TPS54283 - Dual 2A 300kHz Buck Converter | Texas Instruments
N.º da peça: TPS54283 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.89 | $3,89 |
| 10 | $3.46 | $34,60 |
| 100 | $2.98 | $298,00 |
| 500 | $2.52 | $1.260,00 |
| 1.000 | $2.18 | $2.180,00 |
TPS54283 Visão geral
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.
Alternativas drop-in para TPS54283 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
TPS54286PWP
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TPS54183PWP
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
TPS54383PWP
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TPS54386PWP
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
TPS54283 Classificações máximas e características elétricas
| Função | Dual non-synchronous buck converter |
| Número de saídas | 2 |
| Faixa de tensão de entrada | 4.5 V to 28 V |
| Output Current per Channel | 2 A |
| Faixa de tensão de saída | 0.8 V to 90% of VIN |
| Frequência de comutação | 300 kHz (fixed) |
| Tipo de saída | Adjustable |
| Integrated High-Side MOSFET | Yes |
| Low-Side Rectifier | External Schottky diode |
| Compensation | Internal |
| Encapsulamento / Caixa | 14-PowerTSSOP (HTSSOP-14, PWP) 4.40 mm width |
| Tipo de montagem | Surface Mount |
| Thermal Pad | Exposed PowerPAD |
| RoHS | unknown (not provided in verified data) |
Guia de Configuração de Pinos do TPS54283 14-powertssop (htssop-14, pwp) 4.40 mm width
Configuração de pinos para TPS54283 (pacote 14-powertssop (htssop-14, pwp) 4.40 mm width). Este dispositivo de potência possui terminais de gate, drain e source. Para pacotes não polarizados, consulte o datasheet do fabricante para a orientação exata do pino 1 e detalhes do footprint. Aplicações comuns incluem projeto de fontes de alimentação, acionamento de motores e comutação de cargas.
Nenhum dado detalhado de pinagem disponível para TPS54283.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
TPS54283 é adequado para 6 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TPS54283 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- Dual 2-A output capability in one 14-pin package (vs TPS54183PWP)
- Fixed 300-kHz switching with internal compensation (vs TPS54286PWP)
- Cost-optimized for 2-A dual-rail loads (vs TPS54383PWP)
Notas de projeto
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.
Informações de conformidade
Verified web data did not include compliance certificates; confirm with TI product page before claiming compliance.
