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Monolithic Power Systems Inc. MP23701GQEU-P
- Part No.:
- MP23701GQEU-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 8-UDFN
- Datasheet:
-
MP23701GQEU-P.pdf
- Description:
- 24V, 2A, 1.5MHZ, SYNCHRONOUS,STE
- Quantity:
- Payment:
- Shipping:
Inventory:1,321
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Product details
Overview
MP23701GQEU-P from Monolithic Power Systems is a 24V, 2A, synchronous step-down white LED driver IC with integrated 100mΩ high-side MOSFET and 80mΩ low-side synchronous rectifier, operating at fixed 1.5MHz switching frequency and supporting deep analog dimming via EN/DIM pin (0.7–1.44V range). It delivers up to 97% efficiency in UTQFN-8 (1.5mm×2.5mm) package and is used in handheld computer backlight and infrared LED illumination systems requiring precise current regulation.
For engineers reviewing the MP23701GQEU-P datasheet, MP23701GQEU-P pinout, MP23701GQEU-P application, or MP23701GQEU-P equivalent, key selection considerations include its 100mV feedback reference, NTC-based thermal foldback, cycle-by-cycle current limiting, open-LED protection, and 2A continuous output capability under 4.2–24V input.
Technical Context
The MP23701GQEU-P implements peak-current mode control with internal error amplifier comparing FB voltage against 100mV reference, generating COMP signal to regulate high-side switch conduction time. Its fixed 1.5MHz oscillator ensures predictable EMI profile and enables compact external passive selection.
It integrates dual protection logic: output short-circuit detection triggers 2.4ms hiccup-mode restart after overcurrent threshold (5.5A typical) violation, while NTC monitoring uses internal 58μA pull-up to scale LED current linearly with ambient temperature rise - shutting off output when NTC voltage falls below 0.41V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.2V to 24V - supports wide industrial and battery-powered LED systems including 12V/24V rails and multi-cell Li-ion inputs. |
| Output Current | Up to 2A continuous - sufficient for driving 1–2 high-brightness white LEDs or multiple infrared LEDs in series. |
| Switching Frequency | Fixed 1.5MHz - enables use of small 2.2–4.7μH inductors and reduces audible noise in portable applications. |
| Feedback Reference | 100mV ±7mV - allows precise current-sense resistor selection (e.g., 50mΩ for 2A) with minimal power loss. |
| Efficiency | Up to 97% - achieved via synchronous rectification and low RDS(on) (100mΩ HS / 80mΩ LS), reducing thermal load in space-constrained designs. |
| Dimming Control | Analog dimming via EN/DIM pin (0.7–1.44V) - provides smooth, flicker-free brightness control without PWM filtering components. |
| Thermal Protection | NTC-based foldback + 150°C junction thermal shutdown - protects LEDs from overheating and prevents IC damage during sustained overload. |
Pinout & Package
MP23701GQEU-P is housed in a thermally enhanced UTQFN-8 package (1.5mm × 2.5mm, 0.5mm pitch), optimized for high-power density LED driver layouts with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NC | No connection | Unused pad; must remain unconnected and floating per layout guidelines. |
| 2 VIN | Input supply rail | Accepts 4.2–24V unregulated input; requires local 10μF ceramic capacitor to suppress switching transients. |
| 3 SW | Power switch node | Drives external inductor; connects to BST capacitor anode and carries high di/dt current - must be routed short and wide. |
| 4 GND | Power and signal ground | Primary reference for FB, EN/DIM, and NTC; requires solid thermal pad connection and dedicated low-impedance plane. |
| 5 BST | Bootstrap supply | Forms floating gate drive for high-side MOSFET; requires 0.1μF X7R ceramic capacitor between BST and SW. |
| 6 EN/DIM | Enable and analog dimming input | Logic-level on/off control (0.59V threshold) and 0.7–1.44V analog dimming interface - no external pull-up needed. |
| 7 FB | Current sense feedback | Monitors voltage across sense resistor; internal 100mV reference sets LED current (ILED = 0.1V / RSENSE). |
| 8 NTC | Thermal foldback input | Connects to NTC thermistor; internal 58μA current source generates voltage inversely proportional to temperature - enables automatic LED derating. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated 80mΩ low-side switch eliminates external Schottky diode, reducing conduction loss and board area. |
| Deep analog dimming | Linear 0–100% LED current control via single DC voltage (0.7–1.44V), eliminating need for external PWM generator or filter. |
| Inherent open-LED protection | Auto-detects open-circuit condition by monitoring FB voltage; forces max duty cycle while maintaining safe voltage clamp. |
| Cycle-by-cycle current limiting | Hardware-based overcurrent protection triggers within one switching cycle (5.5A typical limit), preventing inductor saturation damage. |
| NTC thermal foldback | Adjusts LED current in real time using external NTC - avoids thermal runaway in enclosed lighting modules without microcontroller intervention. |
Applications
| Infrared LED Illumination | Handheld Computer Backlight |
|---|---|
|
Use Scenario: IR LED array in night-vision security cameras or biometric sensors requiring silent, non-flickering illumination. IC Role / Device Role / Timing Role: Constant-current LED driver with analog dimming for adaptive IR intensity control based on ambient light or detection range. Use Value: Fixed 1.5MHz operation avoids IR interference bands; NTC foldback prevents lens fogging due to LED heating. |
Use Scenario: Backlight for ruggedized tablet displays operating from 12V vehicle power or Li-ion battery packs. IC Role / Device Role / Timing Role: High-efficiency buck LED driver delivering stable 1.5A to 2-series WLED strings with minimal thermal footprint. Use Value: 97% efficiency and UTQFN-8 package enable >2W LED power in <4mm² PCB area; EN/DIM supports system-level brightness scaling. |
| Portable Flashlight Driver | Industrial Status Indicator |
|
Use Scenario: High-lumen tactical flashlight powered by 2S/3S Li-ion batteries with runtime optimization and thermal safety. IC Role / Device Role / Timing Role: Primary current regulator with UVLO (3.7V turn-on), soft-start, and thermal shutdown to prevent cell over-discharge and LED degradation. Use Value: 4.2–24V input range accommodates 2S (7.4V) to 3S (11.1V) Li-ion; analog dimming enables intuitive user interface without MCU. |
Use Scenario: Panel-mounted status indicator in factory HMIs or medical equipment where reliability and long-term current stability are critical. IC Role / Device Role / Timing Role: Precision LED current source with open-LED fault reporting and SCP to ensure fail-safe visual signaling under wiring faults. Use Value: Inherent open-LED and short-circuit protection eliminate need for external fault monitoring circuitry; 100mV FB reference ensures ±7% current accuracy over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ23701GQEU-P | Automotive-grade AEC-Q100 qualified version with extended temp range (−40°C to +125°C) and enhanced ESD (4kV HBM). | Required for automotive interior lighting, dashboard indicators, and ADAS IR illuminators subject to automotive qualification. | Select MPQ23701GQEU-P when operating environment exceeds industrial temperature limits or automotive compliance is mandated. |
| LT3466-1EDD#TRPBF | 40V input, 1.2A output, 1MHz switching, no integrated low-side FET - requires external Schottky diode and higher BOM count. | Suitable for higher-voltage LED strings (e.g., 4–6 WLEDs) but less efficient and larger than MP23701GQEU-P in 2A, 1–2 LED applications. | Choose LT3466-1EDD#TRPBF only if input exceeds 24V or legacy design reuse mandates non-synchronous topology. |
Compared with MPQ23701GQEU-P, the MP23701GQEU-P offers lower cost and identical electrical performance for industrial use, while LT3466-1EDD#TRPBF trades integration for higher input voltage tolerance - making MP23701GQEU-P optimal for compact, high-efficiency 2A LED systems at ≤24V.
Availability
MP23701GQEU-P is available at Aetrix Electronics and suitable for infrared illumination systems, handheld computer backlighting, portable flashlights, and industrial status indicators requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.
Supply support for MP23701GQEU-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 power management ICs, with design centers in the US, China, and Taiwan.
The MP23701 belongs to MPS's LED driver product line, engineered specifically for compact, high-efficiency constant-current LED applications demanding analog dimming, thermal intelligence, and robust fault protection in space-constrained portable and industrial systems.
FAQ
What is the minimum input voltage required to start MP23701GQEU-P?
The MP23701GQEU-P has a guaranteed turn-on threshold of 3.7V (typical) with 0.12V hysteresis, meaning it starts switching when VIN rises above 3.7V and remains active until VIN drops below 3.58V. This UVLO behavior ensures reliable startup from partially discharged 2S Li-ion batteries (6.4V nominal) and avoids brown-out oscillation.
Can MP23701GQEU-P drive more than two white LEDs in series?
No - the MP23701GQEU-P is optimized for 1–2 white LEDs (typical VF = 2.8–3.4V each), yielding ~6V output maximum. Driving three or more LEDs would exceed its practical output voltage headroom under 24V input and risk instability due to reduced duty cycle margin and increased sensitivity to layout parasitics.
How does the NTC thermal foldback function without a microcontroller?
The MP23701GQEU-P integrates a 58μA current source connected to the NTC pin; as ambient temperature rises, the NTC resistance drops, lowering the NTC pin voltage. When this voltage falls below 0.41V, the IC linearly reduces LED current to zero - all implemented in analog hardware with no firmware or external logic required.
Is an external bootstrap capacitor mandatory, and what value is recommended?
Yes - a 0.1μF X7R ceramic capacitor is mandatory between BST and SW pins to sustain gate drive for the internal high-side MOSFET. This capacitor must be placed within 2mm of the IC with short, wide traces; failure to do so causes erratic switching or complete failure to start due to insufficient bootstrap voltage (<4.8V).
Does MP23701GQEU-P support PWM dimming in addition to analog dimming?
No - the MP23701GQEU-P supports analog dimming only via the EN/DIM pin voltage (0.7–1.44V). It does not include dedicated PWM input or internal PWM-to-analog conversion; adding external PWM requires RC filtering and risks introducing noise into the sensitive EN/DIM node, degrading dimming linearity.
What is the maximum allowable PCB copper area for the thermal pad under UTQFN-8?
MPS recommends a minimum 12mm² exposed thermal pad (2.4mm × 5mm) with ≥4 thermal vias (0.3mm diameter, filled or plated) connecting to inner-layer ground planes. Exceeding this improves θJA from 90°C/W to ≤65°C/W, enabling full 2A operation at +85°C ambient without derating.
How does open-LED protection behave during startup?
During startup, if no LED string is connected, the MP23701GQEU-P enters maximum-duty-cycle mode and clamps output voltage near VIN. The FB pin remains at 0V, triggering inherent protection - no latch-up occurs, and the device resumes normal regulation immediately upon LED connection without requiring reset or power cycle.
MP23701GQEU-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 8-UDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.2V
- Voltage - Supply (Max):
- 24V
- Voltage - Output:
- -
- Current - Output / Channel:
- 2A
- Frequency:
- 1.5MHz
- Dimming:
- Analog
- Applications:
- Backlight, Camera Flash
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-UTQFN (1.5x2.5)
MP23701GQEU-P FAQ
1.How can I place an order for MP23701GQEU-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP23701GQEU-P 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 MP23701GQEU-P reliable?
The price and inventory of MP23701GQEU-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP23701GQEU-P is usually 5 days.
3.What payment methods are accepted for MP23701GQEU-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP23701GQEU-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP23701GQEU-P?
MP23701GQEU-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP23701GQEU-P 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 MP23701GQEU-P?
For technical support, including MP23701GQEU-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP23701GQEU-P requirements.
6.How does Aetrix verify that MP23701GQEU-P is sourced from the original manufacturer or authorized distributors?
All MP23701GQEU-P 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 MP23701GQEU-P meets industry standards.
7.What is the process for return or replacement of MP23701GQEU-P?
All MP23701GQEU-P units undergo pre-shipment inspection (PSI). If there is an issue with MP23701GQEU-P, 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 MP23701GQEU-P part is unused and in its original packaging.
Return procedure for MP23701GQEU-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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