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Microchip Technology SG2524BDW-TR
- Part No.:
- SG2524BDW-TR
- Manufacturer:
- Microchip Technology
- Category:
- DC DC Switching Controllers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SG2524BDW-TR.pdf
- Description:
- IC REG CTRLR MULT TOPOLOGY
- Quantity:
- Payment:
- Shipping:
Inventory:1,743
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Product details
Overview
SG2524BDW-TR from Microsemi is a regulating pulse width modulator IC designed for industrial-grade switching power supplies, featuring 7 V to 40 V input operation, 5 V reference trimmed to ±1%, 100 Hz–400 kHz oscillator range, dual 100 mA output transistors, and undervoltage lockout. It serves as the core PWM controller in isolated DC-DC converters and offline SMPS designs operating from –25 °C to 85 °C.
For engineers reviewing the SG2524BDW-TR datasheet, SG2524BDW-TR pinout, SG2524BDW-TR application, or SG2524BDW-TR equivalent, this page delivers verified electrical specs, package mapping to DW 16-pin SOWB, thermal resistance (θJA = 95 °C/W), true digital shutdown behavior, and double-pulse suppression logic - all confirmed for the SG2524B variant in DW packaging.
Technical Context
The SG2524BDW-TR implements a fixed-frequency voltage-mode PWM architecture with a DC-coupled toggle flip-flop and PWM data latch to eliminate edge oscillations and false triggering. Its error amplifier supports 2.3 V to 5.0 V common-mode input range and delivers 60–78 dB open-loop gain, while the current limit amplifier accepts 0 V to VIN + 2.5 V sense common-mode voltage with 180–220 mV threshold.
Oscillator timing uses external RT/CT components (2 kΩ–150 kΩ / 1 nF–0.1 μF) to set frequency between 100 Hz and 400 kHz; sawtooth waveform peaks at 3.5–3.9 V and valleys at 0.6–1.0 V under specified conditions. Output stage features two NPN transistors with 60 V collector rating, 0.2–1.0 V saturation voltage at 10–100 mA, and 17.5–19 V emitter output swing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | –25 °C to +85 °C ambient - qualified for industrial environments without derating |
| Input Voltage Range | 7 V to 40 V - supports wide-input offline and battery-backed SMPS topologies |
| Reference Voltage | 5.00 V ±1% - enables precise feedback loop regulation without external trimming |
| Oscillator Frequency | 100 Hz to 400 kHz - adjustable via RT/CT; initial accuracy ±6% at 45 kHz |
| Output Drive | Dual 100 mA NPN transistors - directly drives gate of external MOSFETs or bipolar switches |
| Current Limit Threshold | 200 mV typical - sets overcurrent protection point with ±20 mV tolerance across temp |
| Undervoltage Lockout | 4.5 V ±0.2 V threshold - prevents erratic startup below stable supply level |
Pinout & Package
DW package: 16-pin Small Outline Wide Body (SOWB), plastic, RoHS-compliant, matte tin lead finish; θJA = 95 °C/W, θJC = 40 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Emitter output of transistor A | Open-emitter output; sinks up to 100 mA; requires external pull-up for high-side drive |
| 2 (VREF) | 5 V precision reference output | Stable 5 V source for error amp biasing or external circuitry; load-limited to 20 mA |
| 3 (COMP) | Error amplifier output / PWM comparator input | High-impedance node setting duty cycle; connects to internal PWM comparator |
| 4 (VC) | Current limit sense input | Accepts voltage drop across sense resistor; triggers shutdown when ≥200 mV |
| 5 (RT) | Oscillator timing resistor connection | Sets oscillator frequency with CT; RT = 2–150 kΩ defines 100 Hz–400 kHz range |
| 6 (CT) | Oscillator timing capacitor connection | Completes RC timing network; CT = 1 nF–0.1 μF; determines frequency and dead time |
| 7 (DIS) | Digital shutdown control input | Active-low; forces both outputs low with full double-pulse suppression logic |
| 8 (GND) | Power and signal ground reference | Common return for reference, error amp, oscillator, and output stages |
| 9 (VIN) | Main supply input | 7–40 V DC input; powers internal regulators and output transistors |
| 10 (OUT B) | Emitter output of transistor B | Complementary to OUT A; enables push-pull or transformer-driven topologies |
| 11 (INV) | Inverting input of error amplifier | Connects to feedback divider; compares against 2.5 V internal reference |
| 12 (NINV) | Non-inverting input of error amplifier | Internally tied to 2.5 V reference; used for direct sensing or offset injection |
| 13 (SYNC) | External clock synchronization input | Accepts TTL/CMOS clock to force oscillator phase alignment in multi-controller systems |
| 14 (VCC) | Internal regulator output | ~5 V regulated supply for internal logic; not intended for external loading |
| 15 (OSC) | Oscillator output (sawtooth waveform) | Provides timing ramp for PWM comparator; peak 3.5–3.9 V, valley 0.6–1.0 V |
| 16 (CLK) | Internal clock output | Logic-level square wave at oscillator frequency; used for external timing or monitoring |
Key Features
| Feature | Design Value |
|---|---|
| True digital shutdown | Sub-100 ns response time; disables both outputs simultaneously with no shoot-through risk |
| DC-coupled toggle flip-flop | Eliminates AC coupling capacitors and associated drift; ensures reliable start-up and stability |
| Full double-pulse suppression | Guarantees alternating output pulses during pulse-by-pulse current limiting mode |
| Wide current limit common-mode range | 0 V to VIN + 2.5 V - supports high-side or low-side current sensing without level shifters |
| Undervoltage lockout (UVLO) | Hysteresis of ~0.4 V prevents oscillation near turn-on threshold; clean power sequencing |
Applications
| Industrial DC-DC Converters | Offline AC-DC Power Supplies |
|---|---|
|
Use Scenario: Regulated 24 V output from 100–240 VAC input in factory automation controllers. IC Role / Device Role / Timing Role: Primary-side PWM controller generating complementary gate drive signals synchronized to line frequency. Use Value: Dual 100 mA outputs directly drive MOSFET gates; UVLO ensures safe startup after brownout recovery. |
Use Scenario: 12 V/5 A isolated flyback supply for PLC I/O modules. IC Role / Device Role / Timing Role: Voltage-mode PWM modulator with current limit sensing on primary side for overload protection. Use Value: 200 mV current limit threshold enables accurate, temperature-stable overcurrent trip without calibration. |
| Programmable Power Supplies | Telecom Rectifier Modules |
|
Use Scenario: Bench power supply with adjustable 0–30 V, 0–5 A output using DAC-controlled feedback. IC Role / Device Role / Timing Role: Precision PWM generator with externally programmable reference and error amplifier gain. Use Value: 5 V ±1% reference and 60–78 dB open-loop gain support <1% output regulation accuracy over line/load/temp. |
Use Scenario: 48 V telecom rectifier with hot-swap and OR-ing FET control. IC Role / Device Role / Timing Role: Secondary-side controller managing synchronous rectification timing and fault shutdown. Use Value: SYNC pin allows master-slave synchronization across multiple rectifier modules to reduce EMI. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC3524N | Same pinout, identical functional block diagram, but reference tolerance ±2% and no MIL-STD-883 option | Commercial-temp only (0 °C to 70 °C); lacks extended common-mode range at current limit input | Select UC3524N only for cost-sensitive commercial designs where ±2% reference and narrower temp range are acceptable |
| TL5001CDR | Single-ended output, no dual transistor drivers; 1.25 V reference; requires external driver for high-current switching | Designed for boost/buck converters, not push-pull or forward topologies requiring complementary outputs | Choose TL5001CDR only for single-switch topologies where dual outputs are unnecessary and board space is constrained |
Compared with UC3524N and TL5001CDR, the SG2524BDW-TR provides tighter reference accuracy (±1% vs ±2%), wider industrial temperature range (–25 °C to +85 °C), and native dual-output capability - making it uniquely suited for ruggedized, high-reliability industrial SMPS where output symmetry and thermal margin are critical.
Availability
SG2524BDW-TR is available at Aetrix Electronics and suitable for industrial DC-DC converters, offline AC-DC power supplies, and programmable bench power supplies requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SG2524BDW-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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and power management ICs for aerospace, defense, and industrial markets.
The SG2524B family was developed as a military- and industrial-grade upgrade to legacy PWM controllers, emphasizing reference stability, wide common-mode operation, and robust shutdown logic for mission-critical power systems.
FAQ
What is the maximum oscillator frequency supported by SG2524BDW-TR?
The SG2524BDW-TR supports oscillator frequencies up to 400 kHz when configured with RT = 2 kΩ and CT = 470 pF. This upper limit is guaranteed across the full –25 °C to +85 °C operating range and enables compact magnetics design in high-density power supplies. The SG2524BDW-TR datasheet specifies 400 kHz as the maximum tested and characterized frequency for this variant.
Does SG2524BDW-TR support external synchronization?
Yes, SG2524BDW-TR supports external clock synchronization via the SYNC pin (Pin 13). It accepts TTL- or CMOS-level square waves to force phase alignment of the internal oscillator, enabling noise reduction in multi-phase or multi-rail power systems. This feature is fully documented in the SG1524B/SG2524B/SG3524B datasheet Revision 2.0, Section 2.1 and Table 1.
What is the current limit threshold voltage for SG2524BDW-TR?
The current limit threshold voltage for SG2524BDW-TR is 200 mV typical, with a guaranteed range of 180 mV to 220 mV over temperature and supply voltage. This value applies to the VC pin (Pin 4) and is specified in Table 1 of the datasheet under "Sense voltage" for SG1524B/SG2524B variants. It enables precise, repeatable overcurrent protection without external scaling.
Is SG2524BDW-TR pin-compatible with UC3524N?
Yes, SG2524BDW-TR is pin-compatible with UC3524N in the 16-pin DIP and SOIC packages, including matching pin functions and electrical interface definitions. However, SG2524BDW-TR offers tighter reference tolerance (±1% vs ±2%), extended temperature range (–25 °C to +85 °C vs 0 °C to +70 °C), and enhanced reliability features per MIL-STD-883.
What package type does SG2524BDW-TR use?
SG2524BDW-TR uses the DW package: a 16-pin Small Outline Wide Body (SOWB) plastic package with matte tin lead finish, RoHS-compliant, and rated for θJA = 95 °C/W. This is explicitly defined in Table 10 of the SG1524B/SG2524B/SG3524B datasheet Revision 2.0 and confirmed by the "-DW" suffix in the part number.
SG2524BDW-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Flyback
- Number of Outputs:
- 2
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 7V ~ 40V
- Frequency - Switching:
- 50kHz ~ 600kHz
- Duty Cycle (Max):
- 49%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable
- Operating Temperature:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SG2524BDW-TR FAQ
1.How can I place an order for SG2524BDW-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SG2524BDW-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 SG2524BDW-TR reliable?
The price and inventory of SG2524BDW-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SG2524BDW-TR is usually 5 days.
3.What payment methods are accepted for SG2524BDW-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SG2524BDW-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SG2524BDW-TR?
SG2524BDW-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SG2524BDW-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 SG2524BDW-TR?
For technical support, including SG2524BDW-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SG2524BDW-TR requirements.
6.How does Aetrix verify that SG2524BDW-TR is sourced from the original manufacturer or authorized distributors?
All SG2524BDW-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 SG2524BDW-TR meets industry standards.
7.What is the process for return or replacement of SG2524BDW-TR?
All SG2524BDW-TR units undergo pre-shipment inspection (PSI). If there is an issue with SG2524BDW-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 SG2524BDW-TR part is unused and in its original packaging.
Return procedure for SG2524BDW-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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