TPS82085SILR - 3A Step-Down Converter Module | Texas Instruments
MPN: TPS82085SILR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.14 | $8.14 |
| 10 | $7.32 | $73.20 |
| 100 | $6.51 | $651.00 |
| 500 | $5.7 | $2,850.00 |
| 1,000 | $5.08 | $5,080.00 |
TPS82085SILR Overview
A step-down converter module, also known as a buck converter module, is a power management IC that efficiently converts a higher input voltage to a lower output voltage. It integrates the switching regulator, inductor, and often compensation components into a single package, reducing PCB area and design complexity. This module is part of the broader category of DC-DC converters, which are essential in power management systems for converting and regulating voltages in electronic devices.
Key features of the TPS82085SILR include a high efficiency of up to 95%, a switching frequency of 2.8MHz, and integrated soft-start to reduce inrush current. It also features enable (EN) and power-good (PG) pins for flexible power sequencing, over-temperature protection, and hiccup short-circuit protection. The MicroSiP package measures only 3.5mm x 3.5mm, enabling compact designs for space-constrained applications.
The module uses a synchronous buck topology with integrated MOSFETs and a fixed-frequency PWM control. The integrated inductor is optimized for efficiency and low profile, and the module is designed for automated assembly with standard surface-mount equipment. The high switching frequency allows the use of small external capacitors, further reducing solution size.
Typical applications include point-of-load regulation for FPGAs, DSPs, and ASICs, as well as power supplies for portable devices, industrial equipment, and networking hardware. The wide input range and adjustable output make it versatile for various voltage rails.
When designing with the TPS82085SILR, ensure proper input and output capacitor selection as per the datasheet recommendations. The EN pin can be used for sequencing, and the PG pin provides a status signal for monitoring. Thermal performance is enhanced by the exposed pad, which should be connected to a large copper area for heat dissipation.
Drop-in alternatives for TPS82085SILR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TPS82085SILR (same form factor and footprint) — differing in Input Voltage Range, Package, Switching Frequency, Output Current, Output Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS82085SILT
✅ Drop-In📋 Reference alternative (not in catalog)
TPS82084SILR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS82084SILT
✅ Drop-In📋 Reference alternative (not in catalog)
TPS826711
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.3 / Unit
View Datasheet →TPSM82822A
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.19 / Unit
View Datasheet →TPS82085SILR Maximum Ratings & Electrical Characteristics
| Output Type | Adjustable |
| Output Voltage Range | 0.8 V to 6 V |
| Maximum Output Current | 3 A |
| Input Voltage Range | 2.5 V to 6 V |
| Switching Frequency | 2.8 MHz |
| Efficiency | Up to 95% |
| Package | 8-uSiP (3.5 mm x 3.5 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C to +125°C |
| Enable Pin | Yes |
| Power Good Pin | Yes |
| Soft-Start | Integrated |
| Protection Features | Over-temperature, Hiccup short-circuit |
| RoHS Status | Compliant |
| REACH Status | Compliant |
TPS82085SILR Pin Configuration
| Pin 1 | VIN — Input voltage supply |
| Pin 2 | GND — Ground |
| Pin 3 | EN — Enable pin (active high) |
| Pin 4 | PG — Power good indicator (open-drain) |
| Pin 5 | FB — Feedback pin for output voltage setting |
| Pin 6 | VOUT — Regulated output voltage |
| Pin 7 | VOUT — Regulated output voltage |
| Pin 8 | GND — Ground |
Typical Applications
TPS82085SILR is suitable for 6 applications: FPGA Power Supply, DSP Power Supply, Portable Device Power, Industrial Equipment, Networking Hardware, ASIC Power Supply.
FPGA Power Supply
The TPS82085SILR provides a compact, high-efficiency solution for powering FPGAs. With 3A output current and adjustable voltage from 0.8V to 6V, it can supply core and I/O rails. The integrated inductor reduces board space, and the high switching frequency allows small external capacitors. The enable and power-good pins facilitate sequencing, essential for FPGA power-up requirements. Its 95% efficiency minimizes heat, making it suitable for dense designs.
Recommended
DSP Power Supply
The TPS82085SILR is ideal for powering DSPs that require clean, stable voltage rails. Its low output voltage ripple and high PSRR ensure minimal noise interference with sensitive analog circuits. The module's small footprint is beneficial in space-constrained designs. With integrated protection features, it enhances system reliability. The adjustable output allows tailoring to specific DSP core voltages, and the high efficiency reduces thermal stress.
Recommended
Portable Device Power
For portable devices, the TPS82085SILR offers high efficiency to extend battery life. Its small package and integrated inductor save PCB area, enabling slim designs. The wide input range supports various battery voltages. The enable pin allows power gating to reduce standby current. With up to 95% efficiency, it minimizes power loss, making it ideal for battery-powered applications.
Recommended
Industrial Equipment
The TPS82085SILR is suitable for industrial equipment requiring reliable power conversion. Its operating temperature range of -40°C to +125°C ensures performance in harsh environments. The integrated protection features, including over-temperature and short-circuit, enhance system robustness. The module's high efficiency reduces heat generation, important in sealed enclosures. Its small size allows for compact control boards.
Recommended
Networking Hardware
In networking hardware, the TPS82085SILR provides efficient power conversion for processors and switches. Its high switching frequency reduces the size of external components, saving board space. The power-good pin enables monitoring and sequencing in multi-rail systems. With 3A output, it can power multiple loads. The module's reliability and wide temperature range make it suitable for continuous operation.
Recommended
ASIC Power Supply
The TPS82085SILR is well-suited for powering ASICs that require precise voltage regulation. Its adjustable output and high accuracy ensure stable operation. The integrated inductor and MOSFETs simplify design and reduce component count. The enable and power-good pins allow flexible power sequencing, critical for ASIC startup. With high efficiency, it minimizes thermal issues in high-density designs.
Recommended
Recommended Products Summary
Engineering reference data for TPS82085SILR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS82085SILT | TPS82084SILR | TPS82084SILT | TPS826711 | TPSM82822A |
|---|---|---|---|---|---|---|
| Package | 8-uSiP | 8-uSiP | 8-uSiP | 8-uSiP | 8-uSiP | 8-uSiP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Current | 3 A | 3 A | 2 A | 2 A | 0.6 A | 2 A |
| Output Voltage Range | 0.8 V to 6 V | 0.8 V to 6 V | 0.8 V to 6 V | 0.8 V to 6 V | 1.2 V to 5.5 V | 0.6 V to 5.5 V |
| Switching Frequency | 2.8 MHz | 2.8 MHz | 2.8 MHz | 2.8 MHz | 2.8 MHz | 2.2 MHz |
| Efficiency | Up to 95% | Up to 95% | Up to 95% | Up to 95% | Up to 90% | Up to 95% |
| Enable Pin | Yes | Yes | Yes | Yes | Yes | Yes |
| Power Good Pin | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Higher output current (3A) compared to TPS82084SILR (2A) (vs TPS82084SILR)
- Integrated inductor simplifies design (vs TPSM82822A)
- Higher efficiency (up to 95%) (vs TPS826711)
Design Notes
Place input and output capacitors as close to the VIN and VOUT pins as possible. Use 10µF ceramic for input and 22µF for output as recommended. Ensure a solid ground plane under the module to minimize parasitic inductance and improve thermal performance.
The exposed pad on the bottom of the MicroSiP package must be soldered to a large copper area for heat dissipation. For high load currents, provide thermal vias to the ground plane. The junction-to-ambient thermal resistance is typically 40°C/W, so at 3A with 1V dropout, power dissipation is 3W, requiring adequate copper area.
Do not exceed the absolute maximum input voltage of 6V. Ensure the output capacitors have sufficient voltage rating and low ESR. The EN pin must not be left floating; tie it to VIN if not used. The PG pin is open-drain and requires a pull-up resistor to a voltage no higher than 6V.
Compliance Information
RoHS and REACH compliant per TI product page. Not AEC-Q100 qualified. Lead-free per TI's green packaging.
