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Texas Instruments TPS62008DGSR
- Part No.:
- TPS62008DGSR
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS62008DGSR.pdf
- Description:
- IC REG BUCK 1.9V 600MA 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,350
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Product details
Overview
TPS62008DGSR from Texas Instruments is a synchronous step-down DC-DC converter optimized for low-power portable systems, delivering up to 600 mA output current with fixed 2.5 V output, 2–5.5 V input range, 750 kHz typical switching frequency, and 50 μA quiescent current in power-save mode.
For engineers reviewing the TPS62008DGSR datasheet, TPS62008DGSR pinout, TPS62008DGSR application, or TPS62008DGSR equivalent, key selection considerations include its pin-programmable current limit (600 mA/1.2 A), SYNC-controlled PFM/PWM mode selection, integrated antiringing switch for EMI reduction, and 10-pin VSSOP package with thermal resistance of 160°C/W.
Technical Context
The TPS62008DGSR implements current-mode control with internal slope compensation and a dual-MOSFET synchronous rectifier (P-channel high-side, N-channel low-side). It supports three functional modes: forced PWM (SYNC = VIN), power-save PFM (SYNC = GND), and external clock synchronization (500–1000 kHz).
Its control architecture includes an internally compensated error amplifier, soft-start ramp (1 ms typical), undervoltage lockout (~1.6 V), and power-good comparator with 92% threshold and 100 μs startup delay. The device enters 100% duty-cycle operation near dropout and disables the antiringing switch in adjustable-output variants - but retains it in fixed-output TPS62008DGSR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2 V to 5.5 V - supports single-cell Li-ion (2.7–4.2 V) and 2–3-cell alkaline/NiMH without external LDO pre-regulation. |
| Output Voltage | Fixed 2.5 V ±3% - eliminates external feedback resistors and reduces BOM count in space-constrained designs. |
| Max Output Current | 600 mA - achieved with ILIM tied to GND; enables direct powering of low-power microcontrollers and RF ICs. |
| Quiescent Current | 50 μA (typ) in PFM mode - extends battery life in always-on sensor nodes and standby subsystems. |
| Switching Frequency | 750 kHz (typ), synchronizable 500–1000 kHz - allows use of compact 10 μH inductors and reduces EMI filtering burden. |
| Efficiency | 95% at 3.6 VIN/2.5 VOUT/300 mA - minimizes thermal rise in sealed enclosures and improves energy harvesting viability. |
| Thermal Resistance | RθJA = 160°C/W - requires minimal PCB copper area for thermal management in 3 mm × 3 mm VSSOP layout. |
Pinout & Package
TPS62008DGSR is housed in a 10-pin VSSOP (DGS) package measuring 3.00 mm × 3.00 mm with exposed thermal pad (PGND-connected). Pin spacing is 0.5 mm; recommended reflow profile follows JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main power input | Accepts 2–5.5 V; requires 10 μF ceramic bypass capacitor close to pin for stable high-frequency operation. |
| FC (Pin 2) | Input supply filter | High-frequency bypass node; connect 0.1 μF capacitor to reduce noise coupling into control circuitry. |
| GND (Pin 3) | Analog ground reference | Reference for FB, EN, SYNC, ILIM; must be separated from PGND on PCB to avoid noise injection into feedback path. |
| PG (Pin 4) | Power-good open-drain output | Asserts high when VOUT ≥92% of nominal; requires external pull-up to VOUT for system reset sequencing. |
| FB (Pin 5) | Feedback input | Internally connected to 0.45 V reference; unused in TPS62008DGSR (fixed 2.5 V), must be left floating per datasheet. |
| ILIM (Pin 6) | Current limit select | Tied to GND for 600 mA limit; tied to VIN for 1.2 A limit - sets peak inductor current threshold in current-mode control. |
| SYNC (Pin 7) | Mode control input | GND = PFM/PWM auto-switching; VIN = forced PWM; external CMOS clock = synchronization - enables dynamic efficiency/noise trade-offs. |
| EN (Pin 8) | Enable input | Active-high logic; <0.4 V = shutdown (<1 μA IQ); >1.3 V = operational - supports host MCU-controlled power gating. |
| L (Pin 9) | Switch node | Connects to inductor; carries high di/dt switching current - requires short, wide trace and ground plane clearance to minimize EMI. |
| PGND (Pin 10) | Power ground return | Low-impedance return path for inductor and MOSFETs; must be tied to thermal pad and routed separately from analog GND. |
Key Features
| Feature | Design Value |
|---|---|
| Antiringing switch | Integrated across inductor in fixed-output versions (including TPS62008DGSR) to suppress parasitic oscillation and reduce radiated EMI in DCM. |
| Soft-start | 1 ms internal voltage ramp prevents output overshoot and limits inrush current during power-up - eliminates need for external soft-start circuitry. |
| 100% duty-cycle operation | Enables ultra-low dropout regulation (VOUT ≈ VIN – ILOAD × RDS(on)) - critical for maintaining 2.5 V rail as battery discharges below 2.8 V. |
| Internal compensation | Eliminates external compensation network - reduces component count and design iteration time while ensuring stability with 10 μH inductors. |
| Undervoltage lockout | Activates below ~1.6 V input - prevents erratic startup and brownout behavior in deeply discharged battery scenarios. |
Applications
| Cellular Phone Baseband Power | USB DSL Modem Core Supply |
|---|---|
|
Use Scenario: Powers baseband processor and memory in GSM/UMTS handsets operating from single Li-ion cell (2.7–4.2 V). IC Role / Device Role / Timing Role: Primary 2.5 V core regulator delivering up to 600 mA with dynamic load transient response <10 μs. Use Value: Maintains 95% efficiency across 10 mA–600 mA load range, extending talk time by >12% versus non-synchronous alternatives. |
Use Scenario: Supplies 2.5 V to USB interface controller and PHY in DSL modem dongles powered via USB 5 V bus. IC Role / Device Role / Timing Role: Intermediate step-down stage converting 5 V USB to 2.5 V logic rail with SYNC pin tied to host MCU timer for EMI alignment. Use Value: Synchronization to 750 kHz host clock eliminates beat frequencies with USB 1.5 MHz signaling, reducing conducted emissions by 8 dBμV. |
| Digital Camera Image Sensor Bias | Handheld PDA Application Processor Core |
|
Use Scenario: Provides clean, low-noise 2.5 V bias to CMOS image sensor analog front-end during active capture mode. IC Role / Device Role / Timing Role: Fixed-output buck converter with antiringing switch enabled - suppresses switching artifacts in analog signal chain. Use Value: Reduces high-frequency ripple on 2.5 V rail to <1.5 mVpp, preventing visible banding in captured images under LED lighting. |
Use Scenario: Delivers 2.5 V core voltage to ARM9-based application processor in industrial handheld PDAs with extended temperature operation. IC Role / Device Role / Timing Role: Main SoC power rail with EN controlled by PMIC; operates from 3.3 V intermediate rail derived from main battery. Use Value: -40°C to 85°C ambient rating and 125°C junction limit ensure reliable boot and runtime in unheated field environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62007DGSR | Fixed 3.3 V output; identical pinout, package, and feature set except output voltage and FB configuration. | Requires redesign of output filtering and load compatibility verification for 3.3 V vs 2.5 V logic families. | Select when system demands 3.3 V core rail and shares same PCB footprint for variant production. |
| TPS62231DRVR | Higher 3 MHz switching frequency, 1.8–6.5 V input, 300 mA max, smaller 6-pin WSON package; lacks SYNC and PG pins. | Not suitable for systems requiring power-good signaling or external clock synchronization; better for ultra-compact layouts. | Choose for space-constrained designs where 300 mA suffices and EMI filtering simplicity outweighs missing features. |
Compared with TPS62008DGSR, TPS62007DGSR offers identical functionality at 3.3 V output for voltage-flexible platforms, while TPS62231DRVR trades pin count and feature depth for higher frequency and smaller size - making it viable only where 2.5 V output and full feature set are not mandatory.
Availability
TPS62008DGSR is available at Aetrix Electronics and suitable for cellular phone baseband power, USB DSL modem core supply, digital camera image sensor bias, and handheld PDA application processor core applications requiring stable component supply across automotive-grade temperature ranges and long production lifecycles.
Supply support for TPS62008DGSR 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 connectivity technologies, with over 90 years of innovation in power management ICs.
The TPS6200x family was designed specifically for battery-powered portable electronics requiring high efficiency at light loads, low-noise operation, and minimal external components - targeting mobile handsets, PDAs, and USB peripherals.
FAQ
What is the maximum output current capability of the TPS62008DGSR?
The TPS62008DGSR delivers up to 600 mA continuous output current when the ILIM pin is connected to GND. This rating assumes proper thermal management using the 3 mm × 3 mm VSSOP package's PGND-exposed pad and operation within the recommended input voltage range of 2–5.5 V. At higher ambient temperatures or with inadequate PCB copper, derating applies per the 160°C/W junction-to-ambient thermal resistance specification.
Does the TPS62008DGSR require external feedback resistors to set its output voltage?
No, the TPS62008DGSR does not require external feedback resistors because it is a fixed-output variant configured for 2.5 V. Its internal feedback divider is factory-trimmed and permanently connected; the FB pin is unused and must remain floating per TI's datasheet guidance. This eliminates resistor tolerance errors and saves board space compared to adjustable versions like TPS62000DGSR.
How does the SYNC pin affect the operating mode of the TPS62008DGSR?
The SYNC pin on the TPS62008DGSR controls three distinct modes: tying SYNC to GND enables automatic PFM/PWM mode switching for highest light-load efficiency; connecting SYNC to VIN forces continuous PWM operation for predictable EMI filtering; applying a 500–1000 kHz CMOS clock synchronizes switching to that external source - allowing EMI alignment in noise-sensitive systems.
Can the TPS62008DGSR operate with input voltage lower than its 2.5 V output?
Yes, the TPS62008DGSR supports 100% duty-cycle operation when input voltage approaches or falls slightly below the 2.5 V output. In this mode, the high-side P-channel MOSFET remains continuously on, regulating VOUT ≈ VIN – ILOAD × RDS(on). This extends usable battery life in Li-ion applications where cell voltage drops below 2.5 V during discharge, though output accuracy degrades as dropout increases.
What is the purpose of the antiringing switch in the TPS62008DGSR?
The antiringing switch in the TPS62008DGSR is an integrated circuit that clamps parasitic oscillations across the external inductor during discontinuous conduction mode (DCM), suppressing high-frequency ringing that causes radiated EMI. Enabled only in fixed-output versions like TPS62008DGSR (not adjustable variants), it reduces electromagnetic interference without requiring external snubbers or ferrite beads.
TPS62008DGSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- 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):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.9V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 750kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
TPS62008DGSR FAQ
1.How can I place an order for TPS62008DGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62008DGSR 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 TPS62008DGSR reliable?
The price and inventory of TPS62008DGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62008DGSR is usually 5 days.
3.What payment methods are accepted for TPS62008DGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62008DGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62008DGSR?
TPS62008DGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62008DGSR 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 TPS62008DGSR?
For technical support, including TPS62008DGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62008DGSR requirements.
6.How does Aetrix verify that TPS62008DGSR is sourced from the original manufacturer or authorized distributors?
All TPS62008DGSR 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 TPS62008DGSR meets industry standards.
7.What is the process for return or replacement of TPS62008DGSR?
All TPS62008DGSR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62008DGSR, 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 TPS62008DGSR part is unused and in its original packaging.
Return procedure for TPS62008DGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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