My Inquiry
My Account
Monolithic Power Systems Inc. MP3370GN-Z
- Part No.:
- MP3370GN-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP3370GN-Z.pdf
- Description:
- IC LED DRIVER LINEAR PWM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,124
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP3370GN-Z from Monolithic Power Systems is a fixed-frequency, peak-current-mode boost LED driver IC with integrated 50V/100mΩ low-side MOSFET and precision current-source regulation. It delivers up to 38V output voltage, supports 300mA LED current (set via ISET resistor), and operates across 3.5V–36V input range-ideal for medium-current LCD backlighting with PWM or analog dimming control.
For engineers reviewing the MP3370GN-Z datasheet, MP3370GN-Z pinout, MP3370GN-Z application, or MP3370GN-Z equivalent, key selection criteria include its 400kHz switching frequency, 43.5V over-voltage protection threshold, thermal shutdown at 150°C, SOIC8-EP package with exposed pad for thermal management, and dual-dimming mode detection on EN/DIM pin.
Technical Context
The MP3370GN-Z implements a fixed-frequency (350–450kHz) peak-current-mode boost topology with internal 5V LDO (VCC) powering gate drive and control logic. Its error amplifier output (COMP) interfaces with external RC compensation to stabilize loop response across wide VIN/VOUT/ILED operating ranges.
Dimming mode is auto-detected: EN/DIM pin accepts <1kHz PWM for duty-cycle-controlled LED current chopping, >5kHz PWM for proportional analog current scaling, and sustained low-level signal (>20ms) for full disable. Protection includes cycle-by-cycle current limiting (3A), latch-off short-circuit detection, open/short LED sensing, and SW-pin-based 43.5V OVP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 36V - supports automotive battery (12V/24V) and industrial DC rails without pre-regulation. |
| Max Output Voltage | 38V - drives up to 12-series white LEDs (VF ≈ 3.2V) in single-string configuration. |
| LED Current Accuracy | ±2.5% at 300mA - achieved via 1.2V ISET reference and matched internal current sense. |
| Switching Frequency | 400kHz typical - enables compact magnetics (e.g., 22µH inductor) and reduces EMI fundamental. |
| Internal MOSFET RDS(on) | 100mΩ @ 50V - minimizes conduction loss in high-current boost path; rated for 3A peak. |
| OVP Threshold | 43.5V - protects downstream LEDs and capacitors during open-string fault or transient overvoltage. |
| Thermal Shutdown | 150°C junction - latches off until die cools below hysteresis threshold, preventing permanent damage. |
Pinout & Package
MP3370GN-Z is housed in a thermally enhanced SOIC8-EP (exposed pad) package. The exposed pad must be soldered to a PCB copper pour tied to GND for optimal thermal performance (θJC = 10°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Input power supply input | Accepts 3.5–36V DC; connects to bulk input capacitor and feeds internal LDO and switch driver. |
| 2 VCC | 5V regulated output | Provides stable 5V for internal logic/gate drive; requires local 1µF ceramic decoupling to GND. |
| 3 EN/DIM | Enable and dimming control | Three-mode pin: enable/disable (DC level), PWM dimming (<1kHz), analog dimming (>5kHz). |
| 4 COMP | Error amplifier output | Drives external RC compensation network to set loop bandwidth and phase margin. |
| 5 ISET | LED current programming | 1.2V reference node; current set by resistor to GND (e.g., 24.9kΩ → 300mA). |
| 6 LED | LED string cathode connection | Sinks regulated current from LED anode; used with open/short fault detection circuitry. |
| 7 GND | Power and signal ground | Common return for VIN, VCC, ISET, LED, and exposed pad; critical for noise immunity. |
| 8 SW | Switch node | Drain of internal N-MOSFET; connects to boost inductor and rectifier diode anode. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 50V/100mΩ MOSFET | Eliminates external high-voltage switch; reduces BOM count and layout area while maintaining 3A peak capability. |
| Dual-dimming mode auto-detection | EN/DIM pin interprets signal frequency to select PWM or analog dimming without external mode-select logic. |
| Comprehensive fault protection | Includes UVLO, OVP (43.5V), open/short LED detection, inductor/diode short latch-off, and thermal shutdown. |
| Soft-start and cycle-by-cycle current limit | Prevents inrush current stress at startup; limits peak inductor current per switching cycle to protect components. |
| SOIC8-EP thermal design | Exposed pad lowers θJA to 50°C/W (4-layer PCB); enables >2.5W continuous dissipation at 25°C ambient. |
Applications
| Automotive Instrument Cluster Backlighting | Industrial HMI Panel Lighting |
|---|---|
|
Use Scenario: Driving 8–12 white LEDs in series behind TFT-LCD for vehicle dashboard displays under 12V battery supply with wide temperature range. IC Role / Device Role / Timing Role: Boost LED driver with current-source regulation and analog dimming for smooth brightness control synchronized to ambient light sensor output. Use Value: ±2.5% current accuracy ensures uniform luminance across LED strings; 43.5V OVP prevents damage during load dump transients. |
Use Scenario: Powering edge-lit LED arrays in ruggedized factory-floor HMIs exposed to 24V DC industrial power with EMI constraints. IC Role / Device Role / Timing Role: Fixed-frequency (400kHz) boost controller delivering stable 300mA current with PWM dimming for user-adjustable brightness. Use Value: SOIC8-EP package enables reliable thermal performance at 85°C ambient; cycle-by-cycle current limit protects against inductor saturation faults. |
| Medical Diagnostic Display Backlight | Commercial Point-of-Sale Terminal Lighting |
|
Use Scenario: Illuminating high-resolution diagnostic monitors requiring flicker-free, color-stable backlighting with precise dimming resolution. IC Role / Device Role / Timing Role: Analog-dimming-capable LED driver using high-frequency PWM on EN/DIM to achieve >1000:1 dimming ratio without visible artifacts. Use Value: 1.2V ISET reference and matched current sense ensure consistent LED current across unit-to-unit variation and temperature drift. |
Use Scenario: Cost-sensitive retail kiosks using 6–10 white LEDs in series powered from 12V wall adapter with minimal board space. IC Role / Device Role / Timing Role: Integrated boost + current source eliminates external MOSFET and current-sense resistor, reducing component count and assembly cost. Use Value: Internal 5V LDO (VCC) powers gate driver directly-no need for auxiliary regulator; 3.5V minimum VIN supports brownout operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT3466-1 (Analog Devices) | Higher 40V max output; requires external MOSFET; 1.2MHz switching; no integrated VCC LDO. | Better suited for ultra-compact designs needing higher frequency; lacks analog dimming auto-detect. | Select when higher switching frequency and external FET flexibility outweigh integration benefits. |
| TPS61165 (Texas Instruments) | 36V max output; integrated 40V/0.5Ω FET; 1.2MHz; only PWM dimming support; no analog dimming mode. | Optimized for portable lighting with smaller inductors; lacks dual-dimming intelligence and OVP margin. | Choose for battery-powered devices prioritizing size and efficiency over dimming versatility. |
Compared with LT3466-1 and TPS61165, MP3370GN-Z offers superior integration (integrated 50V/100mΩ FET + 5V LDO), wider OVP margin (43.5V vs. 36–40V), and unique EN/DIM auto-detection for both PWM and analog dimming-reducing system-level complexity in industrial and automotive backlighting.
Availability
MP3370GN-Z is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial HMI panels, medical diagnostic displays, and commercial point-of-sale terminals requiring stable component supply and long-term manufacturability.
Supply support for MP3370GN-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 power management ICs, including DC/DC converters, LED drivers, and motor drivers for industrial, automotive, and consumer markets.
The MP3370 belongs to MPS's high-voltage boost LED driver product line, designed specifically for medium-current, single-string backlighting applications demanding high integration, robust protection, and flexible dimming control.
FAQ
What is the recommended inductor value for MP3370GN-Z at 12V input and 300mA LED current?
A 22µH shielded power inductor with ≥1.5A saturation current is recommended per the datasheet's typical application circuit. This value ensures Continuous Conduction Mode (CCM) operation with ~40% inductor ripple current at 400kHz switching frequency and maintains stability across input voltage variations from 3.5V to 36V.
How does the MP3370GN-Z detect and respond to an open LED string?
The MP3370GN-Z monitors voltage at the LED pin relative to SW. During open-string fault, LED pin voltage drops near GND while SW voltage rises toward OVP threshold (43.5V). Once SW exceeds this threshold, the IC latches off and requires power cycle or EN/DIM reset to resume operation.
Can the MP3370GN-Z operate with input voltage below 3.5V?
No. The absolute minimum operating input voltage is 3.5V, and the UVLO rising threshold is 3.0V (typical). Below 3.5V, the device cannot sustain regulation or maintain internal bias; operation below this range risks undefined behavior or failure to start.
What is the purpose of the VCC pin, and why is a capacitor required there?
VCC is the output of an internal 5V LDO that powers the gate driver and internal logic. A 1µF ceramic capacitor placed close to VCC and GND suppresses high-frequency noise from switching events and ensures stable gate drive voltage-critical for MOSFET turn-on consistency and overall efficiency.
Does the MP3370GN-Z support constant-voltage (CV) mode in addition to constant-current (CC) mode?
No. The MP3370GN-Z is a dedicated constant-current LED driver. Its feedback loop regulates LED current via the ISET pin and LED pin sensing; it does not provide voltage regulation or CV mode functionality. Output voltage is determined solely by LED forward voltage and string configuration.
How is thermal performance affected if the exposed pad is not soldered to GND?
Leaving the exposed pad unconnected increases θJA by >30°C/W, severely degrading thermal resistance. Without thermal connection to GND plane, junction temperature can exceed 150°C at moderate load, triggering thermal shutdown and causing intermittent operation or premature failure.
What is the minimum PWM dimming frequency supported in PWM dimming mode?
The MP3370GN-Z enters PWM dimming mode when EN/DIM signal frequency is below 1kHz. While functional down to ~100Hz, stable dimming performance is confirmed from 200Hz upward per typical waveforms-lower frequencies may cause visible flicker or inconsistent current settling.
MP3370GN-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 3.5V
- Voltage - Supply (Max):
- 36V
- Voltage - Output:
- 3V ~ 38V
- Current - Output / Channel:
- -
- Frequency:
- 400kHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight, Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
MP3370GN-Z FAQ
1.How can I place an order for MP3370GN-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP3370GN-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 MP3370GN-Z reliable?
The price and inventory of MP3370GN-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3370GN-Z is usually 5 days.
3.What payment methods are accepted for MP3370GN-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3370GN-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP3370GN-Z?
MP3370GN-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP3370GN-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 MP3370GN-Z?
For technical support, including MP3370GN-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3370GN-Z requirements.
6.How does Aetrix verify that MP3370GN-Z is sourced from the original manufacturer or authorized distributors?
All MP3370GN-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 MP3370GN-Z meets industry standards.
7.What is the process for return or replacement of MP3370GN-Z?
All MP3370GN-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3370GN-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 MP3370GN-Z part is unused and in its original packaging.
Return procedure for MP3370GN-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP3370GN-Z Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
