My Inquiry
My Account
Texas Instruments TPS62244QDDCRQ1
- Part No.:
- TPS62244QDDCRQ1
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
TPS62244QDDCRQ1.pdf
- Description:
- IC REG BUCK 1.25V 300MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS62244QDDCRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified synchronous step-down DC/DC converter delivering up to 300 mA output current with fixed 1.25 V output voltage, operating from 2.0 V to 6.0 V input, and featuring 2.25 MHz fixed-frequency PWM mode with automatic PFM transition at light loads. It targets battery-powered automotive modules such as RKE fobs and PEPS base stations.
For engineers reviewing the TPS62244QDDCRQ1 datasheet, TPS62244QDDCRQ1 pinout, TPS62244QDDCRQ1 application, or TPS62244QDDCRQ1 equivalent, key selection criteria include its 15 µA quiescent current in PFM mode, ±1.5% output voltage accuracy in PWM mode, 100% duty-cycle low-dropout capability, TSOT-23-5 package footprint, and thermal shutdown at 140°C.
Technical Context
The TPS62244QDDCRQ1 implements a voltage-mode control architecture with input voltage feed-forward for fast line/load regulation and stable operation with small ceramic capacitors. Its dual-mode operation-PWM at moderate-to-heavy loads and automatic transition to PFM at light loads-maintains high efficiency across 0.01 mA to 300 mA output range.
Internally, it integrates high-side and low-side MOSFETs with typical RDS(on) of 240 mΩ (high-side) and 180 mΩ (low-side), current-limit protection (0.54–0.95 A), undervoltage lockout (1.85 V falling threshold), and soft-start (250 µs VOUT ramp time). The FB pin is internally connected to the output in fixed-voltage variants, eliminating external resistor dividers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.25 V ±1.5% in PWM mode - ensures stable core logic supply for automotive microcontrollers and sensors. |
| Max Output Current | 300 mA at VIN ≥ 2.3 V - supports power rails for RF transceivers and low-power MCUs in compact RKE/PEPS modules. |
| Input Voltage Range | 2.0 V to 6.0 V - compatible with Li-MnO₂ coin cells (2.0–3.6 V), 2S/3S alkaline, and 3.3 V/5 V system rails. |
| Switching Frequency | 2.25 MHz fixed in PWM mode - enables use of tiny 2.2 µH inductors and 10 µF ceramic output capacitors for minimal PCB area. |
| Quiescent Current | 15 µA typical in PFM mode - extends battery life in always-on automotive key fobs and sensor nodes. |
| Shutdown Current | <1 µA - reduces standby drain during vehicle sleep mode; EN pin controls full system power sequencing. |
| Thermal Shutdown | 140°C junction temperature with 20°C hysteresis - protects against sustained overload or poor heatsinking in sealed enclosures. |
Pinout & Package
TPS62244QDDCRQ1 is housed in a TSOT-23-5 (DDC) package measuring 2.90 mm × 1.60 mm, optimized for space-constrained automotive modules. Thermal resistance is RθJA = 193.7°C/W, requiring minimal copper pour for Grade 1 (–40°C to 125°C) operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 2.0–6.0 V supply; must be decoupled with ≥4.7 µF X5R ceramic capacitor near the pin. |
| GND (Pin 2) | Power ground | Primary return path for high-frequency switching current; requires low-inductance connection to power plane. |
| EN (Pin 3) | Enable control | Active-high logic input; pulling low disables regulator and reduces current draw to <1 µA; supports power sequencing. |
| FB (Pin 4) | Feedback reference | Internally tied to output in fixed-1.25 V version; no external divider required - simplifies layout and improves accuracy. |
| SW (Pin 5) | Switch node | Connects to inductor; carries high di/dt switching current - requires short, wide trace and tight loop with GND and CIN. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C junction operation - suitable for under-hood and cabin-mounted automotive electronics. |
| 100% duty-cycle low-dropout mode | Enables regulation down to VIN ≈ VOUT + IOUT×(RDS(on)+RL) - maximizes usable battery voltage in coin-cell applications. |
| PFM/PWM automatic transition | Maintains ≥75% efficiency from 0.01 mA to 300 mA - eliminates manual mode selection and ensures optimal light-load performance. |
| Integrated MOSFETs with current limit | High-side RDS(on) = 240 mΩ (typ), low-side = 180 mΩ (typ); ILIMF = 0.54–0.95 A - provides robust short-circuit protection without external sensing. |
| Fast soft-start | 250 µs VOUT ramp time (5% to 95%) - limits inrush current and prevents input rail collapse during cold start in battery systems. |
Applications
| Remote Keyless Entry (RKE) Fob | Passive Entry Passive Start (PEPS) Base Station |
|---|---|
Use Scenario: Compact handheld key fob powered by CR2032 coin cell, transmitting encrypted RF signals on demand or via motion wake-up. IC Role / Device Role / Timing Role: Primary 1.25 V power supply for ultra-low-power MCU and sub-GHz transceiver; regulates down from 2.0–3.3 V battery voltage. Use Value: 15 µA quiescent current extends shelf life beyond 10 years; 2.25 MHz switching allows 2.2 µH inductor and 10 µF output cap in <3 mm² solution size. |
Use Scenario: Vehicle-mounted PEPS antenna module continuously monitoring for key presence using low-duty-cycle LF wakeup and UHF response. IC Role / Device Role / Timing Role: Always-on 1.25 V rail for LF receiver ASIC and real-time clock; operates across 2.0–6.0 V input from vehicle battery or backup capacitor. Use Value: 100% duty-cycle mode sustains regulation down to ~1.35 V input, enabling >95% battery utilization; AEC-Q100 Grade 1 ensures reliability over 15-year vehicle lifetime. |
| ADAS Front Camera Power Rail | Automotive Cabin Sensor Node |
Use Scenario: Small-form-factor front-facing camera module in driver monitoring or lane departure warning systems. IC Role / Device Role / Timing Role: Secondary 1.25 V supply for image signal processor (ISP) I/O or auxiliary logic, derived from 3.3 V or 5 V domain. Use Value: 2.25 MHz fixed frequency avoids AM band interference; ±1.5% output accuracy meets ISP core voltage tolerance; TSOT-23-5 eases placement near sensor die. |
Use Scenario: Occupancy or air quality sensor node mounted in headliner or pillar, powered from 12 V via pre-regulator. IC Role / Device Role / Timing Role: Final-stage 1.25 V regulator for MEMS sensor interface and BLE SoC, handling dynamic load steps from 10 µA to 150 mA. Use Value: Fast PFM-to-PWM transition (<10 µs) suppresses output droop during BLE transmit bursts; thermal shutdown protects against enclosure overheating in confined spaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62243QDDCRQ1 | Fixed 1.80 V output; identical pinout, specs, and package - differs only in output voltage setting. | Used where 1.8 V I/O or core voltage is required (e.g., certain MCUs or sensors), not 1.25 V logic rails. | Select when system requires 1.8 V instead of 1.25 V; no layout change needed - direct voltage variant swap. |
| TPS62840DLCR | Lower IQ (300 nA vs 15 µA), 1.8 V to 6.0 V input, 1.2 V to 5.0 V adjustable output; WSON-12 package (2.0 × 2.0 mm). | Targets ultra-long-life applications (e.g., tire pressure monitors); requires external feedback resistors and larger board area. | Choose for multi-year battery life in infrequent-wake applications; not drop-in due to different package, pin count, and adjustability. |
Compared with TPS62244QDDCRQ1, TPS62243QDDCRQ1 offers identical functionality at 1.8 V output - ideal for voltage variant substitution - while TPS62840DLCR delivers nanoscale quiescent current at the cost of larger footprint and design complexity, making it suitable only for extreme low-power niches.
Availability
TPS62244QDDCRQ1 is available at Aetrix Electronics and suitable for Remote Keyless Entry (RKE), Passive Entry Passive Start (PEPS), and ADAS front camera applications requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.
Supply support for TPS62244QDDCRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive-grade power management ICs, with decades of automotive qualification expertise and broad manufacturing scale.
The TPS6224x-Q1 product line delivers high-efficiency, small-footprint DC/DC converters specifically engineered for battery-powered automotive modules including key fobs, PEPS systems, and ADAS sensors - prioritizing ultra-low IQ, AEC-Q100 reliability, and minimal solution size.
FAQ
What is the guaranteed output voltage accuracy of the TPS62244QDDCRQ1 in PWM mode?
The TPS62244QDDCRQ1 guarantees ±1.5% output voltage accuracy in PWM mode across temperature and line conditions. This specification applies at TJ = –40°C to 125°C, VIN = 3.6 V, and is confirmed in Section 7.5 of the SLVSEK3 datasheet. The fixed 1.25 V output is trimmed at wafer test, and the internal feedback network eliminates external resistor errors that could degrade accuracy in adjustable regulators.
Does the TPS62244QDDCRQ1 require external feedback resistors?
No, the TPS62244QDDCRQ1 does not require external feedback resistors. As a fixed-output-voltage device (1.25 V), its internal resistor divider is permanently connected to the FB pin, which is internally routed to the output node. Per Pin Functions table (Section 6), FB must be connected directly to the output capacitor - no external components are needed, reducing BOM count and layout complexity.
What is the minimum input voltage at which the TPS62244QDDCRQ1 maintains regulation under 300 mA load?
Under 300 mA load, the TPS62244QDDCRQ1 maintains regulation down to approximately VIN ≈ 1.25 V + 0.3 A × (0.48 Ω + 0.11 Ω) = ~1.42 V, based on max RDS(on) (480 mΩ high-side) and typical LPS3015 inductor DCR (110 mΩ). However, per Recommended Operating Conditions (Section 7.3), minimum functional VIN is specified as 2.0 V - below this, UVLO disables operation. The 100% duty-cycle mode extends usable battery range but does not override UVLO.
Can the TPS62244QDDCRQ1 be used with a 1.0 µH inductor?
No, the TPS62244QDDCRQ1 is not characterized or recommended for use with a 1.0 µH inductor. Section 9.2.2.1 specifies a validated inductor range of 1.5 µH to 4.7 µH, with 2.2 µH as the optimized value. Using 1.0 µH falls below the 1.0 µH effective inductance lower limit stated for stable operation and risks increased ripple, reduced efficiency, potential instability, and failure to meet EMI or transient response specifications.
How does the TPS62244QDDCRQ1 handle thermal overload?
The TPS62244QDDCRQ1 activates thermal shutdown when junction temperature exceeds 140°C (typical), turning off both high-side and low-side MOSFETs. Operation resumes only after temperature falls below 120°C (140°C – 20°C hysteresis), as defined in Section 7.5. This protection is independent of load current or input voltage and is implemented in silicon - no external circuitry is required to safeguard the TPS62244QDDCRQ1 or downstream circuitry during sustained overload or poor thermal design.
TPS62244QDDCRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- -
- Current - Output:
- 300mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS62244QDDCRQ1 FAQ
1.How can I place an order for TPS62244QDDCRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62244QDDCRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS62244QDDCRQ1 reliable?
The price and inventory of TPS62244QDDCRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62244QDDCRQ1 is usually 5 days.
3.What payment methods are accepted for TPS62244QDDCRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62244QDDCRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62244QDDCRQ1?
TPS62244QDDCRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62244QDDCRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS62244QDDCRQ1?
For technical support, including TPS62244QDDCRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62244QDDCRQ1 requirements.
6.How does Aetrix verify that TPS62244QDDCRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS62244QDDCRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS62244QDDCRQ1 meets industry standards.
7.What is the process for return or replacement of TPS62244QDDCRQ1?
All TPS62244QDDCRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS62244QDDCRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS62244QDDCRQ1 part is unused and in its original packaging.
Return procedure for TPS62244QDDCRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS62244QDDCRQ1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
