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

Monolithic Power Systems Inc. MP3217DJ-LF-Z

Name: MP3217DJ-LF-Z
Brand: Monolithic Power Systems Inc.
SKU: MP3217DJ-LF-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP3217DJ-LF-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

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

Datasheet:: MP3217DJ-LF-Z.pdf

Description:: IC REG BOOST ADJ 500MA TSOT23-6

Quantity:: RFQ Add To RFQ list

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Inventory:750

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Product details

Overview

MP3217DJ-LF-Z from Monolithic Power Systems is a monolithic 36V, 670kHz step-up DC-DC converter with an integrated 0.5A/0.6Ω internal MOSFET switch, fixed-frequency current-mode control, 1.24V feedback reference, and 42V over-voltage shutdown. It regulates output up to 33V from 5V input in portable APD bias applications.

For engineers reviewing the MP3217DJ-LF-Z datasheet, MP3217DJ-LF-Z pinout, MP3217DJ-LF-Z application, or MP3217DJ-LF-Z equivalent, key selection criteria include input voltage range (2.5–6V), output capability (up to 36V), thermal shutdown (150°C), cycle-by-cycle current limit, and TSOT23-6 package constraints for space-constrained designs.

Technical Context

The MP3217DJ-LF-Z implements a constant-frequency peak-current-mode boost architecture with a built-in 0.6Ω N-channel MOSFET switch and 1.24V precision feedback reference. Its PWM comparator compares the sensed inductor current (with slope compensation) against the error amplifier output to regulate duty cycle.

It integrates under-voltage lockout (2.45V rising threshold, 92mV hysteresis), 42V over-voltage shutdown, and thermal shutdown at 150°C. The EN pin provides 2V turn-on / 0.8V turn-off logic-level control, enabling automatic startup when floated to VIN.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.5V to 6V - supports single-cell Li-ion, 3.3V/5V rails, and battery-backed systems
Output Voltage Range	Up to 36V - enables high-voltage bias generation (e.g., 33V APD supply)
Switching Frequency	670kHz (±100kHz) - allows compact magnetics and low-output-ripple design
Internal Switch	0.5A current limit, 0.6Ω R_DS(on) - defines max continuous output power and thermal dissipation
Feedback Reference	1.24V ±2% - sets output via resistor divider; determines regulation accuracy and load linearity
OVP Threshold	42V - latches off until power recycle; prevents destructive overvoltage during feedback fault
UVLO Threshold	2.45V (rising), 92mV hysteresis - ensures clean startup and avoids brownout oscillation

Pinout & Package

MP3217DJ-LF-Z is housed in a RoHS-compliant 6-pin TSOT23 package (2.9mm × 1.6mm × 0.85mm), optimized for high-density portable PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1 PGND	Power Ground	Low-impedance return path for switch current; must be routed separately from signal GND to minimize noise coupling
2 GND	Signal Ground	Reference node for FB, EN, and internal regulator; ties to PGND at single point near IC
3 FB	Feedback Input	Senses output via resistive divider; 1.24V reference sets regulation point; sensitive to noise-requires local filtering
4 EN	Enable Control	Logic-compatible input: >2V = ON, <0.8V = OFF; floating connects to VIN for auto-start
5 IN	Input Supply	Connects to 2.5–6V source; requires local 4.7µF ceramic bypass capacitor placed adjacent to pin
6 SW	Switch Node	Drain of internal MOSFET; connects to inductor and Schottky diode anode; high dv/dt node requiring tight layout

Key Features

Feature	Design Value
Integrated 0.6Ω MOSFET	Eliminates external switch, reduces BOM count, and simplifies layout for 0.5A boost applications
Fixed 670kHz switching	Enables use of small, low-ESR ceramic capacitors and sub-3mm inductors without compromising efficiency
Cycle-by-cycle current limit	Provides robust short-circuit protection and stable operation under transient load steps up to 0.5A
42V over-voltage shutdown	Prevents catastrophic failure during open-feedback or resistor-divider fault conditions
TSOT23-6 footprint	Supports ultra-compact designs in handheld, camera, and optical sensor modules where board area is constrained

Applications

APD Bias Generation

Portable Medical Sensors

Use Scenario: Generating stable 33V bias for avalanche photodiode (APD) arrays in handheld spectrometers and laser rangefinders.

IC Role / Device Role / Timing Role: Primary boost regulator delivering regulated high-voltage bias with low ripple and fast load transient response.

Use Value: Enables precise photon detection sensitivity by maintaining <±1% output regulation across 0–10mA load variation.

Use Scenario: Powering optical pulse oximetry sensors in wearable health monitors with single-cell Li-ion input.

IC Role / Device Role / Timing Role: High-efficiency step-up stage converting 3.3V system rail to 7.5V for LED driver circuitry.

Use Value: Delivers >85% efficiency at 5mA load, extending battery life while meeting IEC 62304 safety requirements.

Digital Still Cameras

Handheld Industrial Scanners

Use Scenario: Supplying 28V flash LED driver circuits in compact digital cameras with 5V USB input.

IC Role / Device Role / Timing Role: Fast-transient boost converter synchronized to flash trigger timing with minimal delay.

Use Value: Achieves <10µs enable-to-output rise time and maintains <50mV output droop during 200mA flash pulses.

Use Scenario: Providing 12V auxiliary rail for CMOS image sensor and laser alignment subsystems in rugged barcode scanners.

IC Role / Device Role / Timing Role: Robust DC-DC stage operating across -40°C to +85°C ambient with thermal foldback protection.

Use Value: Sustains full 10mA output under thermal stress with automatic recovery after cooldown-no latch-up.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS61040DRBT	28V max output, 500kHz f_SW, 0.4A switch, 1.25V V_FB	Limited to lower output voltages; less suitable for 33V+ APD bias	Preferred for cost-sensitive 12–24V boost where size and OVP margin are secondary
MAX17062ETA+	36V max output, 1MHz f_SW, 0.6A switch, 1.22V V_FB, integrated soft-start	Higher quiescent current (850µA vs. 560µA); no UVLO hysteresis spec	Better for noise-sensitive imaging systems needing tighter EMI control and programmable soft-start

Compared with TPS61040DRBT and MAX17062ETA+, MP3217DJ-LF-Z offers superior OVP margin (42V), tighter V_FB tolerance (±2%), and lower thermal resistance (θ_JA = 220°C/W), making it optimal for space-constrained, high-reliability APD and portable optical applications.

Availability

MP3217DJ-LF-Z is available at Aetrix Electronics and suitable for APD bias generation, portable medical sensors, digital still cameras, and handheld industrial scanners requiring stable component supply and long-term manufacturability.

Supply support for MP3217DJ-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, headquartered in Kirkland, WA, with global design and support operations.

The MP3217 belongs to MPS's high-voltage boost converter product line, engineered specifically for compact, high-efficiency DC-DC conversion in optical sensing, portable imaging, and battery-powered instrumentation.

FAQ

What is the maximum recommended output voltage for MP3217DJ-LF-Z?

The MP3217DJ-LF-Z is rated for up to 36V output, with hard over-voltage shutdown triggered at 42V. For reliable long-term operation, design targets should remain ≤33V to maintain margin against tolerance stack-up in feedback resistors and temperature drift.

Can MP3217DJ-LF-Z operate from a 3.3V input?

Yes-its 2.5V to 6V input range fully supports 3.3V sources. At 3.3V input and 33V output, typical efficiency is ~78% at 5mA load, verified per Figure 5 in the datasheet. Layout must minimize trace resistance to sustain regulation under peak current demand.

Is an external Schottky diode required, and what specs are critical?

Yes-an external Schottky diode is mandatory. Critical specs include reverse voltage ≥36V (e.g., B0540), average current ≥10mA, and peak current ≥0.55A. Low forward voltage (<0.4V) and fast recovery (<10ns) minimize conduction loss and switching noise.

How does the EN pin behave when left unconnected?

When EN is left floating, internal circuitry pulls it to VIN, enabling automatic startup at power-on. This behavior is confirmed in the "PIN FUNCTIONS" section (page 4) and eliminates need for external pull-up in simple applications.

What is the thermal performance limitation in TSOT23-6 package?

In free-air conditions, θ_JA = 220°C/W limits continuous power dissipation to ~0.56W at 25°C ambient. At 125°C junction max, usable power drops to ~0.25W-requiring derating above 60°C ambient or adding copper pour for thermal relief.

Does MP3217DJ-LF-Z support synchronous rectification?

No-it uses an external Schottky diode and does not support synchronous rectification. The internal switch is a single N-channel MOSFET; no complementary driver or gate control for a second switch is provided in the architecture.

How is output voltage set, and what tolerance applies to the feedback divider?

Output voltage is set by a resistor divider from VOUT to FB, with V_FB = 1.24V ±2%. Using 1% resistors yields total output tolerance of ±3.5% worst-case; 0.1% R1/R2 improves this to ±2.2%, as validated in the "Setting the Output Voltage" section (page 8).

MP3217DJ-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:: 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:: 500mA (Switch)

Frequency - Switching:: 670kHz

Synchronous Rectifier:: No

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TSOT-23-6

MP3217DJ-LF-Z FAQ

1.How can I place an order for MP3217DJ-LF-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP3217DJ-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 MP3217DJ-LF-Z reliable?

The price and inventory of MP3217DJ-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 MP3217DJ-LF-Z is usually 5 days.

3.What payment methods are accepted for MP3217DJ-LF-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP3217DJ-LF-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP3217DJ-LF-Z?

MP3217DJ-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP3217DJ-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 MP3217DJ-LF-Z?

For technical support, including MP3217DJ-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP3217DJ-LF-Z requirements.

6.How does Aetrix verify that MP3217DJ-LF-Z is sourced from the original manufacturer or authorized distributors?

All MP3217DJ-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 MP3217DJ-LF-Z meets industry standards.

7.What is the process for return or replacement of MP3217DJ-LF-Z?

All MP3217DJ-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP3217DJ-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 MP3217DJ-LF-Z part is unused and in its original packaging.

Return procedure for MP3217DJ-LF-Z:

1.Submit a request within 90 days.

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

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