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Microchip Technology MIC2288BML-TR
- Part No.:
- MIC2288BML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-VFDFN Exposed Pad, 8-MLF®
- Datasheet:
-
MIC2288BML-TR.pdf
- Description:
- IC REG BOOST ADJ 1.2A 8MLF
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC2288BML-TR from Microchip Technology is a 1.2 MHz PWM boost switching regulator with integrated 34V/1A bipolar switch, adjustable output up to 34V, and stable operation with ceramic capacitors. It delivers <1% line/load regulation and <1 µA shutdown current in an 8-lead 2 mm × 2 mm DFN package, enabling compact high-voltage bias supplies for TFT-LCD and OLED displays.
For engineers reviewing the MIC2288BML-TR datasheet, MIC2288BML-TR pinout, MIC2288BML-TR application, or MIC2288BML-TR equivalent, this page provides verified technical context, validated pin functions, confirmed OVP-enabled DFN package behavior, and real-world design constraints including duty cycle limits, thermal resistance (θJA = 93°C/W), and feedback voltage tolerance (1.227–1.252 V).
Technical Context
The MIC2288BML-TR implements constant-frequency current-mode PWM control using an internal 1.2 MHz oscillator, slope-compensated ramp generator, and gm error amplifier referenced to 1.24 V. Its bipolar switch enables robust 1A peak current handling with 550 mV saturation voltage at 1A, supporting high-efficiency boost conversion across 2.5–10 V input.
This variant uses the 8-lead DFN (ML) package with dedicated OVP, AGND, PGND, and exposed pad (EP) terminals - enabling output overvoltage protection clamping at 30–34 V and optimized thermal performance (θJA = 93°C/W) for continuous operation from –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +2.5 V to +10 V - supports single-cell Li-ion (3.0–4.2 V) and 5 V rail inputs without external LDO pre-regulation. |
| Switch Current Limit | 1.2 A typical - defines maximum inductor peak current and load capability before foldback or shutdown. |
| Oscillator Frequency | 1.05–1.35 MHz - enables use of small 4.7–10 µH inductors and low-ESR ceramic output capacitors (e.g., 4.7–22 µF X5R). |
| Feedback Voltage | 1.227–1.252 V (±1%) - sets output voltage accuracy via external resistor divider; tolerance directly impacts VOUT error budget. |
| Output Overvoltage Protection | 30–34 V - active only in DFN package (MIC2288YML); prevents uncontrolled rise if FB pin opens or shorts. |
| Shutdown Current | 0.1–1 µA - ensures ultra-low quiescent drain in battery-powered standby modes. |
| Junction Temperature Range | –40°C to +125°C - validated for automotive infotainment display bias and industrial HMI applications. |
Pinout & Package
Package: 8-lead 2 mm × 2 mm thin DFN (ML) with exposed thermal pad (EP). Pin 1 = OVP, Pin 2 = VIN, Pin 3 = EN, Pin 4 = AGND, Pin 5 = NC, Pin 6 = FB, Pin 7 = SW, Pin 8 = PGND, EP = GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OVP (Pin 1) | Overvoltage protection enable | Must be tied to VOUT to activate 34 V clamp; grounding disables OVP - critical for fault-safe bias supply design. |
| VIN (Pin 2) | Main power input | Accepts 2.5–10 V; requires local 2.2 µF ceramic decoupling; feeds internal bias and switch driver circuits. |
| EN (Pin 3) | Logic-enable control | Active-high (1.5 V threshold); must not float - pull-down resistor required for reliable shutdown sequencing. |
| AGND (Pin 4) | Analog ground reference | Separate from PGND to minimize noise coupling into feedback loop; connects to FB and error amplifier ground. |
| NC (Pin 5) | No internal connection | Not bonded; must remain unconnected - no routing or thermal relief required. |
| FB (Pin 6) | Feedback voltage sense | Monitors resistive divider output; 1.24 V reference sets VOUT = 1.24 × (1 + R1/R2); R2 ≤ 5 kΩ per design rules. |
| SW (Pin 7) | Switch node | Connects to inductor and Schottky diode anode; carries high di/dt switching current - requires short, low-inductance layout. |
| PGND (Pin 8) | Power ground return | Carries pulsed switch current; must be routed separately from AGND and joined at single-point star ground near EP. |
| EP (Exposed Pad) | Thermal and electrical ground | Soldered to PCB copper pour for thermal dissipation (θJA = 93°C/W); electrically connected to PGND internally. |
Key Features
| Feature | Design Value |
|---|---|
| 1.2 MHz fixed-frequency PWM | Enables use of sub-10 µH inductors and avoids AM radio band interference; reduces EMI filtering complexity vs. variable-frequency alternatives. |
| Internal 34 V / 1 A bipolar switch | Eliminates external MOSFET and gate driver; supports direct 12–24 V outputs from 3.3/5 V inputs in space-constrained display modules. |
| Output overvoltage protection (OVP) | Hardware-clamps VOUT to ≤34 V during FB open-circuit or short faults - protects downstream OLED pixels and gate drivers from destructive overvoltage. |
| Stable with ceramic capacitors | Removes need for electrolytic or tantalum output caps; enables smaller, longer-life, lower-ESR designs compatible with automated SMT assembly. |
| <1% line and load regulation | Maintains tight output stability across input voltage shifts (e.g., Li-ion discharge) and dynamic load steps (e.g., LCD segment activation), reducing need for post-regulation LDOs. |
Applications
| TFT-LCD Bias Supply | Organic EL Power Supply |
|---|---|
|
Use Scenario: Generating positive VPOS (12–15 V) and negative VNEG (–10 V) rails for TFT source/gate drivers in automotive instrument clusters. IC Role / Device Role / Timing Role: Primary boost converter providing regulated high-voltage bias; operates continuously in constant-frequency PWM mode with 1.2 MHz switching. Use Value: Compact 2 mm × 2 mm footprint supports dense multi-rail PMIC layouts; OVP prevents pixel burn-in during feedback fault conditions. |
Use Scenario: Powering OLED display anode (VANODE = 18–24 V) from 3.3 V or 5 V system rail in portable medical monitors. IC Role / Device Role / Timing Role: High-efficiency DC/DC boost stage delivering up to 50 mA at 24 V; uses ceramic output cap for low-profile, high-reliability design. Use Value: <1 µA shutdown current extends battery life in sleep mode; ±1% feedback tolerance ensures consistent brightness across display lifetime. |
| DSL Line Card 12 V Supply | Multi-Output DC/DC Converter |
|
Use Scenario: Generating isolated 12 V bias for DSL transceiver PHYs and line drivers in broadband access equipment. IC Role / Device Role / Timing Role: Non-isolated boost regulator feeding downstream isolated flyback or charge-pump stages; operates across –40°C to +85°C ambient. Use Value: Wide 2.5–10 V input range accommodates varying intermediate bus voltages; 125°C junction rating ensures reliability under sealed chassis thermal stress. |
Use Scenario: Serving as primary boost stage in dual-output SEPIC-derived topology generating +15 V and –12 V for analog sensor signal chains. IC Role / Device Role / Timing Role: Constant-frequency current-mode controller with precise duty-cycle control (85% max) enabling predictable loop compensation. Use Value: Internal slope compensation and gm amplifier simplify external compensation network; stable with ceramic caps reduces BOM count and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | CMOS-based 2.5–12 V input, 1.2 A switch, 500 kHz–2.2 MHz programmable frequency; no integrated OVP. | Lacks hardware OVP; requires external circuitry for fault protection in display bias applications. | Preferred when higher efficiency at light loads or frequency tuning is needed; verify external OVP implementation for safety-critical bias rails. |
| MAX17222ETA+ | 1.8–5.5 V input, 0.5 A switch, 1.2 MHz fixed frequency, 1.21 V feedback reference; no OVP, smaller 2 mm × 2 mm TDFN-6. | Lower input voltage ceiling and current limit restrict use to low-power OLED segments (<20 mA at 15 V). | Valid for space-constrained, low-input-voltage applications where full 1A capability and OVP are unnecessary. |
Compared with TPS61088RHLR and MAX17222ETA+, the MIC2288BML-TR uniquely combines 34 V OVP, bipolar switch ruggedness, and –40°C to +125°C operation - making it the only option qualified for automotive TFT-LCD gate driver bias without external protection components.
Availability
MIC2288BML-TR is available at Aetrix Electronics and suitable for TFT-LCD bias supplies, organic EL display power, and DSL line card 12 V generation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC2288BML-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 global manufacturing and quality certifications including ISO 9001 and IATF 16949.
The MIC2288 product line delivers high-density, thermally robust boost converters for display bias and industrial high-voltage auxiliary rails - designed specifically for space-constrained, high-reliability applications demanding integrated protection and wide temperature operation.
FAQ
What is the maximum output voltage supported by the MIC2288BML-TR?
The MIC2288BML-TR supports adjustable output voltage up to 34 V, enabled by its internal 34 V-rated bipolar switch. This maximum is enforced by the integrated output overvoltage protection (OVP) circuit in the DFN package, which clamps VOUT to 30–34 V during feedback faults. The actual setpoint depends on external resistor divider values and is calculated as VOUT = 1.24 V × (1 + R1/R2).
Does the MIC2288BML-TR require an external Schottky diode?
Yes, the MIC2288BML-TR requires an external Schottky diode connected between the SW pin and VOUT. The datasheet specifies a 1 A, 40 V rated device (e.g., MBRM140T3) to handle peak inductor current and reverse voltage. Unlike synchronous boost controllers, MIC2288BML-TR uses an internal bipolar transistor and external diode for energy transfer - omitting the diode will prevent proper regulation and may damage the IC.
How does the OVP function work on the MIC2288BML-TR?
The OVP function on the MIC2288BML-TR is activated when the OVP pin (Pin 1) is connected to VOUT. If the feedback network fails open or shorts to ground, causing uncontrolled output rise, the OVP circuit detects >34 V and forces the internal switch off. This hardware-level protection is exclusive to the DFN package (MIC2288YML variants) and is disabled if OVP is grounded. The MIC2288BML-TR implements this feature as specified in DS20006034C, pages 4 and 11.
What is the recommended minimum load for stable operation of the MIC2288BML-TR?
The MIC2288BML-TR does not specify a minimum load, but light-load pulse-skipping may occur when input voltage approaches output voltage - especially below ~5 mA. To maintain regulation stability, Microchip recommends either increasing output capacitance (e.g., ≥10 µF X5R for 12 V output) or adding a small dummy load (e.g., 1–2 mA bleed resistor). This mitigates overshoot caused by inductor energy storage during skipped cycles, as detailed in Section 5.2 of DS20006034C.
Can the MIC2288BML-TR be used in SEPIC converter topologies?
Yes, the MIC2288BML-TR is explicitly listed for SEPIC converter applications in its official documentation (DS20006034C, page 1). Its constant-frequency current-mode architecture, 85% maximum duty cycle, and ability to regulate both positive and negative output rails make it suitable for SEPIC-derived designs. External component selection - particularly coupled inductors and output capacitor derating for AC ripple - must follow Microchip's Application Note AN1234 guidelines to ensure stability and transient response.
MIC2288BML-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:
- 1.2A (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)
MIC2288BML-TR FAQ
1.How can I place an order for MIC2288BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2288BML-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 MIC2288BML-TR reliable?
The price and inventory of MIC2288BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2288BML-TR is usually 5 days.
3.What payment methods are accepted for MIC2288BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2288BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2288BML-TR?
MIC2288BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2288BML-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 MIC2288BML-TR?
For technical support, including MIC2288BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2288BML-TR requirements.
6.How does Aetrix verify that MIC2288BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2288BML-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 MIC2288BML-TR meets industry standards.
7.What is the process for return or replacement of MIC2288BML-TR?
All MIC2288BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2288BML-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 MIC2288BML-TR part is unused and in its original packaging.
Return procedure for MIC2288BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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