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Microchip Technology MIC2293C-34YML-TR
- Part No.:
- MIC2293C-34YML-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-VFDFN Exposed Pad, 8-MLF®
- Datasheet:
-
MIC2293C-34YML-TR.pdf
- Description:
- IC LED DRVR RGLTR PWM 750MA 8MLF
- Quantity:
- Payment:
- Shipping:
Inventory:737
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Product details
Overview
MIC2293C-34YML-TR from Micrel is a 2MHz constant-frequency PWM boost LED driver IC optimized for constant-current white LED backlighting. It integrates a 500mA bipolar switch, internal Schottky diode, and 34V output overvoltage protection (OVP), operating from 2.5V–10V input to drive up to six series LEDs in portable devices such as GPS systems and digital cameras.
For engineers reviewing the MIC2293C-34YML-TR datasheet, MIC2293C-34YML-TR pinout, MIC2293C-34YML-TR application, or MIC2293C-34YML-TR equivalent, key selection criteria include its 2MHz switching frequency for compact external components, 95mV feedback reference for precise current regulation, 34V OVP threshold, thermal shutdown, and compatibility with ceramic input/output capacitors.
Technical Context
The MIC2293C-34YML-TR implements constant-frequency current-mode PWM control using an internal 2.0MHz oscillator, slope-compensated ramp generator, and transconductance error amplifier referenced to 95mV. Its bipolar output switch delivers up to 500mA peak current with 450mV saturation voltage at 0.5A.
It features dual ground pins (AGND and PGND) for analog/digital separation, dedicated OVP monitoring tied to the OUT pin, and EN pin logic-level enable/disable with <1µA shutdown current. The device supports both PWM and continuous dimming via EN and FB pins respectively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2.0MHz ±0.25MHz - enables use of small 10µH inductors and avoids RF interference bands. |
| Feedback Voltage | 95mV ±10mV - sets LED current via external sense resistor; enables accurate constant-current regulation. |
| OVP Threshold | 34V nominal (27–37V range) - clamps output to protect LEDs and IC during open-circuit or overvoltage fault. |
| Input Voltage Range | 2.5V to 10V - supports direct operation from 1–2-cell Li-ion or 3–4-cell alkaline/NiMH batteries. |
| Switch Current Limit | 750mA typical - provides robust short-circuit and overload protection for the integrated bipolar transistor. |
| Shutdown Current | <1µA at VEN = 0V - minimizes battery drain in standby mode for portable applications. |
| Junction Temp Range | –40°C to +125°C - ensures reliable operation in automotive and industrial ambient environments. |
Pinout & Package
Package: 8-pin 2mm × 2mm MLF® (MicroLeadFrame) with exposed thermal pad (EP/GND), Pb-free finish, θJA = 93°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Output & OVP Sense | Connects to output capacitor and LED anodes; monitors output voltage for 34V OVP clamp activation. |
| 2 - VIN | Power Input | Supplies 2.5V–10V input; powers internal circuitry and switch driver; requires local 1µF ceramic decoupling. |
| 3 - EN | Enable Control | Active-high logic input; high ≥1.5V enables switching; low ≤0.4V disables regulator and reduces IQ to <1µA. |
| 4 - AGND | Analog Ground | Reference ground for FB, OVP, and error amplifier; must be routed separately from PGND to minimize noise coupling. |
| 5 - NC | No Connect | Unbonded die pad; must remain floating; no PCB trace or solder connection permitted. |
| 6 - FB | Current Sense Input | Connects to LED cathode via sense resistor; 95mV reference sets ILED = 95mV / RSENSE. |
| 7 - SW | Switch Node | Collector of internal bipolar transistor; connects to inductor and Schottky anode; handles 2A absolute max voltage swing. |
| 8 - PGND | Power Ground | High-current return path for switch and Schottky; ties to exposed pad (EP) for thermal conduction. |
| EP - GND | Thermal Pad | Exposed copper pad on underside; must be soldered to large PCB ground plane for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky Diode | Eliminates external rectifier; reduces BOM count and board area while maintaining efficiency across load range. |
| 2MHz Fixed-Frequency PWM | Enables use of 10µH inductors and 0.22µF ceramic output capacitors - cuts solution size by >40% vs. 500kHz alternatives. |
| Dual-Ground Architecture | Separate AGND and PGND pins minimize switching noise injection into feedback loop, improving current regulation stability. |
| Open-Circuit Protection | 34V OVP actively clamps output during LED string failure or disconnection, preventing SW node overvoltage damage. |
| Soft-Start Compatibility | FB pin accepts external soft-start capacitor (e.g., 2200pF) to limit inrush current during power-up without added components. |
Applications
| Cell Phone Backlighting | GPS System Display |
|---|---|
Use Scenario: Driving 3–6 white LEDs in ultra-thin smartphone LCD backlight modules powered by single-cell Li-ion battery. IC Role / Device Role / Timing Role: Constant-current boost controller regulating LED current via 95mV FB reference and 2MHz PWM switching. Use Value: Compact 2mm×2mm MLF package and 2MHz operation allow minimal external component footprint while avoiding cellular IF bands. | Use Scenario: Powering high-brightness LED backlight for outdoor-readable GPS display operating from 3.6V nominal supply. IC Role / Device Role / Timing Role: High-efficiency boost driver delivering stable current under wide input voltage variation (3.0–4.2V). Use Value: 34V OVP protects against open-string faults in harsh vibration environments; –40°C to +125°C rating ensures reliability in vehicle cabins. |
| Digital Camera Flash/Backlight | IP Phone Keypad Illumination |
Use Scenario: Simultaneous backlighting and flash support in compact digital cameras using shared Li-ion battery and space-constrained PCB. IC Role / Device Role / Timing Role: Dual-mode driver supporting PWM dimming (via EN) and analog dimming (via FB voltage injection) for flexible brightness control. Use Value: <1µA shutdown current extends battery life between shots; internal Schottky eliminates layout-sensitive external diode placement. | Use Scenario: Low-power keypad LED illumination in VoIP desk phones requiring long operational life on 5V USB or PoE-derived supply. IC Role / Device Role / Timing Role: Efficient step-up converter driving parallel LED strings with precise current matching via 95mV reference. Use Value: Ceramic capacitor compatibility simplifies filtering; UVLO prevents erratic startup below 2.1V, ensuring clean power-on sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED boost driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16832AATA+T | 1.2MHz switching, 40V OVP, external MOSFET required, no integrated Schottky. | Requires external high-side switch and rectifier; larger solution size but higher efficiency at >500mA loads. | Select when higher output current (>500mA) or adjustable OVP threshold is required; not drop-in compatible. |
| TPS61165DRVR | 1.2MHz switching, 38V OVP, integrated MOSFET and Schottky, 400mA switch rating. | Lower switch current limit and different FB reference (200mV); requires redesign of current-sense resistor. | Choose for TI ecosystem designs where 200mV FB simplifies DAC-based dimming; verify thermal performance at full load. |
Compared with MIC2293C-34YML-TR, MAX16832AATA+T offers higher OVP flexibility but demands more external components, while TPS61165DRVR provides similar integration at lower current capability and a non-compatible feedback reference - both require PCB layout and BOM changes.
Availability
MIC2293C-34YML-TR is available at Aetrix Electronics and suitable for cell phone backlighting, GPS system displays, and digital camera LED drivers requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for MIC2293C-34YML-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.
The MIC2292/93C product line was designed specifically for space-constrained, battery-powered white LED backlighting applications demanding high-frequency operation, integrated protection, and minimal external component count.
FAQ
What is the maximum output voltage supported by the MIC2293C-34YML-TR?
The MIC2293C-34YML-TR features 34V output overvoltage protection (OVP), meaning it actively clamps the output voltage to approximately 34V during fault conditions such as open LED strings. Its practical output voltage depends on input voltage, inductor selection, and LED forward voltage - typically up to ~32V under normal operation with proper external component sizing.
Does the MIC2293C-34YML-TR require an external Schottky diode?
No, the MIC2293C-34YML-TR integrates a Schottky diode internally, eliminating the need for an external rectifier. This reduces bill-of-materials count, saves PCB area, and improves reliability by removing a potential point of failure - confirmed in the datasheet's "Features" and "Functional Diagram" sections.
What is the purpose of the NC pin (Pin 5) on the MIC2293C-34YML-TR?
Pin 5 of the MIC2293C-34YML-TR is designated NC (No Connect) and has no internal connection to the silicon die. It must remain unconnected on the PCB - no trace, solder, or pull-up/pull-down component should be attached. This is explicitly stated in the "Pin Description" table of the official datasheet.
Can the MIC2293C-34YML-TR drive six series white LEDs?
Yes, the MIC2293C-34YML-TR can drive up to six series white LEDs, as validated in the "Typical Characteristics" section showing 6-series LED efficiency curves and confirmed in the "Applications" list. With typical white LED VF ≈ 3.2V each, six LEDs require ~19.2V, well within the 34V OVP limit and achievable using recommended 10µH inductors and 0.22µF output capacitors.
How does dimming work on the MIC2293C-34YML-TR?
The MIC2293C-34YML-TR supports two dimming methods: (1) PWM dimming via the EN pin - applying a 100Hz–10kHz logic signal toggles the entire regulator on/off; (2) continuous dimming via the FB pin - injecting a DC control voltage (e.g., from a DAC) scales the 95mV reference to linearly adjust LED current without flicker.
MIC2293C-34YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad, 8-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:
- -
- Current - Output / Channel:
- 750mA (Switch)
- Frequency:
- 2MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MLF® (2x2)
MIC2293C-34YML-TR FAQ
1.How can I place an order for MIC2293C-34YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2293C-34YML-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 MIC2293C-34YML-TR reliable?
The price and inventory of MIC2293C-34YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2293C-34YML-TR is usually 5 days.
3.What payment methods are accepted for MIC2293C-34YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2293C-34YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2293C-34YML-TR?
MIC2293C-34YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2293C-34YML-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 MIC2293C-34YML-TR?
For technical support, including MIC2293C-34YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2293C-34YML-TR requirements.
6.How does Aetrix verify that MIC2293C-34YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2293C-34YML-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 MIC2293C-34YML-TR meets industry standards.
7.What is the process for return or replacement of MIC2293C-34YML-TR?
All MIC2293C-34YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2293C-34YML-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 MIC2293C-34YML-TR part is unused and in its original packaging.
Return procedure for MIC2293C-34YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2293C-34YML-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
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