Texas Instruments
TPS548B28RWWR - 20A 16V Sync Buck Converter | TI | Datacenter
料号： TPS548B28RWWR ✓ 量产中
有现货
1-3 个工作日内发货
4 V to 16 V Vdss
20 A Id
7.7 mΩ Rds(on)
21-PowerVFQFN (RWW) Package
低至 $1
USD / 件
最小起订量： 1 |
价格更新于： 2026-09-03
批量定价
| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1 | $1.00 |
ℹ️ 所有价格均以 USD 计价
TPS548B28RWWR 概述
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.
TPS548B28RWWR 最大额定值与电气特性
| 拓扑 | 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 |
| 最大输出电流 | 20 A |
| 输出电压范围 | 0.6 V to 5.5 V |
| 基准电压 | 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) |
| 限流 | Hiccup mode current limit |
| 软启动 | Programmable |
| Internal LDO | 3 V internal LDO |
| 封装 | 21-PowerVFQFN (RWW) |
| 安装类型 | Surface Mount |
TPS548B28RWWR 引脚配置
| 引脚 20 | SW — Switch node - connects to output inductor; per TI E2E forum, SW sends PWM to the inductor which maintains steady output current |
| 引脚 [DATA_NEEDED] | VIN — Input supply |
| 引脚 [DATA_NEEDED] | GND — Ground |
| 引脚 [DATA_NEEDED] | VOUT/SENSE — Differential remote sense inputs |
| 引脚 [DATA_NEEDED] | BOOT — High-side gate drive bootstrap |
| 引脚 [DATA_NEEDED] | EN — Enable |
| 引脚 [DATA_NEEDED] | SS/VSEL — Soft start / mode configuration |
| 引脚 [DATA_NEEDED] | BIAS/VDD — External bias input for internal LDO bypass |
典型应用
TPS548B28RWWR 适用于 3 应用s: 电源管理, 电机控制, LED 照明.
电源管理
使用 TPS548B28RWWR 在电源电路中进行开关和稳压。
电机控制
使用 TPS548B28RWWR 驱动和控制直流/无刷直流电机。
LED 照明
使用 TPS548B28RWWR 驱动 LED 灯串和阵列。
该产品暂无常见问题。
工程参考数据： TPS548B28RWWR ——对比、设计指导和合规信息。
选型指南
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.
关键差异点
- Differential remote sense for ±1% load-point accuracy （对比 TPS53622RSBT)
- Integrated 7.7 mΩ / 2.4 mΩ MOSFETs （对比 TPS53355)
- Internal 3V LDO with external bias override （对比 TPS548B28EVM-023 reference configuration)
设计说明
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.
合规信息
RoHS
Unknown
REACH
Unknown
AEC-Q100
无铅
Unknown
无卤
Unknown
冲突矿物
Unknown
Compliance data not present in provided verified web data; check TI product page for RoHS/REACH status.
数据核验日期： 2026-08-29
——数据由 XAIPART 元器件工程团队核验和整理
相关搜索
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相关元器件 & 术语
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
相关技术指南
TPS548B28RWWR：20A 16V 同步降压转换器 — 完整选型与设计指南
TI TPS548B28RWWR：2.7–16V 输入，20A 同步降压转换器，±1% 0.6V 基准，差分远程检测，21 引脚 QFN。截至 2026-09-04 现货。
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