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Texas Instruments TPS62315YZR
- Part No.:
- TPS62315YZR
- Manufacturer:
- Texas Instruments
- Package:
- 8-UFBGA, CSPBGA
- Datasheet:
-
TPS62315YZR.pdf
- Description:
- IC REG BUCK 1.875V 500MA 8CSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,952
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Product details
Overview
TPS62315YZR from Texas Instruments is a 500-mA, 3-MHz synchronous step-down DC-DC converter in Chip Scale Package (CSP-8), delivering fixed 1.875 V output from 2.7–6 V input with up to 93% efficiency. It features power-save mode operation at light loads, 35-ns minimum on-time, and integrated active power-down sequencing-designed for space-constrained mobile phones and smart-phones powered by single-cell Li-Ion or 3-cell NiMH/NiCd batteries.
For engineers reviewing the TPS62315YZR datasheet, TPS62315YZR pinout, TPS62315YZR application, or TPS62315YZR equivalent, key selection criteria include its 1.875 V fixed output voltage, CSP-8 package footprint, 3-MHz switching frequency compatibility with external synchronization, and ultra-low 86 µA quiescent current in PFM mode-critical for battery runtime optimization in portable electronics.
Technical Context
The TPS62315YZR employs a voltage-mode PWM controller with input voltage feed-forward for best-in-class load and line transient response. Its dual MOSFET current-limit architecture-720 mA P-channel and 550 mA N-channel-enables stable operation across wide duty cycles, including low-VOUT/high-VIN conditions.
It operates in automatic PFM/PWM mode (MODE/SYNC = GND) or forced PWM (MODE/SYNC = VIN), with on-the-fly synchronization to external 3-MHz clocks. The internal soft-start limits inrush current, while undervoltage lockout (UVLO) activates at 2.0 V to prevent brownout operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.875 V ±0.5% (–0.5%/+1.3% over –40°C to +85°C), enabling direct supply to 1.8-V core logic with minimal regulation error. |
| Input Voltage Range | 2.7 V to 6 V, supporting single-cell Li-Ion (3.0–4.2 V) and 3-cell NiMH/NiCd (3.6 V nominal) battery inputs without external regulators. |
| Max Output Current | 500 mA continuous, sufficient for powering DSP cores, RF transceivers, or memory subsystems in handheld devices. |
| Switching Frequency | 3 MHz (2.65–3.35 MHz range), allowing use of sub-1-µH inductors and compact 4.7-µF ceramic output capacitors for minimal board area. |
| Quiescent Current | 86 µA in PFM mode (no load), extending battery life in standby/sleep states of portable applications. |
| UVLO Threshold | 2.0 V (min), preventing unstable operation during battery discharge below functional voltage. |
| Efficiency Peak | Up to 93% at 3-MHz operation, reducing thermal load and enabling 1-mm profile solutions in ultra-thin form factors. |
Pinout & Package
TPS62315YZR uses an 8-pin NanoFree™ Chip Scale Package (CSP-8), bottom-view layout with solder bumps aligned to JEDEC MO-220 standard. Package dimensions are 1.5 mm × 1.5 mm × 0.55 mm, compatible with standard SMT reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Supplies high-side P-MOSFET; requires local 4.7-µF ceramic bypass capacitor directly adjacent to pin. |
| EN | Enable control | Active-high logic input; must be pulled to VIN or grounded-floating not allowed; enables full shutdown (<1 µA ISD). |
| ADJ | Adjust reference | Not connected on fixed-output TPS62315YZR; must remain unconnected per datasheet to avoid regulation errors. |
| FB | Feedback sense | Internally tied to 1.875 V reference; not accessible on fixed-output version-pin left unconnected. |
| VOUT | Output sense | Connects to converter output node for feedback path; routed with low-inductance trace to minimize noise coupling. |
| AGND | Analog ground | Separate analog reference ground; internally connected to PGND via PowerPAD™-must be tied to system ground plane. |
| MODE/SYNC | Mode control | Configures PFM/PWM auto-switching (GND) or forced PWM (VIN); also accepts external 3-MHz sync clock signal. |
| PGND | Power ground | High-current return path for both MOSFETs; requires solid copper pour under package for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| 3-MHz fixed-frequency operation | Enables <1-µH inductor selection and eliminates audible noise-critical for smartphone camera and audio subsystems. |
| Power-save mode at light load | Maintains >85% efficiency down to 1 mA load via pulse-skipping, extending battery life in display-off or sleep states. |
| 35-ns minimum on-time | Supports high step-down ratios (e.g., 5.4 V → 1.875 V) without pulse skipping, ensuring stable regulation at low duty cycles. |
| Integrated active power-down sequencing | Provides controlled output discharge via 30–50 Ω internal resistor (TPS6232x only)-not applicable to TPS62315YZR; omitted per datasheet. |
| 100% duty cycle capability | Allows dropout operation down to VOUT + 0.5 V (min 2.7 V), improving efficiency during battery end-of-discharge. |
Applications
| Smartphone Application | Bluetooth/WLAN Module Supply |
|---|---|
Use Scenario: Core voltage rail for ARM-based application processor in slim-profile smartphones operating from single-cell Li-Ion battery. IC Role / Device Role / Timing Role: Primary 1.875-V synchronous buck regulator delivering 500 mA peak current with 3-MHz switching for minimal filter size. Use Value: Enables 1-mm component profile solution using 1-µH inductor and 4.7-µF X5R ceramic capacitors-reducing PCB area by >40% vs. 1-MHz converters. | Use Scenario: Dedicated power rail for Bluetooth 5.0 and 2.4-GHz WLAN transceivers requiring low-noise, fast-transient response. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter synchronized to system clock via MODE/SYNC pin to avoid frequency beating. Use Value: Achieves <10-mV P-P ripple in PWM mode (MODE/SYNC = VIN) and <25-mV P-P in PFM mode-meeting RF IC PSRR requirements. |
| Digital Camera Image Sensor Bias | USB-Based DSL Modem Core Logic |
Use Scenario: Powering CMOS image sensor analog front-end and ISP core in compact digital cameras. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with 35-ns minimum on-time supporting 3.3 V → 1.875 V conversion during burst capture. Use Value: Delivers 93% peak efficiency at 300 mA, minimizing thermal rise near optical module-preventing focus drift. | Use Scenario: Core voltage supply for MIPS-based DSL modem SoC operating from USB 5-V bus with tight thermal constraints. IC Role / Device Role / Timing Role: Compact buck converter leveraging 3-MHz operation to fit within 8-mm × 8-mm module footprint. Use Value: Reduces required output capacitance by 60% vs. 500-kHz alternatives-lowering BOM cost and board space in cost-sensitive CPE designs. |
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 |
|---|---|---|---|
| TPS62313YZD | Fixed 1.8 V output (vs. 1.875 V), identical CSP-8 package, same 500-mA rating and 3-MHz operation. | Targeted for 1.8-V FPGA I/O banks or microcontroller peripherals where tighter voltage tolerance is acceptable. | Select when system requires exact 1.8 V rail and can tolerate ±0.5% regulation error instead of ±0.5%/+1.3%. |
| TPS62321DRC | QFN-10 package (3×3 mm), fixed 1.5 V output, same 500-mA/3-MHz specs but higher RθJA (49°C/W vs. 250°C/W). | Suitable for non-space-constrained industrial modules where thermal management via PCB copper is feasible. | Choose when board layout allows larger QFN footprint and thermal vias are available for heat dissipation. |
Compared with TPS62313YZD, the TPS62315YZR provides a 75-mV higher output ideal for 1.875-V DSP cores; versus TPS62321DRC, it offers 4× smaller footprint and superior thermal resistance in CSP-8-making it optimal for ultra-portable designs where board area and battery life are primary constraints.
Availability
TPS62315YZR is available at Aetrix Electronics and suitable for smartphone power management, Bluetooth/WLAN module supply, digital camera image sensor bias, and USB-based DSL modem core logic requiring stable component supply across high-volume production cycles.
Supply support for TPS62315YZR 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 energy-efficient IC design.
The TPS623xx family was engineered specifically for battery-powered portable electronics-delivering high-frequency, high-efficiency DC-DC conversion in ultra-small CSP and QFN packages to enable thinner, longer-lasting mobile devices.
FAQ
What is the output voltage accuracy of the TPS62315YZR over temperature?
The TPS62315YZR delivers ±0.5% DC voltage accuracy at 25°C and –0.5%/+1.3% over the full –40°C to +85°C operating range. This specification applies exclusively to the fixed 1.875 V output version and is measured under typical load conditions with proper PCB layout and decoupling.
Can the TPS62315YZR be synchronized to an external clock signal?
Yes, the TPS62315YZR supports on-the-fly synchronization to an external 3-MHz clock signal via the MODE/SYNC pin. When driven with a square wave (20–80% duty cycle) in the 2.65–3.35 MHz range, the P-channel MOSFET turn-on aligns to the falling edge of the external clock-enabling precise timing coordination across multiple converters.
What is the recommended inductor value for the TPS62315YZR in a typical smartphone application?
Texas Instruments recommends a 1-µH shielded power inductor (e.g., FDK MIPW3226 series) for the TPS62315YZR in smartphone applications. This value balances peak current handling, size, and efficiency-achieving >90% efficiency at 300 mA with 4.7-µF X5R output capacitors and 2.7–4.2 V input.
Is the ADJ pin used on the TPS62315YZR?
No, the ADJ pin is not used on the TPS62315YZR. As a fixed-output device, the ADJ pin must remain unconnected per the datasheet. Connecting it risks regulation instability or damage. Only adjustable versions (e.g., TPS62300, TPS62320) utilize this pin for external voltage programming.
What thermal derating applies to the TPS62315YZR in CSP-8 package?
The TPS62315YZR in CSP-8 (YZ package) has a junction-to-ambient thermal resistance (RθJA) of 250°C/W on a low-K 1-layer board. Its maximum allowable power dissipation decreases by 4 mW/°C above 25°C ambient, limiting continuous 500-mA operation to ≤400 mW at 85°C ambient without additional PCB copper thermal relief.
TPS62315YZR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-UFBGA, CSPBGA
- 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-CSP
TPS62315YZR FAQ
1.How can I place an order for TPS62315YZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS62315YZR 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 TPS62315YZR reliable?
The price and inventory of TPS62315YZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS62315YZR is usually 5 days.
3.What payment methods are accepted for TPS62315YZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS62315YZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS62315YZR?
TPS62315YZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS62315YZR 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 TPS62315YZR?
For technical support, including TPS62315YZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS62315YZR requirements.
6.How does Aetrix verify that TPS62315YZR is sourced from the original manufacturer or authorized distributors?
All TPS62315YZR 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 TPS62315YZR meets industry standards.
7.What is the process for return or replacement of TPS62315YZR?
All TPS62315YZR units undergo pre-shipment inspection (PSI). If there is an issue with TPS62315YZR, 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 TPS62315YZR part is unused and in its original packaging.
Return procedure for TPS62315YZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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