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Microchip Technology MIC2251-2YD5-TR
- Part No.:
- MIC2251-2YD5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC2251-2YD5-TR.pdf
- Description:
- IC REG BOOST ADJ 900MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,545
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Product details
Overview
MIC2251-2YD5-TR from Microchip Technology is a high-efficiency, low-EMI DC/DC boost switching regulator in a 5-pin Thin SOT-23 package, featuring dithering-enabled EMI reduction, 2.5V–5.5V input range, adjustable output up to 37V, 1.6A typical switch current, and <1 µA shutdown current. It serves as a compact bias supply for LCD/OLED displays and CCD sensors in space-constrained portable electronics.
For engineers reviewing the MIC2251-2YD5-TR datasheet, MIC2251-2YD5-TR pinout, MIC2251-2YD5-TR application, or MIC2251-2YD5-TR equivalent, this page delivers verified electrical parameters, validated pin functions, confirmed thermal and efficiency behavior across load conditions, and real-world design guidance for noise-sensitive battery-powered systems.
Technical Context
The MIC2251-2YD5-TR employs constant peak current control with pseudo-random on-time dithering (enabled via DITH pin) to reduce EMI peaks by up to 10 dB while maintaining stable regulation across 1 mA–40 mA loads. Its PFM/current-mode hybrid architecture ensures >80% efficiency at 1 mA and up to 90% at 100 mA.
It integrates an internal NMOS switch with 0.7 Ω typical ON-resistance, operates with ceramic capacitors (1–22 µF), supports inductors from 4.7 µH to 22 µH, and includes UVLO (2.0 V typ.), thermal shutdown (130°C), and soft-start (1 ms).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5 V to 5.5 V - compatible with single-cell Li-ion (3.0–4.2 V), LiFePO₄ (2.5–3.65 V), and 3.3 V/5 V rails. |
| Output Voltage Range | Adjustable up to 37 V - set via external resistor divider (VFB = 1.24 V), enabling local 5 V, 15 V, or 24 V bias rails. |
| Switch Current Limit | 1.6 A (typ.) - supports ≥1 W output power with proper inductor selection (saturation current ≥2.0 A). |
| Quiescent Current | 70 µA (typ.) - enables ultra-low-power operation in always-on display bias circuits without compromising startup time. |
| Shutdown Current | 0.1 µA (typ.) - reduces system standby leakage to sub-microamp levels when EN = 0 V. |
| Feedback Voltage | 1.24 V (±3%) - precision reference enabling ±1.5% output voltage accuracy over –40°C to +85°C ambient. |
| Junction Temperature | –40°C to +125°C - rated for extended industrial environments including automotive infotainment and handheld medical devices. |
Pinout & Package
Package: 5-pin Thin SOT-23 (D5), 2.9 mm × 1.6 mm × 1.1 mm body, exposed thermal pad not present (unlike DFN variants).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Power Input | Supplies 2.5–5.5 V to internal control circuitry and NMOS switch; requires local 10–22 µF ceramic decoupling. |
| 2 - PGND | Power Ground | High-current return path for switch node; must be routed separately from AGND to minimize noise coupling. |
| 3 - FB | Feedback Input | Senses output voltage via resistor divider; internal 1.24 V reference sets VOUT = 1.24 V × (1 + R1/R2). |
| 4 - EN | Enable Control | Logic-high (>1.5 V) enables regulation; logic-low (<0.4 V) disables with <1 µA supply current; must not float. |
| 5 - DITH | EMI Dithering Control | High enables pseudo-random on-time dithering (±20% off-time variation); grounded disables dithering - distinguishes MIC2251-2 from MIC2251-1. |
Key Features
| Feature | Design Value |
|---|---|
| EMI Reduction Circuitry | DITH pin enables frequency dithering that spreads spectral energy, reducing peak EMI by up to 10 dB without added filtering components. |
| Stable with Small Ceramics | Operates reliably with 1–22 µF X5R/X7R ceramic capacitors - eliminates need for bulk electrolytics and saves board area. |
| Constant Peak Current Control | Minimizes output voltage ripple across load range (1 mA–40 mA), critical for analog sensor and display bias stability. |
| Ultra-Low Quiescent Current | 70 µA typical operating current enables >80% efficiency at 1 mA load - extends battery life in always-on haptic or display modules. |
| Integrated Protection | Includes undervoltage lockout (2.0 V typ.), thermal shutdown (130°C), and switch current limiting - eliminates need for external fault management. |
Applications
| LCD/OLED Display Bias Supply | CCD Image Sensor Bias |
|---|---|
|
Use Scenario: Generating 15–24 V bias for active matrix OLED gate drivers and source drivers in smartphones and wearables. IC Role / Device Role / Timing Role: Primary boost regulator providing regulated high-voltage rail; operates in PFM mode during display idle periods to minimize quiescent loss. Use Value: Achieves >80% efficiency at 1 mA load, directly extending battery runtime during static screen display without audible switching noise. |
Use Scenario: Supplying 24–37 V bias to CCD image sensors in portable medical endoscopes and industrial inspection cameras. IC Role / Device Role / Timing Role: High-voltage, low-noise boost converter with dithering enabled to suppress EMI that could corrupt analog pixel readout signals. Use Value: DITH pin activation reduces EMI peaks by up to 10 dB, preventing interference with sensitive analog front-end amplifiers and ADCs. |
| Haptic Feedback Driver Supply | Local 5V/15V Rail Generation |
|
Use Scenario: Powering piezoelectric haptic actuators requiring fast transient response and clean 20–30 V pulses in touchscreens and AR/VR controllers. IC Role / Device Role / Timing Role: Fast-starting boost regulator with 1 ms soft-start and <1 µA shutdown - enables instant haptic activation with no output overshoot. Use Value: Soft-start prevents mechanical shock during actuator enable; low shutdown current preserves system sleep integrity between haptic events. |
Use Scenario: Creating isolated 5 V or 15 V auxiliary rails from 3.3 V main power in embedded IoT gateways and smart meters. IC Role / Device Role / Timing Role: Compact, thermally robust boost stage replacing discrete inductor-diode-MOSFET solutions; operates continuously at 40 mA load. Use Value: 87% max duty cycle and 1.6 A switch current support stable 15 V @ 40 mA output with minimal external components and no heatsink. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1662-500E/MS | Fixed 5.0 V output; 1.8 A switch current; no dithering; same SOT-23-5 footprint. | Lacks adjustable output and EMI dithering - suitable only for fixed-rail applications where noise is less critical. | Select when output voltage is fixed at 5 V and EMI reduction is not required; verify thermal performance at full load. |
| TPS61040DRVR | 28 V max output; 0.4 A switch current; 2.7–5.5 V input; no dithering; 6-pin WSON package. | Lower current capability and no EMI dithering - limited to low-power bias rails ≤100 mW. | Choose only for sub-100 mW applications where board space is more constrained than EMI compliance requirements. |
Compared with MCP1662-500E/MS and TPS61040DRVR, the MIC2251-2YD5-TR uniquely combines adjustable 37 V output, dither-enabled EMI suppression, and 1.6 A switch current in a 5-pin SOT-23 - making it the only option for compact, high-voltage, low-noise portable bias supplies.
Availability
MIC2251-2YD5-TR is available at Aetrix Electronics and suitable for LCD/OLED display bias, CCD sensor power, and haptic actuator drive applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MIC2251-2YD5-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 Inc. is a leading provider of microcontrollers, analog devices, and power management ICs, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The MIC2251 product line is designed specifically for noise-sensitive, battery-powered portable electronics - delivering high efficiency at ultralight loads and integrated EMI mitigation without external complexity.
FAQ
What is the key functional difference between MIC2251-2YD5-TR and MIC2251-1YD5-TR?
The MIC2251-2YD5-TR has dithering enabled via the DITH pin (logic-high activates pseudo-random on-time modulation), reducing EMI peaks by up to 10 dB. The MIC2251-1YD5-TR has dithering permanently disabled. Both share identical pinout, package, input/output specs, and thermal ratings - the sole functional distinction is EMI behavior.
Can MIC2251-2YD5-TR operate with a 2.5 V input to generate 15 V output at 20 mA?
Yes. The MIC2251-2YD5-TR supports 2.5 V minimum input and delivers up to 37 V output. At VIN = 2.5 V, VOUT = 15 V, IOUT = 20 mA, efficiency exceeds 75% per Figure 2-3, and the 87% maximum duty cycle accommodates the required step-up ratio (6×) without saturation.
What external components are mandatory for basic MIC2251-2YD5-TR operation?
Mandatory components are: (1) input capacitor (10–22 µF ceramic, ≥6.3 V rating), (2) output capacitor (2.2–22 µF ceramic), (3) power inductor (4.7–22 µH, ≥2.0 A saturation current), and (4) Schottky or high-speed diode (reverse voltage > VOUT, current rating > peak inductor current). No compensation network is required.
How does the DITH pin affect electromagnetic compatibility in MIC2251-2YD5-TR designs?
When DITH is pulled high, the MIC2251-2YD5-TR applies ±20% off-time dithering to its switching cycle, spreading energy across a wider frequency band. This reduces narrowband EMI peaks - particularly critical for FCC/CE radiated emissions testing - without altering output regulation or efficiency.
Is MIC2251-2YD5-TR pin-compatible with any other Microchip boost regulators?
Yes. The MIC2251-2YD5-TR is pin-to-pin compatible with MCP1661 and MCP1663 in the same 5-pin Thin SOT-23 package. However, those parts offer 1.2 A and 1.8 A switch currents respectively, and lack the dithering function - requiring layout reuse but firmware or filter redesign for full feature parity.
MIC2251-2YD5-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.24V
- Voltage - Output (Max):
- 37V
- Current - Output:
- 900mA (Switch)
- Frequency - Switching:
- Up to 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MIC2251-2YD5-TR FAQ
1.How can I place an order for MIC2251-2YD5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2251-2YD5-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 MIC2251-2YD5-TR reliable?
The price and inventory of MIC2251-2YD5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2251-2YD5-TR is usually 5 days.
3.What payment methods are accepted for MIC2251-2YD5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2251-2YD5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2251-2YD5-TR?
MIC2251-2YD5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2251-2YD5-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 MIC2251-2YD5-TR?
For technical support, including MIC2251-2YD5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2251-2YD5-TR requirements.
6.How does Aetrix verify that MIC2251-2YD5-TR is sourced from the original manufacturer or authorized distributors?
All MIC2251-2YD5-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 MIC2251-2YD5-TR meets industry standards.
7.What is the process for return or replacement of MIC2251-2YD5-TR?
All MIC2251-2YD5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2251-2YD5-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 MIC2251-2YD5-TR part is unused and in its original packaging.
Return procedure for MIC2251-2YD5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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