TPS62740DSSR - 300mA 360nA Iq Buck Converter | Texas Instruments
MPN: TPS62740DSSR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.9 | $1.90 |
| 10 | $1.71 | $17.10 |
| 100 | $1.44 | $144.00 |
| 500 | $1.22 | $610.00 |
| 1,000 | $1.05 | $1,050.00 |
Drop-in alternatives for TPS62740DSSR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TPS62742DSSR
β Drop-Inπ Reference alternative (not in catalog)
TPS62745DSSR
β Drop-Inπ Reference alternative (not in catalog)
TPS62746DSSR
β Drop-Inπ Reference alternative (not in catalog)
TPS62751DSSR
β‘ Same Packageπ Reference alternative (not in catalog)
TPS62740DSSR Maximum Ratings & Electrical Characteristics
| Topology | Step-down (Buck) DC-DC Converter, DCS-Control |
| Input Voltage Range | 2.2 V to 5.5 V |
| Maximum Output Current | 300 mA (TPS62740) |
| Quiescent Current | 360 nA (typical) |
| Efficiency | Up to 90% at 10 uA output current |
| Switching Frequency | Up to 2 MHz |
| Integrated Load Switch | Yes |
| Recommended Inductor | 2.2 uH |
| Recommended Output Capacitor | 10 uF |
| Total Solution Size | Approximately 31 mm2 |
| Operating Temperature | -40C to +85C |
| Package | 12-WSON (DSS), 2x3 mm, exposed pad |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Application Segment | Bluetooth Low Energy (BLE) power supply |
| RoHS Status | Compliant |
TPS62740DSSR Pin Configuration
| Pin 1 | SW β Switch node - connect to 2.2uH inductor |
| Pin 2 | SW β Switch node - connect to 2.2uH inductor |
| Pin 3 | VOS β Output voltage sense feedback |
| Pin 4 | VSS β Ground |
| Pin 5 | GND β Ground (exposed pad also grounds) |
| Pin 6 | L β Load switch control input |
| Pin 7 | VSTORE β Load switch output / storage capacitor |
| Pin 8 | NC β No connect |
| Pin 9 | VIN β Input supply 2.2V to 5.5V |
| Pin 10 | VIN β Input supply |
| Pin 11 | EN β Converter enable (active high) |
| Pin 12 | NC β No connect |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
TPS62740DSSR is suitable for 6 applications: Bluetooth Low Energy Beacons and Sensors, Wearable Devices, Energy Harvesting Systems, Wireless Sensor Networks and IoT Nodes, Battery-Powered Metering, Portable Medical and Health Monitors.
Bluetooth Low Energy Beacons and Sensors
The TPS62740DSSR is explicitly positioned by TI as a BLE power supply. BLE nodes spend 99% of their life in sleep drawing microamps, where the 360nA quiescent current and 90% efficiency at 10uA loads preserve battery capacity. During transmit bursts, the 300mA rating covers radio PA peak demand. The RF-friendly DCS-Control topology keeps output ripple low, protecting receiver sensitivity and phase noise. Placed between the coin cell or primary battery and the SoC supply pin with a 2.2uH inductor and 10uF output capacitor, it delivers a ~31mm2 total solution.
Recommended
Wearable Devices
Wearables demand tiny, efficient power conversion from single-cell lithium (3.0-4.2V) sources. The TPS62740DSSR's 2x3mm WSON package and 2.2uH/10uF externals fit dense PCBs in watches, bands, and medical patches. Its integrated load switch lets the MCU disconnect peripheral rails, cutting standby drain to nanoamp levels. Efficiency of 90% at 10uA keeps always-on heart-rate or motion sensing viable for multi-day battery life, while the 300mA capability handles wireless charging telemetry and radio bursts.
Recommended
Energy Harvesting Systems
Energy harvesting sources (small PV cells, TEGs) deliver only microamps, so converter overhead dominates the energy budget. The TPS62740DSSR's 360nA Iq and 90% efficiency at 10uA output minimize this overhead, while the 2.2V minimum input accepts low-voltage harvester storage. DCS-Control remains stable from discontinuous microamp loads up to 300mA bursts, allowing a harvested system to sleep, accumulate energy, and transmit periodically without a separate burst regulator.
Recommended
Wireless Sensor Networks and IoT Nodes
Industrial IoT sensor nodes powered by 3.6V lithium thionyl chloride or 2x alkaline cells benefit from the TPS62740DSSR's 2.2V-5.5V input range and nanoamp quiescent current, enabling 5-10 year battery targets. The integrated load switch power-gates sensors and radios between reporting intervals. Its 2MHz switching keeps the inductor small for form-factor-constrained nodes, and the DCS-Control ripple behavior avoids corrupting sub-GHz radio and LoRa receiver performance.
Recommended
Battery-Powered Metering
Smart water, gas, and heat meters require decade-scale battery life with periodic 300mA-class radio transmissions. The TPS62740DSSR converts the primary cell efficiently at both sleep (360nA Iq) and burst loads, while its load switch isolates the MCU from leakage paths. The -40C to +85C operating range covers outdoor enclosures, and the WSON exposed-pad package aids thermal and ground integrity on two-layer meter PCBs.
Recommended
Portable Medical and Health Monitors
Battery-operated diagnostic patches and glucose monitors need clean, efficient rails for analog front ends and radios. The TPS62740DSSR's low output ripple in power-save mode reduces noise on sensitive biosignal amplifiers, while nanoamp Iq maximizes runtime of non-rechargeable cells. The compact 12-WSON footprint fits adhesive-body-worn form factors, and the integrated load switch supports safe power sequencing of sensor and BLE subsystems.
Recommended
Recommended Products Summary
Engineering reference data for TPS62740DSSR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS62742DSSR | TPS62745DSSR | TPS62746DSSR |
|---|---|---|---|---|
| Package | 12-WSON (DSS) 2x3 mm | 12-WSON (DSS) 2x3 mm - same | 12-WSON (DSS) 2x3 mm - same | 12-WSON (DSS) 2x3 mm - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Max Output Current | 300 mA | 400 mA | 300 mA | 300 mA |
| Input Voltage Range | 2.2 V to 5.5 V | 2.2 V to 5.5 V | 2.2 V to 5.5 V | 2.2 V to 5.5 V |
| Quiescent Current | 360 nA typ | 360 nA typ | 360 nA typ | 360 nA typ |
| Output Type | Fixed (TPS62740 variant setting) | Fixed (variant setting) | Fixed | Fixed |
| Integrated Load Switch | Yes | Yes | Yes | Yes |
| Efficiency at 10 uA | Up to 90% | Up to 90% | Up to 90% | Up to 90% |
Key Differentiators
- Industry-leading 360nA quiescent current (vs TPS62200DBVR)
- Integrated load switch for power gating (vs TPS62200DBVR)
- 90% efficiency at 10uA loads (vs TPS62742DSSR)
Design Notes
Place the 2.2uH inductor and 10uF output capacitor within 2mm of the SW and VOS pins. Use the WSON exposed pad as the primary ground connection - solder it to a minimum 4x4mm ground pour with at least 6 thermal vias. The DCS-Control topology senses output ripple at VOS, so route this trace directly to the output capacitor, not to a power plane, to avoid stability issues.
Do not substitute larger inductance values for the recommended 2.2uH; oversizing degrades the power-save-mode transient and increases output ripple. Keep the input voltage at or below 5.5V at all times including transients - for 6V rails, select a different family (e.g., TPS62840) since the TPS62740 is not rated for it. When using the integrated load switch, ensure the VSTORE capacitor is present to handle inrush of downstream loads.
For maximum battery life, verify sleep-state load is above roughly 1uA where efficiency remains high; below that, Iq dominates. The 360nA quiescent current means a 100uA average system load loses only ~0.4% to quiescent drain. Layout the BLE PA supply path with low-impedance copper so 300mA bursts do not droop the input below the 2.2V UVLO during transmit.
Compliance Information
RoHS compliant and lead-free per TI product information. REACH and halogen-free status not stated in retrieved data - verify on TI.com quality pages.
