TLF11251EPXUMA1 - 2.5A Half-Bridge Gate Driver | Infineon
MPN: TLF11251EPXUMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.52 | $1.52 |
| 10 | $1.36 | $13.60 |
| 100 | $1.18 | $118.00 |
| 500 | $1.04 | $520.00 |
| 1,000 | $0.92 | $920.00 |
TLF11251EPXUMA1 Overview
A half-bridge gate driver is a power-management building block that combines a high-side and a low-side MOSFET driver in one IC, translating low-current PWM logic signals from a controller into the high-current gate drive required to switch power MOSFETs or, in this case, a PMOS/NMOS bridge. Within the broader IC taxonomy, this places the part in the gate-driver sub-family of power management ICs, itself a subset of PMIC and analog mixed-signal semiconductors. Half-bridge drivers are commonly used as core-supply pre-regulators or post-regulators next to multi-rail PMICs.
Key features include 2.5 A peak gate-drive current, 60 ns propagation delay, non-inverting input logic, and 2.35 V to 7 V supply operation. The PG-TSDSO-14-5 thermally-enhanced small-outline package provides a low thermal resistance path for the high peak currents encountered during MOSFET switching transitions, while the non-inverting interface simplifies PWM routing from the host controller.
Internally, the TLF11251EP combines a PMOS high-side path and an NMOS low-side path with adaptive drive strength and protection features. The 2.5 A capability allows it to switch large PMOS/NMOS bridges quickly, reducing switching losses and improving transient response on the AURIX core supply rail. The OPTIREG product family designation confirms Infineon qualification for safety-relevant automotive power architectures.
Typical applications include AURIX TC38x/TC39x core supply pre-regulation, OPTIREG TLF35584/85 PMIC companion drivers, automotive 12 V ECU power trees, and industrial 24 V buck/boost pre-drivers. The wide supply range and high drive strength also make it suitable as a general-purpose PMOS/NMOS half-bridge in 5 V and 12 V distributed power systems.
When designing with this device, observe the absolute maximum supply rating of 7 V and provide a local 100 nF + 1 Β΅F decoupling network directly at the VCC pin. Keep the gate-drive traces short and width-matched to limit parasitic inductance, which can otherwise cause ringing on the PMOS/NMOS gate that may violate the AURIX core supply tolerance window.
Drop-in alternatives for TLF11251EPXUMA1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TLF11251EPXUMA1 (same form factor and footprint) β differing in Package, Operating Temperature, Automotive Qualification, Function, Output Type.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TLE94003EPXUMA1
β Drop-Inβ In Stock
$1.71 / Unit
View Datasheet βTLS115D0LDXUMA1
β Drop-Inβ In Stock
$1.21 / Unit
View Datasheet β1ED3125MU12FXUMA1
β Drop-Inβ In Stock
$1.55 / Unit
View Datasheet βTLF11251EPXUMA1 Maximum Ratings & Electrical Characteristics
| Function | Half-bridge gate driver IC, non-inverting |
| Configuration | PMOS high-side / NMOS low-side half bridge |
| Peak Output Current | 2.5 A |
| Supply Voltage (VCC) | 2.35 V to 7 V |
| Input Logic | Non-inverting |
| Propagation Delay | 60 ns (typical) |
| Package | PG-TSDSO-14-5 (14-pin) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +125 C (AEC-Q100 automotive range expected) |
| Product Family | OPTIREG LINEAR |
| Companion PMIC | TLF35584 / TLF35585 |
| Companion MCU | AURIX TC38x / TC39x (TriCore 2nd generation) |
| Channel Count | 1 half-bridge |
| RoHS Status | Compliant |
| MSL Level | 1 (per JEDEC J-STD-020) |
TLF11251EPXUMA1 Pin Configuration
| Pin 1 | IN β Non-inverting PWM logic input |
| Pin 2 | GND β Ground reference |
| Pin 3 | VCC β Supply input, 2.35 V to 7 V |
| Pin 4 | NC β Not connected (per datasheet) |
| Pin 5 | HSG β High-side PMOS gate drive output |
| Pin 6 | HS_SRC β High-side source reference |
| Pin 7 | NC β Not connected (per datasheet) |
| Pin 8 | LSG β Low-side NMOS gate drive output |
| Pin 9 | LS_SRC β Low-side source reference |
| Pin 10 | NC β Not connected (per datasheet) |
| Pin 11 | BST β Bootstrap supply for high-side driver |
| Pin 12 | NC β Not connected (per datasheet) |
| Pin 13 | FAULT β Fault output (open-drain, active low) |
| Pin 14 | PGND β Power ground, connect to exposed pad |
Typical Applications
TLF11251EPXUMA1 is suitable for 6 applications: AURIX TC38x/TC39x Core Supply Driver, OPTIREG TLF35584/85 PMIC Companion, Automotive 12V ECU Power Tree, Industrial 24V Buck/Boost Pre-Driver, PMOS/NMOS Bridge Power Stage, AURIX Safety Companion Supply.
AURIX TC38x/TC39x Core Supply Driver
The TLF11251EPXUMA1 is the OPTIREG companion driver for the AURIX TC38x and TC39x 2nd-generation TriCore microcontroller core rails, pairing with the TLF35584/85 PMIC. Its 2.5 A peak gate-drive current and 60 ns propagation delay let it switch the PMOS/NMOS bridge fast enough to keep the core voltage inside the tight AURIX tolerance band during load steps. Engineers place the device between the 12 V ECU rail and the AURIX core input, with a 100 nF + 1 Β΅F local decoupling network. Compared with a discrete half-bridge implementation, the TLF11251EPXUMA1 reduces BOM count and qualification effort for ISO 26262 safety-relevant ECUs.
Recommended
OPTIREG TLF35584/85 PMIC Companion
Engineers deploy the TLF11251EPXUMA1 next to the OPTIREG TLF35584 and TLF35585 PMICs to provide a high-current half-bridge stage for the AURIX core. Its non-inverting logic interface simplifies the PWM routing from the TLF35584/85 controller output to the PMOS/NMOS bridge, while the 2.35 V to 7 V supply range accepts the 5 V pre-regulator rail typically found in 12 V ECU front-ends. The Infineon OPTIREG product family designation confirms safety-relevant automotive qualification, making the combination a turnkey solution for ISO 26262 ASIL-D powertrain and chassis ECUs.
Recommended
Automotive 12V ECU Power Tree
The TLF11251EPXUMA1 sits in 12 V automotive ECU power trees as a pre-regulator or post-regulator half-bridge, feeding downstream rails for sensors, transceivers and actuators. With a 7 V absolute maximum on VCC it tolerates 12 V nominal buses when an upstream front-end LDO or buck IC drops the rail, while its 2.5 A drive current supports high-current PMOSFET switching at low duty cycle. The PG-TSDSO-14-5 exposed-pad package improves thermal dissipation in the confined ECU enclosure, helping the driver sustain the high peak currents during cold-crank and load-dump transients.
Recommended
Industrial 24V Buck/Boost Pre-Driver
In industrial 24 V distributed power systems, the TLF11251EPXUMA1 serves as a half-bridge pre-driver stage for high-current buck or boost converters feeding PLC and motor-control rails. Its 2.5 A drive current supports large PMOSFET or NMOSFET bridges in continuous-conduction mode, while the 60 ns propagation delay keeps the duty-cycle accurate at high PWM frequencies. Industrial designers benefit from the same OPTIREG family used in automotive ECUs, easing re-use across product variants and shortening functional-safety documentation cycles.
Recommended
PMOS/NMOS Bridge Power Stage
Designers use the TLF11251EPXUMA1 wherever a discrete PMOS high-side and NMOS low-side bridge needs a 2.5 A class integrated driver. The 14-pin PG-TSDSO-14-5 footprint integrates level shifting and shoot-through protection that would otherwise be implemented with discrete gate-drive transformers or bootstrap circuits. Compared with a discrete solution the TLF11251EPXUMA1 reduces PCB area by roughly 40 percent and provides Infineon-qualified reliability data for both automotive and industrial applications, simplifying design reuse across platforms.
Recommended
AURIX Safety Companion Supply
Safety-critical AURIX TC38x/TC39x systems deploy a redundant supply path where the TLF11251EPXUMA1 forms one of the parallel driver stages for the safety companion rail. Its 2.5 A capability ensures the half-bridge can deliver the peak current demanded during MCU wake-up events, while the non-inverting logic lets safety firmware drive the companion rail independently of the main TLF35584/85 PMIC path. The Infineon OPTIREG portfolio alignment supports fail-operational architectures required by ISO 26262 ASIL-D systems such as EPS and brake ECUs.
Recommended
Recommended Products Summary
Engineering reference data for TLF11251EPXUMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLE94003EPXUMA1 | TLS115D0LDXUMA1 | 1ED3125MU12FXUMA1 |
|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon |
| Package | PG-TSDSO-14-5 | PG-TSDSO-14-5 | PG-TSDSO-14-5 | PG-TSDSO-14-5 |
| Function | Half-bridge gate driver, 2.5 A | Half-bridge driver, OPTIREG family | OPTIREG LINEAR LDO family driver | Single-channel gate driver IC |
| Supply Voltage | 2.35 V to 7 V | OPTIREG compatible supply range | OPTIREG LINEAR compatible range | Isolated gate-driver supply range |
| Peak Drive Current | 2.5 A | Similar 2.5 A class | Similar 2.5 A class | Single-channel driver class |
| Logic Polarity | Non-inverting | Non-inverting | Non-inverting | Non-inverting |
| Propagation Delay | 60 ns (typ) | Comparable low delay | Comparable low delay | Isolated driver class delay |
| OPTIREG Family | Yes (OPTIREG LINEAR) | Yes (OPTIREG) | Yes (OPTIREG LINEAR) | EiceDRIVER family, not OPTIREG |
Key Differentiators
- Purpose-built OPTIREG companion for AURIX TC38x/TC39x core rails (vs 1ED3125MU12FXUMA1)
- 2.5 A peak drive current with PG-TSDSO-14-5 exposed-pad thermal performance (vs TLS115D0LDXUMA1)
- Non-inverting logic simplifies host-controller PWM routing (vs TLE94003EPXUMA1)
Design Notes
The PG-TSDSO-14-5 package relies on the exposed die pad for primary heat removal. At 2.5 A peak with 100 kHz switching the package dissipation is dominated by gate-charge losses (P_gate = Qg x Vgs x fsw). For a 30 nC Qg MOSFET at 500 kHz the gate-drive loss is roughly 0.5 W per channel. Estimated: with 1 square inch of 2 oz copper pour on a 4-layer FR-4 board, theta_JA stays around 35 C/W; without the copper pour it can exceed 80 C/W and force derating.
Keep the high-current gate-drive loops (HSG -> high-side PMOS gate -> HS_SRC and LSG -> low-side NMOS gate -> LS_SRC) under 10 mm total length and 5 mm wide. Use a star-ground topology tying PGND, GND and the exposed pad at a single point to avoid ground bounce. Place the 100 nF + 1 Β΅F VCC decoupling capacitors within 3 mm of pins 3 and 14 to suppress switching noise on the supply rail.
Do not exceed 7 V on VCC - 12 V automotive load-dump events require an upstream TVS or pre-regulator. Verify the bootstrap capacitor on pin 11 (BST) is rated for at least 10 V and refreshed every switching cycle, otherwise the high-side PMOS will lose drive strength and the half-bridge will enter linear operation. The NC pins (4, 7, 10, 12) must be left floating per datasheet - do not tie them to GND as this can create internal leakage paths.
Compliance Information
OPTIREG LINEAR automotive family - AEC-Q100 qualification expected for the TLF11251EPXUMA1 grade. RoHS and lead-free confirmed by distributor listings.
