STMicroelectronics PM8834TR

Overview

PM8834TR from STMicroelectronics is a dual independent low-side MOSFET/IGBT driver IC with 4 A peak source/sink capability per channel, CMOS/TTL-compatible inputs, independent enable control (ENABLE_1/ENABLE_2), matched propagation delays (±5 ns), and operation across 5 V–18 V supply range. It targets high-frequency switching in DC-DC converters and motor controllers where precise gate drive timing and thermal robustness (-40 °C to 125 °C) are critical.

For engineers reviewing the PM8834TR datasheet, PM8834TR pinout, PM8834TR application, or PM8834TR equivalent, key selection criteria include dual-channel enable flexibility, parallel-output capability for 8 A drive, SO8 tape-and-reel packaging, anti-cross-conduction protection, and verified thermal performance in MSOP8-EP and SO8 footprints.

Technical Context

The PM8834TR integrates two independent lateral DMOS output stages - each with typ. 1.0 Ω source (RDSON_H) and 0.7 Ω sink (RDSON_L) resistance - enabling fast switching (tR/tF ≤ 20 ns @ 2.5 nF) and matched propagation delays (tD_LH = 15–35 ns, tD_HL = 20–40 ns). Its adaptive anti-cross-conduction logic prevents shoot-through by sequencing N-DMOS and P-DMOS turn-on/off based on real-time internal state monitoring.

Input stage features TTL/CMOS-compatible thresholds (VIH = 2.2–2.5 V, VIL = 0.8–1.1 V), internal 10 µA pull-downs on PWM pins, and 100 kΩ internal pull-ups on ENABLE pins. UVLO ensures safe startup with VCC turn-on at 4.6 V (typ.) and turn-off at 3.8 V (typ.), holding outputs low until regulation is established.

Key Specifications

Pinout & Package

PM8834TR is supplied in an industry-standard SO8 package (8-pin small outline integrated circuit) with gull-wing leads and no exposed thermal pad. Pin assignments are fully defined per STMicroelectronics DS5945 Rev 7.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-side gate driver applications.

Compared with IRS2004PBF and LM5112MYX/NOPB, PM8834TR uniquely delivers dual independent enables, 18 V operation, ±5 ns delay matching, and parallel-output support - making it the only option qualified for thermally demanding, fault-tolerant, high-voltage DC-DC and motor control applications requiring hardware-level channel isolation.

Availability

PM8834TR is available at Aetrix Electronics and suitable for industrial DC-DC converters, brushless DC motor controllers, and Class-D audio amplifiers requiring stable component supply, long-term lifecycle assurance, and tape-and-reel packaging for automated SMT assembly.

Supply support for PM8834TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The PM8834TR belongs to ST's high-performance gate driver product line, engineered specifically for high-efficiency, high-reliability power conversion systems requiring precise timing, thermal resilience, and hardware-based fault containment.

FAQ

Can PM8834TR drive IGBTs as well as MOSFETs?

Yes. The PM8834TR's 4 A source/5 A sink capability, low R_DS(ON) (0.7–1.3 Ω), and wide 5–18 V VCC range make it compatible with standard and high-speed IGBTs. Its anti-cross-conduction logic and matched delays also prevent shoot-through in IGBT-based half-bridges, as confirmed in Section 6.2 of DS5945 Rev 7.

What is the minimum recommended gate resistor for safe operation?

For capacitive loads <10 nF and VCC >15 V, ST specifies a minimum 2.2 Ω external gate resistor (Section 7.1, DS5945 Rev 7). With <4.7 nF loads, Figure 5 shows progressively higher minimum values - e.g., 4.7 Ω at 2 nF - to prevent undervoltage-induced device stress and ensure SOA compliance.

Does PM8834TR support paralleling of outputs, and what layout rules apply?

Yes. Section 6.3 and Figure 4 confirm that tying PWM_1/PWM_2 and OUT_1/OUT_2 enables 8 A drive. Layout requires matched trace lengths (<1 mm skew), symmetric routing, shared ground return, and equal gate resistor placement - all validated in ST's application note AN4722 for SO8 implementations.

How does the UVLO function protect the system during power-up?

The UVLO circuit holds both outputs low until VCC reaches 4.6 V (typ.), preventing partial turn-on of power switches. During brown-out, outputs remain active until VCC falls below 3.8 V (typ.), then force discharge - eliminating shoot-through risk and ensuring deterministic startup/shutdown behavior per Section 4 and 6.1.1 of the datasheet.