Diodes Incorporated FMMT723TA

Overview

FMMT723TA from Diodes Incorporated is a 100V PNP low-saturation transistor in SOT23 package, designed for high-side switching and load disconnect applications. It delivers -1A continuous collector current, -330mV V_CE(sat) at -1A, and 210mΩ equivalent on-resistance, with AEC-Q101 qualification for automotive reliability.

For engineers reviewing the FMMT723TA datasheet, FMMT723TA pinout, FMMT723TA application, or FMMT723TA equivalent, key selection criteria include breakdown voltage (BV_CEO = -100V), saturation performance under high-current drive, thermal resistance (R_θJA = 200°C/W), and SOT23 footprint compatibility in space-constrained motor control and power management circuits.

Technical Context

This PNP bipolar junction transistor operates with emitter-grounded configuration and supports high-voltage blocking up to -100V in both collector-base and collector-emitter directions. Its low V_CE(sat) and characterized h_FE up to -1.5A enable efficient switching in DC-DC converters and load-switching stages where minimal conduction loss is critical.

The device uses a planar epitaxial structure with optimized base doping and geometry to achieve stable gain across wide current range (-10mA to -1.5A) and robust ESD tolerance (4kV HBM). Thermal design leverages SOT23's low thermal resistance to leads (R_θJL = 194°C/W) for pulsed-power operation up to 806mW at t ≤ 5 sec.

Key Specifications

Pinout & Package

SOT23 surface-mount plastic package (JEDEC TO-236AB), 3-terminal, lead-free and halogen-free "Green" construction per UL 94V-0. Dimensions: 2.9mm × 1.3mm × 1.0mm (L × W × H), weight ≈ 0.008g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP high-voltage switching applications.

Compared with ZXTN25050DFH and DMT3005LKQ, FMMT723TA offers optimal balance of SOT23 miniaturization, proven BJT linearity for analog feedback loops, and AEC-Q101 compliance - making it preferred for cost-sensitive, space-constrained automotive and industrial high-side switches where precise current control matters.

Availability

FMMT723TA is available at Aetrix Electronics and suitable for high-side driver, load disconnect switch, and motor drive applications requiring stable component supply, automotive-grade reliability, and SOT23 footprint compatibility.

Supply support for FMMT723TA 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability power management, signal integrity, and protection solutions for automotive, industrial, and consumer markets.

The FMMT series targets high-voltage, high-current discrete switching applications, with design focus on low saturation loss, AEC-Q101 qualification, and SOT23 scalability across complementary NPN/PNP pairs like FMMT624/FMMT723.

FAQ

What is the maximum safe operating voltage for FMMT723TA in continuous DC applications?

The absolute maximum collector-emitter voltage (V_CEO) is -100V at T_A = +25°C. For reliable long-term operation, derate to ≤ -80V in ambient temperatures above 75°C per the thermal derating curve. This rating applies to steady-state DC blocking; transient spikes must remain within the -100V limit to avoid avalanche breakdown.

Can FMMT723TA be used as a direct replacement for FMMT624 in circuit designs?

No - FMMT624 is its complementary NPN counterpart, not a functional replacement. Swapping them would invert switching polarity and likely cause circuit failure. They are intended for paired use in push-pull or H-bridge topologies. Pinout is identical (SOT23), but internal polarity and biasing requirements differ fundamentally.

How does the -330mV V_CE(sat) specification translate to real-world power dissipation at 1A?

At -1A collector current and -330mV saturation voltage, power dissipation is 330mW (P = |V_CE(sat)| × |I_C|). With R_θJA = 200°C/W on a standard FR4 board, this yields ~66°C junction-to-ambient rise - well within the -55°C to +150°C operating range if ambient stays below +84°C.

Is FMMT723TA suitable for pulse-width modulation (PWM) switching above 100kHz?

Yes - with f_T = 150MHz and turn-off time t_off = 760ns, FMMT723TA supports clean PWM switching up to at least 500kHz. However, base drive strength must exceed -150mA to ensure full saturation at high duty cycles; inadequate drive increases switching losses and thermal stress.