LM5176QPWPRQ1 - 55V 4-Switch Buck-Boost Controller | TI
料号： LM5176QPWPRQ1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.1 | $6.10 |
| 10 | $5.52 | $55.20 |
| 25 | $5.05 | $126.25 |
| 100 | $4.35 | $435.00 |
| 250 | $3.89 | $972.50 |
| 1,000 | $3.31 | $3,310.00 |
LM5176QPWPRQ1 概述
A buck-boost controller is a type of switching regulator that steps voltage up or down as needed. The four-switch buck-boost topology uses four external MOSFETs to transition seamlessly between buck and boost operation, making it ideal where input voltage varies above and below the output, as in automotive 12 V buses during cranking and load-dump. In the power management hierarchy: buck-boost controller -> DC-DC controller -> switching regulator -> power management IC.
Key features include current-mode control in both buck and boost modes for superior load and line regulation, integrated cycle-by-cycle current limiting, output overvoltage protection, thermal shutdown, and PWM/PFM operation for improved light-load efficiency. AEC-Q100 qualification with -40C to +125C ambient operation (junction up to +150C) targets harsh automotive environments.
Architecturally, the LM5176-Q1 drives external N-channel MOSFETs, allowing designers to scale output power freely. The proprietary current-mode scheme simplifies loop compensation and delivers fast transient response, while the four-switch topology maintains high efficiency across wide input-to-output ratios.
Typical applications include automotive USB power delivery, battery-backup and holdup power supplies, industrial 12 V/24 V bus systems, LED drivers, and renewable energy interfaces. Its transient immunity keeps output regulation during automotive input disturbances.
Design with care: keep MOSFET gate-drive loops short, place high-frequency decoupling close to the IC, and select the switching frequency to balance efficiency versus component size. Tune the compensation network for stable operation across buck, boost, and buck-boost transition regions.
直接替换替代料： LM5176QPWPRQ1 ——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： LM5176QPWPRQ1 （相同外形与封装尺寸） ——差异在于 Package, Topology.
快速对比工具——选择替代料号进行并排对比：
LM5176QPWPTQ1
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →LM5176QPWPR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LM5175QPWPRQ1
⚡ 相同封装📋 参考替代料（不在目录中）
LM5175PWPR
⚡ 相同封装📋 参考替代料（不在目录中）
LM5117QMHX/NOPB
⚡ 相同封装 ⚠️ 规格未核验✓ 有现货
$3.72 / 个
查看数据手册 →LM5176QPWPRQ1 最大额定值与电气特性
| 拓扑 | Synchronous 4-Switch Buck-Boost Controller |
| 输入电压范围 | 4.2 V to 55 V |
| Absolute Maximum Input | 60 V |
| Output | Positive, regulated at/above/below VIN |
| Control Mode | Current-mode (buck and boost) |
| 开关频率 | 100 kHz to 600 kHz (programmable) |
| Outputs | 1 |
| Light Load Mode | PWM / PFM |
| 封装 | 28-HTSSOP (PWP) with PowerPAD |
| 工作温度 | -40C to +125C |
| Junction Temperature | -40C to +150C |
| Automotive Qualification | AEC-Q100 qualified |
| Protection Features | Cycle-by-cycle current limit, OVP, thermal shutdown |
| 安装类型 | Surface Mount |
| Applications Grade | Automotive (Q1) |
| RoHS 状态 | Compliant |
LM5176QPWPRQ1 28-htssop (pwp) with powerpad 引脚配置指南
LM5176QPWPRQ1（28-htssop (pwp) with powerpad 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： LM5176QPWPRQ1.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LM5176QPWPRQ1 适用于 6 应用s: Automotive USB Power Delivery, Battery Backup and Holdup Power, Industrial 12 V / 24 V Bus Power, Automotive LED Lighting Drivers, Multi-Cell Battery Powered Systems, Test and Measurement Instrument Power.
Automotive USB Power Delivery
The LM5176QPWPRQ1 regulates a stable 5 V or 9 V USB PD rail from a 12 V automotive bus that can swing from 4.2 V during cranking to above 40 V during load-dump. Its 4.2 V to 55 V input range covers the entire automotive transient envelope without input overvoltage crowbar circuits, and current-mode control delivers fast transient response when USB devices plug in. Placing the controller between the battery node and USB port with synchronous MOSFETs achieves high efficiency, and PFM mode keeps light-load standby current low for always-on ports.
推荐
Battery Backup and Holdup Power
In systems with a backup battery or supercapacitor, bus voltage can rise above or fall below the regulated rail. The four-switch buck-boost topology of the LM5176QPWPRQ1 charges and discharges the backup source while regulating the output at, above, or below the input, something neither buck nor boost alone can do. With 55 V maximum input and programmable 100-600 kHz switching, designers can balance efficiency and magnetic size. Cycle-by-cycle current limiting protects the MOSFETs during deep discharge charging of a depleted backup cell.
推荐
Industrial 12 V / 24 V Bus Power
Industrial equipment commonly runs from 12 V, 24 V, or imperfect rectified supplies with wide tolerance. The LM5176QPWPRQ1 accepts 4.2 V to 55 V, covering 12 V and 24 V buses with a single design, reducing platform variants. The -40C to +125C ambient range suits factory-floor enclosures without forced cooling. External MOSFETs let engineers scale output current from a few amps to tens of amps, and the current-mode loop compensation remains stable through buck-boost mode transitions where voltage-mode schemes often struggle.
推荐
Automotive LED Lighting Drivers
The LM5176QPWPRQ1 can regulate current into automotive LED strings where battery voltage may be below or above the required LED forward voltage. Using the FB pin with a current-sense shunt converts the buck-boost into a constant-current driver, and the 100-600 kHz frequency range allows operation above audible noise thresholds. AEC-Q100 qualification and +150C junction rating meet headlamp and daytime-running-light reliability requirements, while cycle-by-cycle current limiting protects against shorted LED strings.
推荐
Multi-Cell Battery Powered Systems
Portable and semi-portable systems powered by multi-cell lithium or lead-acid stacks see terminal voltage swing widely with state of charge. A 4-cell lithium stack spans roughly 10.4 V to 16.8 V, crossing common 12 V rails. The LM5176QPWPRQ1 regulates through this crossover seamlessly, and its PFM mode reduces losses at light standby load, extending runtime. Designers tune the switching frequency toward 400-600 kHz to shrink inductor size, important where board area is constrained.
推荐
Test and Measurement Instrument Power
Bench instruments and modular test systems often share a nominal supply whose actual voltage varies with load and cabling. The LM5176QPWPRQ1 provides a stiff intermediate rail independent of bus variation, protecting downstream sensitive analog stages. Current-mode control gives fast load transient response when instrument channels enable, and the wide 55 V input supports line-powered systems using off-the-shelf adapters. Layout care around gate-drive loops keeps switching noise below the analog floor of the measurement chain.
推荐
推荐产品汇总
工程参考数据： LM5176QPWPRQ1 ——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 | LM5176QPWPTQ1 | LM5176QPWPR | LM5175QPWPRQ1 | LM5117QMHX/NOPBQ1 |
|---|---|---|---|---|---|
| Package | 28-HTSSOP (PWP) | 28-HTSSOP (PWP) - same | 28-HTSSOP (PWP) - same | 28-HTSSOP (PWP) - same package, different pinout | HTSSOP-28 (MHC) - similar outline, different pinout |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Topology | Synchronous 4-switch buck-boost | Synchronous 4-switch buck-boost | Synchronous 4-switch buck-boost | Buck-boost (single inductor, different control) | Coupled inductor buck-boost |
| Control Mode | Current-mode (buck and boost) | Current-mode (buck and boost) | Current-mode (buck and boost) | Peak current mode | Current-mode |
| AEC-Q100 | Qualified | Qualified | Not qualified (standard grade) | Qualified | Qualified |
| Drop-in Pin Compatibility | - | Yes - pin-to-pin | Yes - pin-to-pin | No - redesign required | No - redesign required |
关键差异点
- Automotive AEC-Q100 qualified （对比 LM5176QPWPR)
- True 4-switch buck-boost through VIN = VOUT （对比 LM5117QMHX/NOPBQ1)
- Seamless mode transition with one control loop architecture （对比 LM5175QPWPRQ1)
设计说明
Keep the four MOSFET gate-drive loops as short and as small as possible; route HO1/LO1 and HO2/LO2 traces directly over their return paths (SW nodes and PGND). Place the bootstrap capacitors close to the IC. Follow the PowerPAD thermal land pattern in the TI datasheet with an array of vias to the ground plane to keep junction temperature below +150C in automotive enclosures.
Select the switching frequency between 100 kHz and 600 kHz based on the trade-off between efficiency and magnetics size. For high-current automotive designs (several amps output), lower frequencies near 200-300 kHz reduce MOSFET switching losses; for compact designs, 400-600 kHz shrinks the inductor. Verify the current-sense element rating against cycle-by-cycle current limit thresholds.
The four-switch buck-boost transitions between buck, buck-boost, and boost modes near VIN = VOUT. Tune the compensation network and verify stability across the entire transition region, not only at nominal buck and boost operating points. Also verify behavior at the 4.2 V minimum input during deep cranking conditions to avoid dropout of the regulated rail.
合规信息
AEC-Q100 qualified per TI product page. RoHS/lead-free per distributor listings; verify REACH and halogen-free status on the TI quality portal.
