2.7V to 16V input 20A synchronous buck regulator
21-PowerVFQFN buck converter
TPS548B28 server point of load power supply
TPS548B28 vs TPS53355
TPS548B28 drop-in replacement alternative
buy TPS548B28RWWR in stock
can TPS548B28 be used for parallel output
TPS548B28 pinout SW pin 20
20A POL regulator datacenter storage
関連部品&用語
Texas Instruments
TPS548B28
TPS548B28RWWR
TPS548B28EVM-023
synchronous buck converter
DC-DC switching regulator
point-of-load (POL)
PowerVFQFN
QFN package family
differential remote sense
FCCM
Skip-mode
hiccup current limit
D-CAP3 control
TPS53355
TPS53624
TPS53622RSBT
RoHS
server power
datacenter power
関連技術ガイド
TPS548B28RWWR：20A 16V同期降圧コンバータ — 完全選定・設計ガイド
TIのTPS548B28RWWR：2.7～16V入力、20A同期降圧コンバータ、±1% 0.6Vリファレンス、差動リモートセンス、21ピンQFN。2026-09-04時点で在庫あり。
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