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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Microchip Technology MIC2298-15YML-TR

Name: MIC2298-15YML-TR
Brand: Microchip Technology
SKU: MIC2298-15YML-TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MIC2298-15YML-TR

Manufacturer:: Microchip Technology

Category:: LED Drivers

Package:: 12-VFDFN Exposed Pad, 12-MLF®

Datasheet:: MIC2298-15YML-TR.pdf

Description:: IC LED DRVR RGLTR ANALOG 12MLF

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Product details

Overview

MIC2298-15YML-TR from Micrel is a 1MHz constant-frequency boost LED driver IC optimized for high-brightness white LED photoflash and torch applications, featuring 3.5A minimum switch current, 200mV feedback voltage, 2.5V–10V input range, 15V fixed over-voltage protection, and operation up to 30V output. It drives up to two 1A white LEDs in series from single- or dual-cell Li-ion batteries.

For engineers reviewing the MIC2298-15YML-TR datasheet, MIC2298-15YML-TR pinout, MIC2298-15YML-TR application, or MIC2298-15YML-TR equivalent, key selection criteria include programmable brightness control via BRT/SS-DIM pins, thermal shutdown at 150°C, 1µA shutdown current, MLF-12 package thermal resistance (θ_JA = 60°C/W), and OVP threshold accuracy (12–15V).

Technical Context

The MIC2298-15YML-TR implements peak current-mode PWM control with a fixed 1MHz oscillator, slope compensation, and a gm error amplifier comparing FB voltage against a 200mV internal reference. Its bipolar power switch delivers ≥3.5A continuous current with 350–500mV saturation voltage at 3.5A.

It integrates under-voltage lockout (2.1V typ), over-temperature shutdown (150°C), externally programmable soft-start via SS/DIM pin capacitance, and adjustable OVP using a resistor divider on the OVP pin-though the -15 variant fixes OVP at 15V. Feedback is derived from an external sense resistor connected between LED cathode and FB pin.

Key Specifications

Parameter	Value and Actual Design Meaning
Switch Current Limit	3.5A min - supports ≥7W output power into white LED strings even at elevated temperature
Feedback Voltage	200mV ±10% - enables low-loss current sensing with minimal ballast resistor power dissipation
Input Voltage Range	2.5V to 10V - directly powers from 1–2 cell Li-ion or 3–6 cell NiMH/alkaline battery sources
OVP Threshold	15V (fixed) - protects output stage if LED opens or FB shorts; prevents switch node overvoltage beyond 34V rating
Shutdown Current	0.1–1µA - extends battery life in flashlight/torch standby modes
Operating Frequency	1MHz (0.8–1.2MHz) - allows use of small, low-profile inductors (e.g., 4.7µH) and ceramic capacitors
Junction Temp Range	–40°C to +125°C - qualified for industrial and portable consumer environments including camera flash modules

Pinout & Package

The MIC2298-15YML-TR is housed in a Pb-free, halogen-free 12-pin 3mm × 3mm MLF® (MicroLeadFrame) package with exposed thermal pad (EP). This leadless, surface-mount package provides low θ_JA = 60°C/W and requires solder reflow per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
BRT	Brightness control input	10µA current source sets LED current from 20% to 100% of full scale; supports analog dimming or high-frequency PWM via RC filter
SS/DIM	Soft-start/dimming input	40kΩ internal pull-up; capacitor to GND controls startup ramp time; voltage clamp adjusts reference for analog current scaling
FB	Current-sense feedback node	Connects to LED cathode; regulates LED current via I_LED = 200mV / R_SENSE; low 650nA input bias minimizes error
AGND	Analog ground reference	Separate ground return for FB, COMP, and internal error amplifier to reduce noise coupling from power switching
PGND (Pins 5,6)	Power ground return	Low-impedance path for switch and inductor return current; must be tied to EP for thermal and EMI performance
SW (Pins 7,8)	Internal bipolar switch collector	Drives external inductor; rated for –0.3V to 34V; peak current limited to 6A absolute max
OVP	Over-voltage protection input	Fixed 15V threshold for MIC2298-15YML-TR; open-collector clamp disables switch if output exceeds threshold
VIN	Main supply input	2.5–10V input for internal circuitry and gate drive; includes UVLO (2.1V typ) and 15–23mA quiescent draw during operation
EN	Enable/disable control	Logic-level input: ≥1.5V enables regulator; ≤0.4V shuts down switching and reduces current to ≤1µA
COMP	Compensation network node	Transconductance amplifier output; external RC-to-GND sets loop stability zero (e.g., 1kΩ + 33nF → ~4.8kHz)
EP	Exposed thermal pad	Must be soldered to PCB ground plane for thermal conduction and EMI reduction; contributes to θ_JA = 60°C/W

Key Features

Feature	Design Value
Programmable torch/flash mode	Single BRT pin configures 20% (grounded), 50% (50kΩ), or 100% (≥1V) LED current - eliminates need for separate flash/torch drivers
Externally adjustable soft-start	SS/DIM pin accepts capacitor to GND (e.g., 100nF → ~12ms startup); prevents inrush current and output overshoot
Integrated over-temperature protection	Shuts down at 150°C junction temp with 10°C hysteresis - prevents thermal runaway during sustained flash bursts
Low 200mV feedback voltage	Reduces sense resistor power loss by >80% vs. typical 1V references - critical for efficiency in battery-powered flash systems
12-pin 3×3 mm MLF package	0.5mm pitch, 0.8mm height, exposed pad - enables ultra-compact camera module layouts while maintaining thermal performance

Applications

Cell Phone Flash	Digital Camera Flash
Use Scenario: High-current pulsed illumination for smartphone rear-camera photography in low-light conditions, operating from single-cell Li-ion (3.0–4.2V). IC Role / Device Role / Timing Role: Boost controller regulating constant-current drive to two-series 1A white LEDs; manages 300ms flash pulses at 3s intervals with thermal foldback. Use Value: Delivers ≥800mA peak current at 8.4V output while maintaining <1µA shutdown current between shots - maximizes battery cycle count and enables compact PCB layout.	Use Scenario: Dual-mode illumination in portable digital cameras: steady torch mode (50–100mA) and high-power flash mode (700–1000mA). IC Role / Device Role / Timing Role: LED driver with independent BRT and SS/DIM pins enabling seamless transition between analog-dimmed torch and full-current flash without MCU intervention. Use Value: 200mV FB reference and 1MHz switching allow use of 4.7µH inductor and 10µF ceramic output cap - reduces BOM cost and board area by >30% vs. lower-frequency alternatives.
White LED Flashlight	PDA Backlight & Indicator
Use Scenario: Handheld flashlight powered by 3–4 alkaline cells (4.5–6V), requiring stable 350mA output across battery discharge curve. IC Role / Device Role / Timing Role: Constant-current boost regulator with UVLO (2.1V) and line regulation <1% - maintains consistent LED brightness as input drops from 6V to 4.5V. Use Value: 15V OVP prevents capacitor overvoltage during open-circuit faults; 125°C max junction temp ensures reliability in enclosed plastic housings.	Use Scenario: Multi-function PDA with status indicators and low-power backlighting, operating from 3.3V rail with tight space constraints. IC Role / Device Role / Timing Role: Compact LED driver supporting both PWM-dimmed backlight (via BRT pin) and discrete indicator control (via EN pin toggling). Use Value: 3x3mm MLF package and integrated soft-start eliminate need for external timing components - reduces solution footprint to <12mm² including inductor and diode.

Cell Phone Flash

Digital Camera Flash

Use Scenario: High-current pulsed illumination for smartphone rear-camera photography in low-light conditions, operating from single-cell Li-ion (3.0–4.2V).

IC Role / Device Role / Timing Role: Boost controller regulating constant-current drive to two-series 1A white LEDs; manages 300ms flash pulses at 3s intervals with thermal foldback.

Use Value: Delivers ≥800mA peak current at 8.4V output while maintaining <1µA shutdown current between shots - maximizes battery cycle count and enables compact PCB layout.

Use Scenario: Dual-mode illumination in portable digital cameras: steady torch mode (50–100mA) and high-power flash mode (700–1000mA).

IC Role / Device Role / Timing Role: LED driver with independent BRT and SS/DIM pins enabling seamless transition between analog-dimmed torch and full-current flash without MCU intervention.

Use Value: 200mV FB reference and 1MHz switching allow use of 4.7µH inductor and 10µF ceramic output cap - reduces BOM cost and board area by >30% vs. lower-frequency alternatives.

White LED Flashlight

PDA Backlight & Indicator

Use Scenario: Handheld flashlight powered by 3–4 alkaline cells (4.5–6V), requiring stable 350mA output across battery discharge curve.

IC Role / Device Role / Timing Role: Constant-current boost regulator with UVLO (2.1V) and line regulation <1% - maintains consistent LED brightness as input drops from 6V to 4.5V.

Use Value: 15V OVP prevents capacitor overvoltage during open-circuit faults; 125°C max junction temp ensures reliability in enclosed plastic housings.

Use Scenario: Multi-function PDA with status indicators and low-power backlighting, operating from 3.3V rail with tight space constraints.

IC Role / Device Role / Timing Role: Compact LED driver supporting both PWM-dimmed backlight (via BRT pin) and discrete indicator control (via EN pin toggling).

Use Value: 3x3mm MLF package and integrated soft-start eliminate need for external timing components - reduces solution footprint to <12mm² including inductor and diode.

Equivalent & Alternatives

The following parts are listed as comparable options for similar LED driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX8630YETA+	1.2MHz boost, 2.7–5.5V input, 32V OVP, 2.5A switch, 32-pin QFN	Designed for multi-LED RGB+white arrays in smartphones; lacks dedicated BRT pin	Prefer MIC2298-15YML-TR for single-string high-current flash where BRT-based analog dimming simplifies firmware
TPS61310DSKR	1.5MHz boost, 2.7–5.5V input, 28V OVP, 2.2A switch, 10-pin WSON	Lower switch current, no integrated OVP clamp, requires external MOSFET for >1A loads	Choose MIC2298-15YML-TR when driving ≥2×1A LEDs directly from Li-ion without external FETs or OVP resistors

Compared with MAX8630YETA+ and TPS61310DSKR, the MIC2298-15YML-TR offers higher switch current (3.5A vs. ≤2.5A), native 15V OVP clamping, and dedicated BRT/SS-DIM dual-control architecture - making it optimal for cost-sensitive, space-constrained photoflash designs requiring analog brightness programming and robust fault protection.

Availability

MIC2298-15YML-TR is available at Aetrix Electronics and suitable for cell phone flash modules, digital camera illumination systems, and portable LED flashlight designs requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for MIC2298-15YML-TR 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

Micrel Inc. was a U.S.-based semiconductor company specializing in analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015. Known for high-reliability, application-optimized ICs.

The MIC2298 product line was developed specifically for portable white LED flash and torch applications, emphasizing high-efficiency boost conversion, integrated protection features, and minimal external component count in ultra-small packages.

FAQ

What is the maximum output voltage supported by the MIC2298-15YML-TR?

The MIC2298-15YML-TR supports up to 30V output voltage, but its fixed over-voltage protection (OVP) threshold is set to 15V. If the output exceeds 15V - for example, due to LED open-circuit or FB short - the internal switch disables to protect the IC and external components. The 30V limit reflects the absolute maximum switch node rating, not the regulated operating range.

Can the MIC2298-15YML-TR drive more than two white LEDs in series?

No - the MIC2298-15YML-TR is characterized and specified to drive up to two 1A white LEDs in series, assuming typical V_f ≤ 4.2V per LED (max 8.4V total). Driving three or more LEDs would require >12.6V output, exceeding practical efficiency and thermal limits given the 3.5A switch current and 60°C/W thermal resistance. The SOA curves confirm DC current capability degrades rapidly above 8.4V output.

How does the BRT pin function in the MIC2298-15YML-TR?

The BRT pin on the MIC2298-15YML-TR is a 10µA current source that sets LED current proportionally: grounding BRT yields 20% full brightness, leaving it open gives 100%, and connecting a resistor (e.g., 50kΩ) yields 50%. It also accepts high-frequency PWM (>5kHz) via an RC filter to achieve smooth analog-like dimming without visible flicker - a key feature distinguishing MIC2298-15YML-TR from basic enable-controlled drivers.

Is the MIC2298-15YML-TR pin-compatible with other variants in the MIC2298 family?

Yes - all MIC2298 variants, including MIC2298-12YML-TR and MIC2298-18YML-TR, share identical 12-pin 3×3mm MLF packaging, pinout, and electrical interface. Only the OVP threshold differs (12V, 15V, or 18V), so substituting MIC2298-15YML-TR for another variant requires verifying that 15V OVP aligns with the system's maximum safe output voltage and LED string configuration.

What external components are mandatory for basic operation of the MIC2298-15YML-TR?

Four external components are mandatory: (1) an inductor (typically 4.7µH), (2) a Schottky diode (rated ≥ output voltage and ≥ peak inductor current), (3) a feedback sense resistor (R_SENSE = 200mV / I_LED), and (4) input/output ceramic capacitors (≥1µF each, X5R/X7R). The COMP pin requires an RC network for stability, and BRT/SS-DIM may need passive components depending on dimming method - but these are not strictly mandatory for basic enable-on operation.

MIC2298-15YML-TR Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 12-VFDFN Exposed Pad, 12-MLF®

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: DC DC Regulator

Topology:: Step-Up (Boost)

Internal Switch(s):: Yes

Number of Outputs:: 1

Voltage - Supply (Min):: 2.5V

Voltage - Supply (Max):: 10V

Voltage - Output:: 15V

Current - Output / Channel:: 3.5A (Switch)

Frequency:: 1MHz

Dimming:: Analog

Applications:: Camera Flash

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 12-MLF™ (3x3)

MIC2298-15YML-TR FAQ

1.How can I place an order for MIC2298-15YML-TR through Aetrix?

Please submit a Request for Quotation (RFQ) for MIC2298-15YML-TR 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 MIC2298-15YML-TR reliable?

The price and inventory of MIC2298-15YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2298-15YML-TR is usually 5 days.

3.What payment methods are accepted for MIC2298-15YML-TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2298-15YML-TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MIC2298-15YML-TR?

MIC2298-15YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MIC2298-15YML-TR 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 MIC2298-15YML-TR?

For technical support, including MIC2298-15YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2298-15YML-TR requirements.

6.How does Aetrix verify that MIC2298-15YML-TR is sourced from the original manufacturer or authorized distributors?

All MIC2298-15YML-TR 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 MIC2298-15YML-TR meets industry standards.

7.What is the process for return or replacement of MIC2298-15YML-TR?

All MIC2298-15YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2298-15YML-TR, 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 MIC2298-15YML-TR part is unused and in its original packaging.

Return procedure for MIC2298-15YML-TR:

1.Submit a request within 90 days.

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

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