My Inquiry
My Account
Microchip Technology MIC2570-2BM-TR
- Part No.:
- MIC2570-2BM-TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC2570-2BM-TR.pdf
- Description:
- IC REG BST SEPIC ADJ 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,378
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC2570-2BM-TR from Micrel is an adjustable-output, micropower boost switching regulator optimized for battery-powered systems. It operates from 1.3V to 15V input, delivers up to 36V output via external resistor network, features 20kHz fixed-frequency operation with SYNC capability, 130µA quiescent current, and integrates a 1A current-limited NPN switch - used in LCD bias generation, handheld medical instruments, and dual-cell alkaline-to-high-voltage converters.
For engineers reviewing the MIC2570-2BM-TR datasheet, MIC2570-2BM-TR pinout, MIC2570-2BM-TR application, or MIC2570-2BM-TR equivalent, key selection criteria include its adjustable 0.22V reference, FB pin feedback architecture, SOIC-8 package thermal limits (θJA = 140°C/W), and compatibility with low-ESR tantalum output capacitors in space-constrained portable designs.
Technical Context
The MIC2570-2BM-TR employs a gated oscillator topology with a precision 0.22V bandgap reference and comparator-based regulation. Its internal NPN switch is driven by an AND-gated oscillator, enabling discontinuous conduction mode operation that minimizes quiescent current at light loads.
Feedback is applied to the FB pin, where the device regulates output voltage using an external resistive divider referenced to 0.22V. The SYNC pin accepts falling-edge-triggered external clock signals to synchronize switching frequency and reduce EMI in noise-sensitive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.3V to 15V - supports two alkaline/NiMH cells or one Li-ion cell across full discharge curve. |
| Output Voltage Range | Up to 36V - set externally via resistor divider on FB pin; enables flexible high-voltage bias generation. |
| Quiescent Current | 130µA typical - ensures ultra-low standby power draw critical for battery life in portable devices. |
| Switch Current Limit | 1.1A - protects internal NPN transistor and external inductor during overload or short-circuit conditions. |
| Oscillator Frequency | 20kHz fixed - simplifies EMI filtering; synchronizable via SYNC pin to align with system clocks. |
| Reference Voltage | 0.22V ±12mV - stable bandgap reference enables accurate output regulation independent of input or temperature. |
| Operating Temperature | –40°C to +85°C - validated for industrial and consumer portable equipment environments. |
Pinout & Package
Package: 8-pin SOIC (M), 150 mil width, θJA = 140°C/W, rated for 400mW power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Supply Input | Positive input voltage connection (1.3V–15V); must be decoupled with ≥100µF low-ESR capacitor. |
| SYNC | Synchronization Input | Falling-edge triggered; resets oscillator to align switching with external clock and reduce system noise. |
| FB | Feedback Input | Connects to voltage divider output; comparator compares divider output to 0.22V reference to regulate VOUT. |
| NC | No Connect | Pins 3, 4, and 5 are unconnected internally - must remain floating or grounded per layout guidelines. |
| SW | Switch Collector | Drives external inductor; NPN collector node switching at 20kHz - requires Schottky catch diode and proper PCB routing. |
| GND | Power Ground | Emiter connection of internal NPN switch; serves as return path for inductor current and IC ground reference. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Up to 36V | Enables single-chip generation of high-bias voltages for LCDs, detectors, and analog front-ends without external regulators. |
| 20kHz Gated Oscillator | Reduces light-load quiescent current by disabling switch when output is regulated - improves battery runtime in intermittent-use devices. |
| 0.22V Precision Reference | Provides stable feedback threshold across –40°C to +85°C, enabling tight output tolerance (<±3%) with standard 1% resistors. |
| SYNC Pin for EMI Control | Allows deterministic timing alignment with host MCU or system clock - essential for meeting CISPR-22 Class B conducted emissions limits. |
| 1A Internal Current Limit | Soft-limiting behavior prevents destructive inductor saturation while maintaining safe thermal operation under transient overloads. |
Applications
| LCD Bias Generator | Glucose Meter Power Supply |
|---|---|
Use Scenario: Generating +12V and –5V rails from two AA cells for segment LCD display and op-amp biasing in portable diagnostic tools. IC Role / Device Role / Timing Role: Primary boost regulator controlling inductor energy transfer via SW pin; FB pin sets positive rail, while inverted topology generates negative rail. Use Value: Eliminates need for separate charge-pump ICs - reduces BOM count and PCB area while supporting 40mA output at >75% efficiency. | Use Scenario: Converting 2.0–3.1V from alkaline cells to stable 3.3V for microcontroller, sensor ADC, and Bluetooth LE radio in FDA-cleared handheld glucose meters. IC Role / Device Role / Timing Role: Main DC-DC converter supplying regulated 3.3V at up to 150mA; SYNC pin aligned to MCU sleep-wake cycle to minimize burst-mode noise during measurement. Use Value: 130µA quiescent current extends battery life beyond 6 months in low-duty-cycle operation; SOIC-8 allows compact 0.6 in² layout. |
| Two-Cell Alkaline to ±5V Converter | Battery Backup Supply |
Use Scenario: Providing symmetrical ±5V outputs from two AA cells for op-amp signal conditioning and data acquisition circuits in portable test equipment. IC Role / Device Role / Timing Role: Boost stage generating +5V; followed by inverting buck-boost stage using same SW node and external components to derive –5V. Use Value: Achieves ±5V/50mA with <150mV ripple using MBRA140 Schottky diodes and 47µH inductor - meets precision analog requirements without LDO post-regulation. | Use Scenario: Maintaining real-time clock (RTC) and SRAM retention during main power loss in industrial controllers powered by 3.6V lithium primary cells. IC Role / Device Role / Timing Role: Low-quiescent boost regulator sustaining 3.3V backup rail from depleted 2.0V input; FB divider configured for 3.3V with hysteresis to prevent oscillation near cutoff. Use Value: Operates down to 1.3V input - extends usable battery capacity by >20% compared to fixed 2.0V UVLO alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Charge-pump topology; fixed ±5V output; no inductor required; 100kHz switching; max 100mA output. | Limited to fixed dual-rail outputs; unsuitable for >12V or adjustable applications; lower peak efficiency above 5V. | Prefer for ultra-low-noise, inductor-free ±5V generation in space-constrained RTC backup; avoid for >12V or variable-VOUT needs. |
| TPS61040DRVR | 28V max output; 500kHz switching; 28µA quiescent current; integrated 500mA switch; requires external compensation. | Higher frequency enables smaller magnetics but increases EMI sensitivity; lower IQ benefits long-term standby, but 500mA limit restricts high-current bias rails. | Choose for compact, high-efficiency 3.3V/5V boost in modern portable designs; not suitable for 36V LCD bias or legacy SOIC layouts. |
Compared with MAX680ESA+ and TPS61040DRVR, the MIC2570-2BM-TR uniquely supports 36V adjustable output in a legacy SOIC-8 package with proven reliability in medical and industrial battery systems - making it optimal for high-voltage bias generation where layout continuity and long-term supply stability are critical.
Availability
MIC2570-2BM-TR is available at Aetrix Electronics and suitable for LCD bias generation, handheld medical instrumentation, and dual-cell alkaline-to-high-voltage converters requiring stable component supply across extended production lifecycles.
Supply support for MIC2570-2BM-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, Inc. was a U.S.-based analog and mixed-signal semiconductor company founded in 1978 and acquired by Microchip Technology in 2015; known for high-reliability power management and interface ICs.
The MIC2570 product line was designed specifically for ultra-low-power, high-voltage boost conversion in battery-operated portable electronics - emphasizing wide input range, minimal quiescent current, and robust thermal performance in SOIC packaging.
FAQ
What is the maximum output voltage supported by the MIC2570-2BM-TR?
The MIC2570-2BM-TR supports a maximum output voltage of 36V, as specified in its Absolute Maximum Ratings and confirmed in Electrical Characteristics. This limit applies to the SW pin voltage and defines the upper bound for configurations using the FB pin and external resistor divider - exceeding 36V risks permanent damage to the internal NPN switch.
Can the MIC2570-2BM-TR operate from a single lithium cell?
Yes, the MIC2570-2BM-TR operates from a single lithium cell (2.5V–4.2V nominal), as explicitly stated in the General Description and validated in Application Example 4. Its 1.3V minimum input enables use across the full discharge curve, including deep depletion down to 1.3V - making it suitable for long-life Li-primary or rechargeable Li-ion systems.
What is the function of the FB pin on the MIC2570-2BM-TR?
The FB pin on the MIC2570-2BM-TR is the feedback input that connects to the center tap of an external resistor divider. The internal comparator references this node to a precise 0.22V bandgap voltage, enabling regulation of VOUT = 0.22V × (1 + Rtop/Rbottom). This architecture provides full adjustability up to 36V with standard 1% resistors.
How does the SYNC pin affect the operation of the MIC2570-2BM-TR?
The SYNC pin on the MIC2570-2BM-TR accepts a falling-edge-triggered external clock signal to reset the internal oscillator. This forces deterministic switching alignment, reducing broadband EMI and enabling noise correlation with system clocks - critical for passing EMC compliance in medical and industrial handheld devices using the MIC2570-2BM-TR.
Is the MIC2570-2BM-TR pin-compatible with the MIC2570-1BM-TR?
No, the MIC2570-2BM-TR is not pin-compatible with the MIC2570-1BM-TR. While both use the same 8-pin SOIC package, their pin functions differ: MIC2570-1BM-TR uses pins 4–6 for 5V/3.3V/2.85V feedback inputs, whereas MIC2570-2BM-TR assigns those pins as NC and uses pin 6 exclusively for FB - requiring distinct PCB layouts and external component networks for each variant.
MIC2570-2BM-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.3V
- Voltage - Input (Max):
- 15V
- Voltage - Output (Min/Fixed):
- 1.3V
- Voltage - Output (Max):
- 36V (Switch)
- Current - Output:
- 1A (Switch)
- Frequency - Switching:
- 20kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MIC2570-2BM-TR FAQ
1.How can I place an order for MIC2570-2BM-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2570-2BM-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 MIC2570-2BM-TR reliable?
The price and inventory of MIC2570-2BM-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2570-2BM-TR is usually 5 days.
3.What payment methods are accepted for MIC2570-2BM-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2570-2BM-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2570-2BM-TR?
MIC2570-2BM-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2570-2BM-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 MIC2570-2BM-TR?
For technical support, including MIC2570-2BM-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2570-2BM-TR requirements.
6.How does Aetrix verify that MIC2570-2BM-TR is sourced from the original manufacturer or authorized distributors?
All MIC2570-2BM-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 MIC2570-2BM-TR meets industry standards.
7.What is the process for return or replacement of MIC2570-2BM-TR?
All MIC2570-2BM-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2570-2BM-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 MIC2570-2BM-TR part is unused and in its original packaging.
Return procedure for MIC2570-2BM-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2570-2BM-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…
