TPS40170RGYR - 60V Sync Buck PWM Controller VQFN-20 | TI
부품 번호: TPS40170RGYR ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 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 개요
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.
드롭인 대체품: TPS40170RGYR — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: TPS40170RGYR (동일 폼 팩터 및 풋프린트) — 차이점: Package, Output Voltage Range, Topology, Dead-Time Control, MSL Level.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
TPS40170QRGYRQ1
✅ 드롭인✓ 재고 있음
$3.85 / 개
데이터시트 보기 →TPS40170RGYT
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LM5145RGYR
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
LM25145RGYR
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
LM5146RGYR
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
TPS40170RGYR 최대 정격 & 전기적 특성
| 토폴로지 | Synchronous Buck Controller (Step-Down) |
| 입력 전압 범위 | 4.5 V to 60 V |
| 출력 전압 범위 | 0.6 V to 57 V |
| Switching Frequency (max) | 600 kHz |
| 출력 수 | 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) |
| 과전류 보호 | Hiccup mode |
| 동작 온도 | -40C to +125C |
| 패키지 | 20-VQFN (RGY) 3.5x4.5 mm with thermal pad |
| 실장 유형 | Surface Mount |
| RoHS 상태 | Compliant |
TPS40170RGYR 핀 구성
| 핀 1 | PGND — Power ground return for gate drivers |
| 핀 2 | BST — Bootstrap capacitor connection for high-side gate drive |
| 핀 3 | HDRV — High-side gate drive output |
| 핀 4 | SW — Switch node connection to external FETs and inductor |
| 핀 5 | LDRV — Low-side gate drive output |
| 핀 6 | AGND — Analog signal ground |
| 핀 7 | RT — Timing resistor pin sets switching frequency |
| 핀 8 | SS/TR — Soft-start and tracking input |
| 핀 9 | COMP — Error amplifier output for external compensation network |
| 핀 10 | FB — Feedback input from output resistor divider |
| 핀 11 | VREF — Internal reference output |
| 핀 12 | VCC — Internal 4.5V LDO output for internal circuits |
| 핀 13 | EN — Enable input (active high) |
| 핀 14 | PGOOD — Power good open-drain output |
| 핀 15 | OCP — Overcurrent protection threshold set pin |
| 핀 16 | ILIM — Current limit adjustment |
| 핀 17 | VIN — Main input supply voltage (4.5V to 60V) |
| 핀 18 | UVLO — Undervoltage lockout threshold set |
| 핀 19 | NC — Not connected (per datasheet) |
| 핀 20 | NC — Not connected (per datasheet) |
일반적인 애플리케이션
TPS40170RGYR 적합 용도: 6 애플리케이션s: 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.
추천
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.
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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.
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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.
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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.
추천
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.
추천
추천 제품 요약
엔지니어링 참조 데이터: TPS40170RGYR — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | 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 |
주요 차별점
- 60V maximum input for direct 48V telecom rail conversion (vs LM25145)
- Standard industrial temperature grade plus automotive Q1 option (vs TPS40170RGYR vs TPS40170QRGYRQ1)
- Integrated 4.5V LDO bias and bootstrap diode reduce BOM (vs TPS40170RGYR vs discrete-driver approach)
설계 노트
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.
규정 준수 정보
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.
