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Microchip Technology MIC2290BML-TR
- Part No.:
- MIC2290BML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-VFDFN Exposed Pad, 8-MLF®
- Datasheet:
-
MIC2290BML-TR.pdf
- Description:
- IC REG BOOST ADJ 750MA 8MLF
- Quantity:
- Payment:
- Shipping:
Inventory:1,952
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Product details
Overview
MIC2290BML-TR from Microchip Technology is a 1.2 MHz constant-frequency PWM boost switching regulator with integrated 34 V/0.75 A bipolar switch and internal Schottky diode, operating from 2.5 V to 10 V input and delivering adjustable output up to 34 V. It targets space-constrained bias supplies in display and imaging systems, including TFT LCD and organic EL panels.
For engineers reviewing the MIC2290BML-TR datasheet, MIC2290BML-TR pinout, MIC2290BML-TR application, or MIC2290BML-TR equivalent, key selection criteria include its 2 mm × 2 mm DFN-8 package, 1.24 V feedback reference, <1% line/load regulation, undervoltage lockout (2.1 V typ), and overvoltage protection (32 V typ).
Technical Context
The MIC2290BML-TR implements current-mode PWM control using a 1.2 MHz oscillator, slope-compensated ramp generator, gm error amplifier, and bipolar output transistor. Its internal 0.75 A switch and integrated Schottky diode eliminate external components while enabling high power density in ultra-small footprint applications.
It features dual ground paths (AGND and PGND), an internal 34 V output overvoltage clamp, and protection functions including undervoltage lockout (VUVLO = 2.1 V typ), thermal shutdown at 150 °C, and output overvoltage protection triggered at 32 V nominal - all critical for reliable operation in battery-powered and industrial bias rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 10 V - supports direct operation from 1–2-cell Li-ion, 3–4-cell alkaline/NiMH, and fixed 3.3 V/5 V rails. |
| Switch Current Limit | 0.75 A - enables up to ~110 mA output at 12 V (with typical efficiency), sufficient for panel bias loads. |
| Feedback Reference Voltage | 1.24 V ±1% - sets precise output voltage via external resistor divider; allows adjustment from ~1.3 V to 34 V. |
| Switching Frequency | 1.2 MHz (1.05–1.35 MHz) - reduces size of external inductor (e.g., 10 µH) and output capacitor (e.g., 10 µF ceramic). |
| Line & Load Regulation | <1% - ensures stable output under varying input (3–5 V) and load (5–20 mA) conditions without post-regulation. |
| Shutdown Current | <1 µA - preserves battery life in always-on display subsystems during sleep mode. |
| Junction Temperature Range | –40 °C to +125 °C - qualified for automotive infotainment displays and industrial HMI panels. |
Pinout & Package
The MIC2290BML-TR is housed in a 2 mm × 2 mm, 8-pin DFN (ML) leadless package with exposed thermal pad (EP/GND). The package is RoHS-compliant and rated for –40 °C to +125 °C junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Output node | Regulated output voltage; includes internal 34 V overvoltage clamp; connects to FB divider top resistor. |
| 2 VIN | Power input | 2.5–10 V supply input; requires local 1 µF ceramic decoupling close to pin. |
| 3 EN | Enable control | Logic-high (>1.5 V) enables regulation; logic-low (<0.4 V) disables with <1 µA quiescent draw. |
| 4 AGND | Analog ground | Reference ground for FB, EN, and internal error amplifier; must be routed separately from PGND. |
| 5 NC | No connect | No internal die connection; leave unconnected or float; not to be tied to GND or other signals. |
| 6 FB | Feedback input | Senses output via resistor divider; 1.24 V reference; input current ≤ ±450 nA minimizes divider error. |
| 7 SW | Switch collector | Bipolar transistor collector node; connects to inductor; carries high di/dt switching current. |
| 8 PGND | Power ground | Return path for switch current and Schottky diode; must be low-inductance connection to EP pad. |
| EP | Thermal pad | Exposed copper pad (GND); essential for thermal dissipation and EMI reduction; must be soldered to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Schottky diode | Eliminates external diode, reducing BOM count and board area - critical for compact display bias designs. |
| Ceramic-capacitor stability | Stable with X5R/X7R ceramics only - avoids costly tantalum or electrolytic capacitors and improves reliability. |
| Internal 34 V OVP clamp | Prevents destructive overvoltage during FB resistor open-circuit or short - protects downstream OLED/TFT drivers. |
| Separate AGND and PGND | Minimizes noise coupling between analog reference and high-current switching paths - improves regulation accuracy. |
| 1.2 MHz fixed-frequency PWM | Enables use of small 10 µH inductors and 10 µF output caps - reduces solution size by >40% vs. lower-frequency boost ICs. |
Applications
| Organic EL Power Supply | TFT LCD Bias Supply |
|---|---|
Use Scenario: Driving cathode/anode bias rails in portable OLED displays powered by single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Boost regulator generating stable 12–20 V bias from varying battery voltage. Use Value: Internal Schottky and 1.2 MHz operation enable compact, low-ripple bias with <1 µA shutdown current for display sleep modes. | Use Scenario: Providing VON/VOFF gate drive voltages in automotive-grade TFT instrument clusters. IC Role / Device Role / Timing Role: High-accuracy boost converter delivering 15 V @ 45 mA with <1% regulation across temperature. Use Value: 1.24 V reference and <1% line/load regulation ensure consistent contrast and grayscale fidelity over battery voltage sag and ambient temperature shifts. |
| CCD Bias Supply | 12 V DSL Power Supply |
Use Scenario: Generating 24 V bias for CCD image sensors in industrial inspection cameras with wide input range (3.3–5 V). IC Role / Device Role / Timing Role: Adjustable-output boost IC delivering 24 V @ 40 mA with overvoltage protection. Use Value: 34 V OVP threshold and thermal shutdown protect sensitive CCD arrays from latch-up or damage during transient faults. | Use Scenario: Replacing linear regulators in legacy DSL modem power trees to improve efficiency and reduce heat in enclosed enclosures. IC Role / Device Role / Timing Role: Efficient 5 V-to-12 V boost stage powering PHY and line-driver ICs. Use Value: 85%+ efficiency at 160 mA (per Figure 2-1) cuts thermal load vs. 40% efficient linear solutions, extending product lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 5-A switch current, wider 2.7–12-V input, but larger 3 mm × 3 mm QFN-16 package and no internal Schottky. | Targets higher-power applications (e.g., USB PD sink), not ultra-compact bias rails. | Choose TPS61088RHLR when >200 mA output current or >12 V output is required; avoid if board space or component count is constrained. |
| MAX17222ELT+ | Lower 0.5-A switch, 1.2-MHz operation, internal Schottky, but only 5.5-V max output and no OVP clamp. | Suited for low-voltage logic bias (e.g., 3.3 V → 5 V), not high-voltage display rails. | Choose MAX17222ELT+ for sub-6 V outputs where minimal footprint is primary; avoid for >12 V or fault-protected bias supplies. |
Compared with TPS61088RHLR and MAX17222ELT+, the MIC2290BML-TR uniquely balances 0.75-A capability, 34-V OVP, internal Schottky, and 2 mm × 2 mm footprint - making it optimal for space-limited, medium-voltage display bias where reliability and BOM simplicity are prioritized over raw current headroom.
Availability
MIC2290BML-TR is available at Aetrix Electronics and suitable for TFT LCD bias supplies, organic EL power rails, CCD sensor bias circuits, and DSL modem auxiliary power requiring stable component supply across automotive, industrial, and medical display programs.
Supply support for MIC2290BML-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with ISO/TS 16949-certified manufacturing.
The MIC2290 product line delivers high-frequency, integrated boost regulators for compact, high-reliability bias supplies in displays, imaging, and telecom infrastructure - emphasizing small footprint, internal integration, and robust protection.
FAQ
What is the maximum output voltage achievable with the MIC2290BML-TR?
The MIC2290BML-TR supports adjustable output voltage up to 34 V, set by the external feedback resistor divider. Its internal 34 V overvoltage protection clamp activates if the FB pin is disconnected or shorted, limiting output to prevent damage to the IC or downstream circuitry. This makes MIC2290BML-TR suitable for high-voltage display bias rails such as OLED anode supplies and CCD sensor bias.
Does the MIC2290BML-TR require an external Schottky diode?
No, the MIC2290BML-TR integrates a Schottky diode internally, eliminating the need for an external diode and reducing total solution size and BOM count. The datasheet specifies a typical forward drop of 0.8 V at 150 mA and leakage <4 µA at 30 V reverse bias. This integration is confirmed in both the Features list and Functional Block Diagram of the MIC2290BML-TR datasheet.
What is the recommended inductor value for the MIC2290BML-TR?
The MIC2290BML-TR datasheet recommends a 10 µH inductor for most applications, balancing efficiency, stability, size, and cost. Application circuits on pages 14–15 (e.g., Figure 6-3 and 6-4) consistently use 10 µH with 450 mA saturation current. Larger values reduce ripple but increase DCR losses and may require larger output capacitance to maintain loop stability due to right-half-plane zero effects.
How does the MIC2290BML-TR handle thermal overload?
The MIC2290BML-TR incorporates overtemperature protection that shuts down the device when junction temperature exceeds 150 °C, with 10 °C hysteresis. Once cooled below 140 °C, it automatically resumes operation. This behavior is specified in the Electrical Characteristics table (page 4) and ensures safe operation under sustained high-load or poor PCB thermal conditions without requiring external thermal monitoring.
Can the MIC2290BML-TR operate from a 3.3 V input to generate 5 V output?
Yes, the MIC2290BML-TR supports 3.3 V input and can generate 5 V output - Figure 6-1 in the datasheet shows exactly this configuration (3.3 VIN → 5 VOUT @ 180 mA) using a 4.7 µH inductor and standard ceramic capacitors. With its 2.5–10 V input range and 85% maximum duty cycle, the MIC2290BML-TR efficiently handles this common low-voltage boost requirement without external compensation.
MIC2290BML-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
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 10V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- 34V (Switch)
- Current - Output:
- 750mA (Switch)
- Frequency - Switching:
- 1.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MLF® (2x2)
MIC2290BML-TR FAQ
1.How can I place an order for MIC2290BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2290BML-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 MIC2290BML-TR reliable?
The price and inventory of MIC2290BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2290BML-TR is usually 5 days.
3.What payment methods are accepted for MIC2290BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2290BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2290BML-TR?
MIC2290BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2290BML-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 MIC2290BML-TR?
For technical support, including MIC2290BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2290BML-TR requirements.
6.How does Aetrix verify that MIC2290BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2290BML-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 MIC2290BML-TR meets industry standards.
7.What is the process for return or replacement of MIC2290BML-TR?
All MIC2290BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2290BML-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 MIC2290BML-TR part is unused and in its original packaging.
Return procedure for MIC2290BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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