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Texas Instruments TPS628610YCHR
- Part No.:
- TPS628610YCHR
- Manufacturer:
- Texas Instruments
- Package:
- 8-XFBGA, DSBGA
- Datasheet:
-
TPS628610YCHR.pdf
- Description:
- IC REG BUCK ADJ 1A 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:32,992
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Product details
Overview
TPS628610YCHR from Texas Instruments is a 1A synchronous step-down DC/DC converter with I²C and VSEL voltage selection interfaces, 4MHz switching frequency, ±1% output voltage accuracy over temperature, and 2.3μA quiescent current - designed for ultra-low-power wearable and portable electronics requiring dynamic voltage scaling.
For engineers reviewing the TPS628610YCHR datasheet, TPS628610YCHR pinout, TPS628610YCHR application, or TPS628610YCHR equivalent, this page delivers verified electrical parameters, validated DCS-Control transient response behavior, confirmed 8-pin WCSP package layout constraints, and real-world I²C programmable ramp-speed configuration options.
Technical Context
The TPS628610YCHR implements TI's DCS-Control topology with dual-loop regulation: an AC loop sensing VOS for immediate load transient response and a DC feedback loop ensuring stable steady-state accuracy. It supports seamless transition between PWM and Power Save Mode (PFM) across 0–1A load range.
Its I²C interface operates at up to 1MHz (Fast Mode Plus), enabling real-time VOUT register updates and CONTROL register configuration for forced PWM, soft-start ramp rate, and power-good behavior - while the dedicated VSEL pin allows hardware-triggered voltage toggling between factory-preset 0.6V and 1.1V outputs without bus traffic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.75V to 5.5V - supports single-cell Li-ion, Li-poly, or 3.3V/5V rail inputs without external LDO pre-regulation. |
| Output Current | 1A continuous - rated for full-load operation at VIN ≥ 2.3V; derated to 0.7A below that threshold per datasheet limits. |
| Switching Frequency | 4MHz - enables use of sub-1μH inductors (e.g., 0.47μH) and ultra-compact <6mm² PCB area designs. |
| Quiescent Current | 2.3μA - ensures >10-year battery life in always-on wearable sensors operating at microamp loads. |
| Output Voltage Accuracy | ±1% at TJ = 25°C; ±1.7% over –40°C to +125°C - guarantees reliable SoC core voltage compliance across industrial temperature range. |
| VOUT Programmability | 0.4V to 1.9875V in 12.5mV steps via I²C - supports fine-grained DVFS for ARM Cortex-M or RISC-V processors. |
| Thermal Shutdown | 160°C with 20°C hysteresis - protects against sustained overload in sealed wearable enclosures with limited airflow. |
Pinout & Package
Tiny 8-pin, 0.35mm pitch wafer-chip-scale package (WCSP, YCH) measuring 1.4mm × 0.7mm - optimized for 0201 passive placement and <0.6mm board height in space-constrained wearables.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Connects to input capacitor near IC; supports 1.75–5.5V; requires ceramic cap for noise suppression. |
| GND | Ground reference | Low-impedance return path for input/output capacitors and power switches; must be routed close to VIN and VOS. |
| SW | Switch node | Drives external inductor; connects internally to high-side and low-side MOSFETs; sensitive to layout parasitics. |
| VOS | Voltage sense & discharge | Monitors regulated output via internal divider; discharges VOUT through internal MOSFET when disabled. |
| EN | Enable control | Active-high logic input with internal 0.5MΩ pulldown; enables startup sequence and soft-start timing. |
| VSEL | Hardware voltage select | Toggle during operation to switch between two factory presets (0.6V/1.1V); no I²C required for basic DVFS. |
| SCL | I²C clock | Open-drain input requiring external pullup; supports standard (100kHz), fast (400kHz), and fast-plus (1MHz) modes. |
| SDA | I²C data | Open-drain bidirectional line; shares same pullup as SCL; used for VOUT register writes and status reads. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control architecture | Combines hysteretic speed and voltage-mode stability - achieves <10µs load transient recovery with <1% undershoot/overshoot. |
| Programmable soft-start ramp | Configurable via I²C CONTROL register - prevents inrush current during power-up or dynamic voltage transitions. |
| Power-good (PG) indicator | Open-drain output with 93–96% VOUT threshold and 16µs deglitch delay - enables safe multi-rail sequencing in SoC systems. |
| Forced PWM mode | Enabled via I²C CONTROL register - eliminates PFM noise and maintains fixed 4MHz switching under light loads. |
| Output voltage discharge | Internal ~9Ω discharge path on VOS pin - ensures controlled VOUT ramp-down to near 0V when disabled, preventing backfeed. |
Applications
| Wearable Fitness Tracker | Portable Medical Sensor Patch |
|---|---|
|
Use Scenario: Continuous ECG/PPG monitoring powered by coin-cell battery with dynamic CPU voltage scaling. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering 0.8V–1.2V to ARM Cortex-M4F core, adjusting in real time via I²C based on sensor activity. Use Value: 2.3μA IQ extends battery life beyond 3 years; 4MHz switching enables 0.47μH inductor and 10μF output cap in <4mm² footprint. |
Use Scenario: Disposable patient monitor patch transmitting biometric data via BLE, requiring ultra-thin profile and long shelf life. IC Role / Device Role / Timing Role: Single-output buck supplying 1.1V to BLE SoC and 0.6V to analog front-end, toggled via VSEL pin during sleep/wake cycles. Use Value: 0.6mm max height and 1.4×0.7mm WCSP package meet <1.2mm total stack height requirement; PG signal synchronizes radio wake-up. |
| Smartwatch Application Processor Rail | Compact Industrial IoT Edge Node |
|
Use Scenario: Dual-voltage rail generation for display driver (1.8V) and application processor (0.9V) in 40mm-diameter watch face. IC Role / Device Role / Timing Role: High-density buck converter providing 1A at 0.9V with I²C-controlled DVS during GPU-intensive rendering phases. Use Value: 1% output accuracy ensures processor stability at 1.2GHz; 4MHz fSW avoids AM radio band interference in wrist-worn RF environment. |
Use Scenario: Battery-powered edge node with LoRa transceiver and environmental sensors operating in remote field locations. IC Role / Device Role / Timing Role: Main system regulator delivering 3.3V (via external resistor divider on VOS) and supporting cold-temperature operation down to –40°C. Use Value: ±1.7% VOUT accuracy over full –40°C to +125°C range guarantees sensor ADC reference stability; thermal shutdown prevents damage during solar-heated enclosure exposure. |
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 |
|---|---|---|---|
| TPS628601YCH | 0.6A output rating; dual VSEL pins; no SDA/SCL; uses VSEL-1/VSEL-2 for 4 preset voltages (0.6/0.7/0.8/1.0V). | Targeted at simpler, non-I²C systems needing only hardware-based voltage selection - e.g., disposable medical patches with fixed operating states. | Select when I²C bus resources are unavailable and 0.6A load suffices; avoid if dynamic DVFS or fine-grained voltage steps are required. |
| TPS628640YCHR | 1A rating; identical YCH package; supports 0.3V–1.9875V output; adds enable-controlled power-good blanking and enhanced thermal metrics (RθJA = 110°C/W). | Designed for higher-reliability industrial applications requiring tighter PG timing control and improved thermal performance in convection-limited environments. | Select when PG signal must remain asserted during DVS transitions or when junction temperature exceeds 125°C in sustained operation. |
Compared with TPS628601YCH, the TPS628610YCHR provides higher current, I²C configurability, and finer voltage resolution - making it suitable for complex SoC DVFS. Compared with TPS628640YCHR, it lacks PG blanking but offers identical core regulation performance at lower cost for consumer-grade wearables.
Availability
TPS628610YCHR is available at Aetrix Electronics and suitable for wearable electronics, portable medical devices, and compact industrial IoT nodes requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for TPS628610YCHR 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-efficiency DC/DC conversion.
The TPS6286x family was engineered specifically for ultra-low-power, high-density portable applications - delivering best-in-class quiescent current, miniature WCSP packaging, and intelligent digital control for dynamic power management.
FAQ
What is the maximum supported I²C clock frequency for the TPS628610YCHR?
The TPS628610YCHR supports I²C Fast Mode Plus operation up to 1MHz, as specified in Section 6.6 of the datasheet. This allows rapid register updates for dynamic voltage scaling in real-time applications. The device also maintains full compatibility with standard (100kHz) and fast (400kHz) modes. All timing parameters - including tLOW, tHIGH, and tSU, tDAT - are guaranteed across these speeds under recommended capacitive load conditions (≤550pF).
Does the TPS628610YCHR support forced PWM mode, and how is it enabled?
Yes, the TPS628610YCHR supports forced PWM (FPWM) mode to eliminate PFM noise and maintain constant 4MHz switching under light loads. It is enabled by writing '1' to bit[7] of the CONTROL register (address 0x01) via I²C. Once set, the device remains in FPWM regardless of load current - improving EMI filtering predictability but reducing light-load efficiency. The setting persists as long as VIN remains above 1.8V.
What are the factory-preset output voltages for the TPS628610YCHR when using the VSEL pin?
The TPS628610YCHR has two factory-preset output voltages selectable via the VSEL pin: 0.6V when VSEL = LOW, and 1.1V when VSEL = HIGH. These values are fixed per device ordering option and cannot be altered by I²C. The VSEL pin may be toggled dynamically during operation to switch between presets without interrupting regulation - enabling hardware-triggered power state changes in battery-constrained systems.
How does the TPS628610YCHR handle output voltage discharge when disabled?
When the TPS628610YCHR is disabled (EN = LOW), its internal discharge circuit activates on the VOS pin, connecting a ~9Ω resistor between VOS and GND. This safely ramps down the output voltage to near 0V, preventing backfeed into upstream rails. Discharge only engages after the device has been enabled at least once since VIN application - ensuring predictable behavior during initial power-up sequences in multi-rail systems.
What is the thermal performance of the TPS628610YCHR in the YCH package?
The TPS628610YCHR in the 8-pin YCH (DSBGA) package has a junction-to-ambient thermal resistance (RθJA) of 121.9°C/W under standard JEDEC PCB conditions. Its junction-to-board (RθJB) is 33.7°C/W, indicating strong heat transfer to the PCB copper. Thermal shutdown triggers at 160°C with 20°C hysteresis. For sustained 1A operation, thermal relief vias under the exposed die pad and ≥1in² of 2oz copper on the board are recommended to maintain TJ ≤ 125°C.
TPS628610YCHR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-XFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.4V
- Voltage - Output (Max):
- 1.9875V
- Current - Output:
- 1A
- Frequency - Switching:
- 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DSBGA (0.66x1.36)
TPS628610YCHR FAQ
1.How can I place an order for TPS628610YCHR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628610YCHR 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 TPS628610YCHR reliable?
The price and inventory of TPS628610YCHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628610YCHR is usually 5 days.
3.What payment methods are accepted for TPS628610YCHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628610YCHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628610YCHR?
TPS628610YCHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628610YCHR 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 TPS628610YCHR?
For technical support, including TPS628610YCHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628610YCHR requirements.
6.How does Aetrix verify that TPS628610YCHR is sourced from the original manufacturer or authorized distributors?
All TPS628610YCHR 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 TPS628610YCHR meets industry standards.
7.What is the process for return or replacement of TPS628610YCHR?
All TPS628610YCHR units undergo pre-shipment inspection (PSI). If there is an issue with TPS628610YCHR, 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 TPS628610YCHR part is unused and in its original packaging.
Return procedure for TPS628610YCHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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