TPS54283 - Dual 2A 300kHz Buck Converter | Texas Instruments
MPN： TPS54283 ✓ 啟用中TPS54283 概覽
What is a non-synchronous buck converter? A non-synchronous buck converter is a step-down switching regulator that uses an integrated high-side MOSFET as the control switch and an external Schottky diode as the low-side rectifier. Because the TPS54283 integrates the high-side switch, each of its two channels only needs an external Schottky diode, an inductor, and input/output capacitors. In the power management hierarchy it is: DC-DC converter -> non-synchronous buck converter -> step-down switching voltage regulator -> power management IC.
Key features include dual 2-A outputs, a wide 4.5-V to 28-V input range, adjustable output down to 0.8 V, fixed 300-kHz switching, internal compensation, and an integrated high-side MOSFET. The internal error-amplifier compensation removes the external compensation network, reducing BOM count and simplifying loop-stability design. The wide input range gives margin for 5-V, 12-V, and 24-V systems.
From a technical standpoint, the current-mode controlled converter balances inductor size, output ripple, and efficiency at 300 kHz. Because the low-side rectifier is external, a designer can optimize the Schottky diode for forward voltage and thermal behavior. The PowerPAD must be soldered to a solid ground-plane copper area to keep junction temperature within limits at full dual 2-A load.
Typical applications include broadband gateways (DSL/cable modems), IP security cameras, set-top boxes, and industrial control boards that generate a 5-V and a 3.3-V rail from a 12-V or 24-V input. The adjustable output also supports point-of-load power in consumer media devices.
When designing with the TPS54283, verify input-to-output headroom and Schottky diode rating for each channel, and use the exposed thermal pad to a large ground copper pour. Total dissipation is the combined loss of both channels, so thermal layout is critical at 2 A per output.
直接替換替代品，適用於 TPS54283 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
TPS54286PWP
✅ 直接替換📋 參考替代品（不在目錄中）
TPS54183PWP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS54383PWP
✅ 直接替換📋 參考替代品（不在目錄中）
TPS54386PWP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS54283 最大額定值與電氣特性
| 功能 | Dual non-synchronous buck converter |
| 輸出數量 | 2 |
| 輸入電壓範圍 | 4.5 V to 28 V |
| Output Current per Channel | 2 A |
| 輸出電壓範圍 | 0.8 V to 90% of VIN |
| 切換頻率 | 300 kHz (fixed) |
| 輸出類型 | Adjustable |
| Integrated High-Side MOSFET | Yes |
| Low-Side Rectifier | External Schottky diode |
| Compensation | Internal |
| 封裝 / 外殼 | 14-PowerTSSOP (HTSSOP-14, PWP) 4.40 mm width |
| 安裝類型 | Surface Mount |
| Thermal Pad | Exposed PowerPAD |
| RoHS | unknown (not provided in verified data) |
TPS54283 14-powertssop (htssop-14, pwp) 4.40 mm width 腳位配置指南
TPS54283（14-powertssop (htssop-14, pwp) 4.40 mm width 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： TPS54283.
請參閱 資料表 以查看完整腳位配置。
典型應用
TPS54283 適用於 6 應用s: Industrial Dual-Rail Power Supply, Broadband Gateway / DSL Modem Power, IP Security Camera Main Board, Set-Top Box / Media Player Power, 12-V Battery-Powered Industrial Equipment, Telecom / Networking Line Card.
Industrial Dual-Rail Power Supply
The TPS54283 is a natural fit for industrial dual-rail power supplies that convert a 24-V or 12-V bus into 5-V and 3.3-V logic rails. With a 4.5-V to 28-V input, each 2-A channel can drive MCU, FPGA, and sensor loads, while the integrated high-side MOSFET and internal compensation minimize external parts. One consideration is thermal: a 24-V to 5-V conversion at 2 A has large VIN-VOUT delta, so use a high-current Schottky diode and a large PowerPAD copper area to keep junction temperature within limits.
推薦
Broadband Gateway / DSL Modem Power
Broadband gateways need multiple clean rails from a 12-V wall adapter. The TPS54283's two 2-A channels can generate 3.3 V for the SoC and 5 V for PHY or USB peripherals. The fixed 300-kHz switching reduces EMI in unshielded plastic enclosures, and internal compensation simplifies the BOM. At 2 A per channel, place the converter near the input connector and keep output traces short to minimize ripple; overall system thermal load should also factor in the adjacent Ethernet PHY and memory components.
推薦
IP Security Camera Main Board
IP cameras powered over PoE use 48-V or 24-V to feed an intermediate 12-V rail, and the TPS54283 can then generate sensor-core and I/O rails. Its 2 A per channel covers CMOS image sensor, ISP, motor, and IR-LED auxiliary loads, while the 300-kHz switching keeps inductor size small for tight PCB form factors. Use the exposed PowerPAD to a ground pour and select a Schottky diode rated above the peak inductor current; the adjustable output also allows fine voltage trimming.
推薦
Set-Top Box / Media Player Power
In set-top boxes and media players, the TPS54283 produces 5 V and 3.3 V from a 12-V adapter. Two 2-A channels are sufficient for the main SoC, DDR memory, Wi-Fi module, and front-end tuner. Internal compensation and integrated high-side MOSFET reduce BOM count and layout risk, and the dual outputs replace two single-channel bucks. Keep the switching node area small and the BOOT capacitor close to the IC; total board dissipation should be reviewed for fanless enclosures at full 2-A load.
推薦
12-V Battery-Powered Industrial Equipment
For battery-powered industrial equipment, the TPS54283 accepts a 12-V nominal battery with input variation from 9 V to 16 V within its 4.5-V to 28-V range. Two 2-A outputs can power a host controller and actuators or I/O. At lower battery voltages the fixed 300-kHz converter still keeps high efficiency; at 4.5-V minimum input, output voltage can still be programmed down to 0.8 V. Use low-ESR ceramic caps and a Schottky diode sized for the maximum inductor ripple current.
推薦
Telecom / Networking Line Card
On telecom line cards, board space is valuable and multiple rails are needed. The TPS54283's dual 2-A outputs generate 3.3 V and 1.8 V or 2.5 V from an intermediate 12-V bus, and the integrated high-side MOSFET keeps switching cells compact. The 300-kHz frequency stabilizes EMI across the card, and internal compensation reduces tuning effort. For higher-current rails, a companion TPS54383PWP (3 A) can be used, keeping the same HTSSOP-14 footprint.
推薦
推薦產品摘要
工程參考資料，適用於 TPS54283 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TPS54286PWP | TPS54183PWP | TPS54383PWP | TPS54386PWP |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-PowerTSSOP (HTSSOP-14, PWP) | 14-PowerTSSOP - same | 14-PowerTSSOP - same | 14-PowerTSSOP - same | 14-PowerTSSOP - same |
| Output Current per Channel | 2 A | 2 A | 1 A | 3 A | 3 A |
| Switching Frequency | 300 kHz | 600 kHz | 300 kHz | 300 kHz | 600 kHz |
| Input Voltage Range | 4.5 V to 28 V | 4.5 V to 28 V | 4.5 V to 28 V | 4.5 V to 28 V | 4.5 V to 28 V |
| Output Voltage Range | 0.8 V to 90% of VIN | 0.8 V to 90% of VIN | 0.8 V to 90% of VIN | 0.8 V to 90% of VIN | 0.8 V to 90% of VIN |
| Number of Outputs | 2 | 2 | 2 | 2 | 2 |
| Compensation | Internal | Internal | Internal | Internal | Internal |
主要差異化特點
- Dual 2-A output capability in one 14-pin package (對比TPS54183PWP)
- Fixed 300-kHz switching with internal compensation (對比TPS54286PWP)
- Cost-optimized for 2-A dual-rail loads (對比TPS54383PWP)
設計說明
The TPS54283 is supplied in a 14-pin PowerTSSOP with exposed PowerPAD. At 12-V input, 3.3-V/2-A output per channel, total loss can exceed 4 W. Solder the PowerPAD to a large ground-plane copper area (at least 1 in² per channel equivalent) and add thermal vias under the pad to reduce theta_JA. Without proper thermal design, junction temperature may exceed the recommended limit at high ambient.
Place a 10-uF ceramic input capacitor near the VIN pins and a 0.1-uF BOOT capacitor close to BOOT/SW for the high-side gate drive. Use a Schottky diode rated for at least 3 A and low forward voltage, with the diode cathode close to the SW pin and anode to GND. Keep the SW node compact and away from the feedback/sense traces to reduce noise coupling.
Do not exceed 28 V on VIN, and remember the maximum output voltage is 90% of VIN, not rail-to-rail. The outputs are adjustable with an external resistor divider; use 1% resistors. Because the converter is non-synchronous, omitting the external Schottky diode will cause high dissipation and possible damage. Always verify component ratings at the actual peak inductor current.
合規資訊
Verified web data did not include compliance certificates; confirm with TI product page before claiming compliance.
