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STMicroelectronics SG3525AP013TR
- Part No.:
- SG3525AP013TR
- Manufacturer:
- STMicroelectronics
- Category:
- DC DC Switching Controllers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SG3525AP013TR.pdf
- Description:
- IC REG CTRLR BCK/PSH-PULL 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,518
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Product details
Overview
SG3525AP013TR from STMicroelectronics is a dual-output PWM controller IC designed for regulating switching power supplies, featuring an internal 5.1 V ±1% reference, oscillator frequency range of 100 Hz to 400 kHz, adjustable deadtime control via external resistor, and pulse-by-pulse shutdown capability. It operates from 8–35 V supply and delivers >200 mA source/sink per output in a 16-pin narrow SOIC package.
For engineers reviewing the SG3525AP013TR datasheet, SG3525AP013TR pinout, SG3525AP013TR application, or SG3525AP013TR equivalent, key selection criteria include its NOR-logic output stage (LOW = OFF), undervoltage lockout with 500 mV hysteresis, internal soft-start requiring only one external capacitor, and sync terminal for multi-unit synchronization in high-reliability DC-DC converters.
Technical Context
The SG3525AP013TR integrates a precision error amplifier with rail-to-rail common-mode input range including the 5.1 V reference, eliminating external bias resistors. Its oscillator uses external RT/CT/RD components to set frequency and deadtime independently, supporting stable operation across wide input voltage (8–35 V) and temperature (0–70 °C) ranges.
A latch follows the PWM comparator to prevent multiple pulses per cycle, resetting on each clock edge. The shutdown terminal (Pin 10) controls both PWM latch reset and soft-start capacitor discharge-enabling either instantaneous turn-off or controlled recycle based on signal duration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 8–35 V - supports wide-input industrial and automotive DC-DC designs without external regulators |
| Reference Voltage | 5.1 V ±1% - enables accurate feedback loop calibration without trimming resistors |
| Oscillator Range | 100 Hz–400 kHz - covers low-noise audio-grade SMPS up to high-frequency telecom converters |
| Output Drive | >200 mA sink/source - directly drives gate drivers or small MOSFETs without buffer stages |
| Deadtime Control | Adjustable via single resistor (0–500 Ω) - ensures safe commutation in half-bridge and push-pull topologies |
| UVLO Threshold | 6–8 V with ~500 mV hysteresis - prevents erratic startup/shutdown during brownout conditions |
| Soft-Start Current | 25–80 µA - sets ramp time with external capacitor for controlled inrush current limiting |
Pinout & Package
SG3525AP013TR is housed in a 16-pin narrow SOIC (SO16) package with 1.27 mm pitch, 9.8–10.0 mm body length, and 5.8–6.2 mm width. Thermal resistance junction-to-ambient is 50 °C/W (max).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (INV) | Inverting input of error amplifier | Connects to feedback network for closed-loop regulation |
| 2 (NINV) | Non-inverting input of error amplifier | Tied to internal 5.1 V reference for fixed-setpoint operation |
| 3 (COMP) | Error amplifier output / compensation node | External RC network sets loop stability and bandwidth |
| 4 (OSC) | Oscillator timing output | Drives external CT capacitor; frequency set by RT and RD |
| 5 (CT) | Oscillator timing capacitor connection | Charges/discharges to generate sawtooth waveform |
| 6 (RT) | Oscillator timing resistor connection | Sets charging current; determines base frequency |
| 7 (DISCH) | Oscillator discharge resistor connection | Controls discharge rate; adjusts deadtime independently |
| 8 (SS) | Soft-start capacitor terminal | Charged by internal 50 µA current source; ramps duty cycle |
| 9 (REF) | 5.1 V reference output | Provides precision bias for sensors, ADCs, or external circuits |
| 10 (SHDN) | Shutdown control input | Active-high: latches off outputs and discharges SS capacitor |
| 11 (OUT A) | Output A driver (NOR logic) | LOW = active; sinks/source >200 mA; complementary to OUT B |
| 12 (GND) | Power ground | Common return for all analog and power sections |
| 13 (VC) | Collector supply for output transistors | Accepts up to 35 V; decoupled externally for noise immunity |
| 14 (OUT B) | Output B driver (NOR logic) | LOW = active; phase-shifted 180° from OUT A for push-pull |
| 15 (Vi) | Main supply input | 8–35 V input powering internal logic and reference |
| 16 (SYNC) | Oscillator synchronization input | Accepts external clock or master unit's OSC signal for multi-phase sync |
Key Features
| Feature | Design Value |
|---|---|
| Internal 5.1 V ±1% reference | Eliminates need for external voltage reference IC or trim potentiometer in feedback path |
| Separate SYNC terminal | Enables precise phase alignment across multiple SG3525AP013TR units in interleaved converters |
| Pulse-by-pulse shutdown | Allows real-time overcurrent protection without disrupting soft-start sequence or oscillator timing |
| Undervoltage lockout with hysteresis | Prevents oscillation near threshold by holding outputs off until input rises ≥500 mV above trip point |
| Dual totem-pole outputs with NOR logic | Ensures mutually exclusive drive in push-pull configurations; simplifies gate driver interface design |
Applications
| Industrial AC-DC Power Supplies | Automotive DC-DC Converters |
|---|---|
Use Scenario: 24 V to 5 V/12 V isolated converter in PLC power modules with strict EMI limits. IC Role / Device Role / Timing Role: Primary-side PWM controller generating complementary gate signals with programmable deadtime. Use Value: Internal 5.1 V reference and UVLO hysteresis ensure reliable startup under battery-sag conditions; SO16 package supports compact layout. | Use Scenario: 12 V input boost converter supplying 48 V for ADAS camera systems. IC Role / Device Role / Timing Role: Regulating controller managing MOSFET switching at 200 kHz with synchronized soft-start. Use Value: Pulse-by-pulse shutdown responds within 0.5 µs to overcurrent events; 8–35 V operating range accommodates cold-crank transients. |
| Telecom Rectifier Modules | Renewable Energy Inverters |
Use Scenario: -48 V telecom rectifier with parallel N+1 redundancy and hot-swap capability. IC Role / Device Role / Timing Role: Master PWM generator with SYNC input slaved to system clock for phase interleaving. Use Value: Adjustable deadtime via RD resistor prevents shoot-through in high-current SiC MOSFET bridges; SO16 thermal resistance supports convection cooling. | Use Scenario: Off-grid solar charge controller using half-bridge topology to regulate battery charging voltage. IC Role / Device Role / Timing Role: Dual-output controller driving high-side/low-side gates with automatic reset during dead time. Use Value: Internal soft-start current (50 µA typ.) allows precise ramp control with 10 µF capacitor; 0–70 °C rating matches outdoor enclosure requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UC3525ADW | TI part; same pinout, 5.1 V ref ±2%, oscillator max 400 kHz, no internal sync pull-up | Requires external pull-up on SYNC pin; slightly looser ref tolerance affects precision feedback loops | Preferred where TI ecosystem compatibility or legacy design reuse is required |
| TL494CDR | Single-ended output architecture; fixed 2.5 V reference; no dedicated sync terminal; 1–300 kHz range | Lacks independent deadtime control and multi-unit synchronization capability | Suitable for cost-sensitive single-output flyback or forward converters without interleaving needs |
Compared with UC3525ADW and TL494CDR, the SG3525AP013TR offers tighter reference accuracy (±1%), integrated sync pull-up, and dedicated deadtime adjustment-making it optimal for high-efficiency, multi-phase, or safety-critical industrial power supplies where timing precision and reliability are prioritized.
Availability
SG3525AP013TR is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, automotive DC-DC converters, and telecom rectifier modules requiring stable component supply and long-term lifecycle support.
Supply support for SG3525AP013TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, microcontrollers, and analog ICs for industrial, automotive, and consumer markets.
The SG3525A series was developed to simplify high-performance switching power supply design by integrating precision references, synchronized oscillators, and robust output drivers into a single 16-pin package-targeting engineers building reliable, low-component-count DC-DC and AC-DC converters.
FAQ
What is the maximum allowable oscillator frequency for SG3525AP013TR?
The maximum oscillator frequency is 400 kHz, achieved with RT = 2 kΩ and CT = 470 pF under recommended operating conditions. This limit is specified in the Electrical Characteristics table and validated across temperature (0–70 °C) and supply voltage (8–35 V). Exceeding this frequency may degrade deadtime accuracy and output rise/fall times due to internal propagation delays.
Does SG3525AP013TR support synchronous rectification control?
No, SG3525AP013TR does not provide dedicated synchronous rectification control signals. Its dual NOR-logic outputs are intended for driving external gate drivers in hard-switched topologies like push-pull, half-bridge, or full-bridge. Synchronous rectification requires separate logic or dedicated controllers (e.g., STSR3) to manage low-side FET timing relative to primary-side switching.
How is the soft-start time determined for SG3525AP013TR?
Soft-start time is set by the external capacitor on Pin 8 (SS) and the internal 50 µA (typical) charging current. For example, a 10 µF capacitor yields ~200 ms ramp time (t = C × V / I = 10 µF × 5.1 V / 50 µA). The actual ramp voltage appears at Pin 3 (COMP), modulating PWM duty cycle linearly until the error amplifier reaches equilibrium.
Can SG3525AP013TR operate with a single 5 V supply?
No. The minimum recommended supply voltage is 8 V, as specified in Absolute Maximum Ratings and Recommended Operating Conditions. Below 8 V, internal reference regulation, oscillator startup, and output driver saturation cannot be guaranteed. Attempting operation at 5 V will result in undefined behavior, including failure to initiate soft-start or generate valid PWM outputs.
SG3525AP013TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Push-Pull
- Number of Outputs:
- 2
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 8V ~ 35V
- Frequency - Switching:
- 100Hz ~ 400kHz
- Duty Cycle (Max):
- 49%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Enable, Soft Start
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
SG3525AP013TR FAQ
1.How can I place an order for SG3525AP013TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SG3525AP013TR 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 SG3525AP013TR reliable?
The price and inventory of SG3525AP013TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SG3525AP013TR is usually 5 days.
3.What payment methods are accepted for SG3525AP013TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SG3525AP013TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SG3525AP013TR?
SG3525AP013TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SG3525AP013TR 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 SG3525AP013TR?
For technical support, including SG3525AP013TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SG3525AP013TR requirements.
6.How does Aetrix verify that SG3525AP013TR is sourced from the original manufacturer or authorized distributors?
All SG3525AP013TR 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 SG3525AP013TR meets industry standards.
7.What is the process for return or replacement of SG3525AP013TR?
All SG3525AP013TR units undergo pre-shipment inspection (PSI). If there is an issue with SG3525AP013TR, 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 SG3525AP013TR part is unused and in its original packaging.
Return procedure for SG3525AP013TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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