LM25011QMYX/NOPBQ1 - 42V 2A Buck Regulator Q1 | TI
料号： LM25011QMYX/NOPBQ1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.7 | $47.00 |
| 100 | $4.1 | $410.00 |
| 500 | $3.65 | $1,825.00 |
| 1,000 | $3.2 | $3,200.00 |
LM25011QMYX/NOPBQ1 概述
A buck (step-down) regulator is a switching DC-DC converter that uses an internal N-channel MOSFET switch, an inductor, and a diode to efficiently reduce a higher input voltage to a lower regulated output. Within the power-management hierarchy, it belongs to the family: switching regulator -> DC-DC converter -> voltage regulator -> power management IC. The constant on-time control topology delivers near-instant transient response with no loop compensation and very low component count.
Key features include the integrated 2A N-channel buck switch, adjustable current limit enabling smaller inductors, AEC-Q100 Grade 1 qualification for -40C to +125C operation, a wide 6V-42V input range covering automotive 12V load-dump transients, and switching frequencies up to 2MHz for compact magnetics. The LM25011A variants additionally allow low-dropout operation at high switching frequency.
Technically, the COT emulator emulates resistive current-mode behavior, providing good line and load regulation and stable operation with low-ESR ceramic output capacitors. The adjustable current-limit sense resistor lets designers trade peak-current capability against inductor size, and the integrated high-side switch eliminates the external MOSFET and driver, reducing BOM count versus controller-based designs.
Typical applications include automotive 12V and 24V point-of-load supplies, industrial 24V bus regulation, LED driver front ends, and post-regulation after wide-Vin automotive modules. The Q1 grade with exposed-pad thermal design fits under-hood-adjacent modules and harsh-environment industrial systems.
Design tip: size the current-limit sense resistor for peak inductor current, not just DC load, and verify thermal performance - the exposed pad must be soldered to a ground-plane copper pour for the 2A rating to hold at elevated ambient temperatures.
直接替换替代料： LM25011QMYX/NOPBQ1 ——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： LM25011QMYX/NOPBQ1 （相同外形与封装尺寸） ——差异在于 Current Limit, Operating Temperature, Output Voltage Range, Package, Topology.
快速对比工具——选择替代料号进行并排对比：
LM25011MYX/NOPB
✅ 直接替换✓ 有现货
$2.05 / 个
查看数据手册 →LM25011Q1MY/NOPB
✅ 直接替换📋 参考替代料（不在目录中）
LM25011AMHX/NOPB
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LM25011AQ1MYX/NOPB
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LM25011QMYX/NOPBQ1 最大额定值与电气特性
| 拓扑 | Step-Down (Buck), Non-Synchronous |
| Control Topology | Constant On-Time (Current/Voltage Mode Emulation) |
| 输入电压范围 | 6 V to 42 V |
| Absolute Maximum Input Voltage | 45 V |
| 输出电压范围 | 2.51 V to 40 V |
| 最大输出电流 | 2 A |
| 输出数量 | 1 |
| 输出类型 | Adjustable |
| Switching Frequency (max) | 2000 kHz |
| Quiescent Current (typ) | 1.2 mA |
| 限流 | Adjustable |
| Internal Switch | Integrated 2-A N-Channel Buck Switch |
| 封装 | 10-HVSSOP (DGQ) Exposed Pad, 3 mm x 4.9 mm |
| 工作温度 | -40C to +125C (AEC-Q100 Grade 1) |
| Qualification | AEC-Q100 Grade 1 (Automotive) |
| 安装类型 | Surface Mount |
| 同步整流器 | No |
LM25011QMYX/NOPBQ1 引脚配置
| 引脚 1 | VIN — Input supply voltage, 6V to 42V |
| 引脚 2 | SS — Soft-start programming pin |
| 引脚 3 | FB — Feedback input from output voltage divider |
| 引脚 4 | AGND — Analog ground reference |
| 引脚 5 | CS — Current sense input for adjustable current limit |
| 引脚 6 | SGND — Power/signal ground |
| 引脚 7 | RON — On-time programming resistor, sets switching frequency |
| 引脚 8 | SW — Switch node to buck inductor |
| 引脚 9 | PGND — Power ground for internal buck switch |
| 引脚 10 | BST — Bootstrap capacitor for high-side gate drive |
| 引脚 11 | PAD — Exposed thermal pad, solder to ground plane |
典型应用
LM25011QMYX/NOPBQ1 适用于 6 应用s: Automotive 12V Point-of-Load Supply, Industrial 24V Bus Regulation, LED Driver Front End, Automotive ADAS and Cluster Power, Battery-Powered Test and Portable Instruments, Post-Regulation After Wide-Vin Automotive Modules.
Automotive 12V Point-of-Load Supply
The LM25011-Q1 converts automotive 12V battery rails (6V-42V, 45V abs max) to regulated 5V or 3.3V loads at up to 2A. Its AEC-Q100 Grade 1 qualification (-40C to +125C) and load-dump survivability make it well matched to body electronics and infotainment modules. The constant on-time control gives fast transient response to headlight or actuator load steps without loop compensation, while the adjustable current limit permits a smaller, lower-cost inductor.
推荐
Industrial 24V Bus Regulation
Industrial 24V control panels and PLC I/O modules commonly swing 18V-30V; the LM25011-Q1's 42V input ceiling provides generous headroom, and its 2.51V-40V adjustable output can directly serve 3.3V, 5V, 12V, or 24V sub-rails at up to 2A. Constant on-time operation keeps BOM count low with no external compensation network, and the integrated 2A N-channel switch removes the external MOSFET needed by controller solutions, shrinking PCB area in DIN-rail modules.
推荐
LED Driver Front End
With adjustable current limit and constant on-time current-mode emulation, the LM25011-Q1 serves as a regulated front-end supply for automotive LED strings and signage, converting 12V or 24V inputs to a stable bus feeding a dedicated LED driver. Tight peak-current control through the external sense resistor allows inductor downsizing, and 2MHz operation permits magnetics small enough for slim luminaire profiles. The exposed-pad HVSSOP package manages the 2A switch dissipation with modest copper pour.
推荐
Automotive ADAS and Cluster Power
ADAS camera/sensor modules and digital clusters need quiet, stable rails from a 12V car battery with wide transients. The LM25011-Q1 provides the primary 5V step from 12V with 42V surge tolerance and AEC-Q100 Grade 1 qualification, feeding downstream point-of-load LDOs for image sensors and processors. Its fixed-frequency-capable operation up to 2MHz keeps switching harmonics outside sensitive AM/FM bands, and adjustable current limit supports peak-load headroom for burst data processing.
推荐
Battery-Powered Test and Portable Instruments
Battery stacks from 12V lead-acid to 36V Li-ion chains fall inside the LM25011-Q1's 6V-42V input window, letting one design cover multiple battery configurations at 2A output. The 1.2mA typical quiescent current limits idle drain on battery-powered instruments, and COT control maintains regulation over widely varying input without mode changes. The compact 3mm x 4.9mm HVSSOP exposed-pad package suits handheld enclosures where board area and thermal margin are both constrained.
推荐
Post-Regulation After Wide-Vin Automotive Modules
Many automotive designs place a 60V-rated trans-regulator at the connector and follow it with a high-efficiency mid-bus converter. The LM25011-Q1 fits this second stage: converting a 6V-42V intermediate bus to the main 5V or 3.3V rail at 2A with high efficiency and simple external parts. Adjustable current limit protects against board shorts, and the wide output range (up to 40V) supports 12V display and actuator rails as well as logic supplies.
推荐
推荐产品汇总
工程参考数据： LM25011QMYX/NOPBQ1 ——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 | LM25011MYX/NOPB | LM25011Q1MY/NOPB | LM25011AMHX/NOPB |
|---|---|---|---|---|
| Package | 10-HVSSOP (DGQ) Exposed Pad | 10-HVSSOP (DGQ) - same | 10-HVSSOP (DGQ) - same | 10-HVSSOP (DGQ) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Input Voltage Range | 6 V to 42 V (45 V abs max) | 6 V to 42 V | 6 V to 42 V | 6 V to 42 V |
| Output Current | 2 A | 2 A | 2 A | 2 A |
| AEC-Q100 Grade | Grade 1 (-40C to +125C) | Not qualified (industrial) | Grade 1 | Not qualified |
| Low-Dropout Feature | No (standard LM25011 die) | No | No | Yes (LM25011A variant) |
| Switching Frequency (max) | 2000 kHz | 2000 kHz | 2000 kHz | 2000 kHz |
| Control Topology | Constant On-Time | Constant On-Time | Constant On-Time | Constant On-Time |
| Current Limit | Adjustable | Adjustable | Adjustable | Adjustable |
关键差异点
- AEC-Q100 Grade 1 automotive qualification （对比 LM25011MYX/NOPB)
- Adjustable current limit enables smaller inductor （对比 LM25011AMHX/NOPB)
- Integrated 2A N-channel buck switch with COT control （对比 TPS54360QDDARQ1)
设计说明
Solder the exposed thermal pad to a solid ground-plane copper pour with an array of thermal vias. The integrated 2A buck switch dissipates conduction and switching losses in the die, and the HVSSOP-10 rating depends entirely on the pad connection. Per TI datasheet layout guidelines, keep the SW node, bootstrap capacitor, and input ceramic capacitor loops minimal.
Size the current-limit sense resistor so peak inductor current (DC load plus half ripple) stays below inductor saturation at maximum load and minimum input voltage. Using an undersized inductor that saturates at load transients trips the current limit and can cause output droop. Refer to the design equations in TI datasheet SNVS for the CS threshold and RON frequency selection.
Do not exceed 42V continuous input (45V absolute maximum); automotive load-dump above this requires a front-end TVS or a 60V-rated stage such as TPS54360-Q1. Use low-ESR ceramic output capacitors for COT stability, and keep the FB divider resistance low enough to avoid noise pickup. Ensure AGND, PGND, and SGND tie at a single point to avoid ground-loop offsets in the CS sense path.
合规信息
AEC-Q100 Grade 1 qualified per TI product page (LM25011-Q1, -40C to +125C). NOPB suffix indicates no Pb-bearing plating. RoHS status per TI product page.
