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Microchip Technology MIC2202BML
- Part No.:
- MIC2202BML
- Manufacturer:
- Microchip Technology
- Package:
- 10-VFDFN Exposed Pad, 10-MLF®
- Datasheet:
-
MIC2202BML.pdf
- Description:
- IC REG BUCK ADJ 600MA 10MLF
- Quantity:
- Payment:
- Shipping:
Inventory:1,670
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Product details
Overview
MIC2202BML from Micrel Inc. is an adjustable-output, high-efficiency 2MHz synchronous buck DC-DC converter with integrated P-channel and N-channel MOSFETs, stable with only a 1µF ceramic output capacitor, delivering up to 600mA at output voltages as low as 0.5V, and operating from a 2.3V–5.5V input - widely used in space-constrained RF power amplifier supplies for CDMA/W-CDMA handsets.
For engineers reviewing the MIC2202BML datasheet, MIC2202BML pinout, MIC2202BML application, or MIC2202BML equivalent, key selection criteria include its 2MHz fixed-frequency PWM operation, internal compensation enabling ultra-fast transient response (up to 500kHz GBW), SYNC_IN/SYNC_OUT daisy-chain capability, and MLF® 10-pin 3mm × 3mm package with exposed thermal pad.
Technical Context
The MIC2202BML implements voltage-mode PWM control with a proprietary internal ramp generator and error amplifier referenced to a precise 0.5V feedback threshold. Its 2MHz oscillator is factory-trimmed (1.8–2.2MHz typ) and supports external synchronization from 1.6MHz to 2.5MHz via SYNC_IN.
It features fully integrated synchronous rectification using a high-side P-MOSFET and low-side N-MOSFET, eliminating need for external Schottky diodes. The BIAS pin supplies a regulated 2.3V internal bias rail, requiring a mandatory 10nF ceramic bypass capacitor to ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3V to 5.5V - supports single-cell Li-ion, Li-polymer, and 3.3V/5V system rails without pre-regulation. |
| Output Voltage Range | Adjustable down to 0.5V - set via external resistor divider on FB pin; enables core voltage scaling for low-power processors and RF ICs. |
| Switching Frequency | 2MHz (typ), ±10% - enables use of tiny 2.2µH inductors and 1µF ceramic capacitors, minimizing board area and EMI filter size. |
| Max Output Current | 600mA continuous - limited by internal MOSFET RDS(ON) (0.55–0.9Ω) and thermal resistance (θJA = 60°C/W for MLF). |
| Feedback Reference | 0.5V ±2.5% - high-precision reference enables tight output regulation (1% line/load regulation) across temperature and load. |
| Quiescent Current | 350–450µA active; <1µA in shutdown - extends battery life in always-on portable devices during idle states. |
| Transient Response | Up to 500kHz gain-bandwidth - delivers sub-microsecond recovery from load steps, critical for CPU and RF PA dynamic supply demands. |
Pinout & Package
The MIC2202BML is housed in a 10-pin 3mm × 3mm MLF® (MicroLeadFrame) package with exposed thermal pad (EP) connected to GND, offering superior thermal performance (θJA = 60°C/W) versus MSOP alternatives.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Switch Node | Drives external inductor; connects internally to drain of high-side P-MOSFET and source of low-side N-MOSFET. |
| 2 (VIN) | Input Supply | Primary power input (2.3–5.5V); requires ≥1µF ceramic bypass capacitor to GND for stability and noise suppression. |
| 3 (SYNC_IN) | External Sync Input | Accepts 1.6–2.5MHz CMOS clock; overrides internal oscillator to align switching frequency across multiple converters. |
| 4 (SYNC_OUT) | Sync Output | Open-collector output mirroring internal oscillator; used to daisy-chain multiple MIC2202BMLs in master-slave configuration. |
| 5 (EN) | Enable Control | Logic-level input; low = shutdown (<1µA IQ), high >0.9V = active; includes 20mV hysteresis to prevent chatter near threshold. |
| 6 (FB) | Feedback Input | Connects to resistor divider from VOUT; compares against 0.5V internal reference to regulate output voltage dynamically. |
| 7 (BIAS) | Internal Bias Supply | 2.3V regulated output for internal circuitry; must be bypassed with 0.01µF ceramic capacitor - not for external use. |
| 8, 9, 10 (GND) | Signal & Power Ground | Three dedicated GND pins plus EP (backside pad) - all must be connected to low-impedance ground plane for thermal and noise integrity. |
Key Features
| Feature | Design Value |
|---|---|
| 1µF Ceramic Output Stability | Eliminates need for large electrolytic or tantalum capacitors - reduces footprint, cost, and failure risk in portable designs. |
| SYNCLOCK Daisy-Chain Capability | Enables phase-aligned multi-rail operation without external timing ICs - simplifies layout and minimizes beat-frequency EMI in multi-converter systems. |
| Ultra-Fast Transient Response | 500kHz loop bandwidth ensures <1µs recovery from 50% load steps - maintains clean supply for sensitive RF power amplifiers during burst transmission. |
| Integrated Synchronous MOSFETs | Reduces conduction losses vs. diode-based buck; achieves >95% peak efficiency at 3.3VOUT/4.2VIN, lowering thermal stress in compact enclosures. |
| Internal Compensation | Removes need for external compensation network - accelerates design cycle and improves consistency across production units. |
Applications
| Cellular Phone RF Power Amplifier | FPGA Core Voltage Supply |
|---|---|
Use Scenario: Dynamically adjusting supply to CDMA/W-CDMA RF power amplifiers during transmit/receive cycles to optimize linearity and efficiency. IC Role / Device Role / Timing Role: Adjustable synchronous buck regulator providing fast-response, low-noise 1.2V–3.3V supply with 2MHz switching synchronized to baseband clock. Use Value: Enables envelope tracking-like efficiency gains without complex modulation circuitry; 500kHz bandwidth prevents droop during 100ns PA enable edges. | Use Scenario: Delivering tightly regulated, low-noise 1.0V–1.8V core voltage to FPGA I/O banks and logic arrays in handheld test equipment. IC Role / Device Role / Timing Role: Primary point-of-load regulator with 1% load regulation and 0.5V reference accuracy, supporting dynamic voltage scaling modes. Use Value: Maintains FPGA timing margins under rapid current transients (e.g., configuration bursts); 1µF ceramic stability avoids bulk capacitor aging issues. |
| 802.11 WLAN Baseband SoC | DSL Modem Line Driver |
Use Scenario: Powering 2.5V/1.8V rails for Wi-Fi baseband processors and analog front-end ICs in compact residential gateways. IC Role / Device Role / Timing Role: Dual-rail buck converter (using two MIC2202BMLs in SYNCLOCK mode) delivering low-ripple, EMI-controlled supplies. Use Value: 2MHz fixed-frequency operation places harmonics outside 2.4GHz ISM band; daisy-chained sync eliminates inter-rail beat frequencies. | Use Scenario: Generating 3.3V analog supply for line driver amplifiers in ADSL/VDSL modems where thermal headroom is constrained. IC Role / Device Role / Timing Role: High-efficiency, thermally robust buck regulator leveraging MLF package's 60°C/W θJA for continuous 600mA delivery in sealed enclosures. Use Value: >95% efficiency at full load reduces heatsink requirements; 10-pin MLF footprint fits dense modem PCB layouts without compromising thermal relief. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 3MHz fixed-frequency, 0.6V reference, 600mA rating, 6-pin WSON package - smaller footprint but no SYNC_IN/SYNC_OUT. | Lacks daisy-chain synchronization; unsuitable for multi-rail EMI-sensitive systems requiring phase alignment. | Select when board space is paramount and single-rail operation suffices; verify 3MHz harmonics do not interfere with 2.4GHz/5GHz bands. |
| RT8059NGSP | 2MHz, 0.6V reference, 600mA, 10-pin QFN with EN/PG - includes power-good flag but no SYNC_OUT functionality. | No master-slave chaining capability; PG signal adds monitoring value but increases BOM count if unused. | Prefer when system-level power sequencing or fault reporting is required; confirm thermal pad layout matches MIC2202BML's EP grounding scheme. |
Compared with TPS62231DRVR and RT8059NGSP, the MIC2202BML uniquely combines 2MHz operation, 0.5V reference precision, and SYNCLOCK daisy-chain support in a thermally optimized 3mm × 3mm MLF package - making it optimal for multi-rail, EMI-critical RF and communications applications where timing coherence and minimal component count are essential.
Availability
MIC2202BML is available at Aetrix Electronics and suitable for cellular phone RF power supplies, FPGA core voltage regulation, 802.11 WLAN baseband SoCs, and DSL modem line drivers requiring stable component supply across extended temperature ranges (–40°C to +125°C).
Supply support for MIC2202BML 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 power management, analog, and RF solutions before its acquisition by Microchip Technology in 2015.
The MIC2202 product line was engineered specifically for high-frequency, space-constrained portable electronics - emphasizing minimal external components, fast transient response, and synchronization capability for multi-rail noise-sensitive applications.
FAQ
What is the minimum output capacitor value supported by the MIC2202BML?
The MIC2202BML is designed to be stable with a minimum 1µF ceramic output capacitor (X5R or X7R dielectric). Using Y5V or Z5U capacitors is prohibited due to their high capacitance drift and resistive behavior at high frequencies, which causes instability. Total output capacitance must not exceed 15µF to avoid current-limit triggering during startup.
Does the MIC2202BML require an external compensation network?
No, the MIC2202BML features internal compensation optimized for use with a 2.2µH inductor and 1µF ceramic output capacitor. This eliminates external compensation components, reduces design complexity, and ensures consistent loop stability across manufacturing lots and temperature ranges without tuning.
How does the SYNCLOCK feature work on the MIC2202BML?
The MIC2202BML's SYNCLOCK feature uses the open-collector SYNC_OUT pin to drive the SYNC_IN pin of another MIC2202BML, creating a master-slave daisy-chain. This forces all linked regulators to operate at the same fundamental frequency and phase, eliminating beat frequencies and simplifying EMI filtering in multi-rail systems such as WLAN or cellular baseband boards.
What is the function of the BIAS pin on the MIC2202BML?
The BIAS pin provides a dedicated 2.3V internal bias supply for the MIC2202BML's control circuitry. It must be bypassed with a 0.01µF ceramic capacitor to ground. The BIAS pin is not intended for external loads - drawing current from it degrades regulation accuracy and may cause instability or thermal overstress.
Can the MIC2202BML operate with input voltages below 2.3V?
No, the MIC2202BML has a specified minimum input voltage of 2.3V per its Absolute Maximum Ratings and Operating Ratings. Operation below this threshold is not guaranteed and may result in improper regulation, dropout, or failure to start. For sub-2.3V inputs, consider alternative regulators such as the MIC2295 or similar ultra-low-VIN buck converters.
MIC2202BML Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad, 10-MLF®
- Packaging:
- Tray
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 600mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MLF® (3x3)
MIC2202BML FAQ
1.How can I place an order for MIC2202BML through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2202BML 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 MIC2202BML reliable?
The price and inventory of MIC2202BML are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2202BML is usually 5 days.
3.What payment methods are accepted for MIC2202BML?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2202BML transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2202BML?
MIC2202BML orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2202BML 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 MIC2202BML?
For technical support, including MIC2202BML datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2202BML requirements.
6.How does Aetrix verify that MIC2202BML is sourced from the original manufacturer or authorized distributors?
All MIC2202BML 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 MIC2202BML meets industry standards.
7.What is the process for return or replacement of MIC2202BML?
All MIC2202BML units undergo pre-shipment inspection (PSI). If there is an issue with MIC2202BML, 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 MIC2202BML part is unused and in its original packaging.
Return procedure for MIC2202BML:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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