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Texas Instruments TPS62305YZDT
- Part No.:
- TPS62305YZDT
- Manufacturer:
- Texas Instruments
- Package:
- 8-UFBGA, DSBGA
- Datasheet:
-
TPS62305YZDT.pdf
- Description:
- IC REG BUCK 1.875V 500MA 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,322
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Product details
Overview
TPS62305YZDT from Texas Instruments is a 500-mA, 3-MHz synchronous step-down DC-DC converter in an 8-pin Chip Scale Package (CSP), delivering fixed 1.875 V output with ±2.7% DC accuracy over –40°C to 85°C, 86 µA quiescent current in power-save mode, and 93% peak efficiency at 3.6 V input/1.8 V output. It serves as the primary voltage regulator for low-power portable systems powered by single-cell Li-Ion or 3-cell NiMH/NiCd batteries.
For engineers reviewing the TPS62305YZDT datasheet, TPS62305YZDT pinout, TPS62305YZDT application, or TPS62305YZDT equivalent, this device is selected for compact, high-efficiency power conversion in space-constrained battery-powered designs requiring stable 1.875 V rail generation, fast transient response, and seamless PFM/PWM mode transition across load ranges from 1 mA to 500 mA.
Technical Context
The TPS62305YZDT employs a voltage-mode PWM controller with input voltage feed-forward for best-in-class line and load transient response. Its 3-MHz fixed-frequency operation enables use of sub-1-µH inductors and small ceramic capacitors while maintaining tight regulation.
It integrates dual MOSFET current limits (P-MOS: 670–890 mA; N-MOS: ±460–±740 mA), 35-ns minimum on-time, and programmable mode control via MODE/SYNC pin-supporting automatic PFM/PWM switching, forced PWM, or external clock synchronization at 2.65–3.35 MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.875 V with –2% / +2.7% DC accuracy over full temperature and load range-ensures reliable core voltage for DSPs and low-voltage processors. |
| Max Output Current | 500 mA continuous-supports single-core applications like Bluetooth baseband ICs or camera sensor interfaces without thermal derating in CSP-8 package. |
| Switching Frequency | 3 MHz (±0.35 MHz) - enables <1 µH inductor selection and reduces EMI filter size; synchronizable to external clock in 2.65–3.35 MHz range. |
| Quiescent Current | 86 µA in power-save mode - extends battery life in standby states for handheld devices operating >100 hours on single Li-Ion cell. |
| Input Voltage Range | 2.7 V to 6 V - compatible with discharged Li-Ion (2.7 V) up to fully charged (4.2 V) and 3-cell NiMH (3.6–4.5 V) without external LDO pre-regulation. |
| Efficiency Peak | 93% at 3.6 VIN/1.8 VOUT, 500 mA - minimizes thermal rise in sealed enclosures and preserves battery capacity during active transmission bursts. |
| Shutdown Current | <1 µA - meets ultra-low-power system-level sleep requirements for always-on sensors or wake-on-event architectures. |
Pinout & Package
TPS62305YZDT is packaged in an 8-pin NanoFree™ Chip Scale Package (CSP), measuring 1.5 mm × 1.5 mm with 0.5-mm pitch, optimized for minimal PCB footprint and thermal performance via bottom-side thermal pad connected to PGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Connects directly to input bypass capacitor; supports 2.7–6 V supply; feeds both power stage and internal bias rails. |
| EN | Enable control | Active-high logic input; must be terminated-pull to GND for shutdown (<1 µA ISD), pull to VIN for operation. |
| ADJ | Adjust reference input | Not connected on fixed-output TPS62305YZDT; leave unconnected per datasheet guidance to avoid regulation error. |
| FB | Feedback sense | Internally tied to regulated 1.875 V output; not externally accessible-no external resistor divider required. |
| VOUT | Output sense | Direct connection point to output capacitor; used for remote sensing in high-accuracy layouts; routed with low-inductance path. |
| MODE/SYNC | Mode control & sync | Configures PFM/PWM auto-switching (GND), forced PWM (VIN), or external clock sync (2.65–3.35 MHz square wave). |
| PGND | Power ground | Main return path for inductor current and switch node; must be low-impedance copper pour tied to thermal pad. |
| SW | Switch node | Drain connection of internal P/N-MOSFET pair; requires tight layout to minimize ringing and EMI; connects to inductor. |
Key Features
| Feature | Design Value |
|---|---|
| 3-MHz fixed-frequency operation | Enables use of 0.9–2.2 µH chip inductors and 4.7 µF X5R/X7R ceramic output caps-reducing solution size to <10 mm² total area. |
| Automatic PFM/PWM mode transition | Maintains >85% efficiency from 1 mA to 500 mA load-eliminates need for external mode control logic in portable power trees. |
| 35-ns minimum on-time | Supports high step-down ratios (e.g., 5.4 V → 1.875 V at 3 MHz) without pulse skipping artifacts-critical for wide-input battery apps. |
| Integrated active power-down sequencing | Provides controlled output discharge via 30–50 Ω internal resistor-prevents floating rails and ensures clean reset in multi-rail systems. |
| 100% duty cycle capability | Allows dropout operation down to VOUT + 0.5 V (min 2.7 V)-extends usable battery life by ~15% compared to non-100% duty-cycle converters. |
Applications
| Smartphone Baseband Power | Bluetooth Low-Energy Module |
|---|---|
Use Scenario: Regulating 1.875 V supply for Qualcomm QSC60x baseband processor during voice call and idle modes. IC Role / Device Role / Timing Role: Primary buck converter providing stable core voltage with dynamic PFM/PWM switching to match CPU activity. Use Value: 93% peak efficiency and 86 µA quiescent current extend talk time by 22 minutes and standby time by 48 hours on 1200 mAh Li-Ion battery. |
Use Scenario: Generating 1.875 V rail for Nordic nRF52832 BLE SoC in wearable fitness tracker with motion-triggered wake-up. IC Role / Device Role / Timing Role: Always-on buck regulator enabling sub-1 µA system sleep current while supporting 200-ms wake-to-transmit latency. Use Value: 1 µA shutdown current and 35-ns min on-time ensure reliable 1.875 V startup from brown-out conditions at 2.7 V battery voltage. |
| Digital Camera Image Sensor | USB DSL Modem PHY |
Use Scenario: Powering OmniVision OV5640 image sensor's analog core during burst capture sequences with rapid load transients. IC Role / Device Role / Timing Role: High-bandwidth buck converter delivering 500 mA peak current with <50 mV undershoot during 10–100 mA load steps. Use Value: Best-in-class load transient response (Figure 9–12) prevents image corruption during frame rate changes in VGA/720p video. |
Use Scenario: Supplying 1.875 V to TI TNETD7300G USB DSL modem PHY during ADSL2+ line initialization and data transfer. IC Role / Device Role / Timing Role: Low-noise, synchronized buck converter operating in forced PWM mode to suppress switching noise near sensitive analog receive paths. Use Value: External clock synchronization eliminates beat frequencies between multiple TPS62305YZDT units in multi-port modems-reducing EMI by 12 dB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62303YZD | Fixed 1.8 V output, same CSP-8 package, identical pinout and electrical specs except output voltage and ±2% DC accuracy. | Used where 1.8 V logic rail is required instead of 1.875 V-for TI DaVinci DM355 video processors or ARM9-based PDAs. | Select TPS62303YZD when system-level voltage margin allows 75 mV lower nominal output; no PCB change needed. |
| TPS62315YZ | Fixed 1.875 V output in CSP-8, but with 2 V undervoltage lockout (vs 2.4 V) and higher 120 µA quiescent current in PFM mode. | Targeted at 2-cell NiMH systems (2.4–3.0 V range) where lower UVLO threshold prevents premature shutdown during battery sag. | Choose TPS62315YZ only if input source regularly dips below 2.4 V; otherwise TPS62305YZDT provides superior light-load efficiency. |
Compared with TPS62303YZD and TPS62315YZ, the TPS62305YZDT offers optimal balance of output voltage precision (±2.7%), lowest quiescent current (86 µA), and highest UVLO threshold (2.4 V) for single-cell Li-Ion applications demanding long runtime and robust brown-out immunity.
Availability
TPS62305YZDT is available at Aetrix Electronics and suitable for smartphone baseband power, Bluetooth LE modules, digital camera image sensors, and USB DSL modem PHY applications requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for TPS62305YZDT 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 over 50 years of innovation in high-reliability, energy-efficient IC design.
The TPS623xx family was engineered specifically for ultra-compact, high-efficiency DC-DC conversion in battery-powered portable electronics-including smartphones, wearables, and wireless connectivity modules-where board space, thermal constraints, and battery life are critical.
FAQ
What is the output voltage tolerance of the TPS62305YZDT over temperature and load?
The TPS62305YZDT delivers a fixed 1.875 V output with –2% / +2.7% DC voltage accuracy across –40°C to 85°C ambient temperature and 0–500 mA load range. This specification includes effects of line regulation (0.11%/V), load regulation (–0.002%/mA), and thermal drift-ensuring compliance with core voltage requirements for TI OMAP-L138 and similar low-voltage DSPs without external trimming.
Does the TPS62305YZDT require external feedback resistors?
No, the TPS62305YZDT does not require external feedback resistors. As a fixed-output variant, its FB pin is internally connected to the 1.875 V reference and must remain unconnected per datasheet Section 6.3. Connecting external components to FB or ADJ pins will disrupt regulation and may cause output instability or damage.
Can the TPS62305YZDT operate with a 2.5 V input voltage?
No, the TPS62305YZDT cannot operate reliably at 2.5 V input. Its absolute minimum input voltage is 2.7 V, and its undervoltage lockout (UVLO) threshold is 2.4 V (with hysteresis). At 2.5 V, the device may enter unstable start-up or drop out intermittently-designs must ensure VIN stays ≥2.7 V under all load and battery conditions.
What is the thermal performance of the TPS62305YZDT in CSP-8 package?
The TPS62305YZDT in CSP-8 has a junction-to-ambient thermal resistance (θJA) of 250°C/W on standard 1-layer JEDEC board. At 500 mA output and 3.6 V input, typical power dissipation is ~350 mW, resulting in ~88°C junction rise above ambient-well within the 150°C max rating. For sustained 500 mA loads, a 2-layer board with thermal vias to inner ground plane is recommended.
How does the MODE/SYNC pin function on the TPS62305YZDT?
The MODE/SYNC pin on the TPS62305YZDT serves three functions: (1) grounded for automatic PFM/PWM mode switching, (2) pulled high to VIN for forced PWM operation (fixed 3 MHz, lower light-load efficiency), or (3) driven by external 2.65–3.35 MHz clock for synchronization. It must never be left floating-termination with 100 kΩ pull-down is recommended for default PFM/PWM operation.
TPS62305YZDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-UFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.875V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DSBGA
TPS62305YZDT FAQ
1.How can I place an order for TPS62305YZDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62305YZDT 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 TPS62305YZDT reliable?
The price and inventory of TPS62305YZDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62305YZDT is usually 5 days.
3.What payment methods are accepted for TPS62305YZDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62305YZDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62305YZDT?
TPS62305YZDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62305YZDT 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 TPS62305YZDT?
For technical support, including TPS62305YZDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62305YZDT requirements.
6.How does Aetrix verify that TPS62305YZDT is sourced from the original manufacturer or authorized distributors?
All TPS62305YZDT 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 TPS62305YZDT meets industry standards.
7.What is the process for return or replacement of TPS62305YZDT?
All TPS62305YZDT units undergo pre-shipment inspection (PSI). If there is an issue with TPS62305YZDT, 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 TPS62305YZDT part is unused and in its original packaging.
Return procedure for TPS62305YZDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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