My Inquiry
My Account
Microchip Technology MIC2203BML-TR
- Part No.:
- MIC2203BML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 10-VFDFN Exposed Pad, 10-MLF®
- Datasheet:
-
MIC2203BML-TR.pdf
- Description:
- IC REG BUCK ADJ 300MA 10MLF
- Quantity:
- Payment:
- Shipping:
Inventory:2,896
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC2203BML-TR from Micrel is a high-efficiency, 1MHz synchronous buck regulator delivering up to 300mA output current with adjustable output down to 0.5V, operating from 2.3V–5.5V input. It features <1mA no-load supply current, <350µA quiescent current, and thermal/current protection - optimized for RF and audio power rails in portable wireless devices.
For engineers reviewing the MIC2203BML-TR datasheet, MIC2203BML-TR pinout, MIC2203BML-TR application, or MIC2203BML-TR equivalent, key selection criteria include its 1MHz constant-frequency PWM operation, SYNC_IN/SYNC_OUT daisy-chain capability, MLF-10L package thermal performance (θJA = 60°C/W), and internal P/N-channel MOSFET integration eliminating external diode requirements.
Technical Context
The MIC2203BML-TR implements voltage-mode PWM control with an internal 1MHz ramp generator and 0.5V reference error amplifier. Its high loop bandwidth enables ultra-fast transient response-critical for CPU core and RF circuitry powering in cellular handsets and PDAs.
It integrates a high-side P-channel and low-side N-channel MOSFET switch, supports external synchronization from 800kHz to 1.25MHz, and includes a dedicated BIAS pin (2.3V nominal) requiring 10nF ceramic decoupling. Shutdown current is <1µA, and feedback uses a resistor divider referenced to the internal 0.5V bandgap.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1MHz fixed (±20% sync range); enables predictable EMI filtering and avoids sensitive IF bands. |
| Input Voltage Range | 2.3V to 5.5V; compatible with single Li-ion, Li-poly, or 3.3V/5V system rails. |
| Output Current | 300mA continuous; sufficient for baseband processors, WLAN transceivers, and audio codecs. |
| Feedback Reference | 0.5V ±2.5%; sets output via resistor divider (e.g., 3.83kΩ/10kΩ → 1.8V). |
| Quiescent Current | <350µA; minimizes battery drain in standby mode of portable devices. |
| Thermal Resistance θJA | 60°C/W (MLF-10L); enables higher power density vs. MSOP-10L (115°C/W). |
| Shutdown Current | <1µA; supports deep-sleep states without external load switches. |
Pinout & Package
The MIC2203BML-TR is housed in a 3mm × 3mm, 10-pin MicroLead Frame (MLF™-10L) package with exposed thermal pad (EP) connected to GND. This thermally enhanced QFN-style package delivers superior power dissipation for space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Switch Node Output | Drives external inductor; connects to internal P/N-MOSFET junction - requires low-inductance layout and ceramic capacitor placement. |
| 2 (VIN) | Main Power Input | Supplies both power stage and internal bias; requires ≥1µF X5R/X7R ceramic bypass to GND. |
| 3 (SYNC_IN) | External Clock Input | Accepts 800kHz–1.25MHz TTL-compatible clock; tie to GND if unused to prevent noise coupling. |
| 4 (SYNC_OUT) | Synchronization Pulse Output | Open-drain 50ns pulse at oscillator frequency; enables master-slave daisy-chaining with 10kΩ pull-up. |
| 5 (EN) | Enable Control | Active-high logic input (0.7V threshold); places device in tri-state shutdown with <1µA current draw. |
| 6 (FB) | Feedback Input | Connects to resistor divider; compares against 0.5V internal reference to regulate output voltage. |
| 7 (BIAS) | Internal Bias Supply | Nominally 2.3V; must be decoupled with 10nF ceramic - not for external loading. |
| 8,9,10 (GND) | Signal & Power Ground | Common return for VIN, SW, FB, EN, SYNC pins; EP pad must be soldered to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| All-ceramic capacitor support | Enables compact, low-ESR input (1µF), output (2.2µF), and bias (10nF) filtering - eliminates electrolytics and improves reliability. |
| SYNCLOCK daisy-chain capability | Allows multiple MIC2203BML-TR units to synchronize via SYNC_OUT→SYNC_IN, eliminating beat frequencies in multi-rail systems. |
| Ultra-fast transient response | High loop bandwidth reduces required output capacitance and maintains regulation during sudden load steps (e.g., RF transmit bursts). |
| Integrated P/N MOSFETs | Eliminates need for external freewheeling diode - simplifies layout, improves efficiency, and reduces BOM count. |
| Thermal shutdown & current limit | Protects against overload and ambient overheating; auto-recovery on cooldown ensures robust field operation. |
Applications
| 802.11 WLAN Modules | MP3/MD Players |
|---|---|
Use Scenario: Powering 2.5V or 3.3V WLAN baseband ICs and RF front-end during burst transmission. IC Role / Device Role / Timing Role: Primary DC-DC converter regulating clean, low-noise supply for sensitive RF sections. Use Value: 1MHz fixed-frequency operation avoids interference with 2.4GHz ISM band harmonics; <350µA quiescent current extends battery life in idle mode. |
Use Scenario: Generating 1.8V core voltage for DSP and 3.3V I/O for flash memory and audio DAC in portable audio players. IC Role / Device Role / Timing Role: Adjustable-output buck regulator supporting multiple voltage domains from single Li-ion cell. Use Value: 0.5V feedback reference enables precise low-voltage outputs; MLF-10L package saves board area in slim form factors. |
| High-Performance Cellular Handsets | PDA Power Management |
Use Scenario: Supplying dynamic CPU core voltage that scales with processing load in dual-mode GSM/EDGE phones. IC Role / Device Role / Timing Role: Fast-transient buck regulator responding to CPU DVFS events within microseconds. Use Value: High loop bandwidth and 300mA capability maintain regulation during rapid load steps (0→300mA in <1µs), reducing output capacitor size. |
Use Scenario: Delivering stable 1.2V–1.5V for ARM processor cores and 3.3V for touchscreen controllers in handheld PDAs. IC Role / Device Role / Timing Role: Synchronized multi-rail power source enabling coordinated power sequencing and noise isolation. Use Value: SYNC_IN/SYNC_OUT allows timing alignment across multiple MIC2203BML-TR regulators - critical for EMI compliance in dense layouts. |
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 switching frequency, 400mA output, 2.05V–6.5V input; smaller 2mm × 2mm WSON-6 package. | Better suited for ultra-compact, high-frequency designs where size and ripple matter more than RF noise floor. | Choose TPS62231DRVR when board space is constrained and higher-frequency operation is acceptable for EMI filtering. |
| RT8059ZSP | 1.5MHz switching, 500mA output, 2.5V–5.5V input; integrated soft-start and power-good signal. | Includes PG output and programmable soft-start - beneficial for sequenced power systems lacking external supervision. | Choose RT8059ZSP when system-level power sequencing or fault reporting is required beyond basic regulation. |
Compared with TPS62231DRVR and RT8059ZSP, the MIC2203BML-TR offers lower quiescent current (<350µA), superior RF-noise immunity due to 1MHz fixed-frequency PWM (vs. higher-frequency alternatives), and proven thermal performance in MLF-10L - making it preferred for battery-sensitive, noise-critical portable RF applications.
Availability
MIC2203BML-TR is available at Aetrix Electronics and suitable for 802.11 WLAN modules, MP3/MD players, and high-performance cellular handsets requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MIC2203BML-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
Micrel (acquired by Microchip in 2015) was a U.S.-based analog and power management IC designer focused on high-efficiency, low-noise solutions for portable and communications markets.
The MIC2203 product line targets noise-sensitive, battery-powered RF and audio subsystems - emphasizing low quiescent current, fast transient response, and synchronization capability for multi-rail EMI control.
FAQ
What is the minimum output voltage supported by the MIC2203BML-TR?
The MIC2203BML-TR supports adjustable output voltages down to 0.5V, set via an external resistor divider connected to the FB pin referencing the internal 0.5V precision bandgap. For example, using R1 = 10kΩ and R2 = 3.83kΩ yields a 1.8V output. The 0.5V reference enables stable low-voltage regulation essential for modern low-power DSPs and RF ICs.
Does the MIC2203BML-TR require an external Schottky diode?
No, the MIC2203BML-TR does not require an external Schottky diode because it integrates both high-side P-channel and low-side N-channel MOSFETs in a synchronous buck topology. The low-side N-MOSFET provides efficient freewheeling conduction during the off-cycle, eliminating conduction losses and thermal overhead associated with discrete diodes - a key advantage over asynchronous regulators.
How does the SYNCLOCK feature work on the MIC2203BML-TR?
The MIC2203BML-TR's SYNCLOCK feature uses the open-drain SYNC_OUT pin (50ns pulse at oscillator frequency) to drive the SYNC_IN pin of another MIC2203BML-TR unit. This creates a master-slave daisy-chain configuration where all devices lock to the same switching frequency - preventing beat frequencies and simplifying EMI filter design in multi-rail systems such as WLAN + Bluetooth combo modules.
What is the thermal performance difference between the MLF-10L and MSOP-10L packages for the MIC2203BML-TR?
The MIC2203BML-TR in MLF-10L package has a junction-to-ambient thermal resistance (θJA) of 60°C/W, significantly lower than the 115°C/W of the MSOP-10L variant. This 48% improvement enables higher continuous output current in thermally constrained layouts - especially important in sealed portable enclosures where airflow is limited and ambient temperature may exceed 60°C.
Can the MIC2203BML-TR operate with only ceramic capacitors?
Yes, the MIC2203BML-TR is specifically designed for all-ceramic capacitor operation: a minimum 1µF X5R/X7R ceramic at VIN, 2.2µF X5R ceramic at VOUT, and 10nF ceramic at BIAS. Its internally compensated voltage-mode architecture remains stable with these low-ESR components - avoiding the size, aging, and reliability drawbacks of tantalum or aluminum electrolytics commonly required by older buck controllers.
MIC2203BML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad, 10-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 300mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MLF® (3x3)
MIC2203BML-TR FAQ
1.How can I place an order for MIC2203BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2203BML-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 MIC2203BML-TR reliable?
The price and inventory of MIC2203BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2203BML-TR is usually 5 days.
3.What payment methods are accepted for MIC2203BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2203BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2203BML-TR?
MIC2203BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2203BML-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 MIC2203BML-TR?
For technical support, including MIC2203BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2203BML-TR requirements.
6.How does Aetrix verify that MIC2203BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2203BML-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 MIC2203BML-TR meets industry standards.
7.What is the process for return or replacement of MIC2203BML-TR?
All MIC2203BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2203BML-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 MIC2203BML-TR part is unused and in its original packaging.
Return procedure for MIC2203BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2203BML-TR Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
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…
