STMicroelectronics PM8834

Overview

PM8834 from STMicroelectronics is a dual independent low-side MOSFET driver IC with 4 A sink/source capability per channel, CMOS/TTL-compatible inputs, and matched propagation delays (±5 ns). It operates from 5 V to 18 V supply and supports parallel output configuration for up to 8 A drive current. Used in high-frequency SMPS and Class-D amplifiers where precise gate timing and thermal robustness (-40 °C to 125 °C) are critical.

For engineers reviewing the PM8834 datasheet, PM8834 pinout, PM8834 application, or PM8834 equivalent, key selection criteria include dual enable control, SO8/MSOP8-EP package options, anti cross-conduction protection, low R_DS(on) (0.7 Ω sink / 1.0 Ω source), and verified 10–20 ns rise/fall times into 2.5 nF loads.

Technical Context

The PM8834 integrates two independent lateral DMOS output stages with adaptive anti cross-conduction logic that monitors internal N-DMOS/P-DMOS states to prevent shoot-through during PWM transitions. Each channel features TTL/CMOS-compatible input thresholds (V_IL = 0.8–1.1 V, V_IH = 2.2–2.5 V) and internal 10 µA pull-downs on PWM pins and 100 kΩ pull-ups on ENABLE pins.

Propagation delay matching (±5 ns) enables synchronized parallel operation of OUT1 and OUT2 for single high-current (up to 8 A) drive configurations. The device implements UVLO with turn-on at 4.4–4.6 V and turn-off at 3.6–3.8 V, ensuring safe startup and shutdown across its full -40 °C to 125 °C operating junction temperature range.

Key Specifications

Pinout & Package

PM8834 is available in industry-standard SO8 (8-pin plastic small outline) and MSOP8-EP (8-pin mini small outline with exposed thermal pad) packages. Both variants support surface-mount assembly and require thermal vias to GND plane for the MSOP8-EP variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IRS2005PBF and LM5113SD, the PM8834 delivers true dual-channel independence with matched timing, built-in UVLO, and seamless 5–18 V operation - reducing system-level design effort and improving timing predictability in high-frequency power stages.

Availability

PM8834 is available at Aetrix Electronics and suitable for SMPS, Class-D amplifiers, and motor controllers requiring stable component supply, long-term lifecycle assurance, and dual-package flexibility (SO8 and MSOP8-EP).

Supply support for PM8834 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, specializing in power management, analog, and microcontroller technologies for industrial, automotive, and consumer markets.

The PM8834 belongs to ST's high-performance gate driver product line, engineered specifically for high-frequency, high-current low-side switching in power conversion systems demanding precision timing, thermal resilience, and functional safety readiness.

FAQ

Can PM8834 drive both N-channel MOSFETs and IGBTs?

Yes, PM8834 is explicitly qualified for both N-channel MOSFETs and IGBTs. Its 4 A source/5 A sink capability, low R_DS(on) (0.7 Ω sink), and fast 10–20 ns rise/fall times into 2.5 nF loads ensure effective gate charging/discharging for devices with Q_G up to 100 nC. The datasheet confirms IGBT support in Section 1 and Table 5.

What is the minimum gate resistor required for safe operation?

A minimum 2.2 Ω series gate resistor is mandatory when VCC > 15 V and capacitive load < 10 nF, per Section 7.1 of the datasheet. This prevents undervoltage excursions violating the safe operating area. For loads < 4.7 nF, Figure 5 specifies higher resistance values - e.g., ≥4.7 Ω for 2 nF loads - to limit peak current and maintain thermal stability.

Does PM8834 support paralleling of outputs, and what is the maximum combined current?

Yes, PM8834 supports paralleling of OUT1/OUT2 and PWM1/PWM2 to form a single high-current driver, as shown in Figure 4. With matched propagation delays (±5 ns), both channels switch synchronously, delivering up to 8 A peak current (4 A × 2) while maintaining timing integrity and minimizing shoot-through risk.

How does the anti cross-conduction protection work in PM8834?

The PM8834 implements hardware-level anti cross-conduction by continuously monitoring internal N-DMOS and P-DMOS states. Before turning on either transistor, it verifies the other is fully off - preventing simultaneous conduction and eliminating shoot-through current. This is active during all transitions and requires no external timing components or microcontroller intervention.