LM76005RNPR - 60V 5A Sync Step-Down Converter | Texas Instruments
料号： LM76005RNPR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： LM76005RNPR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LM76005RNPR （相同外形与封装尺寸） ——差异在于 Mounting Type, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
LM76005QRNPRQ1
✅ 直接替换📋 参考替代料（不在目录中）
LM76003RNPR
✅ 直接替换📋 参考替代料（不在目录中）
LM76002RNPR
✅ 直接替换📋 参考替代料（不在目录中）
LM76003QRNPRQ1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LM76005RNPR 最大额定值与电气特性
| 拓扑 | Synchronous Buck (Step-Down) |
| 输入电压范围 | 3.5 V to 60 V |
| Input Voltage Transient Tolerance | 65 V |
| 最大输出电流 | 5 A |
| 输出电压范围 | 1 V to 95% of VIN |
| Quiescent Current (Regulation) | 15 µA |
| 开关频率 | 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 |
| 软启动 | 6.3 ms default, adjustable |
| 封装 | WQFN-30 (RNP) 4x6 mm with exposed pad |
| 安装类型 | Surface Mount |
| 工作温度范围 | -40 °C to +125 °C |
| MSL 等级 | 2 |
| RoHS 状态 | Compliant |
| Functional Safety | Documentation available (Functional Safety-Capable) |
LM76005RNPR 引脚配置
| 引脚 1 | AGND — Analog ground |
| 引脚 2 | FB — Feedback input to internal error amplifier |
| 引脚 3 | COMP — Compensation network node |
| 引脚 4 | RT/SYNC — Resistor timing / external clock sync |
| 引脚 5 | SS — Soft-start control |
| 引脚 6 | EN/UVLO — Enable and undervoltage lockout |
| 引脚 7 | PGOOD — Power-good indicator output |
| 引脚 8 | VIN — Input supply voltage |
| 引脚 9 | VIN — Input supply voltage |
| 引脚 10 | VIN — Input supply voltage |
| 引脚 11 | BST — Bootstrap supply for high-side gate driver |
| 引脚 12 | SW — Switch node (connected to internal LSFET and HSFET) |
| 引脚 13 | SW — Switch node |
| 引脚 14 | SW — Switch node |
| 引脚 15 | SW — Switch node |
| 引脚 16 | PGND — Power ground |
| 引脚 17 | PGND — Power ground |
| 引脚 18 | PGND — Power ground |
| 引脚 19 | PGND — Power ground |
| 引脚 20 | PGND — Power ground |
| 引脚 21 | PGND — Power ground |
| 引脚 22 | PGND — Power ground |
| 引脚 23 | PGND — Power ground |
| 引脚 24 | PGND — Power ground |
| 引脚 25 | PGND — Power ground |
| 引脚 26 | PGND — Power ground |
| 引脚 27 | PGND — Power ground |
| 引脚 28 | PGND — Power ground |
| 引脚 29 | NC — Not connected (per datasheet) |
| 引脚 30 | PGND — Power ground / exposed thermal pad |
典型应用
LM76005RNPR 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： LM76005RNPR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Wide 60 V input with 65 V transient tolerance （对比 TPS54360)
- Pin-compatible 5A/3.5A/2.5A family （对比 TPS54560B)
- Automotive-grade drop-in equivalent （对比 LM76005QRNPRQ1)
设计说明
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.
合规信息
RoHS compliant per TI product page. Industrial grade; for AEC-Q100 automotive, use LM76005QRNPRQ1. Halogen-free status not explicitly stated in the verified data.
