LM76005RNPR - 60V 5A Sync Step-Down Converter | Texas Instruments
Référence : LM76005RNPR ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.1 | $4,10 |
| 10 | $3.69 | $36,90 |
| 100 | $3.05 | $305,00 |
| 500 | $2.62 | $1 310,00 |
| 1 000 | $2.18 | $2 180,00 |
LM76005RNPR Présentation
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.
Alternatives de remplacement direct pour LM76005RNPR — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec LM76005RNPR (même facteur de forme et même empreinte) — différant par Mounting Type, RoHS Status.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
LM76005QRNPRQ1
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LM76003RNPR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LM76002RNPR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LM76003QRNPRQ1
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
LM76005RNPR Valeurs maximales et caractéristiques électriques
| Topologie | Synchronous Buck (Step-Down) |
| Plage de tension d'entrée | 3.5 V to 60 V |
| Input Voltage Transient Tolerance | 65 V |
| Courant de sortie maximal | 5 A |
| Plage de tension de sortie | 1 V to 95% of VIN |
| Quiescent Current (Regulation) | 15 µA |
| Fréquence de commutation | 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 |
| Démarrage progressif | 6.3 ms default, adjustable |
| Boîtier | WQFN-30 (RNP) 4x6 mm with exposed pad |
| Type de montage | Surface Mount |
| Plage de température de fonctionnement | -40 °C to +125 °C |
| Niveau MSL | 2 |
| Statut RoHS | Compliant |
| Functional Safety | Documentation available (Functional Safety-Capable) |
Configuration des broches de LM76005RNPR
| Broche 1 | AGND — Analog ground |
| Broche 2 | FB — Feedback input to internal error amplifier |
| Broche 3 | COMP — Compensation network node |
| Broche 4 | RT/SYNC — Resistor timing / external clock sync |
| Broche 5 | SS — Soft-start control |
| Broche 6 | EN/UVLO — Enable and undervoltage lockout |
| Broche 7 | PGOOD — Power-good indicator output |
| Broche 8 | VIN — Input supply voltage |
| Broche 9 | VIN — Input supply voltage |
| Broche 10 | VIN — Input supply voltage |
| Broche 11 | BST — Bootstrap supply for high-side gate driver |
| Broche 12 | SW — Switch node (connected to internal LSFET and HSFET) |
| Broche 13 | SW — Switch node |
| Broche 14 | SW — Switch node |
| Broche 15 | SW — Switch node |
| Broche 16 | PGND — Power ground |
| Broche 17 | PGND — Power ground |
| Broche 18 | PGND — Power ground |
| Broche 19 | PGND — Power ground |
| Broche 20 | PGND — Power ground |
| Broche 21 | PGND — Power ground |
| Broche 22 | PGND — Power ground |
| Broche 23 | PGND — Power ground |
| Broche 24 | PGND — Power ground |
| Broche 25 | PGND — Power ground |
| Broche 26 | PGND — Power ground |
| Broche 27 | PGND — Power ground |
| Broche 28 | PGND — Power ground |
| Broche 29 | NC — Not connected (per datasheet) |
| Broche 30 | PGND — Power ground / exposed thermal pad |
Applications typiques
LM76005RNPR convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LM76005RNPR — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- Wide 60 V input with 65 V transient tolerance (vs TPS54360)
- Pin-compatible 5A/3.5A/2.5A family (vs TPS54560B)
- Automotive-grade drop-in equivalent (vs LM76005QRNPRQ1)
Notes de conception
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.
Informations de conformité
RoHS compliant per TI product page. Industrial grade; for AEC-Q100 automotive, use LM76005QRNPRQ1. Halogen-free status not explicitly stated in the verified data.
