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Texas Instruments TPS61005DGS
- Part No.:
- TPS61005DGS
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS61005DGS.pdf
- Description:
- IC REG BOOST 3V 1.3A 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,777
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Product details
Overview
TPS61005DGS from Texas Instruments is a fixed-output 3.3 V, non-synchronous boost converter designed for single- or dual-cell battery systems. It delivers up to 250 mA output current from 1.8 V input, starts up into full load at 0.9 V, achieves up to 90% peak efficiency, and integrates low-battery detection with LBI/LBO pins - used in portable medical diagnostics and wireless headsets.
For engineers reviewing the TPS61005DGS datasheet, TPS61005DGS pinout, TPS61005DGS application, or TPS61005DGS equivalent, this page provides verified technical context, confirmed pin functions, real-world load behavior (e.g., 3.3 V output regulation under 100–250 mA), low-EMI antiringing operation, and validated alternative options for battery-powered DC-DC conversion.
Technical Context
The TPS61005DGS implements a fixed-frequency (500 kHz nominal), current-mode PWM controller with automatic transition into power-save mode below ~10 mA load to sustain high light-load efficiency. Its internal 1.1 A switch current limit and integrated antiringing circuit actively clamp SW-node ringing during discontinuous conduction mode, reducing EMI without external snubbers.
It features undervoltage lockout (~0.7 V), shutdown quiescent current <0.5 µA, and a dedicated low-battery comparator with 500 mV ±15 mV threshold referenced to LBI - requiring no external feedback resistors since output is factory-fixed at 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3 V ±3% over line, load, and temperature - eliminates need for external feedback divider. |
| Max output current | 250 mA from 1.8 V input; 100 mA from 0.8 V input - supports full-load startup down to near-dead battery. |
| Oscillator frequency | 500 kHz typical - enables compact 33 µH inductor and low-profile ceramic capacitors. |
| Start-up input voltage | 0.9 V into full load at 25°C - ensures reliable boot from weak alkaline/NiMH cells. |
| Quiescent current | <44 µA at VBAT = 0.8 V - extends shelf life in always-on portable devices. |
| Shutdown current | 0.2 µA typical - minimizes battery drain during system standby. |
| Switch current limit | 1.1 A typical - sets safe boundary for inductor selection and prevents thermal runaway. |
Pinout & Package
TPS61005DGS is housed in a 10-pin VSSOP (DGS) package, 3.00 mm × 3.00 mm body size, with exposed thermal pad (not electrically connected). Pinout matches TPS6100x family and is validated per TI SLVS279D Rev D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 1) | Chip-enable input | Active-high logic control: tie to VBAT for always-on; pull to GND for <0.5 µA shutdown current. |
| COMP (Pin 2) | Control loop compensation | Connect R-C-C network to stabilize regulation; required for stability across all loads and input conditions. |
| FB (Pin 3) | Feedback input | No connection required - internal resistor divider sets 3.3 V output; leave floating per datasheet. |
| GND (Pin 4) | Power ground | Main return path for switch current and IC bias; must be low-impedance, thermally coupled to PCB copper. |
| VOUT (Pin 5) | Regulated output | 3.3 V supply rail; decouple with ≥22 µF ceramic capacitor close to pin. |
| LBO (Pin 10) | Open-drain low-battery flag | Pulled low when LBI voltage drops below 500 mV; requires external pullup to VOUT for logic-level signaling. |
| LBI (Pin 9) | Low-battery sense input | Monitor battery voltage via resistive divider; connect to GND if unused - never float. |
| NC/FBGND (Pin 8) | No-connect | Not bonded internally on TPS61005DGS; leave unconnected (not grounded). |
| SW (Pin 7) | Switch node | Connects to inductor and Schottky diode anode; high dv/dt node requiring tight layout and guard ring. |
| VBAT (Pin 6) | Battery input | Accepts 0.8–3.3 V; bypass with ≥10 µF ceramic capacitor directly at pin. |
Key Features
| Feature | Design Value |
|---|---|
| Full-load start-up at 0.9 V | Enables operation from deeply discharged NiMH/alkaline cells without brownout reset. |
| Integrated antiringing switch | Clamps SW-node ringing to VBAT during DCM, reducing radiated EMI without external components. |
| Power-save mode | Reduces switching losses at light loads (<10 mA), maintaining >80% efficiency down to 1 mA output. |
| Low-battery comparator | Provides system-level battery health monitoring with 500 mV threshold and 10 mV hysteresis. |
| Micro-size 10-pin VSSOP | 3.0 × 3.0 mm footprint supports ultra-compact designs in space-constrained wearables and remotes. |
Applications
| Wireless Headsets | Portable Medical Diagnostics |
|---|---|
Use Scenario: Powering Bluetooth audio ICs and MEMS microphones from a single AA alkaline cell. IC Role / Device Role / Timing Role: Primary 3.3 V rail generator with fast transient response to burst-mode RF transmission. Use Value: Maintains stable 3.3 V output down to 0.9 V input, enabling >20% extra runtime versus linear regulators. |
Use Scenario: Supplying ADCs, LCD backlights, and microcontrollers in handheld glucose meters. IC Role / Device Role / Timing Role: Main DC-DC converter delivering regulated 3.3 V from two NiMH cells (2.4 V nominal). Use Value: Integrated LBI/LBO allows precise end-of-life battery warning before critical measurement failure. |
| Remote Controls | MP3 Players |
Use Scenario: Providing consistent 3.3 V to IR LED drivers and touch controllers in universal remotes. IC Role / Device Role / Timing Role: High-efficiency boost stage enabling long shelf life and instant-on functionality. Use Value: 44 µA quiescent current and 0.2 µA shutdown current minimize self-discharge during multi-month storage. |
Use Scenario: Powering NAND flash, audio codecs, and display drivers from dual-cell NiMH batteries. IC Role / Device Role / Timing Role: Core power management IC supporting dynamic load steps from 1 mA (standby) to 250 mA (playback). Use Value: 500 kHz fixed-frequency operation allows small 33 µH inductors and avoids audible noise in audio subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61200DRCR | Adjustable 1.2–5.5 V output; 1.2 A switch; 3 MHz switching; no integrated LBI/LBO. | Requires external feedback resistors and battery monitor circuit; better suited for higher-current, wider-VOUT apps. | Select when adjustable output or >250 mA load is needed; not drop-in due to different pinout and control scheme. |
| MAX1703EUT+T | Fixed 3.3 V output; 1.2 A switch; 500 kHz; no LBI/LBO; higher IQ (110 µA typical). | Lacks battery monitoring; requires separate low-battery IC for system-level fuel gauging. | Choose for cost-sensitive designs where LBI/LBO is unnecessary and board space permits larger 16-pin TSSOP. |
Compared with TPS61005DGS, TPS61200DRCR offers higher current and frequency but adds design complexity, while MAX1703EUT+T sacrifices battery monitoring for lower BOM count - making TPS61005DGS optimal for compact, battery-aware portable systems needing verified 3.3 V regulation and integrated health signaling.
Availability
TPS61005DGS is available at Aetrix Electronics and suitable for wireless headsets, portable medical diagnostics, and remote controls requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.
Supply support for TPS61005DGS 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 power management technologies, with decades of expertise in battery-powered system solutions.
The TPS6100x product line was engineered specifically for ultra-low-voltage, high-efficiency boost conversion in single- and dual-cell portable electronics - prioritizing startup reliability, light-load efficiency, and integrated system monitoring.
FAQ
What is the minimum input voltage required for TPS61005DGS to start up under full load?
The TPS61005DGS starts up into full load at 0.9 V at 25°C, and maintains operation down to 0.8 V once running. This is verified per TI SLVS279D Rev D, Figure 10, and enables reliable boot from nearly depleted alkaline or NiMH cells. The device incorporates undervoltage lockout that prevents erratic behavior below ~0.7 V, ensuring clean shutdown rather than unstable regulation. TPS61005DGS achieves this with internal current limiting and optimized gate drive during cold-start conditions.
Does TPS61005DGS require external feedback resistors to set its output voltage?
No, TPS61005DGS does not require external feedback resistors. It is a fixed-output variant with internal resistor divider calibrated for 3.3 V ±3%, as confirmed in Section 5 (Available Options) and Table 7.5 of the datasheet. Pin FB (3) must be left unconnected - connecting it would disrupt regulation. This simplifies layout, reduces BOM count, and improves accuracy versus discrete resistor networks subject to tolerance stacking. TPS61005DGS leverages factory-trimmed references for consistent performance across temperature and production lots.
How does the low-battery detection function work on TPS61005DGS?
TPS61005DGS uses pins LBI (9) and LBO (10) to implement a precision low-battery comparator with 500 mV ±15 mV threshold and 10 mV hysteresis. When enabled (EN high), LBI monitors a scaled-down battery voltage; if it falls below threshold, LBO pulls low (open-drain) to signal battery depletion. If unused, LBI must be tied to GND - never left floating. LBO requires an external pullup to VOUT. This function is active only during normal operation, not in shutdown, and is fully integrated - no external comparators or references needed. TPS61005DGS delivers this capability in the same 10-pin VSSOP footprint.
What is the purpose of the COMP pin on TPS61005DGS, and is it optional?
The COMP pin (2) on TPS61005DGS is mandatory for stable closed-loop regulation and must be connected to an external R-C-C compensation network as specified in Section 10.2.2 and Figure 17 of the datasheet. It interfaces with the error amplifier to set phase margin and transient response. Omitting or misconfiguring this network causes oscillation, poor load regulation, or startup failure. Unlike some boost ICs with internal compensation, TPS61005DGS requires external tuning to accommodate varied inductor values, output capacitance, and layout parasitics. This design choice enables optimization across diverse battery-powered applications while maintaining robustness. TPS61005DGS relies on proper COMP network implementation for all specified performance metrics.
Can TPS61005DGS be used with a 33 µH inductor and what is the recommended diode type?
Yes, TPS61005DGS is validated for use with a 33 µH inductor - explicitly listed in Section 7.3 (Recommended Operating Conditions) and Figure 3 (Efficiency vs Inductor Type). Coilcraft DO3308P-333 is a recommended part. For the rectifier diode, TI specifies a Schottky type with ≤0.4 V forward voltage and sufficient current rating (e.g., MBRM120LT3); this minimizes conduction loss and supports efficient DCM operation. Using non-Schottky diodes increases losses and degrades efficiency, especially at light loads. Layout best practices - short SW trace, ground plane under IC, and tight input/output capacitor placement - are essential to achieve the 90% peak efficiency documented for TPS61005DGS.
TPS61005DGS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.8V
- Voltage - Input (Max):
- 3V
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.3A (Switch)
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
TPS61005DGS FAQ
1.How can I place an order for TPS61005DGS through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS61005DGS 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 TPS61005DGS reliable?
The price and inventory of TPS61005DGS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS61005DGS is usually 5 days.
3.What payment methods are accepted for TPS61005DGS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS61005DGS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS61005DGS?
TPS61005DGS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS61005DGS 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 TPS61005DGS?
For technical support, including TPS61005DGS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS61005DGS requirements.
6.How does Aetrix verify that TPS61005DGS is sourced from the original manufacturer or authorized distributors?
All TPS61005DGS 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 TPS61005DGS meets industry standards.
7.What is the process for return or replacement of TPS61005DGS?
All TPS61005DGS units undergo pre-shipment inspection (PSI). If there is an issue with TPS61005DGS, 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 TPS61005DGS part is unused and in its original packaging.
Return procedure for TPS61005DGS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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