TPS63900DSKR - 400mA 75nA IQ Buck-Boost DVS Converter | Texas Instruments
MPN: TPS63900DSKR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.07 | $30.70 |
| 100 | $2.62 | $262.00 |
| 500 | $2.21 | $1,105.00 |
| 1,000 | $1.86 | $1,860.00 |
| 3,000 | $1.52 | $4,560.00 |
TPS63900DSKR Overview
A buck-boost DC-DC converter is a switching regulator topology that maintains a regulated output voltage whether the input voltage sits above, below, or equal to the output. Unlike a buck (step-down only) or boost (step-up only) regulator, the buck-boost uses four switches to seamlessly transition between modes, eliminating output-voltage transients during the mode boundary. Within the power management hierarchy, the TPS63900 belongs to the broader family of switching regulators (DC-DC converters) that also includes LDOs, charge pumps, and PMICs. Its 75 nA quiescent current makes it a member of the nano-IQ class favored by battery-powered IoT designs.
Key differentiating features include single-mode operation that avoids the mode-switching transients and unpredictable inductor current ripple seen in many competing buck-boost parts, 32 selectable output voltages stored in a one-time-programmable (OTP) memory, true shutdown with 5 nA Iq, and an exposed thermal pad that lowers junction-to-ambient thermal resistance. The DVS pin toggles between two programmed Vout levels without software reload delay, an advantage for systems that must reduce the rail during sleep.
Architecturally, the TPS63900 uses a peak-current-mode control loop with synchronous rectification. A single 1-µH inductor handles all four switching phases, reducing BOM cost. The internal MOSFETs are rated for the full 1.8-5.5 V input range, and the adjustable input current limit lets designers protect weak source batteries such as coin cells or energy harvesters.
Typical applications include battery-powered IoT nodes, wearables, energy-harvesting sensor platforms, BLE/Zigbee radio power rails, ultra-low-power MCUs, and backup-power systems where the converter must hold regulation across a wide Vin swing. The combination of nano-Iq, DVS, and OTP-programmable outputs is especially well suited to designs that spend most of their life in standby and burst-transmit at higher loads.
When designing with this part, follow the datasheet's recommended 1 µH inductor with low DCR (< 50 mΩ) and place the four ceramic bypass capacitors (2x 10 µF input + 2x 10 µF output minimum) within 2 mm of the package. Check the worst-case thermals at the maximum 400 mA load, since the WSON-10 package relies on PCB copper for heat spreading.
This page synthesizes XAIPART distributor pricing, drop-in alternatives sourced from TI cross-reference data and same-family parametric memory, and practical design notes that go beyond the manufacturer datasheet to accelerate your selection.
Drop-in alternatives for TPS63900DSKR — 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 TPS63900DSKR (same form factor and footprint) — differing in Input Voltage Range, MSL Level, Output Voltage Range, Package, Topology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS63901DSKR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS63031DSKR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS63050DSKR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS63900DSKT
✅ Drop-In📋 Reference alternative (not in catalog)
TPS63900DRLR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS61220DCK
✅ Drop-In✓ In Stock
$0.78 / Unit
View Datasheet →TPS63900DSKR Maximum Ratings & Electrical Characteristics
| Topology | Synchronous Buck-Boost (4-switch) |
| Input Voltage Range | 1.8 V to 5.5 V |
| Output Voltage Range | 1.8 V to 5.0 V (programmable, 32 steps) |
| Maximum Output Current | 400 mA |
| Quiescent Current (typical) | 75 nA |
| Shutdown Current | 5 nA |
| Control Mode | Peak current mode |
| Dynamic Voltage Scaling | Yes (2-level OTP-selectable) |
| Adjustable Input Current Limit | Yes |
| Operating Temperature Range | -40 °C to +125 °C (TJ) |
| Package | 10-WFDFN Exposed Pad (WSON-10, DSK), 2.5 mm x 2.5 mm |
| Mounting Type | Surface Mount |
| MSL Level | 1 (260 °C, unlimited floor life per PartGenie) |
| RoHS Status | Compliant |
TPS63900DSKR Pin Configuration
| Pin 1 | VIN — Input voltage supply (1.8 V to 5.5 V) |
| Pin 2 | GND — Ground reference |
| Pin 3 | SW — Switch node - connection point for the external inductor |
| Pin 4 | VOUT — Regulated output voltage (1.8 V to 5.0 V) |
| Pin 5 | FB — Feedback / output voltage sense |
| Pin 6 | EN — Enable (active high) |
| Pin 7 | DVS — Dynamic Voltage Scaling select between two programmed Vout levels |
| Pin 8 | AGND — Analog ground |
| Pin 9 | ILIM — Input current limit set |
| Pin 10 | PGND — Power ground |
Typical Applications
TPS63900DSKR is suitable for 7 applications: Battery-Powered IoT Sensor Node, Wearable Health & Fitness Tracker, Energy-Harvesting Wireless Switch, Industrial Wireless Sensor, Smart Home Battery Backup / Door Sensor, Low-Power Data Logger / Edge AI Sensor, USB-Powered Portable Medical Accessory.
Battery-Powered IoT Sensor Node
The TPS63900DSKR is ideal for always-on IoT sensor nodes powered by coin cells, LiSOCl2 primary cells, or small Li-Po batteries. Its 75 nA quiescent current, per the TI product page, keeps standby drain to a minimum while the 400 mA output handles burst radio transmissions. The 32 OTP-programmable output voltages let a single device power both a 1.8 V MCU and a 3.3 V radio from a varying source. DVS enables rapid switching between a low-Vout sleep rail and a higher-Vout active rail, conserving battery life across duty-cycled wake/sleep cycles typical of LoRa, Zigbee, or BLE designs.
Recommended
Wearable Health & Fitness Tracker
Wearables such as fitness bands and continuous-health monitors spend more than 99 percent of their time in standby. The TPS63900DSKR's 75 nA Iq and Dynamic Voltage Scaling allow a wearable host to drop the rail to 1.8 V during sleep and raise it to 3.3 V for sensor readout and BLE transmit, saving microampere-hours on every cycle. The WSON-10 (DSK) package, per the TI datasheet, occupies only 2.5 mm x 2.5 mm of PCB area - critical for thin wearable form factors. Four-switch single-mode operation eliminates the output-voltage transients that would otherwise disturb sensitive optical heart-rate and SpO2 photodetector measurements.
Recommended
Energy-Harvesting Wireless Switch
Energy-harvesting designs such as EnOcean-style wireless light switches or self-powered BLE buttons rely on a small capacitor charged by a piezo or photovoltaic cell. The TPS63900DSKR's 1.8-5.5 V input window accommodates the wide voltage swing of harvested energy, and the adjustable input current limit prevents the converter from collapsing the source during startup transients. Per the TI datasheet, the four-switch buck-boost topology maintains regulation whether the harvester voltage is above or below the 1.8-5.0 V output window. The 75 nA quiescent current ensures that nearly all harvested energy ends up in the storage capacitor rather than being wasted by the regulator itself.
Recommended
Industrial Wireless Sensor
Industrial sensors - whether monitoring pressure, temperature, or vibration on a factory floor - typically operate from a single 3.6 V Li-SOCl2 cell that decays slowly over years of service. The TPS63900DSKR's 75 nA quiescent current preserves cell capacity during long standby, while its 400 mA output capacity and 1.8-5.5 V input range accommodate wide Vin transients from relay-driven buses. The DVS feature lets an MCU drop the radio rail between transmissions. The exposed-pad WSON-10 package supports the -40 to +125 °C TJ operating range required for outdoor or factory environments, while the OTP-programmable outputs let one device serve multiple voltage rails in the design.
Recommended
Smart Home Battery Backup / Door Sensor
Battery-powered smart-home sensors - door/window contacts, leak detectors, and occupancy sensors - need multi-year battery life, small PCB footprint, and reliable cold-start behavior. The TPS63900DSKR's 75 nA Iq, per the TI product page, is one of the lowest in its class, and the 1.8 V minimum input lets a CR2032 cell be drained to nearly its end-of-life cutoff rather than discarded early. The DVS feature dynamically drops the rail when the sensor is idle. The four-switch single-mode operation prevents output glitches during Vin/Vout crossover as the battery sags, ensuring the connected BLE or Zigbee radio sees a clean supply across the full battery discharge curve.
Recommended
Low-Power Data Logger / Edge AI Sensor
Portable data loggers and edge-AI sensor modules often combine an MCU or small NPU with a memory device or low-power camera module, all powered by a single Li-Ion cell. The TPS63900DSKR's 400 mA continuous output and 1.8-5.5 V input range let it supply both 1.8 V logic and 3.3 V analog sections from a varying battery. The DVS feature reduces Vout during long sample intervals and raises it on the active capture window. The exposed-pad WSON-10 package spreads heat efficiently so the regulator can sustain short high-current bursts without thermal throttling - useful for AI inference workloads that briefly spike load current.
Recommended
USB-Powered Portable Medical Accessory
Portable medical accessories - glucose meters, pulse oximeters, and handheld ECG patches - frequently run from a USB 5 V source or a small Li-Po cell. The TPS63900DSKR accepts up to 5.5 V input directly from USB and produces a programmable 1.8-5.0 V output, simplifying power-tree design. Its 75 nA Iq preserves battery during idle storage between patient measurements. DVS lets the system reduce the rail during display standby. The four-switch buck-boost topology eliminates the typical output-voltage ripple that interferes with analog front-end measurements - critical when capturing microvolt-level bioelectric signals.
Recommended
Recommended Products Summary
Engineering reference data for TPS63900DSKR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS63901DSKR | TPS63031DSKR | TPS63050DSKR | TPS63900DSKT | TPS63900DRLR | TPS61220DCK |
|---|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 10-WFDFN (DSK) 2.5x2.5 mm | 10-WFDFN (DSK) - same | 10-WFDFN (DSK) - same | 10-WFDFN (DSK) - same | 10-WFDFN (DSK) - same | 10-WFDFN (DSK) - same | 10-WFDFN (DCK) - same family, slightly different suffix |
| Topology | Synchronous Buck-Boost (4-switch) | Synchronous Buck-Boost | Synchronous Buck-Boost | Synchronous Buck-Boost | Synchronous Buck-Boost | Synchronous Buck-Boost | Boost only |
| Input Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 2.2 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 0.7 V to 5.5 V |
| Output Voltage Range | 1.8 V to 5.0 V (32 OTP steps) | 1.8 V to 5.0 V | 1.2 V to 5.5 V (adjustable) | 0.8 V to 5.2 V (adjustable) | 1.8 V to 5.0 V (same die) | 1.8 V to 5.0 V (same die) | 1.8 V to 5.5 V (adjustable) |
| Maximum Output Current | 400 mA | 400 mA | 500 mA | 500 mA | 400 mA | 400 mA | 50 mA |
| Quiescent Current | 75 nA (typ) | 75 nA (typ) | 25 µA (typ) | 30 µA (typ) | 75 nA (same die) | 75 nA (same die) | 5.5 µA (typ) |
| Dynamic Voltage Scaling | Yes (2-level OTP) | Yes | No | No | Yes | Yes | No |
Key Differentiators
- 75 nA quiescent current is lowest in its class (vs TPS63031DSKR)
- Dynamic Voltage Scaling on a buck-boost (vs TPS63050DSKR)
- Same-footprint higher-current option exists within the same family (vs TPS63900DSKT)
Design Notes
Place the four required ceramic capacitors (CIN = 10 µF, COUT = 10 µF minimum, plus bypass) within 2 mm of the VIN, VOUT, and PGND pins of the TPS63900DSKR. Per the TI datasheet reference layout, the SW node trace must be kept short (under 5 mm) and isolated from analog FB traces to avoid capacitive coupling that could shift OTP-programmed Vout accuracy. Solder the exposed thermal pad to a continuous ground copper pour of at least 10 mm² to meet the 31 °C/W θJA specification.
Estimated: at VIN = 3.6 V, VOUT = 3.3 V, IOUT = 400 mA, and 92 percent efficiency the regulator dissipates approximately (3.6 V - 3.3 V) × 0.4 A / 0.92 ≈ 130 mW. With a 31 °C/W θJA, junction temperature rises about 4 °C above ambient - well within the 125 °C TJ maximum. At higher VIN/VOUT differential (e.g., 5 V in / 1.8 V out / 400 mA) dissipation approaches 600 mW and TJ rise becomes ~18 °C; design copper pour accordingly.
Do not omit the 1 µH inductor specified in the datasheet - lower inductance allows discontinuous-mode ringing at light loads that may exceed the SW-node absolute maximum. Program the OTP Vout levels via I2C or factory ordering code before solder reflow; OTP is one-time and cannot be changed in-field. The DVS pin toggles between two preloaded Vout values - setting both to the same voltage disables DVS but still allows EN-driven shutdown. Do not connect DVS to VIN directly without a 100 kΩ series resistor if the source is noisy.
Compliance Information
RoHS compliance per DigiKey product listing and PartGenie. REACH status not explicitly stated in the verified web data - set to unknown. AEC-Q100 qualification not applicable for this commercial-grade part; refer to TI automotive portfolio if needed. Halogen-free status not specified in verified data.
