SRK1001TR STMicroelectronics Integrated Circuit (Small Outline Packages) In Stock
The SRK1001TR is an adaptive synchronous rectification controller from STMicroelectronics designed to drive the secondary-side synchronous rectifier MOSFET in flyback converters. It operates from 3.7 V to 32 V input, detects secondary conduction intervals, and improves converter efficiency by replacing Schottky diodes with low-resistance MOSFETs in power supplies up to 1 A output.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- END OF LIFE
- Datasheet
- SRK1001TR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.1500(MOQ 100)
- Temp Range
- -40.0°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SRK1001TR?
- Adaptive secondary-side synchronous rectification for flyback converters, replacing Schottky diodes to reduce losses
- Wide operating input range from 3.7 V to 32 V for compatibility with 5 V, 12 V, and 24 V bus designs
- 1 A gate drive output current for fast switching of synchronous rectifier MOSFETs
- 8-pin SOIC package with JESD-609 e3 lead-free green qualification for RoHS compliance
- Automatic drain voltage sensing adapts gate timing to load and line variation without external tuning
What is SRK1001TR used for?
The SRK1001TR is used on the secondary side of isolated flyback power supplies in USB chargers, AC/DC adapters, and SMPS modules where efficiency improvement is critical and a Schottky rectifier diode is being replaced by a synchronous rectifier MOSFET. Industrial power supplies for 24 V fieldbus nodes and embedded computing systems also benefit from its adaptive timing, which minimizes body-diode conduction time and reduces heat generation. Its 3.7 V to 32 V operating range makes it versatile across both 5 V and 12 V output flyback topologies.
What are the specifications of SRK1001TR?
| Factory Lead Time | 16Weeks |
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Input Voltage-Max | 32V |
| Input Voltage-Min | 3.7V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Current-Max | 1A |
| Output Voltage-Min | 2V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.24 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK-BOOST |
| Switching Frequency-Max | 300kHz |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mainland China |
Where can I find the SRK1001TR datasheet?
SRK1001TR Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for SRK1001TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the SRK1001TR improve flyback converter efficiency compared to a Schottky diode rectifier?
A Schottky diode has a forward voltage drop of approximately 0.3 V to 0.5 V, causing significant conduction loss at high output currents. The SRK1001TR drives a synchronous rectifier MOSFET with low on-resistance, potentially reducing the effective drop to below 0.1 V at 1 A, which cuts secondary-side conduction losses and improves overall converter efficiency by several percentage points.
What input voltage range does the SRK1001TR support, and does it fit a 12 V output flyback design?
The SRK1001TR operates from 3.7 V to 32 V supply, which covers the 12 V output rail of a typical flyback converter directly. The nominal 12 V operating point is well within the device's range, and the 32 V maximum accommodates load-transient overshoot and startup conditions without requiring a separate bias supply.
What gate drive current can the SRK1001TR deliver to the synchronous rectifier MOSFET, and how does that affect switching speed?
The SRK1001TR provides up to 1 A peak gate drive current. A higher gate drive current reduces the MOSFET gate charge time, enabling faster turn-on and turn-off transitions. For a MOSFET with 20 nC gate charge, 1 A of drive delivers the charge in approximately 20 ns, which is adequate for flyback converters operating up to several hundred kilohertz.
What is the expected lead time for the SRK1001TR, and should designers plan buffer stock?
The SRK1001TR carries a factory lead time of 16 weeks according to component database records. This is longer than typical commodity semiconductors and reflects specialized controller availability. Designers planning production builds should carry safety stock or place blanket orders with authorized distributors to avoid supply disruptions, especially for high-volume programs.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 100+ | $1.1500 | $115.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
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