My Inquiry
My Account
Microchip Technology MIC2844AYMT-TR
- Part No.:
- MIC2844AYMT-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 10-UFDFN Exposed Pad, 10-TMLF®
- Datasheet:
-
MIC2844AYMT-TR.pdf
- Description:
- IC LED DRIVER LINEAR DIM 10TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:3,855
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC2844AYMT-TR from Micrel is a high-efficiency 6-channel linear white LED (WLED) driver IC designed for portable display backlighting, keypad illumination, and camera flash applications in mobile devices. It delivers ±1.5% typical current matching across all six channels, 40mV dropout at 20mA, and operates from 3.0V to 5.5V input voltage - enabling direct battery drive without switching noise or efficiency loss from boost converters.
For engineers reviewing the MIC2844AYMT-TR datasheet, MIC2844AYMT-TR pinout, MIC2844AYMT-TR application, or MIC2844AYMT-TR equivalent, this device offers single-wire digital dimming with 49 logarithmic brightness steps, Dynamic Average Matching™ (DAM™), and thermal shutdown protection - critical for compact, low-noise, battery-sensitive lighting systems.
Technical Context
The MIC2844AYMT-TR implements six independent linear current sources, each mirroring a master current set by an external RSET resistor (e.g., 20.5kΩ for 20mA). Its DAM™ architecture multiplexes four voltage references to achieve ±1.5% typical channel-to-channel current matching over full dimming range and temperature (–40°C to +125°C).
Digital control uses a single-wire interface with programmable timing windows: tSHUTDOWN = 1260µs for sleep mode entry, tMODE_UP = 100–160µs for Count Up mode, and tPROG_HIGH/tPROG_LOW = 2–32µs for valid edge detection. Phase-shifted 60° PWM outputs at ~700Hz reduce EMI during simultaneous dimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 5.5V - supports direct Li-ion/Li-poly battery operation without pre-regulation. |
| Dropout Voltage | 40mV at 20mA - enables >98% power efficiency and eliminates need for inefficient boost circuitry. |
| Current Matching | ±1.5% typical - ensures uniform luminance across 6 WLEDs in LCD backlight arrays. |
| Brightness Levels | 49 logarithmic steps - matches human eye perception and simplifies UI brightness control. |
| Digital Interface | Single-wire serial control - reduces GPIO count and PCB routing complexity vs. I²C/SPI. |
| Junction Temp Range | –40°C to +125°C - qualified for automotive infotainment and industrial handheld environments. |
| Shutdown Current | 0.01µA - extends standby battery life in always-on portable devices. |
Pinout & Package
Package: 10-pin 2mm × 2mm Thin MLF® (MT) leadless package with exposed thermal pad (EPAD) - RoHS-compliant, halogen-free mold compound, NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main power input | Supplies both control logic and linear drivers; requires ≥1µF ceramic bypass capacitor to GND for stability. |
| DC (Pin 2) | Digital control input | Single-wire interface for enable, dimming, mode change, and presetting; must not float - 200kΩ pull-down recommended. |
| RSET (Pin 3) | Current reference setting | Connects external resistor to GND to set peak LED current (e.g., 20.5kΩ → 20mA at 100% duty cycle). |
| GND (Pin 4) | Power and signal ground | Low-impedance return path for all channels; ground loop must be minimized per layout guidelines. |
| D6–D1 (Pins 5–10) | LED cathode drivers | Independent linear current sinks - each drives one WLED cathode; unused pins left unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Average Matching™ (DAM™) | Enables ±1.5% typical current matching across all six channels under varying temperature and supply conditions - critical for uniform display backlighting. |
| Single-wire digital dimming | Reduces system-level wiring and MCU GPIO usage while supporting 49 brightness levels with "set-and-forget" operation - no continuous PWM generation required. |
| 60° phase-shifted PWM outputs | Minimizes peak current draw and conducted EMI when driving multiple LEDs simultaneously - improves EMC compliance in dense portable layouts. |
| Parallel channel operation | Allows D1–D6 to be paralleled for up to 6× current (e.g., 120mA) - supports high-brightness flash/torch modes without external components. |
| Thermal shutdown protection | Automatically disables output drivers above safe junction temperature - prevents thermal runaway in sealed handheld enclosures. |
Applications
| Mobile Handset LCD Backlighting | Handset Keypad Illumination |
|---|---|
Use Scenario: Driving six white LEDs behind a 3.5″–5″ TFT-LCD panel in smartphones and feature phones. IC Role / Device Role / Timing Role: Linear WLED driver providing constant-current regulation and synchronized dimming via single-wire interface. Use Value: Eliminates switching noise that interferes with RF receivers and audio circuits, while extending battery runtime via 40mV dropout efficiency. |
Use Scenario: Uniformly illuminating alphanumeric keypads in low-light conditions for consumer handsets and ruggedized communication devices. IC Role / Device Role / Timing Role: Six-channel current source delivering matched brightness across discrete keys using minimal board space. Use Value: ±1.5% current matching ensures consistent visual appearance across keys; single-wire control simplifies integration with baseband processors. |
| Camera Flash/Torch Mode | Portable Media Player Backlighting |
Use Scenario: Delivering high-intensity burst illumination for smartphone cameras or sustained torch lighting in emergency devices. IC Role / Device Role / Timing Role: High-current parallel driver (D1–D6 combined) enabling up to 6× nominal channel current with precise thermal management. Use Value: Supports 120mA flash current without external MOSFETs or inductors - reduces BOM cost and PCB area vs. boost-based solutions. |
Use Scenario: Powering dual-row WLED backlights in MP3 players, GPS units, and portable navigation devices. IC Role / Device Role / Timing Role: Low-noise, battery-efficient backlight controller with logarithmic dimming aligned to user interface expectations. Use Value: 49-step dimming provides granular brightness control while maintaining >98% efficiency - critical for extended playback time on small batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 6-channel linear WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1698EUT+T | 4-channel, higher dropout (150mV), no single-wire interface - uses analog dimming or PWM input. | Limited to smaller displays; lacks DAM™ matching and logarithmic dimming. | Select only if channel count and digital control are not required; verify thermal derating for same LED load. |
| TPS61165DRVR | Inductive boost WLED driver (not linear); 1.2MHz switching frequency; 30V output capability. | Suitable for higher-Vf LED strings (>18V), but introduces EMI and lower efficiency than MIC2844AYMT-TR's linear architecture. | Choose only when driving series-connected WLEDs exceeding battery voltage - not a drop-in replacement. |
Compared with MAX1698EUT+T and TPS61165DRVR, the MIC2844AYMT-TR uniquely combines 6-channel linear operation, ±1.5% DAM™ matching, and single-wire digital control in a 2mm × 2mm package - making it optimal for noise-sensitive, space-constrained, multi-LED portable backlighting where efficiency and uniformity are prioritized over high-Vf string support.
Availability
MIC2844AYMT-TR is available at Aetrix Electronics and suitable for mobile handset LCD backlighting, keypad illumination, and camera flash applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC2844AYMT-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, low-noise ICs targeting portable and industrial markets.
The MIC2844AYMT-TR belongs to Micrel's WLED driver product line, engineered specifically for ultra-low-noise, high-efficiency backlighting in battery-powered mobile devices - emphasizing minimal EMI, precise current matching, and simplified digital control.
FAQ
What is the maximum LED current per channel for MIC2844AYMT-TR?
The MIC2844AYMT-TR supports up to 20mA per channel when configured with a 20.5kΩ RSET resistor at 100% duty cycle. Peak current scales inversely with RSET value per the formula ILED (mA) = 410 × ADC / RSET (kΩ), where ADC is average duty cycle. The device maintains regulation down to 40mV dropout, ensuring stable current even near battery end-of-life.
Does MIC2844AYMT-TR support parallel operation of multiple channels?
Yes, the MIC2844AYMT-TR allows D1 through D6 pins to be paralleled for higher-current applications - such as camera flash - delivering up to 6× the per-channel current (e.g., 120mA with 20mA/channel configuration). Each driver remains thermally isolated, and the internal current mirrors maintain accuracy when combined, as confirmed in the High Current Parallel Operation section of the datasheet.
How does the single-wire digital interface of MIC2844AYMT-TR work?
The MIC2844AYMT-TR uses its DC pin for all digital functions: enabling, dimming, mode selection (Count Up/Down), and brightness presetting. Pulses of precise duration (e.g., 1260µs for shutdown, 100–160µs for Count Up mode) are interpreted as commands. No clock or data lines are needed - timing-based edge detection eliminates protocol overhead and simplifies MCU firmware integration.
What is the purpose of Dynamic Average Matching™ (DAM™) in MIC2844AYMT-TR?
DAM™ in the MIC2844AYMT-TR is an architecture that multiplexes four precision voltage references to dynamically calibrate current mirrors across all six channels. This achieves ±1.5% typical current matching over temperature, supply variation, and dimming level - ensuring uniform brightness in multi-LED displays where visual consistency is critical, such as smartphone LCD backlights.
Can MIC2844AYMT-TR operate from a single-cell Li-ion battery?
Yes, the MIC2844AYMT-TR operates across 3.0V to 5.5V, fully covering the discharge curve of a single-cell Li-ion or Li-poly battery (4.2V–3.0V). Its 40mV dropout at 20mA allows it to sustain full LED current until battery voltage drops below ~3.04V - maximizing usable battery capacity without requiring a boost stage or LDO pre-regulator.
MIC2844AYMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-UFDFN Exposed Pad, 10-TMLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 6
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 20mA
- Frequency:
- -
- Dimming:
- Single-Wire
- Applications:
- Backlight, Camera Flash
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TMLF® (2x2)
MIC2844AYMT-TR FAQ
1.How can I place an order for MIC2844AYMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2844AYMT-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 MIC2844AYMT-TR reliable?
The price and inventory of MIC2844AYMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2844AYMT-TR is usually 5 days.
3.What payment methods are accepted for MIC2844AYMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2844AYMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2844AYMT-TR?
MIC2844AYMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2844AYMT-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 MIC2844AYMT-TR?
For technical support, including MIC2844AYMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2844AYMT-TR requirements.
6.How does Aetrix verify that MIC2844AYMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC2844AYMT-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 MIC2844AYMT-TR meets industry standards.
7.What is the process for return or replacement of MIC2844AYMT-TR?
All MIC2844AYMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2844AYMT-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 MIC2844AYMT-TR part is unused and in its original packaging.
Return procedure for MIC2844AYMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2844AYMT-TR Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
