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

Monolithic Power Systems Inc. MP3216DJ-LF-P

Name: MP3216DJ-LF-P
Brand: Monolithic Power Systems Inc.
SKU: MP3216DJ-LF-P
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP3216DJ-LF-P

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

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

Datasheet:: MP3216DJ-LF-P.pdf

Description:: IC REG BOOST ADJ 750MA TSOT23-6

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Product details

Overview

MP3216DJ-LF-P from Monolithic Power Systems is a 36V, 1.3MHz step-up DC-DC converter with integrated 0.75A/0.6Ω N-channel power switch and output disconnect capability. It delivers regulated boost output up to 36V from 2.5–6V input, features cycle-by-cycle current limiting, 42V over-voltage shutdown, and operates in TSOT23-6 package for space-constrained portable power rails.

For engineers reviewing the MP3216DJ-LF-P datasheet, MP3216DJ-LF-P pinout, MP3216DJ-LF-P application, or MP3216DJ-LF-P equivalent, key selection criteria include its 1.3MHz fixed-frequency current-mode control, 1.24V feedback reference, output short protection (210mA inrush limit), and dual-package availability-TSOT23-6 enables full output disconnect while TSOT23-5 omits the L pin.

Technical Context

The MP3216DJ-LF-P implements a constant-frequency peak-current-mode boost architecture with internal 0.6Ω MOSFET and dedicated output disconnect switch (300mΩ N-MOSFET). Its 1.24V precision feedback reference and 92% max duty cycle support high-ratio voltage conversion while maintaining stability across load transients.

It integrates multiple protections: under-voltage lockout (2.45V rising threshold), thermal shutdown at 150°C, 42V over-voltage shutdown, and output short-circuit protection that limits inductor current to 210mA-preventing damage to external Schottky diodes and internal circuitry during fault conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5V to 6V - Supports single-cell Li-ion, USB, or 3.3V/5V rail inputs without external pre-regulation.
Output Voltage Range	Up to 36V - Programmable via resistor divider; enables high-brightness LED strings or sensor biasing.
Switching Frequency	1.3MHz (typ) - Enables compact LC filter design with sub-3µH inductors and <10µF ceramic output caps.
Internal Switch Rating	0.75A peak / 0.6Ω R_DS(on) - Limits conduction loss at 100mW per amp, suitable for ≤100mA continuous output loads.
Feedback Reference	1.24V ±20mV - High-accuracy reference enables ±1.6% output regulation over line/load/temperature.
Output Disconnect	Integrated 300mΩ N-MOSFET - Fully isolates load from input during shutdown, eliminating standby leakage paths.
OVP Threshold	42V - Hard shutdown prevents capacitor overvoltage and downstream component stress in open-feedback faults.

Pinout & Package

MP3216DJ-LF-P is housed in a thermally enhanced 6-pin TSOT23-6 package (0.95mm pitch, 2.9mm × 1.6mm footprint) with exposed pad for improved heat dissipation. Pin 1 is SW (switch node), Pin 2 is GND, Pin 3 is FB (feedback), Pin 4 is EN (enable), Pin 5 is IN (input supply), and Pin 6 is L (inductor connection to internal disconnect MOSFET source).

Pin/Terminal	Circuit Role	Design Meaning
SW (Pin 1)	Drain of internal power MOSFET	Connects to inductor and Schottky anode; carries high di/dt switching current; requires tight layout to minimize EMI.
GND (Pin 2)	Power and signal ground reference	Common return for input/output capacitors, feedback divider, and thermal pad; must be low-impedance plane.
FB (Pin 3)	Resistor-divider feedback input	Senses output voltage via 1.24V reference; high-impedance (70nA bias) allows use of high-value resistors to reduce quiescent current.
EN (Pin 4)	Enable control input	Active-high logic interface: ≥2V enables regulation; ≤0.8V disables IC and activates output disconnect.
IN (Pin 5)	Input supply and disconnect switch drain	Accepts 2.5–6V input; internal N-MOSFET connects/disconnects this node from L pin during enable/disable transitions.
L (Pin 6)	Inductor connection and disconnect switch source	Connects to inductor's free end; provides path for output disconnect-when disabled, isolates load from IN and SW nodes.

Key Features

Feature	Design Value
Integrated output disconnect switch	300mΩ N-MOSFET with dedicated L pin enables true load isolation-critical for battery-powered systems requiring zero standby current.
Output short-circuit protection	210mA inrush current limit during short events prevents thermal runaway and protects external B0540 Schottky diode.
Fixed 1.3MHz switching frequency	Enables use of small 2.2–10µH shielded inductors and 4.7–10µF X7R ceramic capacitors-reducing board area by >40% vs. 500kHz designs.
1.24V ±20mV feedback reference	Supports ±1.6% output accuracy over temperature without trimming; simplifies voltage-setting resistor selection (e.g., 133kΩ + 5.1kΩ for 33V).
Thermal and OVP protection	150°C junction shutdown and 42V hard OVP prevent catastrophic failure during overload, open-feedback, or transient overvoltage events.

Applications

Digital Still Cameras

Handheld Medical Sensors

Use Scenario: Powering CCD/CMOS image sensors requiring 28–33V bias from a 3.7V Li-ion battery.

IC Role / Device Role / Timing Role: Step-up converter with output disconnect ensures zero dark-current leakage when camera is idle.

Use Value: Extends battery life by eliminating standby discharge through sensor bias network during sleep mode.

Use Scenario: Generating stable 24V supply for piezoelectric transducer drivers in portable ultrasound probes.

IC Role / Device Role / Timing Role: High-PSRR boost regulator delivering low-noise, ripple-free voltage despite varying battery input.

Use Value: Maintains transducer excitation fidelity and signal-to-noise ratio across 3.0–4.2V battery range.

Industrial Handheld Scanners

Portable Spectrometers

Use Scenario: Supplying 30V to laser diode drivers in barcode scanners powered by 2xAA alkaline cells (1.8–3.2V).

IC Role / Device Role / Timing Role: Fixed-frequency current-mode controller ensures consistent laser pulse amplitude during rapid on/off cycling.

Use Value: Eliminates output droop during 100Hz+ trigger bursts, enabling reliable scan decode at >200 scans/sec.

Use Scenario: Biasing photomultiplier tubes (PMTs) requiring 35V from a 5V USB-C input in field-deployable analyzers.

IC Role / Device Role / Timing Role: Output disconnect and OVP protect sensitive PMT cathodes from accidental overvoltage during hot-plug events.

Use Value: Prevents irreversible gain degradation in PMTs caused by even brief >36V exposure.

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-up converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MP3217DJ-LF-Z	Same 6-pin TSOT23-6 package, but 2A switch (0.22Ω), 2.2MHz f_SW, 40V OVP	Higher output current capability (≤200mA), faster transient response, tighter output regulation at light loads	Select when scaling output power beyond 100mA or requiring lower output ripple at higher frequencies.
TPS61088RHLR	5.5V max input, 2.7A switch, 500kHz–2.2MHz programmable f_SW, no integrated output disconnect	Lacks dedicated L pin and output disconnect; requires external MOSFET for load isolation	Choose only if higher current (>150mA) is needed and board space permits external disconnect circuitry.

Compared with MP3216DJ-LF-P, MP3217DJ-LF-Z offers higher current and frequency at the cost of increased quiescent current (1.2mA vs. 0.65mA), while TPS61088RHLR trades output disconnect for greater peak current and flexible frequency tuning-making MP3216DJ-LF-P optimal for ultra-low-quiescent, space-constrained, zero-standby-power applications.

Availability

MP3216DJ-LF-P is available at Aetrix Electronics and suitable for portable medical devices, handheld industrial scanners, digital still cameras, and battery-powered test equipment requiring stable component supply with guaranteed long-term availability.

Supply support for MP3216DJ-LF-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 analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP3216 belongs to MPS's high-efficiency, small-footprint boost converter product line, engineered specifically for battery-powered portable electronics where minimal board area, low quiescent current, and robust fault protection are mandatory.

FAQ

What is the maximum recommended output current for MP3216DJ-LF-P at 33V output?

The MP3216DJ-LF-P supports up to 100mA continuous output current at 33V with 5V input, based on thermal limits in TSOT23-6 package (θ_JA = 220°C/W) and 0.75A switch rating. Efficiency drops below 75% above 80mA due to conduction and switching losses; derating is required for ambient temperatures >60°C.

Does MP3216DJ-LF-P require an external Schottky diode?

Yes, MP3216DJ-LF-P requires an external Schottky diode (e.g., B0540) connected between SW and VOUT. The IC integrates only the high-side switch and output disconnect MOSFET-not a synchronous rectifier-so the diode provides freewheeling path during switch-off cycles.

How does the output disconnect function behave during EN pin deactivation?

When EN falls below 0.8V, the MP3216DJ-LF-P disables the main switch and turns off the internal disconnect N-MOSFET (pin L), breaking the path between IN and the inductor. This fully isolates the output capacitor and load from input, reducing system standby current to <10µA.

Can MP3216DJ-LF-P operate with input voltage below 2.5V?

No-MP3216DJ-LF-P has a 2.25V UVLO threshold with 92mV hysteresis, and guaranteed operation starts at 2.5V. Below this, regulation fails and output collapses; it cannot bootstrap from 1.8V or 2.0V sources without external pre-biasing.

What is the purpose of the L pin, and why is it absent in TSOT23-5 variants?

The L pin connects to the source of the internal disconnect N-MOSFET, enabling full output isolation. TSOT23-5 packages omit this pin because they lack the second MOSFET-only the main switch is integrated, so output disconnect is not supported in MP3216GJE variants.

Is the 42V over-voltage protection resettable without power cycling?

No-the 42V OVP triggers a latched shutdown: once triggered, the device remains off until input power is fully removed and reapplied. There is no automatic recovery or flag pin; system-level monitoring must detect fault and initiate reset via EN pin toggling after root-cause correction.

What PCB layout practices are critical for stable MP3216DJ-LF-P operation?

Place input capacitor (≥4.7µF ceramic) within 2mm of IN/GND pins; route SW node with minimum loop area to inductor and diode; tie FB divider ground directly to GND pin (not plane); connect thermal pad to solid copper pour; keep EN and FB traces away from SW and inductor fields to avoid noise coupling.

MP3216DJ-LF-P 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:: Boost

Output Type:: Adjustable

Number of Outputs:: 1

Voltage - Input (Min):: 2.5V

Voltage - Input (Max):: 6V

Voltage - Output (Min/Fixed):: 2.5V

Voltage - Output (Max):: 36V (Switch)

Current - Output:: 750mA (Switch)

Frequency - Switching:: 1.3MHz

Synchronous Rectifier:: No

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TSOT-23-6

MP3216DJ-LF-P FAQ

1.How can I place an order for MP3216DJ-LF-P through Aetrix?

Please submit a Request for Quotation (RFQ) for MP3216DJ-LF-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 MP3216DJ-LF-P reliable?

The price and inventory of MP3216DJ-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP3216DJ-LF-P is usually 5 days.

3.What payment methods are accepted for MP3216DJ-LF-P?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3216DJ-LF-P transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP3216DJ-LF-P?

MP3216DJ-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP3216DJ-LF-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 MP3216DJ-LF-P?

For technical support, including MP3216DJ-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3216DJ-LF-P requirements.

6.How does Aetrix verify that MP3216DJ-LF-P is sourced from the original manufacturer or authorized distributors?

All MP3216DJ-LF-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 MP3216DJ-LF-P meets industry standards.

7.What is the process for return or replacement of MP3216DJ-LF-P?

All MP3216DJ-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP3216DJ-LF-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 MP3216DJ-LF-P part is unused and in its original packaging.

Return procedure for MP3216DJ-LF-P:

1.Submit a request within 90 days.

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

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