My Inquiry
My Account
Microchip Technology MIC2203BMM
- Part No.:
- MIC2203BMM
- Manufacturer:
- Microchip Technology
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC2203BMM.pdf
- Description:
- IC REG BUCK ADJ 300MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,596
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC2203BMM from Micrel is a high-efficiency, 1MHz synchronous buck regulator IC designed for low-noise power conversion in RF and audio subsystems. It operates from 2.3V to 5.5V input, delivers up to 300mA output current, regulates down to 0.5V via external resistor divider, and features <1mA quiescent supply current - making it ideal for battery-powered portable devices such as WLAN modules and MP3 players.
For engineers reviewing the MIC2203BMM datasheet, MIC2203BMM pinout, MIC2203BMM application, or MIC2203BMM equivalent, key selection criteria include its constant-frequency PWM operation, SYNC_IN/SYNC_OUT daisy-chain capability, ultra-fast transient response enabled by high loop bandwidth, and MSOP-10L package compatibility with all-ceramic external components.
Technical Context
The MIC2203BMM implements voltage-mode PWM control with an internal 1MHz ramp generator and error amplifier referenced to a precise 0.5V feedback threshold. Its architecture integrates a high-side P-channel and low-side N-channel synchronous MOSFET pair, eliminating external diode requirements and enabling >95% peak efficiency at light-to-moderate loads.
It supports external synchronization from 0.8MHz to 1.25MHz via SYNC_IN and provides a 50ns SYNC_OUT pulse for master-slave cascading. Thermal shutdown, current limiting, and <1µA shutdown current ensure robust operation across –40°C to +125°C junction temperature range in portable and thermally constrained environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3V to 5.5V - supports single-cell Li-ion, Li-polymer, and regulated 3.3V/5V rails without pre-regulation. |
| Output Current | 300mA continuous - sufficient for powering RF transceivers, audio codecs, or microcontroller cores in compact handhelds. |
| Switching Frequency | 1MHz (typical), adjustable 0.8–1.25MHz via SYNC_IN - enables small external magnetics and predictable EMI filtering. |
| Feedback Reference | 0.5V ±2.5% - sets output voltage via resistor divider; allows 0.5V–5.5V regulation with standard 1% resistors. |
| Quiescent Current | <1mA during switching, <1µA in shutdown - extends battery life in always-on or sleep-mode applications. |
| Efficiency | >95% at mid-load - minimizes thermal dissipation in sealed enclosures and reduces need for heatsinking. |
| Package | MSOP-10L (3mm × 3mm) - surface-mount compatible with standard reflow profiles and automated assembly. |
Pinout & Package
The MIC2203BMM is housed in a 10-pin MSOP (Mini Small Outline Package) with exposed pad not present - distinct from the MLF-10L variant which includes an EP ground pad. Pin numbering follows standard top-view orientation with Pin 1 at bottom-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Switch Node Output | Drives external inductor; connects internally to high-side P-MOSFET drain and low-side N-MOSFET source. |
| 2 (VIN) | Main Power Input | Supplies both power stage and internal bias; requires ≥1µF ceramic bypass capacitor to GND. |
| 3 (SYNC_IN) | External Clock Input | Accepts TTL/CMOS-compatible sync signal (0.7–1.7V threshold); ties to GND when unused. |
| 4 (SYNC_OUT) | Synchronization Pulse Output | Open-collector 50ns pulse at oscillator frequency; requires external 10kΩ pull-up for daisy-chaining. |
| 5 (EN) | Enable Control Input | Active-high logic input; <0.5V disables regulator and reduces current to <1µA. |
| 6 (FB) | Feedback Input | Connects to resistor divider midpoint; compares against 0.5V internal reference to regulate output voltage. |
| 7 (BIAS) | Internal Bias Supply | Provides ~2.3V for internal circuitry; requires 10nF ceramic bypass capacitor - not for external loading. |
| 8–10 (GND) | Signal Ground | All three pins are internally connected to common ground plane; must be tied to PCB ground pour. |
Key Features
| Feature | Design Value |
|---|---|
| All-ceramic component support | Enables compact, low-profile designs using only X5R/X7R MLCCs for input, output, and bias capacitors - no electrolytics required. |
| SYNCLOCK daisy-chain capability | Allows multiple MIC2203BMM units to synchronize via SYNC_OUT → SYNC_IN routing, eliminating beat frequencies in multi-rail systems. |
| Ultra-fast transient response | High loop bandwidth (~100kHz gain-bandwidth) reduces required output capacitance and improves regulation during CPU core load steps. |
| Integrated synchronous MOSFETs | Eliminates external Schottky diode and associated conduction losses - improves efficiency and simplifies layout. |
| Thermal and current protection | Includes foldback current limit and thermal shutdown with 20°C hysteresis - prevents damage during overload or poor heatsinking. |
Applications
| 802.11 WLAN Modules | MP3/MD Audio Players |
|---|---|
Use Scenario: Powering 1.8V or 3.3V RF transceiver ICs and baseband processors in compact wireless modules. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator delivering clean, low-noise 300mA output with minimal ripple. Use Value: 1MHz fixed-frequency operation avoids interference with 2.4GHz ISM band harmonics; SYNC_IN allows shifting fundamental away from sensitive IF bands. |
Use Scenario: Supplying DSP, DAC, and headphone amplifier stages in portable audio devices with strict battery life targets. IC Role / Device Role / Timing Role: High-efficiency buck converter operating in discontinuous and continuous conduction modes across dynamic load profiles. Use Value: <1mA quiescent current preserves battery runtime during pause/play transitions; all-ceramic design ensures stable audio performance without capacitor aging effects. |
| Handheld PDAs | Low-Power Microcontroller Subsystems |
Use Scenario: Generating multiple low-voltage rails (e.g., 1.2V core, 1.8V I/O) from a shared Li-ion battery in space-constrained PDAs. IC Role / Device Role / Timing Role: Adjustable-output synchronous buck regulator supporting fast load transients from CPU burst activity. Use Value: Fast transient response (<10µs recovery) maintains regulation during processor wake-up events; MSOP-10L footprint fits tight board real estate. |
Use Scenario: Providing stable 0.5V–3.3V supply to ultra-low-power MCUs (e.g., ARM Cortex-M0+) in sensor nodes and IoT edge devices. IC Role / Device Role / Timing Role: Enable-controlled power rail with deep shutdown mode for system-level power gating. Use Value: <1µA shutdown current enables years of operation on coin-cell batteries; FB pin precision supports accurate low-VDD operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 3MHz switching frequency, 400mA output, 0.6V reference, WSON-6 package | Better suited for ultra-compact layouts but lacks SYNC_IN/SYNC_OUT and has higher quiescent current (2.5µA typical) | Select when board area is critical and 1MHz EMI constraints are relaxed; verify feedback network compatibility with 0.6V reference. |
| RT8059NGSP | 1.5MHz fixed frequency, 600mA output, 0.6V reference, SOP-8 package | Higher current capability and wider VIN range (2.5–5.5V), but no synchronization capability and larger thermal resistance (θJA = 120°C/W) | Choose for higher load demands where daisy-chaining is unnecessary and MSOP-10L footprint is not required. |
Compared with TPS62231DRYR and RT8059NGSP, the MIC2203BMM offers unique synchronization flexibility and ultra-low quiescent current in a thermally optimized MSOP-10L package - making it preferred for noise-sensitive, battery-operated RF/audio systems requiring coordinated multi-rail timing.
Availability
MIC2203BMM is available at Aetrix Electronics and suitable for 802.11 WLAN modules, MP3 players, and handheld PDAs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MIC2203BMM 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 analog and mixed-signal semiconductor company specializing in power management, interface, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC2203 product line was engineered for high-efficiency, low-noise DC-DC conversion in portable RF and audio applications - emphasizing synchronization, fast transient response, and ceramic-capacitor compatibility.
FAQ
What is the minimum output voltage supported by the MIC2203BMM?
The MIC2203BMM supports output voltages down to 0.5V, set by an external resistor divider connected to the FB pin. Its internal 0.5V reference voltage allows precise regulation across the full 0.5V–5.5V range using standard 1% resistors - confirmed in the Electrical Characteristics table under "Feedback Voltage" (0.4875V to 0.5125V).
Does the MIC2203BMM require an external Schottky diode?
No, the MIC2203BMM does not require an external Schottky diode because it integrates synchronous rectification using an internal N-channel MOSFET for the low-side switch. This eliminates reverse recovery losses and improves efficiency - explicitly stated in the "PWM Operation" section of the datasheet.
Can multiple MIC2203BMM regulators be synchronized to the same clock source?
Yes, the MIC2203BMM supports synchronization via its SYNC_IN and SYNC_OUT pins. A master device's SYNC_OUT can drive the SYNC_IN of one or more slave MIC2203BMM units, enabling daisy-chained frequency alignment - a feature documented in both the "Features" list and "Synchronization" application section.
What is the recommended input capacitor for the MIC2203BMM?
A minimum 1µF X5R or X7R ceramic capacitor is recommended on the VIN pin, placed as close as possible to Pins 1 (SW) and 2 (VIN). Y5V dielectrics are discouraged due to capacitance loss over temperature and high-frequency resistive behavior - per the "Input Capacitor" subsection in the Application Information section.
Is the MIC2203BMM pin-compatible with the MIC2203YMM?
Yes, the MIC2203BMM and MIC2203YMM share identical pinout, package (MSOP-10L), electrical specifications, and functional behavior - differing only in lead-free compliance (YMM = Pb-free, BMM = standard). This is confirmed in the Ordering Information table and Pin Configuration section of the datasheet.
MIC2203BMM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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-MSOP
MIC2203BMM FAQ
1.How can I place an order for MIC2203BMM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2203BMM 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 MIC2203BMM reliable?
The price and inventory of MIC2203BMM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2203BMM is usually 5 days.
3.What payment methods are accepted for MIC2203BMM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2203BMM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2203BMM?
MIC2203BMM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2203BMM 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 MIC2203BMM?
For technical support, including MIC2203BMM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2203BMM requirements.
6.How does Aetrix verify that MIC2203BMM is sourced from the original manufacturer or authorized distributors?
All MIC2203BMM 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 MIC2203BMM meets industry standards.
7.What is the process for return or replacement of MIC2203BMM?
All MIC2203BMM units undergo pre-shipment inspection (PSI). If there is an issue with MIC2203BMM, 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 MIC2203BMM part is unused and in its original packaging.
Return procedure for MIC2203BMM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2203BMM 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…
