Monolithic Power Systems Inc. MP2735DQG-LF-P

Overview

MP2735DQG-LF-P from Monolithic Power Systems is a low-voltage dual SPDT analog switch IC with 0.45Ω typical on-resistance at 2.7V, 29ns turn-on time, and operation from 1.65V to 5.5V single supply. It features two independent control pins (IN1/IN2), break-before-make switching, and 1.4mm × 1.8mm QFN10 package - designed for audio routing and battery-powered portable systems requiring low-power signal path control.

For engineers reviewing the MP2735DQG-LF-P datasheet, MP2735DQG-LF-P pinout, MP2735DQG-LF-P application, or MP2735DQG-LF-P equivalent, key selection criteria include guaranteed 1.65V logic compatibility, ±250mA continuous channel current, high off-isolation (–70dB), and dual independent SPDT topology without enable functionality.

Technical Context

The MP2735DQG-LF-P implements two fully independent CMOS SPDT switches, each with separate INx control inputs driving NOx/NCx/COMx paths. Its architecture guarantees break-before-make timing (10ns typ.) and bidirectional analog conduction within rail-to-rail voltage range (0V to V+).

It operates across 1.65V–5.5V supply with 1.65V logic-compatible input thresholds, enabling direct interfacing with 1.8V/2.5V/3.3V MCUs and single-cell Li-ion battery systems (2.7V–4.2V). No internal enable function - all control is per-switch via dedicated IN1/IN2 pins.

Key Specifications

Pinout & Package

MP2735DQG-LF-P uses a 10-pin QFN package with exposed thermal pad (JEDEC MO-220 compliant), dimensions 1.4mm × 1.8mm × 0.55mm height, and pin 1 marked by top-side index notch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual SPDT analog switch applications.

Compared with MP2736DQG-LF-P and TMUX1574RTER, MP2735DQG-LF-P uniquely delivers independent per-switch control, lowest on-resistance flatness (0.15Ω), and highest off-isolation - making it the preferred choice for multi-path audio routing where channel autonomy and signal purity are critical.

Availability

MP2735DQG-LF-P is available at Aetrix Electronics and suitable for cellular phones, portable media players, handheld test instruments, and battery-powered audio systems requiring stable component supply and long-term obsolescence management.

Supply support for MP2735DQG-LF-P 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, headquartered in California and serving global power management and signal conditioning markets since 1997.

The MP2735 belongs to MPS's low-voltage analog switch product line, engineered specifically for portable consumer electronics demanding ultra-low on-resistance, rail-to-rail signal handling, and minimal board space in 1.4mm × 1.8mm QFN packages.

FAQ

Is MP2735DQG-LF-P still recommended for new designs?

No - Monolithic Power Systems explicitly states "MP2735 NOT RECOMMENDED FOR NEW DESIGNS. REFER TO MP2736" in its official datasheet. However, MP2735DQG-LF-P remains actively stocked and supported for legacy design maintenance, repair, and life-cycle extension where dual independent control is required and MP2736's shared IN logic is incompatible.

What is the maximum continuous current per channel?

The MP2735DQG-LF-P supports ±250mA continuous current through NO, NC, or COM terminals, as specified in Absolute Maximum Ratings. This rating applies across the full operating temperature range (–40°C to +85°C) and enables reliable use in headphone driver and speaker switching applications without thermal derating under typical conditions.

Does MP2735DQG-LF-P support 1.8V logic inputs?

Yes - the device guarantees 1.65V minimum input high voltage (V_INH) at V+ < 3.3V, making it fully compatible with 1.8V GPIO outputs. At 1.8V supply, VINH = 1.65V ensures robust noise margin (>150mV) and eliminates need for external level-shifting circuitry in modern low-voltage microcontroller interfaces.

How is break-before-make timing verified?

Break-before-make interval (t_BBM) is guaranteed at 10ns minimum (typical) under V+ = 3.6V, RL = 50Ω, CL = 35pF, and TA = +25°C, as measured using the test circuit in Figure 1 of the datasheet. This timing is ensured by internal gate drive sequencing and does not require external timing components or layout constraints.

Can MP2735DQG-LF-P switch negative signals?

No - the device is not rated for negative input voltages. Absolute maximum ratings specify IN/COM/NC/NO voltage as –0.3V to V+ + 0.3V. Signals below ground will forward-bias internal ESD diodes, risking latch-up or damage unless clamped externally. It is strictly intended for single-supply, positive-rail-only analog signal routing.

What is the thermal pad connection requirement?

The exposed thermal pad (pin 6 is GND; pad is electrically connected to GND) must be soldered to a minimum 25mm² copper pour on the PCB for thermal performance and mechanical reliability. The datasheet recommends connecting the pad directly to the main GND plane using ≥4 thermal vias (0.3mm diameter) to inner layers to maintain junction temperature within limits at full load.

Is RoHS compliance confirmed for MP2735DQG-LF-P?

Yes - the "-LF" suffix denotes lead-free and RoHS-compliant packaging per EU Directive 2011/65/EU. The device meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) and is qualified for standard reflow profiles including peak temperatures up to 260°C, with no exemptions required.