UM6K33NTN vs CSD17483F4: Component Comparison for Hardware Engineers
Quick verdict
For low-current, dual-channel switching applications requiring ultra-compact footprints and minimal gate drive, the UM6K33NTN is the clear choice, offering integrated dual N-channels with 1.2V logic-level drive and low input capacitance. Conversely, the CSD17483F4 excels in single-channel, higher-current scenarios up to 1.5A at 30V, with significantly lower R_DS(on) and higher power dissipation, suitable for power switching or load driving where efficiency and thermal headroom are priorities.
Spec comparison table
| Spec | UM6K33NTN | CSD17483F4 | Notes |
|---|---|---|---|
| Configuration | Dual N-Channel | Single N-Channel | UM6K33NTN offers two MOSFETs per package, useful for half-bridge or dual switching. |
| Continuous Drain Current (I_D @ 25°C) | 200 mA | 1.5 A | CSD17483F4 supports 7.5× higher current, critical for higher load applications. |
| Maximum Drain-Source Voltage (V_DS) | 50 V | 30 V | UM6K33NTN can handle higher voltage, suitable for intermediate voltage rails. |
| Gate Drive Voltage for R_DS(on) | Logic Level, 1.2 V Drive | 1.8 V (min), 4.5 V typical | UM6K33NTN requires less gate drive voltage, better for low-voltage logic interfaces. |
| Maximum Gate Charge (Q_g @ V_GS) | Not specified | 1.3 nC @ 4.5 V | Lower gate charge generally improves switching efficiency; only CSD17483F4 data given. |
| Input Capacitance (C_iss @ V_DS) | 25 pF @ 10 V | 190 pF @ 15 V | UM6K33NTN has ~7.6× lower input capacitance, reducing gate drive losses and EMI. |
| Mounting Type | Surface Mount | Surface Mount | Both are SMD, but package types differ (see below). |
| Operating Temperature Range | up to 150°C (TJ) | -55°C to 150°C (TJ) | CSD17483F4 supports wider ambient temperature range; UM6K33NTN rating unspecified below 0°C. |
| Package / Case | 6-TSSOP / SC-88 / SOT-363 | 3-PICOSTAR (3-XFDFN) | UM6K33NTN is a dual transistor array in a 6-pin package; CSD17483F4 is single transistor. |
| Maximum Power Dissipation | 120 mW | 500 mW | CSD17483F4 dissipates >4× power, critical for thermal management under load. |
| R_DS(on) (Max) | 2.2 Ω @ 200 mA, 4.5 V | 240 mΩ @ 500 mA, 8 V | CSD17483F4 offers ~9× lower R_DS(on), drastically lowering conduction losses in higher current applications. |
| Threshold Voltage (V_GS_th) | 1 V @ 1 mA | 1.1 V @ 250 µA | Comparable threshold voltages; both suitable for logic-level drive circuits. |
| Technology | MOSFET (Metal Oxide) | MOSFET (Metal Oxide) | Both use standard MOSFET tech. |
| Supplier Device Package | UMT6 | 3-PICOSTAR | Package choice impacts layout, thermal dissipation, and footprint. |
Design trade-offs
The UM6K33NTN targets low-current, low-voltage switching needs where integration of two MOSFETs in a compact 6-pin package and ultra-low gate drive (1.2 V) are valuable. Its extremely low input capacitance (25 pF) translates to minimal gate charge and switching losses, which is beneficial in battery-powered or low-power digital switching contexts. However, its continuous current rating of 200 mA and R_DS(on) of 2.2 Ω make it unsuitable for higher current loads or power switching, where conduction losses would be prohibitive.
On the other hand, the CSD17483F4 supports up to 1.5 A continuous current and 500 mW power dissipation, with an R_DS(on) of 240 mΩ at 500 mA, which is an order of magnitude lower than UM6K33NTN. This enables more efficient conduction and better thermal performance in medium-power DC-DC converters, load switches, or protection circuits. The trade-off comes in a higher input capacitance (190 pF), about 7.6× greater, requiring stronger gate drivers and potentially more careful switching waveform management to avoid excessive gate drive losses and EMI.
Thermally, the CSD17483F4’s higher power dissipation rating and lower R_DS(on) allow it to handle higher loads without significant heat sinking, while the UM6K33NTN’s 120 mW limit restricts it to light loads or signal-level switching. The UM6K33NTN’s dual MOSFET configuration allows saving board space and simplifies dual-switch applications, but each transistor’s R_DS(on) and current capacity are limited.
From a layout perspective, the UM6K33NTN’s smaller 6-TSSOP or SC-88 footprint is advantageous in dense designs, whereas the CSD17483F4’s 3-PICOSTAR package is optimized for low resistance and thermal performance at the expense of slightly larger area per transistor.
Cost considerations will depend on volume and supplier pricing, but generally, integrated dual MOSFET arrays like UM6K33NTN can reduce PCB complexity and assembly cost by replacing two discrete components. The CSD17483F4’s superior current handling and R_DS(on) justify its use in more demanding circuits despite potentially higher per-unit cost.
Use-case fit
Choose UM6K33NTN when…
- Designing low-current load switches or level shifters operating up to 50 V with currents under 200 mA.
- Implementing dual low-side or high-side switches in tight spaces where board area and pin count are constrained.
- Interfacing directly with low-voltage logic (1.2 V gate drive) without dedicated gate driver ICs.
- Applications requiring minimal gate charge to preserve battery life, such as handheld or IoT devices.
- Switching signals rather than power, where conduction losses and thermal dissipation are minimal concerns.
Choose CSD17483F4 when…
- Switching or protecting loads drawing up to 1.5 A at voltages ≤ 30 V with efficient conduction.
- Building DC-DC converters or power management circuits where low R_DS(on) (240 mΩ) reduces losses.
- Thermal headroom is required up to 500 mW dissipation without extensive heatsinking.
- Gate drive voltage of 1.8 V or higher is available, allowing full enhancement and minimal conduction losses.
- Single MOSFET per package is acceptable and preferred for discrete or modular design approaches.
Drop-in compatibility
These parts are not pin- or footprint-compatible. The UM6K33NTN is a dual N-channel MOSFET array in a 6-pin UMT6 package (6-TSSOP / SC-88 / SOT-363), whereas the CSD17483F4 is a single N-channel MOSFET in a 3-pin 3-PICOSTAR (3-XFDFN) package. Substituting one for the other requires redesigning the PCB footprint and possibly the gate drive and thermal management circuitry. Additionally, the dual transistor nature of UM6K33NTN vs single transistor CSD17483F4 means circuit topology changes are necessary.
Alternatives to consider
- Si2302DS (Vishay): Dual N-channel MOSFET array with low R_DS(on) and logic-level gate drive, suitable for low-voltage switching roles.
- BSS138 (ON Semiconductor): Single N-channel MOSFET with extremely low gate charge and logic-level drive, ideal for low-current signal switching.
- SI2301 (Vishay): Single N-channel MOSFET with low R_DS(on) around 0.1 Ω at low currents, targeting medium power switching with small footprint.
Each alternative offers different trade-offs in current capacity, gate drive voltage, and package size, to evaluate based on your specific application constraints.