TPS62840QDLCRQ1 - 60nA IQ, 750mA Buck Converter | TI Automotive
MPN: TPS62840QDLCRQ1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.84 | $1,840.00 |
Drop-in alternatives for TPS62840QDLCRQ1 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:
TPS62840DLCR
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TPS62841DLCR
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TPS62843DLCR
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TPS62840QDLCRQ1 Maximum Ratings & Electrical Characteristics
| Topology | Step-Down (Buck) Switching Regulator |
| Input Voltage Range | 1.8 V to 6.5 V |
| Output Voltage | Adjustable |
| Maximum Output Current | 750 mA |
| Operating Quiescent Current | 60 nA (typical) |
| IQ in 100% Duty-Cycle Mode | 120 nA |
| Efficiency at 1 uA Load | 80% (3.6 VIN to 1.8 VOUT) |
| Switching Frequency | 1.8 MHz |
| Control Topology | DCS-Control (RF friendly) |
| Number of Outputs | 1 |
| Operating Temperature | -40C to +125C (TJ) |
| Qualification | AEC-Q100 (automotive Q1) |
| Package | 8-VFDFN (DLC) |
| Mounting Type | Surface Mount |
| Duty Cycle Mode | 100% duty-cycle mode supported |
| RoHS Status | Compliant |
TPS62840QDLCRQ1 Pin Configuration
| Pin 1 | SW β Switch node - connect to power inductor |
| Pin 2 | VOS β Output voltage sense feedback input |
| Pin 3 | GND β Ground |
| Pin 4 | EN β Enable input (high = device enabled) |
| Pin 5 | VSEL β Output voltage selection input |
| Pin 6 | MODE β Mode selection (efficiency vs. ripple control) |
| Pin 7 | L β Connection for optimized operation control |
| Pin 8 | VIN β Input supply, 1.8 V to 6.5 V |
| Pin 9 | PowerPAD β Thermal pad - connect to GND plane |
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
TPS62840QDLCRQ1 is suitable for 6 applications: Battery-Powered IoT Sensors, Automotive Always-On and Telematics Modules, Energy Harvesting Systems, Smart Meters and Battery-Backup Gauges, Ultra-Low-Power MCU and Sensor Rails, Portable Medical and Wearable Devices.
Battery-Powered IoT Sensors
The TPS62840QDLCRQ1 suits coin-cell and primary-battery IoT nodes because its 60 nA quiescent current is negligible against multi-year standby budgets, and 80% efficiency at a 1 uA load (3.6 V to 1.8 V) preserves energy even in deep-sleep duty cycling. During wireless MCU wake-up and transmit bursts, the 750 mA capability covers peak demand, while the DCS-Control topology limits output ripple that could disturb sensitive RF measurements.
Recommended
Automotive Always-On and Telematics Modules
With AEC-Q100 qualification and -40C to +125C operation, the TPS62840QDLCRQ1 powers always-on automotive rails such as telematics, tire-pressure monitoring receivers, and battery-backup ECU supplies. The 60 nA IQ minimizes key-off battery drain, a critical concern for 12 V vehicles parked for weeks. Its 6.5 V maximum input supports pre-regulated automotive rails, and the 1.8 MHz switching frequency keeps harmonics away from broadcast and telematics radio bands.
Recommended
Energy Harvesting Systems
Energy harvesting sources such as small photovoltaic cells and thermoelectric generators supply only microamps to milliwatts, so converter housekeeping current directly limits viable system size. The TPS62840QDLCRQ1's 60 nA IQ and 80% efficiency at 1 uA load allow harvesting even at very low light or temperature gradients. The 1.8 V minimum input and 100% duty-cycle mode (120 nA IQ) let designs extract usable energy as the storage capacitor discharges toward end of cycle.
Recommended
Smart Meters and Battery-Backup Gauges
Smart metering electronics must operate for a decade or more on primary batteries, making nanoamp standby conversion essential. The TPS62840QDLCRQ1's 60 nA IQ keeps quiescent losses far below the meter's sleep budget, while the 750 mA rating handles communication bursts (RF or PLC front ends) and display refreshes. The adjustable output supports 1.8 V to 3.3 V logic rails from a single lithium thionyl chloride cell across its full discharge curve.
Recommended
Ultra-Low-Power MCU and Sensor Rails
Modern nano-power microcontrollers sleep at sub-microamp levels, and a conventional buck with microamp IQ would double the system sleep current. The TPS62840QDLCRQ1 adds only 60 nA, keeping total sleep current dominated by the MCU itself. The 100% duty-cycle mode with 120 nA IQ maintains regulation as the battery discharges, and the DCS-Control topology provides fast transient response for wake-up events without large output capacitors.
Recommended
Portable Medical and Wearable Devices
Wearable health monitors and portable medical sensors run continuously for days on small cells, so converter efficiency at microamp loads determines battery runtime. The TPS62840QDLCRQ1's 60 nA IQ and 80% efficiency at 1 uA output extend operating life substantially versus standard bucks. The RF-friendly DCS-Control topology reduces switching artifacts that could couple into sensitive biopotential front ends such as ECG or bioimpedance measurement circuits.
Recommended
Recommended Products Summary
Engineering reference data for TPS62840QDLCRQ1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS62840DLCR | TPS62841DLCR | TPS62150A-Q1 |
|---|---|---|---|---|
| Package | 8-VFDFN (DLC) | 8-VFDFN (DLC) - same | 8-VFDFN (DLC) - same | VQFN-16 (RGY) - different |
| Brand | Texas Instruments | Texas Instruments | Analog Devices | STMicroelectronics |
| Input Voltage Range | 1.8 V to 6.5 V | 1.8 V to 6.5 V | 1.8 V to 6.5 V | 3 V to 17 V |
| Output Current | 750 mA | 750 mA | 750 mA | 3 A |
| Quiescent Current | 60 nA | 60 nA | 60 nA | [DATA_NEEDED] |
| Switching Frequency | 1.8 MHz | 1.8 MHz | 1.8 MHz | [DATA_NEEDED] |
| Automotive Grade (AEC-Q100) | Yes (Q1) | No (commercial) | No (commercial) | Yes (Q1) |
| Control Topology | DCS-Control (RF friendly) | DCS-Control | DCS-Control | [DATA_NEEDED] |
Key Differentiators
- 60 nA operating quiescent current (vs TPS62150A-Q1)
- 100% duty-cycle mode with 120 nA IQ (vs TPS62840DLCR)
- 80% efficiency at 1 uA load (vs TPS62150A-Q1)
Design Notes
At nanoamp standby currents, every leakage path matters. Use high-impedance feedback or the VSEL-based output selection rather than low-value resistor dividers, select low-leakage X5R/X7R ceramic capacitors, and verify upstream enable-divider currents are in the nanoamp range. A single 1 uA leakage path exceeds the converter's entire 60 nA IQ budget by 16x, defeating the design intent.
Place the input capacitor (typically 4.7 uF to 10 uF ceramic) as close as possible to VIN and GND, and route the SW node inductor loop short and tight to minimize parasitic inductance and EMI. Connect the PowerPAD directly to a solid ground plane with an array of thermal vias - this is both the thermal and the primary grounding return for the DCS-Control topology.
Do not exceed the 6.5 V absolute input rating; automotive load-dump transients require upstream protection (e.g., a series regulator or TVS) when connecting near an unregulated 12 V rail. Also confirm the selected inductor value and saturation current meet the datasheet recommendations for 750 mA peak operation - an undersized inductor that saturates during bursts degrades transient response and efficiency.
Compliance Information
Automotive Q1 product manufactured to AEC-Q100. RoHS and lead-free status per TI standard product page; REACH and halogen-free status not stated in provided data.
