TPS62177DQCT - 28V, 0.5A Buck Converter with SNOOZE | TI
N.º da peça: TPS62177DQCT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.45 | $24,50 |
| 100 | $2.05 | $205,00 |
| 500 | $1.78 | $890,00 |
| 1.000 | $1.55 | $1.550,00 |
TPS62177DQCT Visão geral
Key features include a 4.8 uA quiescent current in SNOOZE (sleep) mode, 100% duty-cycle operation for low-dropout regulation, an active output-discharge resistor, a power-good indicator, and a switching frequency of typically 1MHz that allows the use of small inductors and ceramic capacitors. The exposed thermal pad of the WSON-10 package enables sustained 500mA delivery with minimal PCB copper area.
The TPS6217x family uses TI's DCS-Control (Direct Control with Seamless transition into Power Save Mode) topology, which combines PWM at moderate-to-heavy loads with automatic power-save mode at light loads to keep efficiency high across the entire load curve. The result is high efficiency at 500mA and very low quiescent current at micro-amp standby levels, which matters for battery-powered industrial sensors and always-on IoT nodes.
Typical applications include multi-cell Li-Ion powered portable and industrial equipment, 12V/24V bus regulation for factory automation and metering, low-power wireless sensor nodes, USB-powered and battery-backed systems, and any point-of-load supply that needs a clean 3.3V rail from a wide input.
When designing with this part, place input capacitors close to PVIN and PGND, use a 1uH to 2.2uH shielded inductor at the SW node, and connect the exposed pad to a continuous ground plane for thermal relief. The PG (power-good) pin can be left open if sequencing is not required.
Alternativas drop-in para TPS62177DQCT — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com TPS62177DQCT (mesmo formato e footprint) — diferindo em Input Voltage Range, Operating Temperature Range, Output Voltage Range, Package, Power Good Output.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
TPS62177DQCR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TPS62177DQCTG4
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TPS62175DQCT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TPS62175DQCR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TPS62177DQCRQ1
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TPS62177DQCT Classificações máximas e características elétricas
| Função | Synchronous Buck (Step-Down) DC-DC Converter |
| Topologia | DCS-Control (TI proprietary) |
| Faixa de tensão de entrada | 4.75 V to 28 V |
| Output Voltage (Fixed) | 3.3 V |
| Output Current (Continuous) | 500 mA |
| Faixa de tensão de saída | Up to 6 V (programmable variants in family) |
| Switching Frequency (Typ.) | 1 MHz |
| Quiescent Current (SNOOZE Mode, Typ.) | 4.8 uA |
| Duty Cycle (Max) | 100% (low-dropout operation) |
| Output Discharge | Active (internal discharge resistor) |
| Saída Power Good | Yes (open-drain) |
| Faixa de temperatura de operação | -40 C to +85 C |
| Encapsulamento | 10-WFDFN (WSON-10, DQC) Exposed Pad |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
| Nível MSL | 2 |
| Special Mode | SNOOZE / Sleep Mode for ultra-low Iq |
Configuração de pinos do TPS62177DQCT
| Pino 1 | PGND — Power ground (return for internal synchronous rectifier) |
| Pino 2 | VIN — Input voltage supply to the converter |
| Pino 3 | EN — Enable input (active high); tie to VIN for always-on operation |
| Pino 4 | AGND — Analog ground reference for control circuitry |
| Pino 5 | FB — Feedback node; on fixed variants internally connected to VOUT |
| Pino 6 | PG — Power-good open-drain output, pulls low when VOUT out of regulation |
| Pino 7 | VOUT — Regulated output voltage (3.3V fixed for TPS62177) |
| Pino 8 | SW — Switch node - connection point for the external inductor |
| Pino 9 | PVIN — Power input voltage to the high-side FET |
| Pino 10 | EP — Exposed thermal pad; must be soldered to PCB ground plane for thermal relief |
Aplicações típicas
TPS62177DQCT é adequado para 6 aplicaçãos: Multi-Cell Li-Ion Battery Powered Equipment, 12V / 24V Industrial Bus Regulation, Low-Power Wireless Sensor Nodes, USB-Powered / Battery-Backed Systems, Point-of-Load Supply for Mixed-Signal ASICs, Automotive Accessory and Aftermarket Modules.
Multi-Cell Li-Ion Battery Powered Equipment
The TPS62177DQCT fits multi-cell Li-Ion battery powered equipment because its 4.75V to 28V input range covers 1S to 6S Li-Ion packs end-to-end without front-end regulation, and its 4.8 uA SNOOZE quiescent current preserves standby battery life when the host MCU is sleeping. With 500mA output and 100% duty-cycle low-dropout operation, the converter sustains 3.3V to the system load down to nearly the pack's cut-off voltage, maximizing usable Wh per charge. The 10-pin WSON-10 footprint keeps the total solution under 50 mm squared, which matters for handheld instruments, portable medical pumps, and field test gear where board area is at a premium.
Recomendado
12V / 24V Industrial Bus Regulation
The TPS62177DQCT is well-suited for 12V and 24V industrial bus regulation because its 28V absolute-maximum input absorbs the typical +/-10% tolerance and transient surges found on factory-bus rails, and its DCS-Control topology delivers high efficiency at the 50mA to 500mA loads typical of sensor modules, PLC interface cards, and HMI displays. The 1MHz switching frequency sits below the AM broadcast band, easing CE/EMI compliance for industrial installations. Active output discharge and the open-drain power-good flag simplify multi-rail sequencing required by modern PLC logic cores and downstream ASICs sharing the same 3.3V rail.
Recomendado
Low-Power Wireless Sensor Nodes
The TPS62177DQCT enables ultra-low-power wireless sensor nodes because its 4.8 uA SNOOZE quiescent current keeps total standby consumption at the system level dominated by the radio MCU's own sleep current, not the regulator. With 500mA peak output capability, the part can supply the high inrush demanded by sub-1GHz or BLE transmit bursts from a small decoupling capacitor bank. The exposed thermal pad sustains the average thermal load of periodic radio activity without thermal throttling, while the small WSON-10 footprint fits inside the constrained sensor-node PCB of IP67 industrial enclosures.
Recomendado
USB-Powered / Battery-Backed Systems
The TPS62177DQCT handles USB-powered and battery-backed systems because its 4.75V to 28V VIN tolerance accepts both 5V VBUS and higher battery or bus voltages without reconfiguration, and its active output discharge ensures a clean 3.3V rail ramp-down when the host removes VBUS or the battery disconnects. The 100% duty-cycle mode extends usable runtime when a 3.3V rail is sourced from a near-depleted Li-Ion cell. Power-good output enables the downstream MCU to gracefully detect brown-out events and commit its state to non-volatile memory before the rail collapses, a common requirement for industrial data loggers and medical monitoring peripherals.
Recomendado
Point-of-Load Supply for Mixed-Signal ASICs
The TPS62177DQCT provides a clean point-of-load 3.3V supply for mixed-signal ASICs because its high PSRR at 1MHz switching frequency attenuates ripple that would otherwise alias into ADC conversions and DAC output stages. The DCS-Control topology's automatic transition between PWM and power-save mode keeps efficiency high at light loads where mixed-signal ASICs spend most of their duty cycle in measurement or standby states. Active output discharge prevents voltage latch-up on shared I/O rails, and the power-good flag can be wired into the ASIC's reset network to ensure deterministic startup sequencing.
Recomendado
Automotive Accessory and Aftermarket Modules
The TPS62177DQCT serves automotive accessory and aftermarket modules because its 28V VIN tolerance covers load-dump transients up to the common 24V nominal bus plus transient headroom, and its -40C to +85C operating range spans automotive cabin and engine-bay environments. Although the TPS62177DQCT itself is not AEC-Q100 qualified, the family pinout is preserved on the AEC-Q100 automotive variant, allowing the same PCB layout to be reused between commercial and automotive SKUs. The 1MHz switching frequency and small WSON-10 footprint fit the tight packaging constraints of OBD-II dongles, telematics control units, and aftermarket infotainment accessories.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TPS62177DQCT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | TPS62177DQCR | TPS62177DQCTG4 | TPS62175DQCT | TPS62175DQCR | TPS62177DQCRQ1 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 10-WFDFN (WSON-10, DQC) Exposed Pad | 10-WFDFN (WSON-10, DQC) - same | 10-WFDFN (WSON-10, DQC) - same | 10-WFDFN (WSON-10, DQC) - same | 10-WFDFN (WSON-10, DQC) - same | 10-WFDFN (WSON-10, DQC) - same |
| Input Voltage Range | 4.75 V to 28 V | 4.75 V to 28 V | 4.75 V to 28 V | 4.75 V to 28 V | 4.75 V to 28 V | 4.75 V to 28 V |
| Output Voltage (Fixed) | 3.3 V | 3.3 V | 3.3 V | 5 V | 5 V | 3.3 V |
| Output Current | 500 mA | 500 mA | 500 mA | 500 mA | 500 mA | 500 mA |
| Switching Frequency | ~1 MHz | ~1 MHz | ~1 MHz | ~1 MHz | ~1 MHz | ~1 MHz |
| Quiescent Current (SNOOZE) | 4.8 uA typ. | 4.8 uA typ. | 4.8 uA typ. | 4.8 uA typ. | 4.8 uA typ. | 4.8 uA typ. |
| 100% Duty Cycle (LDO mode) | Yes | Yes | Yes | Yes | Yes | Yes |
| Automotive Grade (AEC-Q100) | No | No | No | No | No | Yes (AEC-Q100) |
Principais diferenciais
- Ultra-low 4.8 uA SNOOZE quiescent current with 100% duty cycle (vs TPS62175DQCT)
- Wide 28V VIN with active output discharge (vs TPS62177DQCR)
- Automotive-grade variant available in same footprint (vs TPS62177DQCRQ1)
Notas de projeto
Place the input ceramic capacitor as close as possible to the PVIN and PGND pins to minimize the high-frequency switching loop area, which directly impacts EMI and switching-node ringing. Use a 1uF to 4.7uF X7R ceramic at PVIN plus an additional 0.1uF X7R decoupling cap on the analog VIN pin. Route the SW node trace away from sensitive analog traces and keep the inductor-to-feedback-node copper short to avoid noise pickup on the regulated output.
The exposed thermal pad (EP, pin 10) MUST be soldered to a continuous PCB ground plane with multiple thermal vias to a bottom-side copper pour to achieve rated 500mA continuous output current. Estimated: at VIN=12V, VOUT=3.3V, and 500mA load the converter itself dissipates less than 0.5W (high efficiency), but VIN=24V to 3.3V at full load approaches 1W dissipation that requires adequate copper thermal relief. Refer to the TI TPS62177 datasheet layout section for the recommended land pattern.
Do not leave the EN pin floating - if unused, tie it directly to VIN through a 100k resistor or connect it directly to VIN. Leaving EN floating can cause the converter to start in an indeterminate state. Also ensure the PG (power-good) pull-up resistor is referenced to VOUT and not VIN, otherwise PG behavior is undefined during the soft-start window. Finally, do not use an inductor with a saturation current below 1A; the peak SW current can briefly reach 700-900mA during load transients.
Informações de conformidade
RoHS compliant and lead-free per TI product page. TPS62177DQCT is NOT AEC-Q100 qualified; the TPS62177DQCRQ1 variant carries AEC-Q100 qualification. Halogen-free status not explicitly stated in provided data; halogen_free set to unknown rather than assumed.
