LM5176QPWPRQ1 - 55V 4-Switch Buck-Boost Controller | TI
Référence : LM5176QPWPRQ1 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 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 Présentation
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.
Alternatives de remplacement direct pour LM5176QPWPRQ1 — 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 LM5176QPWPRQ1 (même facteur de forme et même empreinte) — différant par Package, Topology.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
LM5176QPWPTQ1
✅ Remplacement direct✓ En stock
Contactez-nous pour le prix
Voir la fiche technique →LM5176QPWPR
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
LM5175QPWPRQ1
⚡ Même boîtier📋 Alternative de référence (hors catalogue)
LM5175PWPR
⚡ Même boîtier📋 Alternative de référence (hors catalogue)
LM5117QMHX/NOPB
⚡ Même boîtier ⚠️ Spécifications non vérifiées✓ En stock
$3.72 / unité
Voir la fiche technique →LM5176QPWPRQ1 Valeurs maximales et caractéristiques électriques
| Topologie | Synchronous 4-Switch Buck-Boost Controller |
| Plage de tension d'entrée | 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) |
| Fréquence de commutation | 100 kHz to 600 kHz (programmable) |
| Outputs | 1 |
| Light Load Mode | PWM / PFM |
| Boîtier | 28-HTSSOP (PWP) with PowerPAD |
| Température de fonctionnement | -40C to +125C |
| Junction Temperature | -40C to +150C |
| Automotive Qualification | AEC-Q100 qualified |
| Protection Features | Cycle-by-cycle current limit, OVP, thermal shutdown |
| Type de montage | Surface Mount |
| Applications Grade | Automotive (Q1) |
| Statut RoHS | Compliant |
Guide de configuration des broches du LM5176QPWPRQ1 28-htssop (pwp) with powerpad
Configuration des broches du LM5176QPWPRQ1 (boîtier 28-htssop (pwp) with powerpad). Ce composant de puissance comporte des bornes de grille, de drain et de source. Pour les boîtiers non polarisés, consultez la fiche technique du fabricant pour l'orientation exacte de la broche 1 et les détails de l'empreinte. Les applications courantes incluent la conception d'alimentations, la commande de moteurs et la commutation de charges.
Aucune donnée de brochage détaillée disponible pour LM5176QPWPRQ1.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
LM5176QPWPRQ1 convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LM5176QPWPRQ1 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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 |
Principaux différenciateurs
- Automotive AEC-Q100 qualified (vs LM5176QPWPR)
- True 4-switch buck-boost through VIN = VOUT (vs LM5117QMHX/NOPBQ1)
- Seamless mode transition with one control loop architecture (vs LM5175QPWPRQ1)
Notes de conception
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.
Informations de conformité
AEC-Q100 qualified per TI product page. RoHS/lead-free per distributor listings; verify REACH and halogen-free status on the TI quality portal.
