My Inquiry
My Account
Texas Instruments REG71055IDDCRQ1
- Part No.:
- REG71055IDDCRQ1
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
REG71055IDDCRQ1.pdf
- Description:
- IC REG CHRG PUMP 5.5V 60MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,836
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
REG71055IDDCRQ1 from Texas Instruments is an automotive-grade, 30-mA, 5.5-V regulated switched-capacitor boost charge pump IC. It operates from 3.0 V to 5.5 V input, delivers 5.5 V ±0.3 V output with ≤35 mVPP ripple, features 1-MHz internal oscillator, shutdown mode (<1 µA quiescent current), and thermal/current protection - ideal for white LED backlighting in automotive instrument clusters.
For engineers reviewing the REG71055IDDCRQ1 datasheet, REG71055IDDCRQ1 pinout, REG71055IDDCRQ1 application, or REG71055IDDCRQ1 equivalent, key selection criteria include its TSOT-23-6 (DDC) package, no-inductor step-up capability, automotive temperature range (–40°C to 85°C), and compatibility with ceramic capacitors (CIN/COUT = 2.2 µF, CPUMP = 0.22 µF).
Technical Context
The REG71055IDDCRQ1 implements automatic mode switching between step-down (buck) and step-up (boost) operation depending on input voltage relative to output - maintaining regulation even when VIN drops below 5.5 V. Its internal 1-MHz oscillator enables use of small surface-mount capacitors without inductors.
It integrates four MOSFET switches (Q1–Q4), peak current limiting, thermal shutdown (160°C trip, 140°C recovery), and enable-controlled shutdown with <1 µA quiescent current. The device uses charge-pump topology with CPUMP capacitor charging/discharging phases to synthesize regulated 5.5-V output from low-voltage battery sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | 5.5 V ±0.3 V (regulated over 3.25–5.5 V input and 0–30 mA load) |
| Oscillator frequency | 1.0 MHz (enables use of 0.22 µF pump capacitor and eliminates inductor) |
| Max output current | 30 mA (supports driving multiple white LEDs in series) |
| Ripple voltage | ≤35 mVPP at 30 mA (ensures stable LED brightness without visible flicker) |
| Quiescent current | 65 µA typical (no load); <1 µA in shutdown (extends battery life in always-on systems) |
| Operating temp | –40°C to +85°C (AEC-Q100 qualified for automotive cabin applications) |
| Enable logic levels | VIH ≥1.3 V, VIL ≤0.4 V (compatible with 3.3-V and 5-V microcontroller GPIO) |
Pinout & Package
REG71055IDDCRQ1 is housed in a thermally enhanced TSOT-23-6 (DDC) package (2.9 mm × 1.6 mm × 1.1 mm max height), optimized for high-power-density automotive PCB layouts with exposed thermal pad connection recommended per TI layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply | Accepts 3.0–5.5 V battery input; connects to 2.2 µF input capacitor (CIN) for low-ripple operation |
| 2 - GND | Power ground | Common return path for input, output, and internal switches; requires low-impedance PCB plane connection |
| 3 - EN | Enable control | Active-high digital input; pulls low to enter <1 µA shutdown mode; must not float |
| 4 - CPUMP− | Charge pump negative terminal | Connects to 0.22 µF ceramic capacitor (CPUMP) negative side; forms flying capacitor node |
| 5 - CPUMP+ | Charge pump positive terminal | Connects to CPUMP positive side; alternately charges/discharges to generate boosted voltage |
| 6 - VOUT | Regulated output | Delivers 5.5 V ±0.3 V to load (e.g., LED string via current-limiting resistor); connects to 2.2 µF output capacitor (COUT) |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor boost conversion | Eliminates EMI-prone magnetics and reduces BOM count - only three external 0805/1206 ceramic capacitors required |
| Automotive qualification | AEC-Q100 Grade 2 qualified (–40°C to +105°C junction), with production test coverage per automotive reliability standards |
| Automatic mode switching | Seamlessly transitions between buck and boost modes as input voltage varies - maintains regulation across full Li-ion discharge curve (4.2 V → 3.0 V) |
| Low input current ripple | Peak input current limited internally - reduces stress on battery and input filtering requirements in space-constrained modules |
| Thermal & current protection | Shuts down at 160°C junction temperature and limits short-circuit current to ~100 mA - prevents damage during LED open/short faults |
Applications
| Automotive Instrument Cluster Backlighting | Infotainment Display LED Driver |
|---|---|
Use Scenario: Driving 3–5 white LEDs in series within a vehicle's digital gauge cluster powered by a 12-V system with local 3.3-V rail. IC Role / Device Role / Timing Role: Regulated 5.5-V charge pump supplying constant-current LED string via external resistor; replaces inefficient linear regulators. Use Value: Enables >90% efficiency at 10 mA output (vs. ~50% for LDO), reducing thermal load in sealed plastic housing and extending display lifetime. | Use Scenario: Powering edge-lit LCD backlight in center-stack infotainment unit using single-cell Li-ion (3.0–4.2 V) input. IC Role / Device Role / Timing Role: Step-up DC/DC converter generating stable 5.5 V from varying battery voltage; synchronized to MCU enable signal for dynamic dimming control. Use Value: Maintains consistent LED brightness across full battery discharge cycle without software compensation or additional sensing circuitry. |
| Automotive HVAC Control Panel | ADAS Camera Module Bias Supply |
Use Scenario: Illuminating membrane switch overlays and segmented LCDs in climate control panels where space and heat dissipation are constrained. IC Role / Device Role / Timing Role: Compact, low-noise 5.5-V source for LED indicators; enabled only during user interaction to minimize standby power. Use Value: Achieves <1 µA shutdown current - contributes <0.1 µA to total system sleep current, meeting OEM ultra-low-power requirements. | Use Scenario: Generating bias voltage for image sensor analog front-end in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Low-ripple 5.5-V supply for precision analog circuitry; immune to EMI from nearby motor drivers or CAN transceivers. Use Value: 35 mVPP output ripple ensures <0.1% gain error in sensor signal chain - avoids image noise or banding artifacts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS60403DBVR | Fixed 5-V output; 60-mA output; 1-MHz switching; same TSOT-23-6 package | Higher current but less precise output (5.0 V ±4% vs. 5.5 V ±5.5%); no automotive qualification | Use where higher drive current is needed and AEC-Q100 compliance is not required |
| MAX680ESA+ | 5-V output; ±1.5% accuracy; 100-mA output; SO-8 package; no shutdown pin | Larger footprint, no enable control, wider input range (1.5–6.5 V), non-automotive | Choose for industrial designs needing tighter output tolerance and higher current, accepting larger size and no shutdown |
Compared with TPS60403DBVR and MAX680ESA+, the REG71055IDDCRQ1 uniquely combines AEC-Q100 qualification, precise 5.5-V output, integrated enable, and minimal external components - making it the only drop-in solution for automotive LED backlighting where safety, size, and regulation stability are critical.
Availability
REG71055IDDCRQ1 is available at Aetrix Electronics and suitable for automotive instrument clusters, infotainment displays, HVAC control panels, and ADAS camera modules requiring stable component supply under AEC-Q100-compliant conditions.
Supply support for REG71055IDDCRQ1 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 delivering analog, embedded processing, and connectivity solutions for automotive, industrial, and personal electronics markets.
The REG71055-Q1 product line delivers AEC-Q100-qualified, inductorless DC/DC converters targeting space- and reliability-constrained automotive lighting and bias supply applications - designed specifically for LED backlighting and sensor power in harsh environments.
FAQ
What is the maximum continuous output current of the REG71055IDDCRQ1?
The REG71055IDDCRQ1 provides a nominal maximum continuous output current of 30 mA under specified conditions (TA = –40°C to +85°C, VIN ≥ 3.25 V). Short-circuit output current is rated at 100 mA, and thermal shutdown activates at ~160°C junction temperature to protect the device during overload. For sustained 30-mA operation, ensure adequate PCB copper area and airflow per TI's thermal design guidelines for the TSOT-23-6 (DDC) package.
Does the REG71055IDDCRQ1 require an external inductor?
No, the REG71055IDDCRQ1 does not require an external inductor. It uses a switched-capacitor (charge pump) architecture with internal MOSFET switches and an external 0.22 µF flying capacitor (CPUMP) to achieve step-up conversion. This eliminates magnetic components, reduces EMI, and simplifies layout - confirmed in the functional block diagram and typical application circuits of the SBAS477 datasheet.
What are the exact input voltage requirements for reliable startup of the REG71055IDDCRQ1?
The REG71055IDDCRQ1 requires a minimum input voltage of 3.0 V for guaranteed startup and regulation, with full operational range from 3.0 V to 5.5 V. Startup is verified down to 3.0 V with typical 2.2 µF input capacitor; below this threshold, the device may fail to initiate switching or maintain regulation. Input voltage must remain above 3.0 V during all operating conditions, including cold-crank events in automotive systems.
How does the enable (EN) pin function on the REG71055IDDCRQ1?
The EN pin on the REG71055IDDCRQ1 is an active-high digital control input. When pulled to ≥1.3 V (with respect to GND), the device operates normally; when pulled to ≤0.4 V, it enters shutdown mode with quiescent current reduced to <1 µA typical. The pin must never be left floating - TI specifies mandatory active termination via pull-up or pull-down resistor to ensure deterministic state during power-up and system reset sequences.
Which ceramic capacitor dielectrics are recommended for use with the REG71055IDDCRQ1?
Texas Instruments recommends X7R or X5R dielectric ceramic capacitors for CIN, COUT, and CPUMP in the REG71055IDDCRQ1. These dielectrics provide stable capacitance over temperature and voltage, low ESR (<0.1 Ω), and minimal microphonic effects - critical for achieving ≤35 mVPP output ripple. Avoid Y5V or Z5U types due to excessive capacitance loss and voltage coefficient drift that degrade regulation performance.
REG71055IDDCRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 5.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 60mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
REG71055IDDCRQ1 FAQ
1.How can I place an order for REG71055IDDCRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for REG71055IDDCRQ1 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 REG71055IDDCRQ1 reliable?
The price and inventory of REG71055IDDCRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REG71055IDDCRQ1 is usually 5 days.
3.What payment methods are accepted for REG71055IDDCRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REG71055IDDCRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for REG71055IDDCRQ1?
REG71055IDDCRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your REG71055IDDCRQ1 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 REG71055IDDCRQ1?
For technical support, including REG71055IDDCRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REG71055IDDCRQ1 requirements.
6.How does Aetrix verify that REG71055IDDCRQ1 is sourced from the original manufacturer or authorized distributors?
All REG71055IDDCRQ1 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 REG71055IDDCRQ1 meets industry standards.
7.What is the process for return or replacement of REG71055IDDCRQ1?
All REG71055IDDCRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with REG71055IDDCRQ1, 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 REG71055IDDCRQ1 part is unused and in its original packaging.
Return procedure for REG71055IDDCRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
REG71055IDDCRQ1 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…
