My Inquiry
My Account
Monolithic Power Systems Inc. MP3209DGU-LF-Z
- Part No.:
- MP3209DGU-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-UFDFN Exposed Pad
- Datasheet:
-
MP3209DGU-LF-Z.pdf
- Description:
- IC REG BOOST ADJ 350MA 8UTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,753
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP3209DGU-LF-Z from Monolithic Power Systems is a current-mode 1.4MHz boost converter IC with integrated 0.5Ω MOSFET, supporting 2.5V–6V input and up to 22V output at 350mA peak switch current. It features internal soft-start (120µs), UVLO (2.45V rising), thermal shutdown (160°C), and operates in ultra-thin 2mm × 2mm 8-pin UTQFN. Used in OLED drivers and compact LCD displays where height <1mm is critical.
For engineers reviewing the MP3209DGU-LF-Z datasheet, MP3209DGU-LF-Z pinout, MP3209DGU-LF-Z application, or MP3209DGU-LF-Z equivalent, key selection criteria include fixed 1.4MHz switching frequency, 1.25V FB reference, EN-controlled startup, SW pin voltage swing up to 22V, and thermal performance in 2×2 QFN with θJA = 80°C/W.
Technical Context
The MP3209DGU-LF-Z implements fixed-frequency (1.4MHz) peak-current-mode control with internal ramp compensation to suppress subharmonic oscillation above 50% duty cycle. Its error amplifier compares FB voltage against a 1.25V bandgap reference and drives PWM comparator via stabilized current-sense signal.
Operation relies on internal MOSFET switching between IN and SW pins, with feedback regulation achieved through external resistor divider on FB. Soft-start ramps current limit in three 40µs steps, limiting inrush and output overshoot during startup under varying load and input conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.4 MHz fixed - enables use of 22 µH inductor and ≤10 µF ceramic output capacitor for <1 mm profile solutions. |
| Input Voltage Range | 2.5 V to 6 V - supports single-cell Li-ion (3.0–4.2 V), 3.3 V rail, or dual-AA battery inputs without pre-regulation. |
| Output Voltage Range | 3 V to 22 V - configurable via FB resistor divider; suitable for white LED strings, OLED bias, and LCD VCOM generation. |
| FB Reference Voltage | 1.25 V ±4% - sets regulation accuracy; used with external resistive divider to program output without external reference. |
| SW On-Resistance | 0.5 Ω - limits conduction loss at 350 mA peak switch current; determines efficiency drop at high duty cycles (e.g., VIN = 2.7 V, VOUT = 12 V). |
| Current Limit | 350 mA typical - protects internal MOSFET during overload or short-circuit; clamps peak inductor current before saturation. |
| Thermal Shutdown | 160 °C - activates internal latch-off to prevent permanent damage; recovers after cooldown with automatic restart if EN remains asserted. |
Pinout & Package
MP3209DGU-LF-Z is housed in a 2 mm × 2 mm, 0.5 mm height, 8-pin ultra-thin QFN (UTQFN) package with exposed thermal pad. Pin 1 is marked by top-side index area (Option A or B per JEDEC MO-229 VCCD-3). The package supports high-power density layout with θJC = 12°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | GND | Power and signal ground reference; must be connected to low-impedance PCB plane and tied directly to exposed thermal pad. |
| 2 | IN | Main input supply pin; requires local 4.7 µF ceramic bypass capacitor placed within 2 mm of pin. |
| 3, 7 | NC | No internal connection; must remain unconnected and not routed to any net or plane. |
| 4 | EN | Active-high enable input; threshold 1.3 V (typ), hysteresis 100 mV; floating prohibited - tie to IN for always-on operation. |
| 6 | FB | Feedback input referenced to 1.25 V; connects to resistor divider from VOUT; sensitive to noise - route away from SW and GND loops. |
| 8 | SW | Drain of internal N-channel MOSFET; swings from GND to up to 22 V; connects directly to inductor and Schottky rectifier anode. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated control loop | Eliminates need for external compensation network - reduces BOM count and layout sensitivity while maintaining stability across 3–22 V output range. |
| Internal soft-start (120 µs) | Ramps current limit in three 40 µs steps - prevents input surge current >1.5× steady-state and limits VOUT overshoot to <5% in typical 12 V/50 mA application. |
| UVLO with 92 mV hysteresis | Enables reliable start-up from weak batteries (e.g., 2.5 V cutoff) and prevents oscillatory restart near dropout; rising threshold = 2.45 V. |
| Thermal shutdown + current limit | Provides dual-layer protection: current limit responds in <100 ns to overloads; thermal shutdown latches off die above 160°C with auto-recovery. |
| Ultra-thin 2×2 QFN package | 0.5 mm max height enables integration into space-constrained modules (e.g., wearable display subassemblies) without mechanical interference. |
Applications
| OLED Display Bias Supply | Compact LCD VCOM Generator |
|---|---|
|
Use Scenario: Powering OLED panel anode at 12–18 V from 3.3 V system rail in smartwatch or AR glasses. IC Role / Device Role / Timing Role: Boost converter regulating high-impedance bias rail; delivers 30–100 mA with <1% line/load regulation. Use Value: Enables single-cell battery operation with minimal board area; 1.4 MHz switching avoids audible noise and simplifies EMI filtering. |
Use Scenario: Generating negative VCOM (–5 V to –8 V) for small TFT LCDs using inverting configuration with external diode and capacitor. IC Role / Device Role / Timing Role: Configured as inverting charge pump booster; FB pin biased to set regulated negative output. Use Value: Eliminates need for dedicated inverting IC; leverages same 2×2 QFN footprint and layout as positive boost variants. |
| Cell Phone Camera Flash Driver | USB-Powered External Modem Boost |
|
Use Scenario: Driving white LED flash array requiring 18–20 V at 200–300 mA peak from 3.7 V Li-ion battery. IC Role / Device Role / Timing Role: High-efficiency DC-DC boost stage with EN-controlled burst mode for standby current <1 µA. Use Value: Achieves >85% efficiency at 200 mA load; internal MOSFET and 0.5 Ω RDS(on) minimize thermal rise in sealed phone chassis. |
Use Scenario: Boosting 5 V USB power to 12 V for RS-232 level-shifting or legacy modem circuitry in portable docking stations. IC Role / Device Role / Timing Role: Fixed-frequency boost regulator with EN pin controlled by host MCU to reduce idle power draw. Use Value: Supports hot-plug USB compliance with <1 µA shutdown current and fast 120 µs startup time upon enumeration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS610992RTER | Lower IQ (200 nA shutdown, 400 µA quiescent); 1.2 MHz switching; no internal current limit - requires external sense resistor. | Better suited for ultra-low-power coin-cell applications (<10 µA avg. load); less robust against short-circuit events. | Select when battery life >2 years is required and fault tolerance is managed at system level. |
| RT9013-33GJ5 | Fixed 3.3 V output only; 1.5 MHz switching; 300 mA switch current; no EN pin - always-on operation. | Limited to fixed-output systems; lacks programmability and enable control needed for dynamic power sequencing. | Choose only for cost-sensitive, non-programmable 3.3 V boost where FB/EN flexibility is unnecessary. |
Compared with TPS610992RTER and RT9013-33GJ5, MP3209DGU-LF-Z provides balanced trade-offs: integrated protection (UVLO, thermal, current limit), programmable output (via FB), and industrial-grade thermal performance in 2×2 QFN - making it optimal for mid-power portable displays and modems requiring reliability and design flexibility.
Availability
MP3209DGU-LF-Z is available at Aetrix Electronics and suitable for OLED display bias supplies, compact LCD VCOM generators, and USB-powered external modems requiring stable component supply, RoHS-compliant packaging, and consistent lead-time visibility.
Supply support for MP3209DGU-LF-Z 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 MP3209 belongs to MPS's low-profile DC-DC boost converter product line, engineered specifically for space-constrained portable electronics requiring sub-1mm solution height, battery-friendly soft-start, and robust protection without external components.
FAQ
What is the maximum output voltage achievable with MP3209DGU-LF-Z?
The MP3209DGU-LF-Z supports output voltages up to 22 V, limited by the absolute maximum rating of the SW pin (–0.3 V to 25 V). This is confirmed in the Absolute Maximum Ratings table and validated in Typical Application Circuit (Figure 2), where 12 V output is demonstrated with 5 V input. Operation beyond 22 V risks violating SOA limits and triggering thermal shutdown.
Can MP3209DGU-LF-Z operate with input voltage below 2.5 V?
No - the recommended operating input voltage starts at 2.5 V, and UVLO disables operation below 2.45 V (rising threshold). Below 2.5 V, the device ceases regulation and enters undervoltage lockout; attempting to force operation risks unstable switching and uncontrolled current limit behavior per Electrical Characteristics table.
Is an external Schottky diode required for MP3209DGU-LF-Z?
Yes - although the MP3209DGU-LF-Z integrates a power MOSFET, it does not integrate a synchronous rectifier. An external Schottky diode (e.g., CMH5H-3 or BAT54-02) is mandatory for flyback path conduction. The datasheet explicitly specifies diode selection criteria including reverse voltage rating > VOUT and low forward voltage for efficiency.
How does the internal soft-start function affect startup time and inrush current?
The internal soft-start ramps the current limit in three 40 µs steps (total 120 µs), limiting peak inrush current to ≤1.5× steady-state load. In a 12 V/50 mA application, this reduces input surge from ~350 mA to <200 mA and holds VOUT overshoot to <5%, verified in Figure 3 transient plots and described in the OPERATION section.
What is the thermal performance difference between TSOT23-5 and UTQFN packages?
The 2×2 UTQFN package has θJA = 80°C/W versus 220°C/W for TSOT23-5 - a 2.75× improvement. At 350 mA load and 5 V input, UTQFN dissipates heat more effectively, allowing continuous operation at +85°C ambient without thermal shutdown, whereas TSOT23-5 would exceed junction temperature limits under identical conditions.
Does MP3209DGU-LF-Z support synchronization to an external clock?
No - the MP3209DGU-LF-Z uses a fixed 1.4 MHz internal oscillator with no SYNC pin or frequency adjustment capability. The datasheet confirms "1.4MHz Fixed Switching Frequency" under FEATURES and lists no external clock interface in PIN FUNCTIONS or APPLICATIONS INFORMATION.
What is the minimum recommended output capacitance for stable operation?
The datasheet specifies a minimum of 4.7 µF ceramic output capacitor (C2), placed close to SW and GND pins. Using <4.7 µF risks increased output ripple (>50 mV p-p) and potential instability due to insufficient phase margin, as shown in Typical Performance Characteristic curves with C2 = 4.7 µF baseline.
MP3209DGU-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- 22V
- Current - Output:
- 350mA
- Frequency - Switching:
- 1.4MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UTQFN (2x2)
MP3209DGU-LF-Z FAQ
1.How can I place an order for MP3209DGU-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3209DGU-LF-Z 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 MP3209DGU-LF-Z reliable?
The price and inventory of MP3209DGU-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3209DGU-LF-Z is usually 5 days.
3.What payment methods are accepted for MP3209DGU-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3209DGU-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3209DGU-LF-Z?
MP3209DGU-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3209DGU-LF-Z 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 MP3209DGU-LF-Z?
For technical support, including MP3209DGU-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3209DGU-LF-Z requirements.
6.How does Aetrix verify that MP3209DGU-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP3209DGU-LF-Z 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 MP3209DGU-LF-Z meets industry standards.
7.What is the process for return or replacement of MP3209DGU-LF-Z?
All MP3209DGU-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3209DGU-LF-Z, 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 MP3209DGU-LF-Z part is unused and in its original packaging.
Return procedure for MP3209DGU-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP3209DGU-LF-Z Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
