My Inquiry
My Account
Microchip Technology MIC2293-34BML-TR
- Part No.:
- MIC2293-34BML-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-VFDFN Exposed Pad, 8-MLF®
- Datasheet:
-
MIC2293-34BML-TR.pdf
- Description:
- IC LED DRVR RGLTR PWM 750MA 8MLF
- Quantity:
- Payment:
- Shipping:
Inventory:3,275
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC2293-34BML-TR from Microchip Technology is a high-frequency PWM boost regulator optimized for constant-current white LED driver applications, featuring 2.0 MHz switching frequency, 34V output overvoltage protection, internal Schottky diode, 500 mA switch current rating, and operation from 2.5V to 10V input. It targets compact backlighting in portable consumer electronics requiring stable current regulation and minimal external components.
For engineers reviewing the MIC2293-34BML-TR datasheet, MIC2293-34BML-TR pinout, MIC2293-34BML-TR application, or MIC2293-34BML-TR equivalent, this device offers verified 2 mm × 2 mm DFN-8 packaging, precise 95 mV feedback reference, <1% line/load regulation, and integrated OVP-critical for LED string reliability in space-constrained designs.
Technical Context
The MIC2293-34BML-TR implements constant-frequency current-mode PWM control with a dedicated 2.0 MHz oscillator, slope compensation ramp generator, and gm error amplifier referenced to 95 mV. Its bipolar output transistor delivers up to 500 mA peak switch current while maintaining stable operation with ceramic capacitors only.
It integrates open-circuit protection via dedicated 34V OVP monitoring, uses an internal Schottky diode rated for 34V reverse voltage and 150 mA forward current, and features undervoltage lockout (2.1 V typical) and thermal shutdown (150°C threshold) to ensure robust operation across –40°C to +125°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2.0 MHz - Enables use of ultra-small inductors and ceramic capacitors; avoids RF interference in IF bands. |
| Feedback Voltage | 95 mV ±5% - Sets LED current via external sense resistor; enables accurate constant-current regulation. |
| OVP Threshold | 34 V - Protects against LED open-circuit failure; allows selection of lower-voltage-rated output capacitors. |
| Input Voltage Range | 2.5 V to 10 V - Supports direct operation from 1–2-cell Li-ion or 3–4-cell alkaline/NiMH batteries. |
| Switch Current Limit | 750 mA typical - Limits peak inductor current during startup or fault conditions; ensures safe transient handling. |
| Shutdown Current | 0.1 µA typical - Minimizes battery drain in standby; supports long battery life in portable devices. |
| Line/Load Regulation | <1% - Maintains stable LED current despite input voltage or load variations; critical for uniform brightness. |
Pinout & Package
The MIC2293-34BML-TR is housed in a thermally enhanced 2 mm × 2 mm, 0.9 mm height DFN-8 package with exposed pad (EP) for improved heat dissipation. Pin 1 is marked by a dot; pins 4 and 8 are AGND/PGND, and EP connects internally to ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Output / OVP Sense | Connects to output capacitor and LED anode; monitors output voltage for 34V overvoltage protection. |
| 2 VIN | Power Input | Accepts 2.5–10 V supply; powers internal circuitry and switch; includes UVLO at 2.1 V typical. |
| 3 EN | Enable Control | Logic HIGH (≥1.5 V) enables regulation; logic LOW disables switching and reduces quiescent current to 0.1 µA. |
| 4, 8 AGND/PGND | Analog & Power Ground | Separate ground returns minimize noise coupling; both connect to system ground and EP. |
| 5 NC | No Connect | Not bonded; must be left floating or tied to GND per layout best practice (no internal connection). |
| 6 FB | Current Sense Input | Connects to LED cathode via external resistor; 95 mV reference sets LED current (ILED = 95 mV / RFB). |
| 7 SW | Switch Node | Drives external inductor; sees up to 34 V swing; requires careful PCB routing to minimize EMI. |
| EP | Thermal Pad / GND | Exposed copper pad on bottom; must be soldered to large PCB ground plane for thermal and electrical performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky Diode | Eliminates external diode; reduces BOM count and board area; rated for 34 V reverse voltage and 150 mA forward current. |
| Dual Dimming Support | Enables both PWM dimming (via EN pin) and analog dimming (via FB pin voltage injection), supporting flexible brightness control schemes. |
| Stable with Ceramic Capacitors | Removes need for electrolytic or tantalum output capacitors; improves reliability and reduces footprint in portable designs. |
| Open-Circuit Protection | Prevents destructive overvoltage during LED string disconnection by clamping output at 34 V using dedicated OVP circuitry. |
| Soft-Start Compatibility | Supports external soft-start capacitor on FB pin to limit inrush current during startup, protecting LEDs and input source. |
Applications
| Cell Phone Backlighting | GPS System Display |
|---|---|
Use Scenario: Driving 3–4 white LEDs in a compact smartphone display backlight. IC Role / Device Role / Timing Role: Constant-current boost regulator with 2.0 MHz switching and 34V OVP. Use Value: Enables thin form factor via small 22 µH inductor and 1 µF ceramic capacitor; 34V OVP protects against single-LED open failure. | Use Scenario: Powering high-brightness LED array in automotive-grade GPS navigation units. IC Role / Device Role / Timing Role: High-efficiency white LED driver operating across wide input range (2.5–10 V) and temperature (–40°C to +125°C). Use Value: Maintains consistent brightness under varying battery voltage; thermal shutdown prevents latch-up in enclosed enclosures. |
| Digital Camera Flash | MP3 Player UI Lighting |
Use Scenario: Delivering pulsed high-current drive for camera flash LEDs requiring fast turn-on and precise current control. IC Role / Device Role / Timing Role: Fast-response boost controller with 50 µs enable turn-on time and 750 mA switch current limit. Use Value: Achieves rapid LED activation without overshoot; internal Schottky minimizes conduction loss during flash pulses. | Use Scenario: Providing uniform backlight for OLED or segment LCD in portable audio players. IC Role / Device Role / Timing Role: Low-quiescent-current (2.5 mA typical) LED driver with 0.1 µA shutdown mode. Use Value: Extends battery runtime between charges; PWM dimming via EN pin enables smooth brightness adjustment without color shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC2293-15YML-TR | Same 2.0 MHz frequency and DFN-8 package, but 15V OVP instead of 34V. | Suitable for ≤4-LED strings (≤12V nominal); not safe for 6+ LED strings where output may exceed 15V. | Select when output voltage stays below 13V; saves cost on lower-voltage capacitors and diodes. |
| TPS61061DRVR | 2.5 MHz switching, 28V OVP, 400 mA switch current, no internal Schottky (requires external diode). | Requires external Schottky diode and larger output capacitor; less compact than MIC2293-34BML-TR solution. | Choose if higher switching frequency is needed to avoid specific RF bands; accept added component count and layout complexity. |
Compared with MIC2293-15YML-TR, the MIC2293-34BML-TR provides higher OVP headroom for longer LED strings; compared with TPS61061DRVR, it delivers greater integration (internal Schottky), smaller solution size, and tighter current regulation (95 mV vs. 100 mV reference), making it optimal for space- and efficiency-critical portable LED systems.
Availability
MIC2293-34BML-TR is available at Aetrix Electronics and suitable for cell phone backlighting, GPS display illumination, digital camera flash circuits, MP3 player UI lighting, and portable medical device indicators requiring stable component supply and RoHS-compliant packaging.
Supply support for MIC2293-34BML-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
Microchip Technology is a global provider of microcontrollers, analog, FPGA, and timing solutions, with expertise in power management ICs for portable and embedded systems.
The MIC2293 product line delivers high-frequency, constant-current LED drivers with integrated protection and minimal external components-designed specifically for compact, battery-powered backlighting and flash applications.
FAQ
What is the maximum output voltage supported by the MIC2293-34BML-TR?
The MIC2293-34BML-TR features a factory-set 34V overvoltage protection (OVP) threshold. While the output can be regulated up to ~32V under normal operation, the internal OVP circuit clamps the output at 34V maximum to prevent damage during LED open-circuit faults. This is confirmed in the Electrical Characteristics table (VOVP = 30–34V for MIC2292/93-34 variants) and Functional Description section.
Does the MIC2293-34BML-TR require an external Schottky diode?
No, the MIC2293-34BML-TR integrates a Schottky diode rated for 34V reverse voltage and 150 mA forward current. The datasheet explicitly states "Internal Schottky Diode" in Features and confirms its inclusion in the Functional Block Diagram and Pin Descriptions. No external diode is required, reducing BOM count and PCB area.
What is the feedback reference voltage of the MIC2293-34BML-TR and how is LED current set?
The MIC2293-34BML-TR has a precise 95 mV ±5% feedback reference voltage (VFB). LED current is set by connecting a resistor (RFB) between the FB pin and ground: ILED = 95 mV / RFB. This relationship is derived directly from Equation 4-1 in the datasheet and validated across –40°C to +125°C.
Can the MIC2293-34BML-TR operate from a single-cell Li-ion battery?
Yes, the MIC2293-34BML-TR supports input voltages from 2.5 V to 10 V, fully covering the discharge range of a single-cell Li-ion battery (typically 3.0 V to 4.2 V). Its 2.1 V typical UVLO ensures reliable start-up even at low battery voltage, and its high 2.0 MHz switching frequency maintains efficiency across the full input range.
What package type and thermal characteristics does the MIC2293-34BML-TR use?
The MIC2293-34BML-TR uses a 2 mm × 2 mm, 8-pin DFN package with exposed thermal pad (ML suffix). Its junction-to-air thermal resistance (θJA) is 93°C/W under standard JEDEC conditions. The exposed pad (EP) must be soldered to a PCB ground plane to achieve rated power dissipation and maintain operation within the –40°C to +125°C junction temperature range.
MIC2293-34BML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VFDFN Exposed Pad, 8-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
MIC2293-34BML-TR FAQ
1.How can I place an order for MIC2293-34BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2293-34BML-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 MIC2293-34BML-TR reliable?
The price and inventory of MIC2293-34BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2293-34BML-TR is usually 5 days.
3.What payment methods are accepted for MIC2293-34BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2293-34BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2293-34BML-TR?
MIC2293-34BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2293-34BML-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 MIC2293-34BML-TR?
For technical support, including MIC2293-34BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2293-34BML-TR requirements.
6.How does Aetrix verify that MIC2293-34BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2293-34BML-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 MIC2293-34BML-TR meets industry standards.
7.What is the process for return or replacement of MIC2293-34BML-TR?
All MIC2293-34BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2293-34BML-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 MIC2293-34BML-TR part is unused and in its original packaging.
Return procedure for MIC2293-34BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2293-34BML-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…
