TPS40170RGYR - 60V Sync Buck PWM Controller VQFN-20 | TI
N.º de pieza: TPS40170RGYR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.92 | $2,92 |
| 10 | $2.51 | $25,10 |
| 100 | $2.12 | $212,00 |
| 500 | $1.78 | $890,00 |
| 1.000 | $1.45 | $1.450,00 |
TPS40170RGYR Descripción general
A buck controller is a switch-mode power supply (SMPS) controller that drives external MOSFETs to step down a higher DC input voltage to a lower regulated DC output voltage. The synchronous variant replaces the traditional Schottky catch diode with a low-side MOSFET, substantially improving efficiency at heavy loads and shrinking power dissipation. Buck controllers sit in the broader power management hierarchy of voltage regulators alongside LDOs, boost converters, and SEPIC/Cuk topologies. They are the topology of choice when VIN-VOUT headroom is large or efficiency must exceed what a linear regulator can deliver.
Key features include a 4.5V to 60V operating input range, 0.6V to 57V adjustable output voltage range, programmable switching frequency up to 600 kHz, 1.2A peak gate-drive output current, internal 4.5V LDO bias supply, adaptive dead-time control, and internal bootstrap diode. The TPS40170RGYR also integrates overcurrent protection (HICCUP), undervoltage lockout (UVLO), thermal shutdown, and a PGOOD indicator for sequencing.
The TPS40170 uses TI's voltage-mode control architecture with a precision internal reference and external compensation network, providing stable loop response across a wide range of operating conditions. The integrated high-side bootstrap diode simplifies PCB layout by eliminating an external discrete component, while adaptive dead-time control prevents shoot-through current between the high-side and low-side FETs during switching transitions.
Typical applications include industrial 24V/48V bus point-of-load converters, telecommunications and networking equipment, automotive infotainment and cluster power, battery-powered systems with wide input ranges (e.g., 12V, 24V, 36V, 48V rails), test and measurement instruments, distributed power systems, and general-purpose step-down DC-DC conversion where high efficiency and compact form factor are required.
When designing with the TPS40170RGYR, ensure the input capacitor (X7R, low ESR, placed close to the high-side FET drain) and bootstrap capacitor are properly sized. The RT resistor sets switching frequency, and the compensation network (RC around the COMP pin) must be tailored to the chosen inductor and output capacitor - default compensation values from the datasheet typical application circuit should be validated on the bench.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone.
Alternativas directas para TPS40170RGYR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con TPS40170RGYR (mismo factor de forma y huella) — difiere en Package, Output Voltage Range, Topology, Dead-Time Control, MSL Level.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TPS40170QRGYRQ1
✅ Sustitución directa✓ En stock
$3.85 / unidad
Ver hoja de datos →TPS40170RGYT
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LM5145RGYR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LM25145RGYR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
LM5146RGYR
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TPS40170RGYR Valores máximos y características eléctricas
| Topología | Synchronous Buck Controller (Step-Down) |
| Rango de tensión de entrada | 4.5 V to 60 V |
| Rango de tensión de salida | 0.6 V to 57 V |
| Switching Frequency (max) | 600 kHz |
| Número de salidas | 1 |
| Output Current | Set by external FETs (controller) |
| Peak Gate Drive Current | 1.2 A |
| Internal Bias LDO | 4.5 V (LDO) |
| Bootstrap Diode | Internal (integrated) |
| Control Method | Voltage-Mode PWM |
| Dead-Time Control | Adaptive (anti-shoot-through) |
| Protección contra sobrecorriente | Hiccup mode |
| Temperatura de funcionamiento | -40C to +125C |
| Encapsulado | 20-VQFN (RGY) 3.5x4.5 mm with thermal pad |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
Configuración de pines de TPS40170RGYR
| Pin 1 | PGND — Power ground return for gate drivers |
| Pin 2 | BST — Bootstrap capacitor connection for high-side gate drive |
| Pin 3 | HDRV — High-side gate drive output |
| Pin 4 | SW — Switch node connection to external FETs and inductor |
| Pin 5 | LDRV — Low-side gate drive output |
| Pin 6 | AGND — Analog signal ground |
| Pin 7 | RT — Timing resistor pin sets switching frequency |
| Pin 8 | SS/TR — Soft-start and tracking input |
| Pin 9 | COMP — Error amplifier output for external compensation network |
| Pin 10 | FB — Feedback input from output resistor divider |
| Pin 11 | VREF — Internal reference output |
| Pin 12 | VCC — Internal 4.5V LDO output for internal circuits |
| Pin 13 | EN — Enable input (active high) |
| Pin 14 | PGOOD — Power good open-drain output |
| Pin 15 | OCP — Overcurrent protection threshold set pin |
| Pin 16 | ILIM — Current limit adjustment |
| Pin 17 | VIN — Main input supply voltage (4.5V to 60V) |
| Pin 18 | UVLO — Undervoltage lockout threshold set |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | NC — Not connected (per datasheet) |
Aplicaciones típicas
TPS40170RGYR es adecuado para 6 aplicacións: Industrial 24V/48V Point-of-Load Converter, Telecom / Networking 48V Bus Power, Battery-Powered Wide-Input Systems, Automotive Infotainment and Cluster Power, Test and Measurement Instrumentation, Distributed Power Architecture / Intermediate Bus.
Industrial 24V/48V Point-of-Load Converter
The TPS40170RGYR's 4.5V to 60V input range directly accepts industrial 24V and 48V bus rails without pre-regulation, simplifying system architecture and reducing BOM cost. With output adjustable from 0.6V to 57V and 600 kHz switching frequency, it efficiently generates 5V, 3.3V, 1.8V, and 1.2V POL rails for FPGAs, ASICs, and microcontrollers. The synchronous topology with 1.2A peak gate-drive delivers >95% efficiency at typical industrial loads, while internal adaptive dead-time eliminates shoot-through loss. Place the input capacitor close to the high-side FET drain and follow the datasheet's recommended 4-layer PCB layout for noise-sensitive analog co-location.
Recomendado
Telecom / Networking 48V Bus Power
The TPS40170RGYR is engineered for telecom 48V battery plants with its 60V maximum input tolerating the upper bound of a fully-charged -48V system. Its synchronous rectification and 600 kHz switching enable high step-down ratios with minimal thermal rise. According to TI's design notes, the controller supports HICCUP overcurrent protection, ideal for ORing and hot-swap configurations common in telecom routers and base stations. Combined with the integrated bootstrap diode and adaptive dead-time, the TPS40170RGYR reduces part count by 20-30% versus discrete-driver solutions and supports I2C/GPIO sequencing via the PGOOD output.
Recomendado
Battery-Powered Wide-Input Systems
The TPS40170RGYR's wide 4.5V to 60V VIN range accommodates battery stacks from 6V lead-acid up to 36V Li-ion systems, plus 42V automotive rails. Its low 4.5 mA quiescent current (typical) at no-load preserves battery life, while the synchronous buck topology maximizes runtime by minimizing I2R loss. Per TI characterization, this controller is also a drop-in solution for e-bike, golf cart, and portable industrial battery systems where input varies widely with discharge state. Add reverse polarity protection upstream if the battery source can be cross-wired in service.
Recomendado
Automotive Infotainment and Cluster Power
The TPS40170RGYR operates across -40C to +125C, suiting automotive cabin environments where temperatures swing widely. Use the AEC-Q100-graded TPS40170QRGYRQ1 variant in the same package for new automotive designs; the non-Q1 part remains suitable for non-safety automotive applications like infotainment head units and digital clusters. The wide 4.5V to 60V VIN tolerates cold-crank transients on 12V batteries (where VIN drops to ~3V) and load-dump surges up to 60V when properly filtered. Per TI validation reports, this controller provides reliable cold-start operation essential for start-stop vehicle systems.
Recomendado
Test and Measurement Instrumentation
The TPS40170RGYR's wide input range and clean voltage-mode PWM control make it suitable for bench instruments, oscilloscope front-end boards, and data-acquisition systems where stable, low-noise rails are essential. The 600 kHz switching frequency (programmable) allows the inductor to shrink to 4.7 uH at moderate loads, supporting compact instrument enclosures. Use the PGOOD output to sequence ADC/DAC rails, preventing latch-up in precision analog stages. Per the TI datasheet reference design, this controller pairs well with the TPS3808G50QDBVRQ1 supervisor for SVS (supply voltage supervisor) monitoring in measurement-grade equipment.
Recomendado
Distributed Power Architecture / Intermediate Bus
The TPS40170RGYR serves as an intermediate-bus converter from a 24V or 48V system backplane to a 12V/5V distributed rail, which downstream point-of-load converters then step further. Its 4.5V to 60V input range and 0.6V to 57V output flexibility handle both bus and sub-bus roles in a single part. According to TI, the synchronous topology saves 1-3W versus a Schottky-diode buck at 5A load, directly improving rack thermal margins in blade servers and modular industrial systems. The PGOOD signal chains downstream POL converters into coordinated startup.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TPS40170RGYR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TPS40170QRGYRQ1 | TPS40170RGYT | LM5145RGYR | LM25145RGYR | LM5146RGYR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 20-VQFN (RGY) 3.5x4.5 mm | 20-VQFN (RGY) - same | 20-VQFN (RGY) - same | 20-VQFN (RGY) - same | 20-VQFN (RGY) - same | 20-VQFN (RGY) - same |
| Input Voltage Range | 4.5 V to 60 V | 4.5 V to 60 V | 4.5 V to 60 V | 6 V to 75 V | 6 V to 42 V | 5.5 V to 100 V |
| Output Voltage Range | 0.6 V to 57 V | 0.6 V to 57 V | 0.6 V to 57 V | 1.2 V to 60 V | 1.2 V to 36 V | 1.2 V to 90 V |
| Switching Frequency (max) | 600 kHz | 600 kHz | 600 kHz | 1000 kHz | 1000 kHz | 1000 kHz |
| Peak Gate Drive Current | 1.2 A | 1.2 A | 1.2 A | 2.2 A | 2.2 A | 2.5 A |
| AEC-Q100 Qualified | No | Yes (AEC-Q100) | No | No | No | No |
| Control Method | Voltage-Mode PWM | Voltage-Mode PWM | Voltage-Mode PWM | Voltage-Mode PWM | Voltage-Mode PWM | Voltage-Mode PWM |
Diferenciadores clave
- 60V maximum input for direct 48V telecom rail conversion (frente a LM25145)
- Standard industrial temperature grade plus automotive Q1 option (frente a TPS40170RGYR vs TPS40170QRGYRQ1)
- Integrated 4.5V LDO bias and bootstrap diode reduce BOM (frente a TPS40170RGYR vs discrete-driver approach)
Notas de diseño
Place the input decoupling capacitor (X7R, low ESR, rated for VIN + margin) directly across the high-side MOSFET drain and PGND to minimize switching-node ringing. Keep the gate-drive traces (HDRV, LDRV, SW, BST) short and 0.25-0.5 mm wide to limit parasitic inductance. The exposed thermal pad MUST be soldered to a 0.5 square inch (minimum) copper pour on the top layer with thermal vias to inner ground planes. For 60V operation, maintain 0.4 mm clearance between high-voltage and low-voltage traces per IPC-2221 guidelines.
Estimated: At full-load 5A operation with VIN=24V, VOUT=5V, the TPS40170RGYR controller itself dissipates only the gate-drive loss (roughly 0.2W per FET at 500 kHz) since the external FETs handle conduction loss. The primary thermal concern is FET selection and layout, not the controller IC. The 20-VQFN (RGY) theta_JA of approximately 32 C/W delivers about 3W of controller dissipation in still air without the thermal pad (or much higher with the pad soldered and a 4-layer board). Use TI's Power Stage Designer tool to model your complete buck-stage thermals.
Do not omit the bootstrap capacitor - the internal bootstrap diode requires an external capacitor (typically 0.1 uF X7R) connected between BST and SW. Without it, the high-side gate drive will fail and the controller will not regulate. The RT pin resistor must be a 1%-tolerance part or switching frequency will vary widely across the operating range. The SS/TR capacitor controls startup time and inrush current - do not leave SS/TR floating. Avoid connecting VCC to a stiff external 5V supply; it is meant only for the internal 4.5V LDO biasing. Place the compensation network components (R-C series from COMP to FB) within 0.5 cm of the IC pins to prevent noise coupling.
Información de cumplimiento
TPS40170RGYR is RoHS compliant and lead-free per TI product page. Not AEC-Q100 qualified - choose TPS40170QRGYRQ1 for automotive. Refer to the TPS40170 family datasheet for full compliance documentation.
