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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Monolithic Power Systems Inc. MPQ9361DJ-LF-Z

Name: MPQ9361DJ-LF-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ9361DJ-LF-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ9361DJ-LF-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: SOT-23-6 Thin, TSOT-23-6

Datasheet:: MPQ9361DJ-LF-Z.pdf

Description:: IC REG CHARGE PUMP 5V TSOT23-6

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Inventory:2,674

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Product details

Overview

MPQ9361DJ-LF-Z from Monolithic Power Systems is a regulated 2× charge pump DC/DC converter delivering a fixed 5V output with ±200mV regulation over 2.8V–5V input, 110mA max load, 30mV ripple, and 1.35MHz switching frequency in TSOT23-6. It enables compact LED backlight and camera flash power in space-constrained portable electronics.

For engineers reviewing the MPQ9361DJ-LF-Z datasheet, MPQ9361DJ-LF-Z pinout, MPQ9361DJ-LF-Z application, or MPQ9361DJ-LF-Z equivalent, key selection factors include its industrial-grade temperature range (−40°C to +85°C), integrated soft-start for in-rush current control, and absence of external inductors-critical for PDA, remote control, and LCD display supply designs.

Technical Context

The MPQ9361 implements a fixed-frequency (1.35MHz) switched-capacitor voltage doubler architecture with internal feedback sensing via resistor divider and comparator-based mode control. Regulation is achieved by enabling/disabling the charge pump stage based on output voltage deviation from 5V reference.

It integrates thermal shutdown (~145°C junction), short-circuit protection (60–150mA trip), and over-current protection (250–500mA), with enable logic (VEN(H)=1.5V, VEN(L)=0.4V) and internal soft-start to limit in-rush during startup and mode transitions.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 5.0V ±200mV across −40°C to +85°C; ensures stable bias for white LEDs and LCD drivers.
Input Range	2.8V to 5.0V; supports single-cell Li-ion (fully discharged) up to USB-powered operation without external LDO.
Max Output Current	110mA continuous; sufficient for driving 3–5 parallel white LEDs at ~20mA each.
Switching Frequency	1.35MHz (±250kHz); enables use of small 0.22µF flying capacitor and minimizes EMI in RF-sensitive handhelds.
Output Ripple	30mV peak-to-peak at 60mA load; meets low-noise requirements for analog sensor or display bias rails.
Quiescent Current	2–4mA at no load; reduces standby power loss in battery-operated remotes and PDAs.
Enable Threshold	V_EN(H) = 1.5V, V_EN(L) = 0.4V; compatible with 1.8V/3.3V GPIO without level-shifting.

Pinout & Package

MPQ9361DJ-LF-Z is housed in a lead-free, RoHS-compliant TSOT23-6 package (0.95mm × 1.60mm × 0.85mm), optimized for high-density PCB layouts in portable devices.

Pin/Terminal	Circuit Role	Design Meaning
1 - OUT	Regulated output node	Delivers 5V to load; requires ≥2.2µF ceramic decoupling (≥10µF if I_OUT > 60mA).
2 - GND	Power ground reference	Low-impedance return path for charge pump switching currents; must be connected directly to PCB ground plane.
3 - EN	Logic-enable input	Active-high control: drives device ON when >1.5V, OFF when <0.4V; supports PWM dimming via external signal.
4 - CN	Flying capacitor negative terminal	Connects to negative side of 0.22µF flying cap; forms charge transfer path with CP pin.
5 - IN	Input power supply	Accepts 2.8V–5V source; requires local 2.2µF ceramic input capacitor near pin.
6 - CP	Flying capacitor positive terminal	Connects to positive side of 0.22µF flying cap; alternates polarity with CN to double input voltage.

Key Features

Feature	Design Value
Industrial temperature range	Guaranteed operation from −40°C to +85°C ambient, supporting deployment in automotive infotainment remotes and outdoor handhelds.
Integrated soft-start	Gradually ramps output during startup and mode change, limiting in-rush current to prevent input rail sag in shared battery systems.
Short-circuit protection	Auto-recovery shutdown at 60–150mA fault current, preventing damage during LED string open/short events.
Fixed 1.35MHz oscillator	Eliminates external timing components and enables predictable EMI filtering with small passive components.
TSOT23-6 footprint	Standardized 6-pin SMT package with JEDEC MO-193 compliance, enabling drop-in replacement and automated assembly compatibility.

Applications

Cell Phone LED Backlight

Smartphone Camera Flash

Use Scenario: Driving 3–5 white LEDs in series for front-panel illumination in low-power smartphones.

IC Role / Device Role / Timing Role: Regulated 5V charge pump supplying constant-current LED driver IC input rail.

Use Value: Eliminates inductor, reduces board area by >30% vs. inductive boost converters, and maintains <30mV ripple for flicker-free display backlighting.

Use Scenario: Providing burst-mode 5V power to high-intensity white LED flash circuits during photo capture.

IC Role / Device Role / Timing Role: High-efficiency voltage doubler enabling fast turn-on (<100µs) and precise PWM-controlled flash duration.

Use Value: Internal soft-start prevents battery voltage droop during flash activation; 110mA capability supports dual-LED flash configurations.

PDA LCD Display Supply

TV Remote Control Power

Use Scenario: Generating clean 5V bias for TFT LCD source driver ICs in handheld computing devices.

IC Role / Device Role / Timing Role: Low-noise regulated output stage ensuring stable gate-source voltage for display pixel transistors.

Use Value: 30mV output ripple avoids visible horizontal banding; −40°C to +85°C rating ensures reliability in uncontrolled environments.

Use Scenario: Powering IR LED driver and microcontroller in energy-sensitive TV remote controls using single alkaline cell.

IC Role / Device Role / Timing Role: Efficient step-up converter extending battery life by maintaining 5V output down to 2.8V input (near end-of-life).

Use Value: 2–4mA quiescent current minimizes standby drain; EN pin allows full system shutdown between button presses.

Equivalent & Alternatives

The following parts are listed as comparable options for similar regulated charge pump applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS60403DBVR	Fixed 5V output, 60mA max, 1MHz switching, SOIC-8 package	Lower output current and larger footprint; lacks industrial temp rating (−40°C to +85°C)	Prefer MPQ9361DJ-LF-Z for higher current, smaller size, and extended temperature compliance.
MAX682ESA+	Adjustable output (1.5V–5.5V), 100mA max, 1.2MHz, SOIC-8	Requires external resistors for feedback; no integrated soft-start or short-circuit protection	Choose MPQ9361DJ-LF-Z when fixed 5V, robust protection, and simplified BOM are required.

Compared with TPS60403DBVR and MAX682ESA+, the MPQ9361DJ-LF-Z delivers 110mA output in a 30% smaller TSOT23-6 package, includes guaranteed industrial temperature operation and comprehensive fault protection-making it optimal for compact, reliable portable power rails.

Availability

MPQ9361DJ-LF-Z is available at Aetrix Electronics and suitable for cell phone LED backlight, smartphone camera flash, and PDA LCD display supply requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MPQ9361DJ-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.

The MPQ9361 belongs to MPS's industrial-grade charge pump product line, engineered specifically for compact, inductorless DC/DC conversion in battery-powered portable electronics where size, efficiency, and reliability are critical.

FAQ

What is the minimum input voltage required for stable 5V output?

The MPQ9361DJ-LF-Z requires a minimum input voltage of 2.8V to maintain regulated 5V output across its full operating temperature range (−40°C to +85°C). Below 2.8V, regulation is not guaranteed and output drops proportionally; typical operation begins at 2.8V with full 110mA capability above 3.2V input.

Can the MPQ9361DJ-LF-Z drive multiple white LEDs directly?

No-it is not an LED driver IC. The MPQ9361DJ-LF-Z provides a regulated 5V supply rail; external constant-current LED driver ICs (e.g., AL8805, CAT4137) must be used to control LED current. Its 110mA output supports drivers powering up to five 20mA white LEDs in parallel configurations.

Is an external flying capacitor mandatory, and what value is recommended?

Yes-a 0.22µF X7R ceramic capacitor is mandatory between CP (Pin 6) and CN (Pin 4). This capacitor enables the 2× charge pump operation. Use 0603 or 0805 case size with ≤200mΩ ESR; values outside 0.20–0.25µF degrade efficiency and increase ripple beyond specification.

Does the MPQ9361DJ-LF-Z support PWM dimming control?

Yes-via the EN pin. Applying a PWM signal (100Hz–2kHz, logic-level compatible) directly to EN enables brightness control by modulating the 5V output duty cycle. Internal soft-start ensures smooth transitions without current spikes, preserving LED lifetime and minimizing EMI.

What thermal protection behavior occurs during overload?

Under sustained overload or elevated ambient temperature, the MPQ9361DJ-LF-Z triggers thermal shutdown at ~145°C junction temperature. Output disables until die cools by ~15°C, then auto-restarts. This cycle repeats until fault condition clears-no latch-up or manual reset required.

How does the MPQ9361DJ-LF-Z differ from inductive boost converters in layout impact?

It eliminates the magnetic component: no inductor means no EMI shielding, no saturation concerns, and no PCB area reserved for magnetics. Layout requires only three small ceramic capacitors (IN, OUT, CP/CN), reducing total passive count by 30–50% and simplifying routing in tight 4-layer mobile PCBs.

MPQ9361DJ-LF-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: SOT-23-6 Thin, TSOT-23-6

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Step-Up

Output Configuration:: Positive

Topology:: Charge Pump

Output Type:: Fixed

Number of Outputs:: 1

Voltage - Input (Min):: 2.8V

Voltage - Input (Max):: 5V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Current - Output:: 110mA

Frequency - Switching:: 1.35MHz

Synchronous Rectifier:: No

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TSOT-23-6

MPQ9361DJ-LF-Z FAQ

1.How can I place an order for MPQ9361DJ-LF-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ9361DJ-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 MPQ9361DJ-LF-Z reliable?

The price and inventory of MPQ9361DJ-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 MPQ9361DJ-LF-Z is usually 5 days.

3.What payment methods are accepted for MPQ9361DJ-LF-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ9361DJ-LF-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ9361DJ-LF-Z?

MPQ9361DJ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ9361DJ-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 MPQ9361DJ-LF-Z?

For technical support, including MPQ9361DJ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ9361DJ-LF-Z requirements.

6.How does Aetrix verify that MPQ9361DJ-LF-Z is sourced from the original manufacturer or authorized distributors?

All MPQ9361DJ-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 MPQ9361DJ-LF-Z meets industry standards.

7.What is the process for return or replacement of MPQ9361DJ-LF-Z?

All MPQ9361DJ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ9361DJ-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 MPQ9361DJ-LF-Z part is unused and in its original packaging.

Return procedure for MPQ9361DJ-LF-Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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