UC3842D
Texas Instruments
12V ~ 28VTube0°C~70°C(TA)
Ref. price$0.9325
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Unitrode UC38 Series
26 variants · Unitrode
About the Unitrode Unitrode UC38 Series series
The Unitrode Unitrode UC38 Series series groups 26 related part numbers, each listed with full specifications, a datasheet where available, and an RFQ option. The listed variants share a common clock sync of No, control features of Frequency Control and frequency of Up to 500kHz. Variants differ by case, duty cycle and function, so you can match the exact case your application requires using the selection guide below. The range mixes active and legacy part numbers, so you can source both current Unitrode UC38 Series variants and discontinued ones from a single page.
Select a variant by
- Case
- 8-SOIC (0.154\", 3.90mm Width) · 14-SOIC (0.154\", 3.90mm Width) · 14-SOIC (0.209\", 5.30mm Width) · 16-SOIC (0.295\", 7.50mm Width) · 20-LCC (J-Lead)
- Duty cycle
- 96% · 97%
- Function
- Step-Up, Step-Down, Step-Up/Step-Down · Step-Up, Step-Up/Step-Down
- Operating temperature
- 0°C ~ 70°C (TA) · 0°C~70°C(TA)
- Package
- Bulk · Tube
- Topology
- Boost, Buck, Buck-Boost, Flyback, Forward · Boost, Buck, Flyback, Forward · Boost, Flyback
- Voltage - supply (Vcc (Vdd))
- 7.6V ~ 30V · 10V ~ 30V · 12V ~ 28V
Variant comparison
| Parameter | UC3842D | UC3842D8 | UC3843D | UC3842ADWG4 | UC3842Q |
|---|---|---|---|---|---|
| Case | 14-SOIC (0.154\", 3.90mm Width) | 8-SOIC (0.154\", 3.90mm Width) | 14-SOIC (0.209\", 5.30mm Width) | 16-SOIC (0.295\", 7.50mm Width) | 20-LCC (J-Lead) |
| Duty cycle | 97% | 97% | 97% | 96% | 97% |
| Function | Step-Up, Step-Down, Step-Up/Step-Down | Step-Up, Step-Down, Step-Up/Step-Down | Step-Up, Step-Up/Step-Down | Step-Up, Step-Down, Step-Up/Step-Down | Step-Up, Step-Down, Step-Up/Step-Down |
| Operating temperature | 0°C~70°C(TA) | 0°C~70°C(TA) | 0°C ~ 70°C (TA) | 0°C~70°C(TA) | 0°C~70°C(TA) |
| Package | Tube | Tube | Tube | Bulk | Bulk |
| Topology | Boost, Buck, Buck-Boost, Flyback, Forward | Boost, Buck, Buck-Boost, Flyback, Forward | Boost, Flyback | Boost, Buck, Flyback, Forward | Boost, Buck, Buck-Boost, Flyback, Forward |
| Voltage - supply (Vcc (Vdd)) | 12V ~ 28V | 12V ~ 28V | 7.6V ~ 30V | 10V ~ 30V | — |
Shared specifications
- Clock sync
- No
- Control features
- Frequency Control
- Frequency
- Up to 500kHz
- Interface
- -
- Mounting type
- Surface Mount
- Number of outputs
- 1
- Output configuration
- Positive, Isolation Capable
- Output phases
- 1
- Output type
- Transistor Driver
- Synchronous rectifier
- No
Request a quote on any Unitrode UC38 Series part number and we confirm price, availability and lead time per line — including end-of-life and allocation-constrained variants.
Frequently asked questions
- How do the Unitrode Unitrode UC38 Series variants differ?
- Unitrode UC38 Series part numbers differ by case, duty cycle, function and operating temperature. Use the selection guide above to pick by case.
- How many Unitrode Unitrode UC38 Series part numbers are listed?
- 26 Unitrode Unitrode UC38 Series part numbers are listed, each with specifications and a datasheet where available.
- How do I get pricing and lead time for Unitrode Unitrode UC38 Series?
- Request a quote (RFQ) for any Unitrode UC38 Series part number and we confirm price, availability and lead time per line — including end-of-life and hard-to-find variants.
