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Texas Instruments TPS628603YCHR
- Part No.:
- TPS628603YCHR
- Manufacturer:
- Texas Instruments
- Package:
- 8-XFBGA, DSBGA
- Datasheet:
-
TPS628603YCHR.pdf
- Description:
- IC REG BUCK PROG 600MA 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,246
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Product details
Overview
TPS628603YCHR from Texas Instruments is a 0.6A synchronous step-down DC/DC converter with I²C and VSEL voltage selection interfaces, operating from 1.75V to 5.5V input and delivering 1.05V or 0.65V factory-preset outputs with ±1% accuracy and 2.3μA quiescent current - deployed in wearable electronics and medical sensor patches where ultra-low power and compact size are critical.
For engineers reviewing the TPS628603YCHR datasheet, TPS628603YCHR pinout, TPS628603YCHR application, or TPS628603YCHR equivalent, this page delivers verified electrical parameters, confirmed DCS-Control topology behavior, validated 8-pin WCSP package mapping, and two rigorously cross-referenced alternative parts for low-power point-of-load designs.
Technical Context
The TPS628603YCHR implements TI's DCS-Control architecture, combining hysteretic and voltage-mode regulation to achieve seamless PWM-to-PSM transition, fast load transient response, and stable operation with low-ESR ceramic capacitors. Its dual-control interface supports dynamic voltage scaling (DVS) via I²C register writes or real-time VSEL pin toggling between 1.05V and 0.65V outputs.
It operates at a fixed 1.5MHz switching frequency in FCCM mode, features integrated high-side (120–170mΩ) and low-side (80–115mΩ) MOSFETs, and includes undervoltage lockout (1.75V rising threshold), thermal shutdown (160°C), and output discharge via the VOS pin - all optimized for space-constrained battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 0.6A maximum continuous - supports low-power SoCs and sensors without external current boosting. |
| Input Voltage Range | 1.75V to 5.5V - compatible with single-cell Li-ion, Li-polymer, and 3.3V/5V rails. |
| Output Voltage Options | Factory-set 1.05V and 0.65V - selected dynamically via VSEL pin state (HIGH/LOW) during operation. |
| Quiescent Current | 2.3μA - enables multi-week battery life in always-on wearable and medical patch applications. |
| Switching Frequency | 1.5MHz - allows use of sub-1μH inductors and <6mm² total PCB area including 0201 passives. |
| Accuracy | ±1% over –40°C to +85°C - ensures reliable core voltage regulation for precision analog and RF subsystems. |
| Package | 8-pin DSBGA (YCH), 1.4mm × 0.7mm, 0.35mm pitch - supports ultra-thin (<0.6mm) portable form factors. |
Pinout & Package
TPS628603YCHR uses an 8-pin wafer-level chip-scale package (DSBGA, YCH), measuring 1.4mm × 0.7mm with 0.35mm pitch and optimized layout for 0201-size external components.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 1.75–5.5V supply; requires local 4.7μF ceramic capacitor for noise suppression. |
| GND | Ground reference | Primary return path for input/output capacitors and power stage; must be low-impedance. |
| SW | Switch node | Connects internal HS/LS FETs to external inductor; sensitive to layout parasitics and EMI. |
| VOS | Output voltage sense | Direct feedback connection to output capacitor; discharges VOUT when disabled via internal MOSFET. |
| EN | Enable control | Active-high logic input with internal 500kΩ pulldown; controls startup/shutdown sequencing. |
| VSEL | Voltage select | Real-time toggle between 1.05V (HIGH) and 0.65V (LOW); no external resistor required. |
| SCL | I²C clock | Open-drain input requiring external pullup; supports standard/fast/fast-plus modes up to 1MHz. |
| SDA | I²C data | Open-drain bidirectional line; shares bus with other I²C peripherals; requires pullup. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control topology | Enables <10μs load transient recovery and stable regulation with 10μF output capacitance. |
| Dual-interface DVS | Supports both I²C-programmable voltage steps (12.5mV increments) and hardware VSEL toggling. |
| Power-good (PG) indicator | Open-drain output confirms VOUT within ±7% of target; used for rail sequencing and fault detection. |
| Forced PWM mode | Configurable via I²C to eliminate PFM noise; maintains constant 1.5MHz switching under light loads. |
| Ultra-low shutdown current | 120–250nA at TJ = –40°C to +85°C - preserves battery charge during extended sleep states. |
Applications
| Wearable Fitness Tracker | Medical Sensor Patch |
|---|---|
Use Scenario: Continuous heart-rate monitoring with optical sensor and BLE SoC in wrist-worn form factor. IC Role / Device Role / Timing Role: Primary point-of-load regulator supplying 1.05V to sensor analog front-end and 0.65V to BLE radio during burst transmission. Use Value: 2.3μA IQ extends battery life beyond 14 days; 0.6mm height enables conformal fit against skin. |
Use Scenario: Disposable ECG patch transmitting biometric data every 5 minutes via low-power radio. IC Role / Device Role / Timing Role: Single-supply buck converter powering ultra-low-power MCU and analog signal chain from coin cell. Use Value: Factory-preset dual voltages eliminate external resistors; DCS-Control ensures stable VOUT during RF transmit spikes. |
| Portable Diagnostic Handheld | Smart Hearing Aid |
Use Scenario: Battery-powered ultrasound probe with embedded FPGA and ADC requiring clean, sequenced rails. IC Role / Device Role / Timing Role: Secondary regulator generating 0.65V for FPGA core and 1.05V for analog front-end from 3.3V intermediate rail. Use Value: PG signal coordinates startup with master controller; 1.5MHz switching avoids audible noise in diagnostic audio band. |
Use Scenario: Rechargeable hearing aid with adaptive gain control and Bluetooth LE streaming. IC Role / Device Role / Timing Role: Main power converter delivering dynamically scaled voltage to DSP core based on processing load. Use Value: VSEL pin toggles between 0.65V (idle) and 1.05V (streaming) without I²C overhead, reducing system latency. |
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 |
|---|---|---|---|
| TPS628610YCH | 1A output current, 4MHz switching, same 8-pin YCH package and I²C/VSEL interface. | Supports higher-current SoCs (e.g., Cortex-M7) but draws higher quiescent current (3.5μA typical). | Select when >0.6A load capability is required and board layout accommodates identical footprint. |
| TPS628601YCH | 0.6A output, dual VSEL pins (VSEL-1/VSEL-2), four factory presets (0.6/0.7/0.8/1.0V), no I²C. | Eliminates I²C routing complexity; suited for fixed-voltage, cost-sensitive wearables without software control. | Choose when firmware-based DVS is unnecessary and hardware-only voltage selection suffices. |
Compared with TPS628603YCHR, TPS628610YCH offers higher current and frequency at the expense of quiescent current, while TPS628601YCH removes I²C dependency but reduces voltage flexibility - making TPS628603YCHR optimal for firmware-controlled, dual-voltage, ultra-low-power systems.
Availability
TPS628603YCHR is available at Aetrix Electronics and suitable for wearable electronics, medical sensor patches, and portable diagnostics requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS628603YCHR 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 ICs, with decades of expertise in high-efficiency DC/DC conversion and low-power system design.
The TPS6286x product line was engineered specifically for space- and energy-constrained portable electronics, integrating DCS-Control, ultra-low IQ, and dual-interface DVS to enable next-generation wearables and medical devices.
FAQ
What is the default output voltage configuration of the TPS628603YCHR?
The TPS628603YCHR has two factory-preset output voltages: 1.05V when the VSEL pin is driven HIGH, and 0.65V when VSEL is driven LOW. These values are hard-coded in the device and require no external resistors or I²C initialization to function - enabling immediate dual-rail operation upon power-up.
Does the TPS628603YCHR support forced PWM mode, and how is it enabled?
Yes, the TPS628603YCHR supports forced PWM (FPWM) mode to suppress PFM noise and maintain constant 1.5MHz switching. It is enabled exclusively via the I²C CONTROL register (bit[7]); the VSEL pin alone cannot activate FPWM. Once set, FPWM remains active until explicitly cleared through I²C.
What is the role of the VOS pin on the TPS628603YCHR, and how must it be connected?
The VOS pin on the TPS628603YCHR serves as the output voltage feedback sense node and enables automatic VOUT discharge when the device is disabled. It must be connected directly to the output capacitor's positive terminal using the shortest possible trace - no series resistance or filtering - to ensure accurate regulation and rapid discharge to near 0V.
Can the TPS628603YCHR operate from a 1.8V input supply?
Yes, the TPS628603YCHR operates from 1.75V to 5.5V input, so 1.8V is within its valid range. However, at VIN = 1.8V, the achievable output current is reduced due to duty-cycle limitations and internal FET RDS(on) increase - refer to the "Recommended Operating Conditions" table for derated IOUT limits at low input voltages.
How does the power-good (PG) signal behave during dynamic voltage scaling on the TPS628603YCHR?
During VSEL toggling or I²C-triggered DVS transitions, the PG signal on the TPS628603YCHR goes LOW immediately upon VOUT deviation from its target threshold (±7%) and returns HIGH only after VOUT stabilizes within specification - with no blanking time. This provides precise, real-time status for system-level voltage coordination.
TPS628603YCHR 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:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.75V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.4V
- Voltage - Output (Max):
- 1.9875V
- Current - Output:
- 600mA
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DSBGA (0.66x1.36)
TPS628603YCHR FAQ
1.How can I place an order for TPS628603YCHR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628603YCHR 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 TPS628603YCHR reliable?
The price and inventory of TPS628603YCHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628603YCHR is usually 5 days.
3.What payment methods are accepted for TPS628603YCHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628603YCHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628603YCHR?
TPS628603YCHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628603YCHR 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 TPS628603YCHR?
For technical support, including TPS628603YCHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628603YCHR requirements.
6.How does Aetrix verify that TPS628603YCHR is sourced from the original manufacturer or authorized distributors?
All TPS628603YCHR 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 TPS628603YCHR meets industry standards.
7.What is the process for return or replacement of TPS628603YCHR?
All TPS628603YCHR units undergo pre-shipment inspection (PSI). If there is an issue with TPS628603YCHR, 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 TPS628603YCHR part is unused and in its original packaging.
Return procedure for TPS628603YCHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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