TPS54308DDCR Texas Instruments Power Supply (SOT23 (6-Pin)) In Stock
TPS54308DDCR is a 3 A, 28 V input synchronous step-down DC-DC converter from Texas Instruments, using current-mode PWM control in a compact 6-pin SOT-23 package. It operates from 4.5 V to 28 V input and regulates outputs down to 0.6 V with high efficiency across the full load range. Available in stock worldwide for industrial, automotive, and portable power supply designs.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (6-Pin)
- Pin Count
- 6
- Lifecycle
- ACTIVE
- Datasheet
- TPS54308DDCR Datasheet PDF
- Category
- Power Supply
- Price
- From $0.3077(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 3 A continuous output current from a 4.5 V to 28 V input range in a tiny 6-pin SOT-23 footprint, enabling high-density power designs
- Current-mode PWM control with internal compensation simplifies external component selection and reduces design cycle time
- Integrated high-side and low-side MOSFETs eliminate external switching transistors, cutting BOM count and board area
Applications
TPS54308DDCR is designed for point-of-load DC-DC conversion in industrial control systems, telecom equipment, and embedded computing boards where a wide input voltage rail must be regulated down to 1.8 V, 3.3 V, or other logic supply levels. Its 28 V input tolerance makes it compatible with 24 V industrial bus rails and automotive 12 V or 24 V systems. The compact SOT-23 package suits space-constrained IoT gateways, motor drive auxiliary supplies, and wearable medical device power management circuits.
Specifications
| Pbfree Code | Yes |
| Date Of Intro | 2017-06-21 |
| YTEOL | 15 |
| Analog IC - Other Type | SWITCHING REGULATOR |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 28V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G6 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Output Current-Max | 3A |
| Output Voltage-Max | 26V |
| Output Voltage-Min | 1V |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 350kHz |
| Technology | BICMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| ## TPS54308DDCR Alternates Showing results | Image |
| Package | SOT23 (6-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TPS54308DDCR:
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Frequently Asked Questions
What is the maximum output current of TPS54308DDCR and how does it compare to similar converters in the SOT-23 package?
The TPS54308DDCR delivers up to 3 A continuous output current, which is among the highest ratings available in the 6-pin SOT-23 package class for step-down converters. By integrating both high-side and low-side MOSFETs with optimized RDS(on) values, it achieves efficiencies above 90% at typical load conditions. Competing 1 A or 2 A SOT-23 converters require external MOSFETs or a larger package to reach comparable output power levels.
Which input voltage range does TPS54308DDCR support and what supply rails is it compatible with?
The TPS54308DDCR accepts input voltages from 4.5 V to 28 V, covering 5 V USB power, 12 V ATX rails, and 24 V industrial bus standards with a single part. The 28 V maximum rating also accommodates automotive 12 V and 24 V battery systems including load dump transients within that range. The adjustable output voltage can be set as low as 0.6 V by choosing the appropriate feedback resistor divider values.
How does current-mode PWM control in TPS54308DDCR simplify PCB design compared to voltage-mode converters?
Current-mode control senses the inductor current each switching cycle, providing inherent cycle-by-cycle current limiting and first-order power stage response that simplifies compensation network design. The TPS54308DDCR includes internal slope compensation, so engineers only need to set two resistors for the output voltage rather than designing a full Type-III compensator. This reduces loop stability design effort by approximately 50% and allows the use of ceramic output capacitors as small as 22 µF without instability.
What switching frequency does TPS54308DDCR operate at and how does that affect inductor and capacitor selection?
The TPS54308DDCR operates at a fixed 570 kHz switching frequency, which allows the use of small inductors in the 2.2 µH to 10 µH range and ceramic output capacitors of 22 µF to 100 µF. Higher switching frequency reduces energy storage requirements, enabling a total solution footprint that fits within 100 mm² on the PCB. At 570 kHz, the converter also keeps switching noise above the AM radio band, simplifying EMI filter design for automotive and industrial applications.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.0500 | $2.05 |
| 3+ | $1.6400 | $4.92 |
| 13+ | $1.2300 | $15.99 |
| 250+ | $0.7904 | $197.61 |
| 500+ | $0.7595 | $379.76 |
| 650+ | $0.3077 | $200.00 |
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