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Monolithic Power Systems Inc. MP3301GJ-Z
- Part No.:
- MP3301GJ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MP3301GJ-Z.pdf
- Description:
- IC LED DRV RGLTR PWM 1A TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,882
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Product details
Overview
MP3301GJ-Z from Monolithic Power Systems is a fixed-frequency, current-mode boost LED driver IC designed to regulate up to 10 white LEDs in series from a 2.5V–6V input. It integrates a 700mA MOSFET switch, operates at 1.3MHz, delivers 200mV feedback voltage for low-loss current sensing, and includes open-load shutdown, UVLO, thermal shutdown, and internal current limiting.
For engineers reviewing the MP3301GJ-Z datasheet, MP3301GJ-Z pinout, MP3301GJ-Z application, or MP3301GJ-Z equivalent, key selection criteria include its TSOT23-5 package footprint, analog/PWM dimming support via EN pin, 42V open-circuit protection threshold, and compatibility with single-cell Li-ion battery systems requiring high-efficiency backlight driving.
Technical Context
The MP3301GJ-Z implements a peak-current-mode, constant-frequency boost architecture with an internal 700mA N-channel MOSFET switch and 1.3MHz oscillator. Its error amplifier compares 200mV reference against FB voltage across an external sense resistor to regulate LED current.
Control logic enables dual dimming: analog dimming via 0.7–1.4V DC on EN (0–100% ILED), and PWM dimming using 200Hz–1kHz square wave ≥1.5V on EN. Open-load protection triggers shutdown when VSW exceeds 42V, and thermal shutdown activates at 150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.3MHz fixed - enables compact LC filter design with ≤4.7µH inductor and ≤0.47µF output capacitor |
| Feedback Voltage | 200mV - reduces power loss in current-sense resistor and improves efficiency at high LED currents |
| Max Output Current | 700mA internal limit - sets absolute ceiling for inductor and diode current rating selection |
| Open-Circuit Threshold | 42V - ensures automatic shutdown if LED string opens, preventing overvoltage damage to downstream components |
| UVLO Threshold | 2.45V rising - prevents startup below minimum Li-ion cell voltage (e.g., <2.5V under load) |
| Thermal Shutdown | 150°C - protects die during sustained overload or poor PCB thermal design without requiring external sensor |
| EN Dimming Range | 0.7–1.4V analog control - maps linearly to 0–100% LED current for precise brightness tuning |
Pinout & Package
The MP3301GJ-Z is housed in a thermally enhanced TSOT23-5 package with exposed pad connected to GND for improved heat dissipation. Pin 2 (GND) and the exposed pad must be soldered to a solid ground plane per JEDEC MO-193AA land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Drain of internal MOSFET | Connects to inductor and Schottky diode anode; swings from GND to up to 36V; requires short, low-inductance routing |
| 2 GND | Power and signal ground | Reference for FB, EN, and IN; exposed pad must be tied to PCB ground plane for thermal and electrical stability |
| 3 FB | Current-sense feedback input | Senses voltage across external Rsense (e.g., 10Ω for 20mA); regulated to 200mV; high-impedance node sensitive to noise |
| 4 EN | Enable and dimming control | Logic-level ON/OFF (0.4V/0.6V thresholds); analog dimming (0.7–1.4V); PWM dimming input (≥1.5V, 200Hz–1kHz) |
| 5 IN | Input supply | Accepts 2.5–6V; requires local 4.7µF ceramic bypass capacitor close to pin to suppress switching noise |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 700mA MOSFET | Eliminates need for external high-side switch and associated gate drive circuitry in boost topology |
| 1.3MHz fixed-frequency operation | Enables use of small, low-DCR inductors (e.g., 4.7µH) and ceramic output capacitors (e.g., 0.47µF) |
| 200mV feedback reference | Reduces I²R loss in current-sense resistor by 75% vs. typical 1V references, improving thermal performance at 20mA+ |
| Dual dimming interface | Single EN pin supports both analog (DC voltage) and PWM (square wave) dimming without external components |
| Open-load and thermal protection | Hardware-level fault responses (no firmware required) prevent catastrophic failure during LED open-circuit or PCB overheating |
Applications
| Smartphone Backlight | Digital Still Camera LCD |
|---|---|
|
Use Scenario: Driving 6–10 white LEDs in series for main display backlight in space-constrained mobile devices powered by single-cell Li-ion (3.0–4.2V). IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED string current via FB pin; EN pin used for system-level brightness control via PMIC or AP GPIO. Use Value: 89% peak efficiency and 1.3MHz switching minimize solution size and EMI, enabling direct integration into tight camera module PCB layouts. |
Use Scenario: Powering small-format color LCDs (2.4″–3.5″) in DSCs where input voltage varies from 3.0V (battery) to 5.5V (USB-powered mode). IC Role / Device Role / Timing Role: Fixed-frequency step-up driver delivering stable 20mA per LED; UVLO ensures reliable start-up even as battery discharges below 3.2V. Use Value: 200mV FB reference allows use of 10Ω sense resistor (vs. 50Ω for 1V ref), reducing board area and thermal rise in sealed camera enclosures. |
| Portable Medical Display | Industrial Handheld Terminal |
|
Use Scenario: Illuminating monochrome or color TFT displays in battery-operated medical monitors requiring long runtime and fail-safe LED control. IC Role / Device Role / Timing Role: Fault-tolerant LED driver with hardware open-load shutdown and thermal protection; FB pin directly interfaces with isolated current-sense amplifier for diagnostics. Use Value: 42V open-circuit threshold prevents overvoltage stress on display flex cables and ESD protection diodes during field-replaceable LED module failure. |
Use Scenario: Backlighting ruggedized LCDs in warehouse scanners or field meters operating across –20°C to +70°C ambient with wide-input 3.3V/5V rails. IC Role / Device Role / Timing Role: High-reliability boost driver supporting analog dimming via microcontroller DAC output on EN pin for adaptive brightness in varying ambient light. Use Value: Internal 700mA current limit and –40°C to +125°C junction rating ensure consistent performance without derating in unventilated industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED boost driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RT9397BZSP | Fixed 1.2MHz frequency; 250mV FB voltage; no integrated MOSFET (external switch required) | Requires external 1A MOSFET and gate driver; larger BOM and layout area; higher quiescent current (1.2mA vs. 0.9mA) | Choose when higher output voltage (>36V) or adjustable frequency is needed; avoid for space-constrained designs |
| LM3409MYX/NOPB | Adjustable 100kHz–1MHz frequency; 200mV FB; external MOSFET; no integrated EN dimming interface | Needs external PWM generator or DAC + op-amp for dimming; lacks open-load shutdown; wider input range (4.5–36V) | Prefer for automotive or 12V-input industrial systems where thermal margin >150°C is required; not drop-in for MP3301GJ-Z |
Compared with RT9397BZSP and LM3409MYX/NOPB, the MP3301GJ-Z offers smallest solution size due to integrated MOSFET and 1.3MHz operation, lowest FB voltage for minimal sense-resistor loss, and native dual-mode dimming-making it optimal for portable Li-ion-powered displays under 10W total LED load.
Availability
MP3301GJ-Z is available at Aetrix Electronics and suitable for smartphone backlighting, digital still camera LCDs, and portable medical displays requiring stable component supply, RoHS-compliant packaging, and guaranteed TSOT23-5 form factor consistency.
Supply support for MP3301GJ-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 core expertise in DC/DC conversion, LED drivers, and motor control solutions.
The MP3301 belongs to MPS's white LED backlight driver product line, engineered specifically for space- and efficiency-critical portable displays powered by single-cell lithium batteries.
FAQ
What is the maximum number of white LEDs the MP3301GJ-Z can drive in series?
The MP3301GJ-Z is rated to drive up to 10 white LEDs in series, assuming typical forward voltage of 3.2V per LED and maximum output voltage of 36V at the SW pin. At 32V total VF, the device maintains regulation with sufficient headroom before triggering 42V open-load shutdown.
Does the MP3301GJ-Z support PWM dimming without external components?
Yes-the EN pin accepts a 200Hz–1kHz square wave with amplitude ≥1.5V to directly control LED brightness via PWM. No external transistor, resistor, or RC network is required for standard-frequency PWM dimming.
How does the 200mV feedback voltage improve system efficiency?
A 200mV FB reference reduces power dissipation in the current-sense resistor by 80% compared to 1V references (P = I²R). For 20mA LED current, power loss drops from 20µW (1V/50Ω) to 4µW (0.2V/10Ω), lowering thermal load and enabling smaller resistors.
What happens during an open LED string condition?
When an LED opens, FB voltage falls to 0V, causing the controller to increase duty cycle until SW voltage reaches 42V. At that point, open-load protection shuts down the IC. Recovery requires a full power cycle-no automatic restart occurs.
Is the TSOT23-5 package thermally adequate for 700mA continuous operation?
Yes-when the exposed pad is soldered to a ≥1cm² copper pour on the PCB, the θJA of 220°C/W allows ~0.57W continuous dissipation at +25°C ambient. At 700mA and 0.5Ω RDS(on), power loss is ~245mW, well within thermal limits.
Can the MP3301GJ-Z operate from a 2.7V Li-ion battery throughout its discharge curve?
Yes-the 2.25V UVLO threshold ensures operation down to ~2.5V input, covering most of the usable Li-ion discharge range (3.0V–2.5V). Below 2.5V, the device shuts down cleanly without erratic behavior or current leakage.
What is the recommended inductor value for driving 8 white LEDs at 20mA?
MPS recommends a 4.7µH shielded power inductor with ≤150mΩ DCR for 8-LED operation. This value balances peak current ripple (~30%), efficiency (>87%), and physical size in TSOT23-5-based layouts, as validated in Figure 2 of the datasheet.
MP3301GJ-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 2.5V
- Voltage - Supply (Max):
- 6V
- Voltage - Output:
- 36V
- Current - Output / Channel:
- 1A (Switch)
- Frequency:
- 1.3MHz
- Dimming:
- Analog, PWM
- Applications:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MP3301GJ-Z FAQ
1.How can I place an order for MP3301GJ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3301GJ-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 MP3301GJ-Z reliable?
The price and inventory of MP3301GJ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3301GJ-Z is usually 5 days.
3.What payment methods are accepted for MP3301GJ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3301GJ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3301GJ-Z?
MP3301GJ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3301GJ-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 MP3301GJ-Z?
For technical support, including MP3301GJ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3301GJ-Z requirements.
6.How does Aetrix verify that MP3301GJ-Z is sourced from the original manufacturer or authorized distributors?
All MP3301GJ-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 MP3301GJ-Z meets industry standards.
7.What is the process for return or replacement of MP3301GJ-Z?
All MP3301GJ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3301GJ-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 MP3301GJ-Z part is unused and in its original packaging.
Return procedure for MP3301GJ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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