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Microchip Technology MIC2570-2YM
- Part No.:
- MIC2570-2YM
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC2570-2YM.pdf
- Description:
- IC REG BST SEPIC ADJ 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:277
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Product details
Overview
MIC2570-2YM from Micrel is an adjustable-output boost switching regulator IC designed for battery-powered systems, operating from 1.3V to 15V input and delivering up to 36V output with 20kHz fixed-frequency operation, 130µA quiescent current, and internal 1.1A current-limited NPN switch - used in handheld medical instruments, LCD bias supplies, and portable converters.
For engineers reviewing the MIC2570-2YM datasheet, MIC2570-2YM pinout, MIC2570-2YM application, or MIC2570-2YM equivalent, key selection criteria include feedback reference voltage (0.22V), SYNC input for noise reduction, SOIC-8 thermal performance (θJA = 140°C/W), and compatibility with low-ESR tantalum output capacitors in space-constrained designs.
Technical Context
The MIC2570-2YM implements a gated oscillator architecture with a precision 0.22V bandgap reference and comparator-based control loop. Its internal NPN switch operates with 250–450mV saturation voltage across 1.3–3.0V input and 300–800mA load, enabling high-efficiency discontinuous conduction mode at light loads.
Feedback is applied via external resistor divider to the FB pin, where 25nA input bias current ensures minimal loading error. The SYNC input accepts falling-edge-triggered external clocks to synchronize switching and reduce EMI, while built-in 6mV comparator hysteresis prevents oscillation near regulation threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.3V to 15V - supports two alkaline/NiMH cells or single Li-ion over full discharge curve. |
| Output Voltage Range | Input voltage to 36V - adjustable via external resistor divider on FB pin. |
| Quiescent Current | 130µA typical - enables micropower operation in battery-backed or low-duty-cycle systems. |
| Switch Current Limit | 1.1A - protects internal NPN transistor and external inductor during overload or short-circuit. |
| Oscillator Frequency | 20kHz fixed - balances efficiency, inductor size, and audible noise avoidance. |
| Reference Voltage | 0.22V ±12mV - sets output accuracy and defines feedback network scaling ratio. |
| Thermal Resistance | θJA = 140°C/W - requires careful PCB copper area planning for >100mA continuous output in SOIC-8. |
Pinout & Package
Package: 8-lead SOIC (M), 3.99mm × 4.90mm body, 1.27mm pitch, θJA = 140°C/W, rated for –40°C to +85°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Switch collector | NPN transistor output node - connects to inductor and flyback diode anode; handles peak currents up to 1.1A. |
| 2 (GND) | Power ground | Emiter connection of internal NPN switch - must be low-impedance path to minimize switching noise and thermal rise. |
| 3 (NC) | No connect | Not internally bonded - leave unconnected; no routing or thermal relief required. |
| 4 (NC) | No connect | Not internally bonded - leave unconnected; no routing or thermal relief required. |
| 5 (NC) | No connect | Not internally bonded - leave unconnected; no routing or thermal relief required. |
| 6 (FB) | Feedback input | 0.22V reference comparator input - connects to center tap of external resistor divider; 25nA bias current minimizes divider error. |
| 7 (SYNC) | Synchronization input | Falling-edge triggered - resets oscillator phase; tie to GND if unused to prevent spurious triggering. |
| 8 (IN) | Supply input | Positive input rail - accepts 1.3–15V; requires local 100µF low-ESR capacitor for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Gated oscillator architecture | Disables switch when output is regulated - reduces quiescent current to 130µA and improves light-load efficiency. |
| Adjustable output up to 36V | Uses external resistor divider on FB pin - enables custom output voltages without changing IC, e.g., 12V, 24V, or –24V with inverting topology. |
| 20kHz fixed-frequency operation | Optimized duty cycle (67%) for ~3× step-up ratios - simplifies EMI filtering and avoids audible noise in portable devices. |
| SYNC input for noise control | Allows synchronization to system clock - correlates switching edges to reduce broadband EMI in mixed-signal applications. |
| Internal 1.1A current limit | Soft-limiting reduces duty cycle and increases frequency under overload - protects inductor and switch without external sensing components. |
Applications
| LCD Bias Generator | Glucose Meter Power Supply |
|---|---|
Use Scenario: Generating +12V and –5V from two AA cells for TFT-LCD panel driver ICs requiring dual-rail bias. IC Role / Device Role / Timing Role: Boost regulator providing stable high-voltage rails with low quiescent current to extend battery life between calibrations. Use Value: Enables compact, battery-operated LCD modules using only four external components (inductor, diode, two capacitors) in ≤0.6 in² area. | Use Scenario: Converting 2.0–3.1V from two alkaline cells to regulated 3.3V for microcontroller, sensor, and display subsystems. IC Role / Device Role / Timing Role: Primary DC-DC converter supplying clean 3.3V at up to 150mA with <120mV output hysteresis for stable ADC reference. Use Value: Delivers consistent performance across full battery discharge range while consuming only 130µA idle current. |
| Handheld Instrument Converter | Portable Detector Power Source |
Use Scenario: Powering multi-range analog front-end and data logger in field-deployable environmental sensors. IC Role / Device Role / Timing Role: Adjustable boost stage generating 5V, 12V, or 24V outputs depending on sensor module configuration. Use Value: Single IC supports multiple detector variants via resistor divider change - reduces BOM count and qualification effort. | Use Scenario: Providing isolated ±5V rails for photodiode transimpedance amplifiers and signal conditioning in battery-powered gas detectors. IC Role / Device Role / Timing Role: Core switching regulator in inverting topology, driving charge-pump or transformer-isolated auxiliary supplies. Use Value: Achieves –5V output with <1% regulation error using standard external components and no additional controller IC. |
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 dual output; no inductor required; 100kHz switching; 100mA max output. | Lower output current and fixed voltage - suitable only for low-power logic bias, not adjustable analog rails. | Select when board space is critical and output voltage is fixed; avoid for >100mA or >±5V requirements. |
| TPS61040DRVR | Current-mode PWM controller; 500kHz switching; 28V max output; 0.4A switch; 25µA quiescent current. | Higher frequency enables smaller magnetics but requires tighter layout; lower current limit restricts high-power loads. | Prefer for compact, high-efficiency designs needing >200mA; verify thermal performance in SO-8 package at full load. |
Compared with MAX680ESA+ and TPS61040DRVR, the MIC2570-2YM offers higher output voltage (36V vs. 28V/±5V), robust 1.1A switch for demanding loads, and proven reliability in medical handhelds - at the cost of larger inductor size and lower switching frequency.
Availability
MIC2570-2YM is available at Aetrix Electronics and suitable for LCD bias generators, glucose meters, and battery-powered handheld instruments requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC2570-2YM 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 power management semiconductor company acquired by Microchip Technology in 2015; known for high-reliability DC-DC converters and timing solutions.
The MIC2570 product line was engineered for ultra-low-power, wide-input-voltage boost conversion in portable medical, instrumentation, and consumer electronics - emphasizing micropower operation, minimal external component count, and rugged SOIC packaging.
FAQ
What is the minimum input voltage required for MIC2570-2YM startup?
The MIC2570-2YM guarantees startup at 1.3V input with 100mA switch current. Below this, the internal oscillator may not initiate switching. At 1.3V, the switch saturation voltage reaches 250mV, so practical minimum VIN depends on required output headroom and inductor DCR. Always verify operation across the full battery discharge curve in final design.
Can MIC2570-2YM generate negative output voltages?
Yes - MIC2570-2YM can drive inverting topologies such as Ćuk or inverting buck-boost to generate negative rails. Example 8 in the datasheet demonstrates –24V generation using external resistors and diodes. Output polarity reversal requires careful layout of ground return paths and isolation of feedback network from noisy switching nodes.
What is the purpose of the SYNC pin on MIC2570-2YM?
The SYNC pin on MIC2570-2YM accepts a falling-edge-triggered external clock to synchronize the internal 20kHz oscillator. This reduces broadband EMI by correlating switching noise to a known system frequency. When unused, SYNC must be tied to GND to prevent erratic operation - floating inputs may cause unpredictable frequency shifts or dropout.
How does the MIC2570-2YM achieve low quiescent current?
The MIC2570-2YM achieves 130µA typical quiescent current through gated oscillator architecture: the internal switch disables entirely when output voltage exceeds the 0.22V feedback threshold, eliminating switching losses and minimizing supply current. This behavior is confirmed across –40°C to +85°C and is independent of load current below regulation threshold.
What external components are mandatory for MIC2570-2YM operation?
MIC2570-2YM requires four mandatory external components: an inductor (e.g., 47µH), Schottky diode (e.g., MBRA140), input capacitor (≥100µF low-ESR), and output capacitor (≥220µF low-ESR). The feedback resistor divider is also mandatory for adjustable output - omitting any of these causes failure to regulate or device damage under load.
MIC2570-2YM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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
MIC2570-2YM FAQ
1.How can I place an order for MIC2570-2YM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2570-2YM 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 MIC2570-2YM reliable?
The price and inventory of MIC2570-2YM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2570-2YM is usually 5 days.
3.What payment methods are accepted for MIC2570-2YM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2570-2YM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2570-2YM?
MIC2570-2YM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2570-2YM 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 MIC2570-2YM?
For technical support, including MIC2570-2YM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2570-2YM requirements.
6.How does Aetrix verify that MIC2570-2YM is sourced from the original manufacturer or authorized distributors?
All MIC2570-2YM 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 MIC2570-2YM meets industry standards.
7.What is the process for return or replacement of MIC2570-2YM?
All MIC2570-2YM units undergo pre-shipment inspection (PSI). If there is an issue with MIC2570-2YM, 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 MIC2570-2YM part is unused and in its original packaging.
Return procedure for MIC2570-2YM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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