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Texas Instruments TLV61225DCKR
- Part No.:
- TLV61225DCKR
- Manufacturer:
- Texas Instruments
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
TLV61225DCKR.pdf
- Description:
- IC REG BOOST 3.3V 160MA SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:24,248
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Product details
Overview
TLV61225DCKR from Texas Instruments is a fixed-output 3.3-V synchronous step-up DC-DC converter optimized for single-cell battery systems. It operates from 0.7 V to 3.3 V input, delivers >40 mA output from 1.2 V input, achieves up to 94% efficiency, and integrates overvoltage, overtemperature, and undervoltage lockout protection. It serves as the primary power rail generator in ultra-low-power portable instrumentation.
For engineers reviewing the TLV61225DCKR datasheet, TLV61225DCKR pinout, TLV61225DCKR application, or TLV61225DCKR equivalent, key selection criteria include its 5-μA quiescent current, 400-mA switch current rating, pass-through function during shutdown, SC-70 package footprint, and fixed 3.3-V output with ±3.5% regulation tolerance.
Technical Context
The TLV61225DCKR implements a hysteretic current-mode control architecture that maintains constant 200-mA inductor ripple current and adjusts offset based on load. Its synchronous rectification uses two low-RDS(on) MOSFETs (600 mΩ main switch, 1000 mΩ rectifier) to minimize conduction loss across the 0.7–3.3 V input range.
Startup begins via internal oscillator when VIN < 1.8 V, transitioning to normal hysteretic operation once VOUT reaches ~1.8 V. During overload, the device enters current-limit mode; if VOUT drops below VIN, the rectifier's body diode conducts, limiting current only by parasitic resistances until load decreases.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±3.5% (3.13–3.43 V), internally trimmed - eliminates external feedback resistor network |
| Input Voltage Range | 0.7 V to 3.3 V - supports single-cell alkaline/NiMH (0.9–1.5 V) and Li-primary (2.0–3.3 V) batteries |
| Quiescent Current | 5 μA - enables >1-year battery life in always-on sensor nodes powered by CR2032 |
| Switch Current Limit | 400 mA typical - sustains >40 mA output at 1.2 V input while maintaining regulation |
| Efficiency | Up to 94% at mid-load - reduces thermal stress and extends runtime in space-constrained wearables |
| Shutdown Current | 0.2–1 μA - minimizes battery drain during system sleep modes |
| UVLO Threshold | 500 mV with 50-mV hysteresis - prevents deep discharge of primary cells and ensures clean restart |
Pinout & Package
TLV61225DCKR is housed in a 2.0 mm × 1.25 mm SC-70 (DCK) package with 6 pins, optimized for high-density PCB layouts in portable medical and consumer devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input voltage supply | Connects to battery or low-voltage source; must be bypassed with ≥10-μF ceramic capacitor near pin |
| L | Inductor connection | Drives external 4.7-μH inductor; carries peak switching current up to 400 mA |
| GND | Power and control ground | Common reference for all circuitry; requires low-impedance connection to PCB ground plane |
| VOUT | Regulated output | Delivers fixed 3.3-V supply; requires ≥10-μF output capacitor placed adjacent to pin |
| FB | Feedback sense input | Internally connected to output divider; must be shorted directly to VOUT - no external resistors |
| EN | Enable control | Active-high logic input; drives into high-impedance state when pulled low to disable converter and reduce leakage to <1 μA |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous boost topology | Eliminates external Schottky diode, reducing BOM count and improving efficiency by 8–12% vs. asynchronous designs |
| Pass-through function | During EN = low, VOUT connects to VIN via rectifier body diode - maintains partial system operation without external bypass path |
| Overvoltage protection | Clamps output at 5.5–7.5 V - safeguards downstream 3.3-V logic during FB open-circuit or feedback trace failure |
| Thermal shutdown with hysteresis | Disables at 140°C junction temperature and re-enables at 120°C - prevents thermal runaway in sealed enclosures |
| Hysteretic current-mode control | Enables stable operation without external compensation components - simplifies design and improves transient response |
Applications
| Wireless Sensor Node Power | Portable Pulse Oximeter |
|---|---|
Use Scenario: Battery-powered IoT node with BLE radio, temperature/humidity sensor, and microcontroller operating intermittently. IC Role / Device Role / Timing Role: Primary 3.3-V rail generator enabling MCU wake-up, sensor sampling, and RF transmission bursts. Use Value: 5-μA quiescent current extends CR2032 battery life beyond 18 months; 94% efficiency minimizes heat in epoxy-potted enclosure. | Use Scenario: Handheld medical device using red/IR LEDs, photodiode, and analog front-end powered by single AAA cell. IC Role / Device Role / Timing Role: Supplies regulated 3.3-V bias to analog signal chain and digital controller during LED pulsing cycles. Use Value: Pass-through function maintains LED bias during shutdown intervals; UVLO prevents battery damage below 0.5 V. |
| Smart Toothbrush Control | Disposable Glucose Monitor |
Use Scenario: Rechargeable personal care product with motor driver, pressure sensor, and Bluetooth LE interface. IC Role / Device Role / Timing Role: Generates stable 3.3-V supply from 1.2-V NiMH cell stack during high-current motor startup and data transmission. Use Value: 400-mA switch current rating supports 100-ms motor surge without output droop; SC-70 footprint saves >1.5 mm² board area. | Use Scenario: Single-use diagnostic strip reader using coin cell and disposable test cartridge. IC Role / Device Role / Timing Role: Provides precise 3.3-V reference for ADC and electrochemical sensor biasing during 60-second measurement cycle. Use Value: Fixed 3.3-V output eliminates calibration drift from external resistor tolerances; overvoltage protection guards against ESD-induced rail faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61200DRCT | Adjustable output (0.9–5.5 V); higher 1.2-A switch current; 2.5-μA IQ; requires external feedback resistors | Supports multi-rail systems needing 1.8 V or 5 V outputs; less suitable for cost-sensitive fixed-3.3-V designs | Select when output flexibility or higher current is required; adds BOM cost and layout complexity |
| MAX756CSA+ | Fixed 3.3-V output; 300-mA switch current; 18-μA IQ; requires external Schottky diode | Better suited for legacy designs where synchronous rectification is not critical; lower efficiency at light loads | Choose for drop-in replacement in existing MAX756-based boards; expect ~5% lower efficiency and larger solution size |
Compared with TPS61200DRCT and MAX756CSA+, the TLV61225DCKR offers the lowest quiescent current and smallest footprint for fixed 3.3-V battery boost, making it optimal for space- and energy-constrained disposable and wearable applications.
Availability
TLV61225DCKR is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical diagnostics, personal care devices, smart wearables, and disposable electronics requiring stable component supply with long-lifecycle support.
Supply support for TLV61225DCKR 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 and embedded processing solutions for industrial, automotive, and personal electronics markets.
The TLV61225DCKR belongs to TI's low-power DC-DC boost converter family, designed specifically for extending battery life and minimizing solution size in single-cell, ultra-low-power portable systems.
FAQ
What is the minimum input voltage required for TLV61225DCKR to start switching?
The TLV61225DCKR starts switching at a minimum input voltage of 0.7 V, enabled by its internal start-up oscillator. Below ~1.8 V, the device operates in oscillator-controlled mode with current-limited switching until VOUT reaches sufficient level to power the control circuitry, after which it transitions to normal hysteretic current-mode operation. This ensures reliable start-up even from deeply discharged alkaline cells.
Does TLV61225DCKR require external feedback resistors to set the output voltage?
No, the TLV61225DCKR features an internally trimmed fixed 3.3-V output. The FB pin is internally connected to a precision voltage divider and must be shorted directly to VOUT - no external resistors are needed or permitted. This eliminates resistor tolerance errors and reduces bill-of-materials count, simplifying design and improving long-term output stability.
How does TLV61225DCKR behave when the EN pin is pulled low?
When EN is pulled low, the TLV61225DCKR enters shutdown mode: switching ceases, internal control circuitry powers down, and quiescent current drops to 0.2–1 μA. Crucially, the rectifier MOSFET's body diode remains forward-biased, allowing VIN to pass through to VOUT - providing a passive "pass-through" path that maintains partial system functionality without requiring an external bypass diode.
What protection features are integrated into TLV61225DCKR?
The TLV61225DCKR integrates four key protections: (1) Overvoltage protection clamps VOUT at 5.5–7.5 V if FB is disconnected; (2) Overtemperature protection disables operation above 140°C with 20°C hysteresis; (3) Undervoltage lockout halts operation below 500 mV input to prevent battery deep discharge; (4) Internal 400-mA switch current limit prevents destructive inductor saturation during overload or short-circuit events.
Can TLV61225DCKR drive a 15-mA load from a 1.2-V alkaline cell?
Yes, the TLV61225DCKR is specified to deliver more than 40-mA output current from a 1.2-V input, well exceeding 15-mA requirement. At this condition, typical efficiency exceeds 88%, and output regulation remains within ±3.5% (3.13–3.43 V). Performance is validated across –40°C to 85°C ambient, supporting reliable operation in consumer and medical environments.
TLV61225DCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.7V
- Voltage - Input (Max):
- 3.3V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 160mA (Switch)
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
TLV61225DCKR FAQ
1.How can I place an order for TLV61225DCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV61225DCKR 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 TLV61225DCKR reliable?
The price and inventory of TLV61225DCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV61225DCKR is usually 5 days.
3.What payment methods are accepted for TLV61225DCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV61225DCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV61225DCKR?
TLV61225DCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV61225DCKR 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 TLV61225DCKR?
For technical support, including TLV61225DCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV61225DCKR requirements.
6.How does Aetrix verify that TLV61225DCKR is sourced from the original manufacturer or authorized distributors?
All TLV61225DCKR 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 TLV61225DCKR meets industry standards.
7.What is the process for return or replacement of TLV61225DCKR?
All TLV61225DCKR units undergo pre-shipment inspection (PSI). If there is an issue with TLV61225DCKR, 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 TLV61225DCKR part is unused and in its original packaging.
Return procedure for TLV61225DCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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