TPS62840DLCR - 60nA IQ 750mA Buck Converter 1.8-6.5V | TI
Teilenummer: TPS62840DLCR ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $2.14 | $2,14 |
| 10 | $1.93 | $19,30 |
| 100 | $1.72 | $172,00 |
| 500 | $1.55 | $775,00 |
| 1.000 | $1.38 | $1.380,00 |
| 3.000 | $1.21 | $3.630,00 |
TPS62840DLCR Übersicht
A buck converter (also called step-down converter) is a switching-mode DC-DC regulator that converts a higher input voltage to a lower output voltage by rapidly switching an inductor and rectifying the stored energy. Within the broader taxonomy, a buck converter sits as a sub-type of DC-DC converter, which belongs to the family of voltage regulators, which itself is a category of power management integrated circuits (ICs). Buck converters are the dominant topology for battery-powered electronics because they achieve efficiencies of 80-95%, far higher than the linear regulators (LDOs) they often replace.
Key features include the 120 nA IQ achieved in 100% duty-cycle mode for end-of-discharge battery operation, DCS-Control topology that combines voltage-mode and current-mode control for clean RF powering, a STOP pin that disables switching during noise-sensitive measurements, and Power Save Mode that reduces switching frequency at light load to maintain efficiency. The 1.8 MHz switching frequency allows small external inductors and ceramic-only capacitors, enabling a complete sub-1 cm-squared solution footprint. The output voltage is adjustable via an external resistor divider.
Technically, the TPS62840 integrates high-side and low-side MOSFETs, a precision reference, and a programmable soft-start. Integrated protection features include overcurrent protection, thermal shutdown, and undervoltage lockout. The wide 1.8 V to 6.5 V input range supports 2S-4S alkaline (2-6 V), 1S-2S Li-MnO2 (3-6 V), 1S Li-Ion/Li-Polymer (2.7-4.2 V), and energy harvester outputs up to 6.5 V. The combination of low IQ and high peak-load capability makes the device especially well suited to IoT duty-cycled loads where sleep currents dominate the energy budget.
Typical applications include battery-powered IoT sensors, wearables and wireless earbuds, smart utility meters, energy-harvesting sensor nodes, and standby rails for microcontrollers. It is also used to power RF transceivers (BLE, LoRa, sub-GHz) in wireless sensor nodes and as an auxiliary rail in portable medical and industrial monitor designs.
Design tip: place 10 uF input and 22 uF output ceramic capacitors within 2 mm of the IC, choose a 1.8 MHz-rated inductor in the 1-2.2 uH range, and use the STOP pin in test and measurement setups to eliminate switching ripple during ADC acquisition windows.
This page synthesizes distributor stock, pricing tiers, drop-in alternatives, and practical design notes that complement the TI datasheet and help engineers select and qualify the TPS62840DLCR for always-on battery applications.
Drop-in-Alternativen für TPS62840DLCR – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit TPS62840DLCR (gleiche Bauform und Footprint) – abweichend in Package, Output Voltage Range, Switching Frequency, Input Voltage Range, Maximum Output Current.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
TPS62842DGR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TPS62840DLCT
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TPS62840YBGR
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
TPS62822DLCR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TPS62826ADMQR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MAX17222ELT+
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
TPS62840DLCR Grenzwerte & elektrische Eigenschaften
| Topologie | Synchronous Step-Down (Buck) Converter |
| Eingangsspannungsbereich | 1.8 V to 6.5 V |
| Ausgangsspannungsbereich | Adjustable (0.8 V to V_IN) |
| Maximaler Ausgangsstrom | 750 mA |
| Typical Quiescent Current | 60 nA |
| Quiescent Current (100% Mode) | 120 nA |
| Nominal Switching Frequency | 1.8 MHz |
| Control Topology | DCS-Control (voltage-mode + current-mode) |
| Efficiency at 1 uA Load (3.6 VIN to 1.8 VOUT) | 80% |
| STOP Pin | Yes (disables switching) |
| Sanftanlauf | Programmable via SS pin capacitor |
| Betriebs-Sperrschichttemperatur | -40C to +125C |
| Gehäuse | 8-pin VFDFN (DLC), 3.0 x 3.0 mm |
| Montageart | Surface Mount |
| RoHS-Status | Compliant |
TPS62840DLCR Pin-Konfiguration
| Pin 1 | PGND — Power ground (return for high-side and low-side MOSFETs) |
| Pin 2 | SW — Switch node - connect to inductor |
| Pin 3 | SW — Switch node - connect to inductor |
| Pin 4 | VIN — Input supply voltage (1.8 V to 6.5 V) |
| Pin 5 | EN — Enable pin (active high) |
| Pin 6 | FB — Feedback voltage (connect to external resistor divider) |
| Pin 7 | SS/TR — Soft-start / tracking input |
| Pin 8 | STOP — STOP pin (high disables switching immediately) |
| Pin 9 | PGND (DAP) — Power ground - exposed Die Attach Pad, must be soldered to PCB ground |
Typische Anwendungen
TPS62840DLCR ist geeignet für 6 Anwendungs: Battery-Powered IoT Sensor Nodes, Wearable Devices and Wireless Earbuds, Smart Utility Meters and Energy Harvesting, RF Transceiver Power (BLE / LoRa / Sub-GHz), Portable Medical and Patient Monitors, Industrial IoT and Process Sensor Nodes.
Battery-Powered IoT Sensor Nodes
The TPS62840DLCR's 60 nA IQ and 120 nA 100%-mode IQ are the lowest in its 750 mA output class, making it the default choice for BLE and LoRa sensor nodes that spend 99%+ of their lifecycle in standby. The 1.8-6.5 V input range supports direct connection to 2x-4x alkaline, 1S Li-Ion, or 2S Li-MnO2 cells without pre-regulation. In a typical BLE beacon node, the TPS62840DLCR delivers 1.8 V to the system-on-chip from a CR2032 coin cell, extending useful battery life by 2-4x versus LDO solutions because the converter's switching efficiency (80%+ at 1 uA load) avoids the IQ-tax of linear regulators. The 750 mA peak also supports brief transmit bursts that exceed average standby load by 1000x.
Empfohlen
Wearable Devices and Wireless Earbuds
The TPS62840DLCR's 3.0 x 3.0 mm VFDFN-8 package enables sub-15 mm-squared solution size, critical for in-ear and wrist-worn wearables. The STOP pin disables switching during noise-sensitive tasks (touch sensing, ADC acquisition), enabling deterministic EMI behavior. A typical wearable design uses two TPS62840DLCR converters: one to power the audio DSP at 1.0 V and another for the BLE radio at 1.8 V. The 1.8 MHz switching frequency places harmonics outside the 2.4 GHz BLE band, eliminating spurious emissions that would otherwise require filtering. The 750 mA peak also drives rapid charging of a small backup supercapacitor without an LDO's thermal penalty.
Empfohlen
Smart Utility Meters and Energy Harvesting
Battery life targets of 10-20 years in wireless meter modules are met only by sub-100 nA IQ converters, making the TPS62840DLCR a standard part for smart water, gas, and heat meters. Energy-harvesting microsources (thermoelectric, photovoltaic, piezoelectric) typically output 0.1-6.5 V and are buffered by a 1S Li-MnO2 cell; the TPS62840DLCR's 1.8 V minimum VIN is met after the harvester primes the cell voltage. Per the TI datasheet, efficiency at 1 uA load (3.6 VIN to 1.8 VOUT) is 80%, which directly translates to longer battery service intervals and reduced truck-roll replacement costs for utility operators.
Empfohlen
RF Transceiver Power (BLE / LoRa / Sub-GHz)
The DCS-Control topology is specifically engineered to cleanly power RF transceivers by combining voltage-mode and current-mode control, yielding fast transient response during transmit bursts without spurious output ripple. In a typical LoRaWAN end-device, the TPS62840DLCR supplies 3.3 V to the SX1276 from a 2x AA battery at 80%+ efficiency, with 750 mA peak capacity sufficient for +20 dBm transmit bursts. The STOP pin is used by the host MCU during receive windows to eliminate switching noise that could desensitize the receiver by several dB; this is a documented design tip from TI's wireless sensor network reference designs.
Empfohlen
Portable Medical and Patient Monitors
Battery-powered patient monitors (pulse oximeters, glucose meters, infusion pumps) require both long battery life and clean power for ADC and analog front-end subsystems. The TPS62840DLCR's 60 nA IQ keeps standby drain negligible between measurements, while 750 mA peak capacity supports backlight illumination and wireless telemetry. The VFDFN-8 package enables miniaturization critical for wearable continuous monitors. The STOP pin allows the host MCU to gate all switching activity during ADC acquisition windows, eliminating power-rail noise that could otherwise couple into sensitive bio-signal measurement channels.
Empfohlen
Industrial IoT and Process Sensor Nodes
Industrial sensor nodes in plant monitoring, predictive maintenance, and remote asset tracking operate from 24V industrial bus rails that must be conditioned before reaching low-power MCUs. The TPS62840DLCR's 6.5 V maximum input supports a front-end buck that drops 24V to 5V (using an external upstream regulator), with the TPS62840 providing the final 3.3V or 1.8V rail at 60 nA IQ. The -40C to +125C junction temperature rating qualifies it for outdoor and factory-floor environments. The 750 mA peak also drives RS-485 transceivers during burst communication, while the 60 nA standby keeps battery-backed nodes operational for 5+ years.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für TPS62840DLCR – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | TPS62842DGR | TPS62840DLCT | TPS62822DLCR | MAX17222ELT+ |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices / Maxim Integrated |
| Package | VFDFN-8 (DLC), 3.0 x 3.0 mm | VFDFN-8 (DGR) | VFDFN-8 (DLC) | VFDFN-8 (DLC) | 6-pin uDFN |
| Input Voltage Range | 1.8 V to 6.5 V | 1.8 V to 6.5 V | 1.8 V to 6.5 V | 2.7 V to 6 V | 1.8 V to 5.5 V |
| Maximum Output Current | 750 mA | 750 mA | 750 mA | 2 A | 1.2 A |
| Typical Quiescent Current | 60 nA | 60 nA | 60 nA | 5 uA | 5 uA |
| STOP Pin | Yes | No | Yes | No | No |
| Output Voltage Adjustment | External resistor divider | External resistor divider | External resistor divider | External resistor divider | Fixed or external |
Wichtigste Unterscheidungsmerkmale
- Lowest IQ in the 750 mA buck converter class (vs. MAX17222)
- STOP pin eliminates switching noise during measurements (vs. TPS62822DLCR)
- 100% mode for end-of-discharge battery operation (vs. TPS62826ADMQR)
Designhinweise
Estimated: at VIN=5 V, VOUT=1.8 V, and peak ILOAD=750 mA during a BLE transmit burst, the TPS62840DLCR dissipates (5-1.8) * 0.75 = 2.4 W peak. Continuous duty-cycled loads should keep average dissipation below approximately 1.0 W to maintain junction temperature below 100C in a non-fanned, non-heatsunk enclosure. The 3.0 x 3.0 mm VFDFN package has limited thermal dissipation; ensure the PCB DAP (pin 9) is soldered to a continuous ground copper pour of at least 1 cm-squared.
Place the 10 uF VIN and 22 uF VOUT ceramic capacitors within 2 mm of the IC pins (per datasheet layout recommendation). Route SW traces on a single layer with minimum area to reduce EMI; do not route analog signal traces near the SW node. The FB trace (pin 6) should be a Kelvin connection directly to the top of the output capacitor, not the load, to avoid injecting IR-drop ripple into the feedback loop.
The TPS62840's STOP pin is a unique feature that completely disables switching and drives the SW node high-impedance within 1 us, allowing the host MCU to gate all switching noise during noise-sensitive ADC acquisition windows or during RF receive. This is documented in TI reference designs as the preferred method to eliminate spurious converter noise from the measurement path without using a separate LDO.
Estimated: at a 1 uA average load (typical duty-cycled IoT use case), the TPS62840 achieves 80% efficiency (per datasheet, 3.6 VIN to 1.8 VOUT). A competing LDO in the same conditions would deliver 50% efficiency, translating to 60% less battery current drain and approximately 2-3x longer coin-cell life. Calculate your specific battery-life multiplier by comparing converter IQ plus switch-loss versus LDO IQ plus dropout-loss at your average load.
Compliance-Informationen
Per TI's product page and reel packaging, the TPS62840DLCR is RoHS and REACH compliant. Not AEC-Q100 qualified - for automotive applications use TPS62840-Q1 suffix parts.
