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Monolithic Power Systems Inc. MP5421DM-LF
- Part No.:
- MP5421DM-LF
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MP5421DM-LF.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,034
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Product details
Overview
MP5421DM-LF from Monolithic Power Systems is a quad-channel, high-speed, rail-to-rail input-output operational amplifier optimized for TFT-LCD voltage reference buffering. It delivers 20MHz –3dB bandwidth, 45V/μs slew rate, and operates from 3.2V to 20V single supply with 1.6mA per amplifier quiescent current. Its output swings within 100mV of both rails and supports ±50mA output drive-key for driving capacitive LCD column lines.
For engineers reviewing the MP5421DM-LF datasheet, MP5421DM-LF pinout, MP5421DM-LF application in TFT-LCD biasing, or MP5421DM-LF equivalent for quad rail-to-rail op amp replacement, this page provides verified electrical parameters, TSSOP-14 terminal mapping, real-world use cases in portable display systems, and validated alternatives with documented functional trade-offs.
Technical Context
The MP5421DM-LF implements dual-input-stage architecture: a PNP pair for rail-to-rail input operation from VS– –0.5V to VS+ –1V, and an NPN pair extending input range to VS+ +0.5V. This enables full common-mode range coverage but introduces transition-region distortion near supply rails.
Its output stage is designed for high-current sourcing/sinking (±50mA) into capacitive loads typical of LCD column drivers, with thermal shutdown protection and guaranteed stability at unity gain. Channel separation is 70dB at 5MHz, critical for minimizing crosstalk in multi-channel display bias networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3dB Bandwidth | 20MHz at RL = 10kΩ, CL = 10pF - supports fast settling for high-resolution LCD gamma correction updates. |
| Slew Rate | 45V/μs - enables <500ns settling to ±0.1% for 2V step, essential for dynamic contrast control timing. |
| Supply Range | 3.2V to 20V single supply - accommodates wide-panel LCD bias voltages without split-rail generation. |
| Output Swing | Within 100mV of VS+ and VS– - maximizes usable dynamic range for precision VCOM and gamma buffer outputs. |
| Input Range | VS– –0.5V to VS+ +0.5V - allows direct interfacing with DACs and references operating at supply extremes. |
| Quiescent Current | 1.6mA per amplifier - enables low-power operation in battery-powered e-notebooks and portable displays. |
| Channel Separation | 70dB at 5MHz - suppresses inter-channel interference in quad gamma voltage distribution networks. |
Pinout & Package
The MP5421DM-LF is housed in a 14-pin TSSOP package (JEDEC MO-153 compliant), with 0.65mm pitch, 5.0mm × 4.4mm body size, and θJA = 40°C/W on 4-layer PCB - enabling compact, thermally efficient layout in space-constrained display modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VINA–) | Inverting input of Amp A | Differential node for feedback configuration; referenced to internal bias network. |
| 2 (VINA+) | Non-inverting input of Amp A | Accepts rail-to-rail input signals up to VS+ +0.5V; requires low-impedance source for minimal distortion. |
| 3 (VOUTA) | Output of Amp A | Capable of ±50mA drive; must be decoupled with 0.1μF ceramic capacitor close to pin for stability. |
| 4 (VS–) | Negative supply rail | Common return for all four amplifiers; connects directly to system ground or negative bias rail. |
| 5 (VINB+) | Non-inverting input of Amp B | Independent input channel; shares no internal nodes with Amp A-enables isolated gamma segment buffering. |
| 6 (VINB–) | Inverting input of Amp B | Configurable for unity-gain follower or closed-loop gain; matched offset vs. Amp A per datasheet matching. |
| 7 (VOUTB) | Output of Amp B | Electrically isolated output stage; supports independent load capacitance up to 100pF without oscillation. |
| 8 (VS+) | Positive supply rail | Single power input for all channels; requires local 10μF + 0.1nF decoupling to suppress PSRR degradation. |
| 9 (VINC+) | Non-inverting input of Amp C | Third independent input; identical CMIR and bias specs as Pins 2 and 5 - ensures consistent gamma voltage tracking. |
| 10 (VINC–) | Inverting input of Amp C | Matched input impedance (1GΩ) and capacitance (1.35pF) across all four channels for balanced layout. |
| 11 (VOUTC) | Output of Amp C | Guaranteed phase margin >50° at AV = +1 - eliminates need for external compensation in most LCD bias applications. |
| 12 (VIND–) | Inverting input of Amp D | Final channel input; same ESD protection (HBM >2kV) and latch-up immunity as other inputs. |
| 13 (VIND+) | Non-inverting input of Amp D | Supports DC-coupled reference input; TCVOS = 5μV/°C ensures stable gamma over temperature in automotive displays. |
| 14 (VOUTD) | Output of Amp D | Full 50mA drive capability; thermal foldback activates at TJ >125°C - protects against sustained short-circuit in panel assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input with dual differential pairs | Enables direct connection to DAC outputs spanning VS– to VS+, eliminating level-shifting circuitry in gamma voltage generators. |
| Output swing within 100mV of rails | Preserves >95% of available voltage headroom for precise VCOM and gamma tuning in 12-bit display systems. |
| 70dB channel separation at 5MHz | Prevents crosstalk-induced color shift between adjacent gamma segments in high-PPI LCD panels. |
| Unity-gain stable with no external compensation | Reduces BOM count and layout area in compact display driver ICs where space for feedback components is constrained. |
| Thermal shutdown with automatic recovery | Allows safe operation during transient overloads (e.g., panel ESD events) without requiring system-level fault handling logic. |
Applications
| TFT-LCD Gamma Voltage Buffering | VCOM Driver for Active-Matrix Displays |
|---|---|
Use Scenario: Generating 14–16 precise gamma correction voltages from a digital potentiometer or DAC in high-resolution LCD panels. IC Role / Device Role / Timing Role: Quad op amp configured as unity-gain followers, each buffering one gamma tap to drive high-capacitance column lines. Use Value: 20MHz bandwidth and 45V/μs slew rate ensure sub-microsecond settling for dynamic gamma updates during video frame transitions. | Use Scenario: Driving the common electrode (VCOM) in AMOLED and LTPS LCD panels requiring low-noise, low-drift bias voltage. IC Role / Device Role / Timing Role: Single amplifier (e.g., Amp A) used in inverting configuration to invert and buffer reference voltage with rail-to-rail output swing. Use Value: Output swing within 100mV of rails enables full utilization of 18V VCOM range while maintaining <2mV offset error over temperature. |
| Portable Electronic Notebook Display Interface | Touch-Screen Controller Analog Front-End |
Use Scenario: Biasing active matrix backplanes in 10–12 inch e-notebooks powered by single-cell Li-ion (3.2–4.2V). IC Role / Device Role / Timing Role: All four amplifiers used to generate segmented gate-on/gate-off voltages and data-line precharge levels. Use Value: 1.6mA per amplifier quiescent current enables >10-hour battery life while supporting 60Hz refresh with zero visible flicker. | Use Scenario: Conditioning analog signals from resistive or capacitive touch sensors before ADC sampling in industrial HMI panels. IC Role / Device Role / Timing Role: Two amplifiers configured as programmable-gain stages; remaining two as anti-aliasing filters. Use Value: 20MHz bandwidth supports >100kHz noise rejection filtering without phase lag that would distort touch coordinate calculation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2464IDR | Lower slew rate (1.6V/μs), narrower bandwidth (6.4MHz), higher supply current (650μA per amp) | Not suitable for high-speed gamma updates; limited to static biasing in low-refresh-rate displays | Select when cost sensitivity outweighs speed requirements and thermal budget permits higher quiescent power. |
| AD8604ARUZ | Higher precision (VOS = 600μV max), lower noise (12nV/√Hz), but only 8MHz bandwidth and 5V/μs slew rate | Better for precision sensor signal conditioning than LCD drive; insufficient for >30Hz dynamic gamma | Choose for mixed-signal systems requiring both display bias and high-fidelity analog sensing on shared PCB. |
Compared with TLV2464IDR and AD8604ARUZ, the MP5421DM-LF uniquely balances high-speed performance (20MHz/45V/μs), rail-to-rail operation, and quad integration in TSSOP-14-making it the only option qualified for real-time gamma correction in modern high-PPI LCDs.
Availability
MP5421DM-LF is available at Aetrix Electronics and suitable for TFT-LCD gamma buffering, VCOM driver circuits, portable electronic notebook displays, and touch-screen controller analog front-ends requiring stable component supply across extended production cycles.
Supply support for MP5421DM-LF 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, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP5121/MP5221/MP5421 family was developed specifically for high-voltage, high-speed analog signal conditioning in flat-panel display systems-emphasizing rail-to-rail operation, thermal robustness, and layout efficiency in tight-space display driver modules.
FAQ
What is the maximum capacitive load the MP5421DM-LF can drive without instability?
The MP5421DM-LF is unity-gain stable with capacitive loads up to 100pF when proper PCB layout practices are followed-including localized 0.1μF ceramic decoupling at each VS+ pin and ground plane routing. For loads exceeding 100pF, a series resistor (10–22Ω) placed between output and load capacitance restores phase margin above 50°.
Does the MP5421DM-LF support true single-supply operation below 5V?
Yes-the MP5421DM-LF is fully specified down to 3.2V single supply, with rail-to-rail input extending 0.5V beyond both rails and output swing within 100mV of each rail. At 3.2V, it maintains 20MHz bandwidth and 45V/μs slew rate, enabling use in low-voltage portable displays powered by single Li-ion cells.
How does the dual-input-stage architecture affect THD in audio-related applications?
The PNP-to-NPN input stage transition near the positive rail introduces measurable crossover distortion, resulting in THD >0.1% for signals peaking within 1V of VS+. While acceptable for LCD biasing, this limits suitability for high-fidelity audio buffering; for such use, consider dedicated audio op amps with single-pair input stages.
Can MP5421DM-LF outputs be paralleled to increase current drive?
No-outputs must not be paralleled. The MP5421DM-LF lacks output current-sharing circuitry, and mismatched offsets or thermal gradients between channels will cause large circulating currents, potentially triggering thermal shutdown or damaging the IC. Use a single amplifier per output path.
What is the recommended PCB layout for minimizing PSRR degradation at high frequencies?
Place 10μF tantalum and 0.1nF ceramic capacitors in parallel between VS+ and VS– pins, with the ceramic capacitor located ≤2mm from the pins. Route VS+ and VS– traces over solid ground plane, avoid sharing supply paths with switching regulators, and use separate ground vias for each amplifier's VS– connection to prevent ground bounce coupling.
Is the MP5421DM-LF RoHS-compliant and lead-free?
Yes-the "-LF" suffix in MP5421DM-LF explicitly denotes RoHS-compliant, lead-free packaging per JEDEC J-STD-609. The device meets IPC/JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) and is qualified for reflow soldering up to 260°C peak temperature.
MP5421DM-LF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 45V/µs
- Gain Bandwidth Product:
- 14 MHz
- -3db Bandwidth:
- 20 MHz
- Current - Input Bias:
- 500 nA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 1.6mA (x4 Channels)
- Current - Output / Channel:
- 70 mA
- Voltage - Supply Span (Min):
- 3.2 V
- Voltage - Supply Span (Max):
- 20 V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
MP5421DM-LF FAQ
1.How can I place an order for MP5421DM-LF through Aetrix?
Please submit a Request for Quotation (RFQ) for MP5421DM-LF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MP5421DM-LF reliable?
The price and inventory of MP5421DM-LF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP5421DM-LF is usually 5 days.
3.What payment methods are accepted for MP5421DM-LF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP5421DM-LF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP5421DM-LF?
MP5421DM-LF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP5421DM-LF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MP5421DM-LF?
For technical support, including MP5421DM-LF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP5421DM-LF requirements.
6.How does Aetrix verify that MP5421DM-LF is sourced from the original manufacturer or authorized distributors?
All MP5421DM-LF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP5421DM-LF meets industry standards.
7.What is the process for return or replacement of MP5421DM-LF?
All MP5421DM-LF units undergo pre-shipment inspection (PSI). If there is an issue with MP5421DM-LF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MP5421DM-LF part is unused and in its original packaging.
Return procedure for MP5421DM-LF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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