VIPER318LDTR STMicroelectronics Integrated Circuit (Small Outline Packages) In Stock
VIPER318LDTR is an offline switching regulator from STMicroelectronics supporting Boost, Buck, Buck-Boost, and Flyback topologies with 4.5 V to 30 V input range at 132 kHz PWM frequency in a 16-pin SO package. Current-mode control ensures fast transient response. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- VIPER318LDTR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.5924(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 VIPER318LDTR?
- Multi-topology support (Boost, Buck, Buck-Boost, Flyback) in a single 16-pin SO package for versatile offline power supply designs
- Current-mode PWM control at 132 kHz enables fast transient response and simplified compensation network design
- Wide 4.5 V to 30 V input range accommodates diverse AC-DC adapter and industrial offline power supply inputs
What is VIPER318LDTR used for?
The VIPER318LDTR is used in offline AC-DC power supply designs for consumer electronics, industrial equipment, and home appliances where compact, cost-efficient switching regulation is required across multiple output topologies. Its Flyback and Buck-Boost support make it ideal for isolated auxiliary power rails in motor drives, SMPS adaptors, and smart-meter power stages operating from rectified AC mains inputs. Current-mode PWM at 132 kHz allows designers to optimize transformer size and EMI filter components for a wide range of output power levels in 16-SO package.
What are the specifications of VIPER318LDTR?
| Factory Lead Time | 18Weeks |
| YTEOL | 7 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 30V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 9V |
| JESD-30 Code | R-PDSO-G16 |
| Number of Functions | 1 |
| Output Voltage-Nom | 15V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Supply Current-Max (Isup) | 2mA |
| Surface Mount | YES |
| Switcher Configuration | BUCK-BOOST |
| Switching Frequency-Max | 66kHz |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Thailand |
Where can I find the VIPER318LDTR datasheet?
VIPER318LDTR Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for VIPER318LDTR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What switching topologies does VIPER318LDTR support and at what PWM frequency does it operate?
VIPER318LDTR supports Boost, Buck, Buck-Boost, and Flyback switching topologies, operating at a fixed 132 kHz PWM switching frequency. Current-mode control provides inherent cycle-by-cycle current limiting and simplifies loop compensation design, making the device suitable for isolated and non-isolated offline converter designs ranging from a few watts to tens of watts in industrial and consumer applications.
What is the input voltage range of VIPER318LDTR and how does it suit industrial offline power supply designs?
VIPER318LDTR accepts input voltages from 4.5 V to 30 V, covering rectified low-voltage AC rails common in offline auxiliary power supply stages. In industrial equipment operating from 12 V or 24 V DC bus sources, the device's 30 V maximum input with 9 V nominal operating point allows direct connection after a bridge rectifier and bulk capacitor, reducing the need for a pre-regulator stage and simplifying the overall converter BOM.
For a Flyback converter in a smart meter design, why is VIPER318LDTR an efficient single-chip solution?
VIPER318LDTR integrates the PWM controller and gate driver in a single 16-pin SO package, eliminating the separate gate driver IC and discrete protection circuitry typically needed for Flyback topologies. At 132 kHz, the primary-side transformer can be wound on a small EE or EF ferrite core, reducing magnetic component cost by 20 to 30% compared to 65 kHz designs while still meeting CISPR 22 Class B EMI limits with proper filtering.
How does VIPER318LDTR's current-mode control benefit transient response in a Buck-Boost LED driver application?
Current-mode control in VIPER318LDTR samples inductor current every switching cycle at 132 kHz, inherently limiting peak current to a programmed threshold within 7.6 µs (one switching period). For Buck-Boost LED driver applications, this fast current limiting ensures output LED current remains stable within ±5% during input voltage transients from 4.5 V to 30 V, without requiring a fast outer voltage loop compensator for tight current regulation.
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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+ | $2.1102 | $211.02 |
| 250+ | $1.9990 | $499.76 |
| 500+ | $1.9700 | $985.00 |
| 2500+ | $1.8188 | $4546.90 |
| 5000+ | $1.7837 | $8918.45 |
| 10000+ | $1.5923 | $15923.50 |
In Stock · 24h Response · Worldwide Shipping
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