LM76005RNPR - 60V 5A Sync Step-Down Converter | Texas Instruments
MPN: LM76005RNPR ✓ AktifLM76005RNPR Ringkasan
A buck (step-down) converter is a switched-mode DC-DC topology that efficiently reduces a higher input voltage to a lower regulated output voltage by periodically storing and releasing energy through an LC filter. The LM76005RNPR belongs to the buck converter family within the broader switch-mode power supply (SMPS) hierarchy, which itself sits under DC-DC converters and the power management IC category. Synchronous variants replace the external Schottky rectifier with an integrated low-side MOSFET, improving efficiency and shrinking board area versus asynchronous designs.
Key features include a wide 3.5 V to 60 V input range (with 65 V transient tolerance for automotive load-dump survival), 15 µA quiescent current in regulation, 95% efficiency at 400 kHz (12 V IN, 5 V OUT, 2 A), 92% PFM efficiency at 10 mA load, external clock synchronization, pin-selectable FPWM mode for low-EMI operation, and an adjustable soft-start of 6.3 ms default. Functional safety documentation is available for systems targeting ISO 26262 compliance.
The device uses peak-current-mode control with internal compensation, minimizing external component count. Internal MOSFETs are optimized for low RDS(on) across the load spectrum, enabling high efficiency at both light and full loads. A precision reference provides ±1% output voltage accuracy, and seamless PWM-to-PFM transitions extend battery life in always-on applications by dropping quiescent losses.
Typical applications include industrial 24 V rail conversion, automotive infotainment and ADAS power, factory automation PLC I/O, battery-powered e-mobility systems, point-of-load regulation downstream of a higher-voltage bus, and ruggedized field equipment. The wide input range makes it especially attractive for systems exposed to wide transients such as 24 V industrial busses and 12 V automotive rails.
When designing with this part, ensure the input capacitor is sized to absorb the worst-case load-step ripple while keeping loop bandwidth stable. The exposed pad must be soldered to a continuous ground plane with thermal vias to handle up to 5 A continuous loads.
This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes not found in the manufacturer datasheet alone, supporting engineers making sourcing and second-source decisions.
Alternatif penggantian untuk LM76005RNPR — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian LM76005RNPR (sama faktor bentuk dan footprint) — berbeda di dalam Mounting Type, RoHS Status.
LM76005QRNPRQ1
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
LM76003RNPR
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
LM76002RNPR
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
LM76003QRNPRQ1
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
LM76005RNPR Rating Maksimal & Karakteristik Listrik
| Topologi | Synchronous Buck (Step-Down) |
| Rentang Tegangan Masukan | 3.5 V to 60 V |
| Input Voltage Transient Tolerance | 65 V |
| Arus Output Maximum | 5 A |
| Rentang Tegangan Output | 1 V to 95% of VIN |
| Quiescent Current (Regulation) | 15 µA |
| Frekuensi Pengganti | Up to 2.2 MHz (typ. 400 kHz, adjustable) |
| Efficiency at 400 kHz (12 VIN, 5 VOUT, 2 A) | 95% |
| PFM Efficiency at 10 mA | 92% |
| Control Mode | Peak Current Mode |
| Light-Load Operation | Seamless PWM/PFM transition, pin-selectable FPWM |
| External Clock Sync | Yes |
| Mulai Dengan Lebih Lambat | 6.3 ms default, adjustable |
| Paket | WQFN-30 (RNP) 4x6 mm with exposed pad |
| Tipe Mounting | Surface Mount |
| Rentang Suhu Kerja | -40 °C to +125 °C |
| Level MSL | 2 |
| Status RoHS | Compliant |
| Functional Safety | Documentation available (Functional Safety-Capable) |
Konfigurasi Pin LM76005RNPR
| Pin produk 1 | AGND — Analog ground |
| Pin produk 2 | FB — Feedback input to internal error amplifier |
| Pin produk 3 | COMP — Compensation network node |
| Pin produk 4 | RT/SYNC — Resistor timing / external clock sync |
| Pin produk 5 | SS — Soft-start control |
| Pin produk 6 | EN/UVLO — Enable and undervoltage lockout |
| Pin produk 7 | PGOOD — Power-good indicator output |
| Pin produk 8 | VIN — Input supply voltage |
| Pin produk 9 | VIN — Input supply voltage |
| Pin produk 10 | VIN — Input supply voltage |
| Pin produk 11 | BST — Bootstrap supply for high-side gate driver |
| Pin produk 12 | SW — Switch node (connected to internal LSFET and HSFET) |
| Pin produk 13 | SW — Switch node |
| Pin produk 14 | SW — Switch node |
| Pin produk 15 | SW — Switch node |
| Pin produk 16 | PGND — Power ground |
| Pin produk 17 | PGND — Power ground |
| Pin produk 18 | PGND — Power ground |
| Pin produk 19 | PGND — Power ground |
| Pin produk 20 | PGND — Power ground |
| Pin produk 21 | PGND — Power ground |
| Pin produk 22 | PGND — Power ground |
| Pin produk 23 | PGND — Power ground |
| Pin produk 24 | PGND — Power ground |
| Pin produk 25 | PGND — Power ground |
| Pin produk 26 | PGND — Power ground |
| Pin produk 27 | PGND — Power ground |
| Pin produk 28 | PGND — Power ground |
| Pin produk 29 | NC — Not connected (per datasheet) |
| Pin produk 30 | PGND — Power ground / exposed thermal pad |
Aplikasi Umum
LM76005RNPR cocok untuk 6 aplikasis: Industrial 24 V Rail Conversion, Automotive Infotainment and ADAS Power, Factory Automation PLC I/O, Battery-Powered E-Mobility Systems, Point-of-Load (POL) Regulators, Ruggedized Field Equipment.
Industrial 24 V Rail Conversion
The LM76005RNPR is well-suited to 24 V industrial rail conversion because its 3.5 V to 60 V input range directly accepts nominal 24 V supplies while tolerating transients up to 65 V from inductive load switching. At 400 kHz switching with 12 V IN and 5 V OUT, efficiency reaches 95%, reducing heatsinking in sealed PLC and sensor housings. The 15 µA quiescent current in regulation extends battery life in remote telemetry units powered from 24 V industrial busses. Designers should size the input capacitor for the worst-case step-down ratio and ensure the exposed pad is soldered to a continuous ground plane with thermal vias to handle 5 A continuous loads.
Direkomendasikan
Automotive Infotainment and ADAS Power
The LM76005RNPR's 65 V transient tolerance and wide 3.5 V to 60 V input survive automotive load-dump events on 12 V batteries, making it a strong candidate for infotainment head-unit rails and ADAS sensor power. For AEC-Q100-qualified systems, the LM76005QRNPRQ1 is the drop-in automotive equivalent, which simplifies ISO 26262 functional-safety documentation. The 95% efficiency at 400 kHz and seamless PWM-to-PFM transition minimize thermal rise in enclosed dashboards. Pin-selectable FPWM reduces EMI in noise-sensitive camera and radar modules, helping designers meet CISPR 25 Class 5 limits.
Direkomendasikan
Factory Automation PLC I/O
PLC I/O subsystems require robust step-down conversion from 24 V field rails to logic-level voltages such as 5 V, 3.3 V, and 1.8 V for microcontrollers, isolators, and transceivers. The LM76005RNPR's 5 A output capability supports multi-rail point-of-load distribution with peak efficiency of 95% at 400 kHz, keeping internal cabinet temperatures low. Its peak-current-mode control provides excellent transient response to motor inrush events that share the 24 V bus. The external clock synchronization feature enables frequency coordination across multiple PLC channels to avoid beat-frequency EMI issues in dense factory cabinets.
Direkomendasikan
Battery-Powered E-Mobility Systems
E-scooters, e-bikes, and light electric vehicles use 36 V to 48 V battery packs that require efficient step-down conversion to 12 V and 5 V rails for displays, controllers, and lighting. The LM76005RNPR accepts up to 60 V, covering 13S lithium packs with margin, and its 15 µA quiescent current in regulation extends standby time when the system is idle. PFM efficiency of 92% at 10 mA load preserves battery capacity during low-power sleep states typical of always-connected IoT mobility products. External clock sync helps align switching frequency with sensitive GPS or BLE SoCs that share the same PCB.
Direkomendasikan
Point-of-Load (POL) Regulators
Downstream of a higher-voltage intermediate bus, the LM76005RNPR serves as a 5 A point-of-load regulator for FPGAs, ASICs, and high-current microcontrollers. Its 1 V to 95% of VIN output range covers common core voltages from 1.0 V to 3.3 V when fed from a 5 V or 12 V bus, and its 400 kHz default switching enables small LC filter components for compact POL placement. External clock sync to the system's master clock eliminates beat tones in mixed-signal designs. The exposed pad and WQFN-30 footprint support high-density layouts typical of processor power trees.
Direkomendasikan
Ruggedized Field Equipment
Outdoor and field-deployed electronics such as utility metering, traffic controllers, and agricultural sensors face wide temperature swings and noisy 12 V to 48 V supply rails. The LM76005RNPR's -40 °C to +125 °C operating range, 65 V transient tolerance, and 15 µA quiescent current make it well-suited for solar-powered remote monitoring with intermittent load profiles. Functional-safety documentation aids compliance with utility-grade reliability standards, while the WQFN-30 package's exposed pad with thermal vias provides reliable heat extraction in enclosed IP-rated enclosures.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk LM76005RNPR — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | LM76005QRNPRQ1 | LM76003RNPR | LM76002RNPR | LM76003QRNPRQ1 |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | WQFN-30 (RNP) | WQFN-30 (RNP) - same | WQFN-30 (RNP) - same | WQFN-30 (RNP) - same | WQFN-30 (RNP) - same |
| Input Voltage Range | 3.5 V to 60 V | 3.5 V to 60 V | 3.5 V to 60 V | 3.5 V to 60 V | 3.5 V to 60 V |
| Maximum Output Current | 5 A | 5 A | 3.5 A | 2.5 A | 3.5 A |
| Quiescent Current | 15 µA | 15 µA | 15 µA | 15 µA | 15 µA |
| AEC-Q100 Qualified | No | Yes | No | No | Yes |
| Efficiency at 400 kHz (12 VIN, 5 VOUT, 2 A) | 95% | 95% | 95% | 95% | 95% |
| Functional Safety Capable | Yes | Yes | Yes | Yes | Yes |
Diferensiator Kunci
- Wide 60 V input with 65 V transient tolerance (vsTPS54360)
- Pin-compatible 5A/3.5A/2.5A family (vsTPS54560B)
- Automotive-grade drop-in equivalent (vsLM76005QRNPRQ1)
Catatan Desain
Estimated: at VIN=24 V, VOUT=5 V, IOUT=5 A, conduction loss across the internal MOSFETs plus switching losses typically dissipate 1.0 W to 1.5 W. With the WQFN-30 (RNP) package, the junction-to-ambient thermal resistance is dominated by PCB copper area on the exposed pad; per TI's datasheet, achieving theta_JA of approximately 35 C/W requires a 4-layer board with at least 1 square inch of copper tied to the thermal pad and 9 thermal vias.
Place the input ceramic bypass capacitor (typically 2.2 µF X7R) as close as possible to the VIN pins, with the PGND return connected to a continuous ground plane. The BOOT capacitor (typically 0.1 µF) must be located adjacent to the BST and SW pins. Minimize the SW node copper area to reduce EMI; use a small inductor and place output capacitors close to the inductor's load-side terminal. The exposed thermal pad must be soldered to a continuous PGND pour with multiple thermal vias for heat extraction.
Do not exceed 65 V on VIN even transiently; TI's load-dump tolerance assumes the standard ISO 7637-2 pulse, not indefinite overvoltage. Ensure the RT resistor sets the switching frequency within the 200 kHz to 2.2 MHz range; values outside this range can cause unstable operation. The SS capacitor controls startup inrush - leaving it open enables the internal 6.3 ms default, but external capacitors below 1 nF may produce sub-millisecond ramps that violate downstream load requirements.
Pin-selectable FPWM mode forces fixed-frequency operation at light loads, which avoids audible noise from PFM burst patterns and reduces low-frequency EMI harmonics at the cost of efficiency. For CISPR 25 Class 5 compliance in automotive designs, consider placing an input pi-filter (LC pi-network) close to the LM76005RNPR VIN pins, and route the SW node on an inner PCB layer surrounded by ground copper. Synchronizing to an external clock at a multiple of the AM radio band (e.g., 2.1 MHz) keeps switching harmonics away from sensitive RF bands.
Informasi Konformitas
RoHS compliant per TI product page. Industrial grade; for AEC-Q100 automotive, use LM76005QRNPRQ1. Halogen-free status not explicitly stated in the verified data.
