Specifications
| Type | Description |
|---|---|
| Part Number | DRV8434 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | HTSSOP (28) 9.7 mm x 4.4 mm; VQFN (24) 4 mm x 4 mm |
| Operating Supply Voltage Range | 4.5 to 48 V; normal DC operation |
| Absolute Maximum VM Voltage | -0.3 to 50 V; over operating free-air temperature range |
| Motor Full-Scale Current | 0 to 2.5 A; xOUTx, observe power dissipation and thermal limits |
| Motor RMS Current | 0 to 1.8 A; xOUTx, observe power dissipation and thermal limits |
| Microstepping Resolution | Up to 1/256 microstepping; integrated STEP/DIR indexer |
| Interface Type | STEP/DIR; external controller manages direction and step rate |
| Current Sense Accuracy | ±4%; full-scale current accuracy |
| Sense Resistor Requirement | No external sense resistors required; integrated current sense functionality |
| Combined HS + LS RDS(ON) | 330 mΩ; VM = 24 V, TA = 25°C |
| VM Operating Supply Current | 5 mA typ, 6.5 mA max; ENABLE = 1, nSLEEP = 1, no motor load |
| VM Sleep Mode Supply Current | 2 µA typ, 4 µA max; nSLEEP = 0 |
| Sleep Time | 120 µs typ; nSLEEP = 0 to sleep mode |
| nSLEEP Reset Pulse Width | 20 µs min, 40 µs typ; nSLEEP low to clear fault |
| Wake-Up Time | 0.8 ms typ, 1.2 ms max; nSLEEP = 1 to output transition |
| Turn-On Time | 0.8 ms typ, 1.2 ms max; VM > UVLO to output transition |
| Enable Time | 5 µs typ; ENABLE = 0/1 to output transition |
| Internal Regulator Voltage | 4.75 V min, 5 V typ, 5.25 V max; no external load, 6 V < VM < 48 V |
| Internal Regulator Voltage | 4.2 V min, 4.35 V typ; no external load, VM = 4.5 V |
| STEP Signal Frequency | 0 to 500 kHz; STEP input, system bandwidth limited by motor load |
| Logic-Level Input Voltage | 0 to 5.5 V; recommended operating condition |
| VREF Voltage Range | 0.05 to 3.3 V; recommended operating condition |
| Input Logic-Low Voltage | 0 to 0.6 V; STEP, DIR, nSLEEP |
| Input Logic-High Voltage | 1.5 to 5.5 V; STEP, DIR, nSLEEP |
| Input Logic Hysteresis | 150 mV typ; STEP, DIR, nSLEEP |
| Input Logic-Low Current | -1 to 1 µA; VIN = 0 V |
| Input Logic-High Current | 100 µA max; VIN = 5 V |
| VCP Operating Voltage | VM + 5 V typ; 6 V < VM < 48 V |
| Charge Pump Switching Frequency | 360 kHz typ; VM > UVLO, nSLEEP = 1 |
| High-Side FET On Resistance | 165 mΩ typ, 200 mΩ max; TJ = 25°C, IO = -1 A |
| High-Side FET On Resistance | 250 mΩ typ, 300 mΩ max; TJ = 125°C, IO = -1 A |
| High-Side FET On Resistance | 280 mΩ typ, 350 mΩ max; TJ = 150°C, IO = -1 A |
| Low-Side FET On Resistance | 165 mΩ typ, 200 mΩ max; TJ = 25°C, IO = 1 A |
| Low-Side FET On Resistance | 250 mΩ typ, 300 mΩ max; TJ = 125°C, IO = 1 A |
| Low-Side FET On Resistance | 280 mΩ typ, 350 mΩ max; TJ = 150°C, IO = 1 A |
| Output Slew Rate | 240 V/µs typ; VM = 24 V, IO = 1 A, between 10% and 90% |
| Operating Ambient Temperature | -40 to 125°C; recommended operating condition |
| Operating Junction Temperature | -40 to 150°C; recommended operating condition |
| Storage Temperature | -65 to 150°C; absolute maximum rating |
| Junction-to-Ambient Thermal Resistance | 29.7°C/W; PWP HTSSOP, 28 pins |
| Junction-to-Ambient Thermal Resistance | 39.0°C/W; RGE VQFN, 24 pins |
| ESD Rating HBM | ±2000 V; Human-body model per ANSI/ESDA/JEDEC JS-001 |
| ESD Rating CDM | ±750 V; corner pins for PWP pins 1, 14, 15, and 28 per JEDEC JESD22-C101 |
| ESD Rating CDM | ±500 V; other pins per JEDEC JESD22-C101 |
| Protection Features | UVLO, CPUV, OCP, open-load detection, thermal shutdown, nFAULT output |
| Decay Modes | Smart tune, slow decay, mixed decay; PWM current regulation options |
| Configurable Off-Time PWM Chopping | 7 µs, 16 µs, 24 µs, or 32 µs; TOFF setting |
| Datasheet Status | request_only |
Product Overview
The device operates from a 4.5 to 48 V motor supply during normal DC operation, with an absolute maximum VM range of -0.3 to 50 V. Output current capability is specified as 0 to 2.5 A full-scale or 0 to 1.8 A RMS, provided power dissipation and thermal limits are observed. Integrated current sensing removes the need for external sense resistors and provides ±4% full-scale current accuracy.
DRV8434 package options include HTSSOP (28) at 9.7 mm x 4.4 mm and VQFN (24) at 4 mm x 4 mm. Thermal resistance is 29.7°C/W for the PWP HTSSOP package and 39.0°C/W for the RGE VQFN package. Current regulation options include smart tune, slow decay, and mixed decay, with configurable off-time PWM chopping of 7 µs, 16 µs, 24 µs, or 32 µs.
Key Features
- 4.5 to 48 V normal DC motor supply
- 0 to 2.5 A full-scale motor current
- 0 to 1.8 A RMS motor current
- Integrated STEP/DIR indexer to 1/256 microstepping
- STEP input supports 0 to 500 kHz
- Integrated current sensing with ±4% full-scale accuracy
- No external sense resistors required
- 330 mΩ combined high-side and low-side RDS(ON)
- Smart tune, slow decay, and mixed decay modes
- UVLO, CPUV, OCP, open-load, thermal shutdown, nFAULT
Typical Applications
- Stepper motor drive stages
- STEP/DIR motion-control systems
- Microstepping motor control
- Current-regulated motor outputs
- Sleep-mode motor electronics
- Fault-monitored motor drivers
Procurement Notes
When requesting a quote for DRV8434, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What supply voltage range does DRV8434 support?
DRV8434 supports a 4.5 to 48 V operating supply range for normal DC operation. Its VM absolute maximum rating is -0.3 to 50 V over the operating free-air temperature range.
Does DRV8434 require external current sense resistors?
No. DRV8434 includes integrated current sense functionality, so external sense resistors are not required. The specified full-scale current accuracy is ±4%.
What microstepping resolution is available on DRV8434?
The integrated STEP/DIR indexer supports up to 1/256 microstepping. The STEP input frequency range is 0 to 500 kHz, with system bandwidth limited by the motor load.
What protection functions are specified for DRV8434?
The device protection features listed for DRV8434 are UVLO, CPUV, OCP, open-load detection, thermal shutdown, and an nFAULT output.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 21, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.