LMR36015FSC3RNXTQ1 - 60V 1.5A Synchronous Buck Converter | TI
부품 번호: LMR36015FSC3RNXTQ1 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $3.67 | $3.67 |
| 10 | $3.3 | $33.00 |
| 100 | $2.95 | $295.00 |
| 500 | $2.65 | $1,325.00 |
| 1,000 | $2.4 | $2,400.00 |
| 3,000 | $2.1 | $6,300.00 |
LMR36015FSC3RNXTQ1 개요
A buck converter (also called a step-down switching regulator) is a type of switched-mode power supply (SMPS) that efficiently converts a higher DC input voltage to a lower DC output voltage by cycling an integrated power switch and storing energy in an external inductor. Within the broader taxonomy, the buck topology sits under DC-DC converters, then under switching regulators, then under power management ICs, and finally under semiconductors. The LMR36015 belongs to TI's SIMPLE SWITCHER family and is AEC-Q100 qualified for automotive environments.
Key features include peak-current-mode control for optimal efficiency and output voltage accuracy, advanced high-speed circuitry that supports 400 kHz to 2.1 MHz switching, 0.4-V typical dropout at 1.5 A load, junction temperature range from -40 C to +150 C, and 66 V input transient protection. The VQFN-HR (RNX) package enables a footprint of approximately 3 mm x 3 mm with an exposed thermal pad, suiting space-constrained PCB layouts.
The device uses peak-current-mode control, which provides cycle-by-cycle current limiting, simpler compensation, and better load-step response than voltage-mode control. Internal MOSFETs and the small package allow single-layer PCB layouts in many cases, reducing solution cost and complexity for industrial and automotive designers who need to minimize PCB area.
Typical applications include automotive infotainment and ADAS sensor rails, industrial PLC and factory automation supplies, battery-powered equipment with 12 V/24 V/48 V buses, and general-purpose 24-V industrial point-of-load conversion. The 60-V absolute-max input withstands load-dump transients typical of 12 V automotive rails.
When designing with this part, observe the minimum 400 uH to 4.7 uH inductor range, use ceramic input/output capacitors rated for the application's voltage, and ensure the exposed pad is soldered to a sufficient copper pour for thermal dissipation. A feedforward capacitor in the feedback path may be required for designs demanding optimum transient response.
This page synthesizes distributor pricing, AEC-Q100-qualified alternatives, application references, and design notes not found in the manufacturer datasheet alone, providing a single consolidated reference for engineering and procurement teams.
드롭인 대체품: LMR36015FSC3RNXTQ1 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
LMR36015FSC3RNXRQ1
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LMR36015FSC5RNXTQ1
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LMR36006RNXRQ1
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LMR33630RNXR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LMR33630RNXT
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LMR36015FSC3RNXTQ1 최대 정격 & 전기적 특성
| 토폴로지 | Synchronous Buck (Step-Down) DC-DC Converter |
| 입력 전압 범위 | 4.2 V to 60 V |
| Input Transient Tolerance | Up to 66 V |
| Output Voltage (Fixed, FSC3) | 3.3 V |
| 최대 출력 전류 | 1.5 A |
| Typical Dropout at 1.5 A | 0.4 V |
| Switching Frequency (FSC3 variant) | 2.1 MHz |
| Control Mode | Peak Current Mode |
| Integrated MOSFETs | High-side and low-side (synchronous) |
| Junction Temperature Range | -40 C to +150 C |
| 동작 온도 범위 | -40 C to +150 C |
| 패키지 | VQFN-HR (RNX), 12 pins, 3 mm x 3 mm |
| 실장 유형 | Surface Mount |
| Automotive Qualification | AEC-Q100 (Q1 suffix) |
| Pin Compatible Family | LMR36006 (60 V, 0.6 A) and LMR33620/LMR33630 (36 V, 2/3 A) |
| Functional Safety | Functional Safety-Capable documentation available |
| RoHS 상태 | Compliant |
LMR36015FSC3RNXTQ1 핀 구성
| 핀 1 | VIN — Input supply voltage (4.2 V to 60 V) |
| 핀 2 | EN — Enable input (active high) |
| 핀 3 | PGND — Power ground |
| 핀 4 | SW — Switch node (output to external inductor) |
| 핀 5 | SW — Switch node (output to external inductor) |
| 핀 6 | BST — Bootstrap capacitor for high-side gate drive |
| 핀 7 | VCC — Internal LDO output (decouple with 1 uF) |
| 핀 8 | AGND — Analog ground |
| 핀 9 | FB — Feedback (internal resistor divider for fixed Vout) |
| 핀 10 | RT/FSEL — Frequency setting resistor / fSW select |
| 핀 11 | COMP — Compensation network node |
| 핀 12 | PGOOD — Power-good open-drain output |
일반적인 애플리케이션
LMR36015FSC3RNXTQ1 적합 용도: 7 애플리케이션s: Automotive Infotainment Power Rails, Industrial 24 V PLC I/O Power, ADAS Sensor Modules (Radar / Camera), Battery-Powered Portable Equipment, Industrial Sensor / IoT Gateways, Server and Telecom Point-of-Load, Functional Safety Systems (ASIL-rated).
Automotive Infotainment Power Rails
The LMR36015FSC3RNXTQ1's 4.2 V to 60 V input withstands 12 V automotive load-dump transients up to 66 V per TI's LMR36015-Q1 datasheet, making it ideal for head-unit, telematics, and gateway power rails. The 1.5 A output covers typical 3.3 V MCU and SoC loads, and AEC-Q100 qualification plus the 3 mm x 3 mm VQFN-HR footprint suit dense automotive PCB layouts. Pair with an LC filter to meet CISPR 25 Class 5 EMI. Versus a discrete buck, the integrated MOSFETs cut BOM count and the 2.1 MHz switching shrinks inductors to 1 uH or smaller.
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Industrial 24 V PLC I/O Power
Factory PLCs and sensor hubs commonly run on 24 V nominal industrial bus rails, exactly where the LMR36015FSC3RNXTQ1's 60 V max input provides comfortable headroom for transients and surges. The fixed 3.3 V output rails directly to logic ICs and sensors at 1.5 A. Per TI's LMR36015-Q1 datasheet, peak-current-mode control gives fast load-step response critical for cyclic industrial loads. The AEC-Q100 grade adds robustness margin for outdoor cabinets and machinery.
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ADAS Sensor Modules (Radar / Camera)
Radar and camera ADAS modules need compact, low-noise 3.3 V rails at 1-1.5 A. The LMR36015FSC3RNXTQ1's 2.1 MHz switching keeps the converter above the AM band, easing EMI compliance, while its AEC-Q100 grade supports under-hood placement. The 0.4 V dropout at full 1.5 A load means even cold-crank events stay regulated. Pin-compatible scalability lets designers use the same LMR36006 footprint on lower-power siblings. Place a pi filter on the output rail to clean switching ripple from serializer rails.
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Battery-Powered Portable Equipment
Portable test gear, handheld scanners, and battery backup systems running from 12 V to 48 V lithium packs benefit from the LMR36015FSC3RNXTQ1's 4.2 V to 60 V input range and 1.5 A output. The 3 mm x 3 mm VQFN-HR package plus 2.1 MHz switching enable single-layer PCB implementations with sub-1 uH inductors. Per the TI LMR36015-Q1 datasheet, the SS/TR pin supports adjustable soft-start to coordinate with battery management ICs. Compared with an LDO at high VIN-VOUT deltas, switching topology preserves battery life and efficiency.
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Industrial Sensor / IoT Gateways
Industrial IoT gateways aggregate sensor data from 24 V plant buses and need a rugged, small-footprint buck for 3.3 V logic rails. The LMR36015FSC3RNXTQ1's wide VIN range accommodates PoE-derived 48 V and unregulated industrial 24 V with no upstream preregulator. The fixed 3.3 V output eliminates feedback components, reducing BOM and PCB area. AEC-Q100 qualification supports outdoor enclosures, while the exposed thermal pad provides adequate heat spreading at 1.5 A continuous load.
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Server and Telecom Point-of-Load
Server and telecom boards stepping down from 48 V backplanes to 3.3 V logic rails can use the LMR36015FSC3RNXTQ1 where per-rail current is under 1.5 A. The 60 V input rating covers 48 V nominal with ample transient margin; the integrated MOSFETs minimize parasitic inductance in high-density layouts. Per TI's LMR36015-Q1 datasheet, the 2.1 MHz switching reduces output ripple and allows small ceramic-only output capacitors. Pin-compatibility with LMR33620/30 lets designers reuse layout for adjacent rails.
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Functional Safety Systems (ASIL-rated)
The LMR36015FSC3RNXTQ1 supports functional safety designs with TI-provided FMEDA and safety manuals per IEC 61508 and ISO 26262. Its integrated protection features - cycle-by-cycle current limit, thermal shutdown, and input UVLO - reduce diagnostic complexity in safety-critical ADAS and chassis electronics. The 3.3 V fixed output, 1.5 A continuous rating, and AEC-Q100 grade align with ASIL-B target systems such as EPS, brake controllers, and sensor fusion ECUs. Designers should consult TI's safety manual for fault-coverage assumptions.
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추천 제품 요약
엔지니어링 참조 데이터: LMR36015FSC3RNXTQ1 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | LMR36015FSC3RNXRQ1 | LMR36015FSC5RNXTQ1 | LMR36006RNXRQ1 | LMR33630RNXR | LMR33630RNXT |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VQFN-HR (RNX), 12-pin | VQFN-HR (RNX), 12-pin - same | VQFN-HR (RNX), 12-pin - same | VQFN-HR (RNX), 12-pin - same | VQFN-HR (RNX), 12-pin - same | VQFN-HR (RNX), 12-pin - same |
| Input Voltage Range | 4.2 V to 60 V | 4.2 V to 60 V | 4.2 V to 60 V | 4.2 V to 60 V | 4.0 V to 36 V | 4.0 V to 36 V |
| Output Voltage (fixed) | 3.3 V | 3.3 V | 5.0 V | 3.3 V (per family variant) | 3.3 V (per family variant) | 3.3 V (per family variant) |
| Maximum Output Current | 1.5 A | 1.5 A | 1.5 A | 0.6 A | 3.0 A | 3.0 A |
| Switching Frequency | 2.1 MHz | 2.1 MHz | 2.1 MHz | 2.1 MHz | 2.1 MHz | 2.1 MHz |
| Automotive Grade (AEC-Q100) | Yes | Yes | Yes | Yes | No (LMR33630 non-Q1) | No (LMR33630 non-Q1) |
주요 차별점
- 60 V absolute-max input with 66 V transient tolerance (vs LMR33630RNXR)
- 1.5 A continuous current at 2.1 MHz switching (vs LMR36006RNXRQ1)
- AEC-Q100 qualified with functional safety documentation (vs LMR33630RNXR)
- Integrated high-side and low-side MOSFETs (vs LMR33620 / LMR33630)
설계 노트
Place input capacitors as close as possible to the VIN and PGND pins of the VQFN-HR (RNX) package, using the exposed thermal pad for ground and heat dissipation. Use wide copper pours on VIN, SW, and PGND traces to minimize parasitic inductance. Per TI's LMR36015-Q1 datasheet, single-sided PCB layouts are feasible due to the package pinout, but double-sided designs improve thermal performance for continuous 1.5 A operation.
Estimated: At VIN = 24 V, VOUT = 3.3 V, and IOUT = 1.5 A, switching power dissipation is roughly (24 - 3.3) x 1.5 x (1 - efficiency)/efficiency. With ~85% efficiency, internal dissipation is about 4.3 W. The 3 mm x 3 mm VQFN-HR package with adequate copper pour keeps junction temperature rise manageable; a 1 square inch top-side copper pour typically keeps the device within -40 C to +150 C at 1.5 A continuous load. Use thermal vias to inner planes for higher ambient temperature applications.
Do not exceed 66 V input transients; clamp automotive load-dump events above this level. The BST capacitor must be placed near the BST pin and use a 0.1 uF ceramic rated for the SW voltage plus margin. For the fixed-output FSC3 variant, leave the FB pin open or follow TI's reference layout - do not add external feedback resistors, which will fight the internal divider. Soft-start capacitor selection on SS/TR sets startup inrush and must match the upstream supply's current limit.
Keep the SW node trace short and surrounded by PGND copper to reduce radiated EMI. Place the bootstrap capacitor return trace directly to the SW pin and BST pin, not to PGND. For CISPR 25 EMI compliance in automotive designs, use a pi-filter (LC) on the input and a ferrite bead or LC filter on the output. The exposed pad must be soldered to a continuous ground plane for thermal and electrical performance; missing or partial solder coverage degrades both.
규정 준수 정보
AEC-Q100 qualified per the Q1 suffix; Functional Safety-Capable documentation available from TI. RoHS and REACH compliant per TI product page. Lead-free and halogen-free per package markings.
