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Texas Instruments TPS628604YCHR
- Part No.:
- TPS628604YCHR
- Manufacturer:
- Texas Instruments
- Package:
- 8-XFBGA, DSBGA
- Datasheet:
-
TPS628604YCHR.pdf
- Description:
- IC REG BUCK PROG 600MA 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:11,795
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Product details
Overview
TPS628604YCHR from Texas Instruments is a 0.6A synchronous step-down DC/DC converter with I²C and VSEL interface, operating from 1.75V to 5.5V input and delivering adjustable output from 0.4V to 1.9875V in 12.5mV steps. It features 2.3μA quiescent current, 1% output voltage accuracy, and 1.5MHz switching frequency - optimized for ultra-compact wearable and portable electronics requiring dynamic voltage scaling.
For engineers reviewing the TPS628604YCHR datasheet, TPS628604YCHR pinout, TPS628604YCHR application, or TPS628604YCHR equivalent, this page delivers verified technical context, validated pin functions, confirmed DCS-Control transient performance, real-world DVS ramp behavior, and two rigorously cross-checked alternative parts for low-power, space-constrained point-of-load designs.
Technical Context
The TPS628604YCHR implements TI's DCS-Control topology with dual feedback paths: an AC loop sensing VOS for immediate load transient response and a DC voltage feedback loop for precise regulation. Its seamless PFM/PWM mode transition maintains high efficiency across 100nA–600mA load range without external compensation.
It supports two independent voltage selection methods: hardware-based VSEL toggling (dual-pin logic for 0.85V/1.1V factory presets) and software-configurable I²C register writes (VOUT Register 1/2), enabling runtime DVS during active operation without interrupting power delivery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.75V to 5.5V - supports single-cell Li-ion, Li-polymer, and multi-cell alkaline/battery-backed systems without pre-regulation. |
| Output Current | 0.6A continuous - sufficient for ARM Cortex-M cores, BLE SoCs, and sensor hubs in wearables. |
| Quiescent Current | 2.3μA - enables >1-year battery life in always-on medical patches with microamp-level sleep currents. |
| Output Accuracy | ±1% at TJ = 25°C - ensures reliable core voltage compliance for processors requiring tight VDD tolerance. |
| Switching Frequency | 1.5MHz - allows use of 0.7–1.2μH inductors and <10mm² total solution size including 0201 passives. |
| DVS Resolution | 12.5mV steps from 0.4V to 1.9875V - matches granularity needed for fine-grained DVFS in MCU subsystems. |
| Package | 8-pin DSBGA (YCH), 1.4mm × 0.7mm, 0.35mm pitch - smallest footprint in TPS6286x family for ultra-thin form factors. |
Pinout & Package
TPS628604YCHR uses an 8-pin, 0.35mm-pitch wafer-chip-scale package (DSBGA, YCH) measuring 1.4mm × 0.7mm with bottom-side solder balls. The layout-optimized pinout supports 0201-size input/output capacitors and minimizes trace inductance for high-frequency stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Connects to 1.75–5.5V source; requires local 4.7μF ceramic capacitor for EMI suppression and transient response. |
| GND | Ground reference | Primary return path for power and control circuits; must be tied directly to PCB ground plane under IC. |
| SW | Power switch node | Drives external inductor; high dv/dt node requiring short, wide trace and separation from sensitive analog signals. |
| VOS | Output voltage sense | Direct connection to output capacitor; enables accurate regulation and internal discharge path when disabled. |
| EN | Enable control | Active-high logic input with internal 500kΩ pulldown; asserts soft-start on rising edge and initiates shutdown on falling edge. |
| VSEL | Hardware voltage select | Two-state pin toggling between 0.85V (LOW) and 1.1V (HIGH); changes output voltage dynamically during operation. |
| 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 bus with other I²C peripherals; must not float during operation. |
Key Features
| Feature | Design Value |
|---|---|
| DCS-Control architecture | Combines hysteretic speed and voltage-mode precision to achieve <10μs load transient recovery with <1% undershoot. |
| Dynamic Voltage Scaling (DVS) | Real-time output adjustment via I²C or VSEL pin - no power cycle required, enabling adaptive power management in firmware. |
| Ultra-low IQ operation | 2.3μA quiescent current extends battery life in always-on sensor nodes where sleep current dominates system budget. |
| Integrated output discharge | 7–11Ω internal resistor on VOS pin actively discharges output capacitor during disable, preventing floating rail issues. |
| Power-good (PG) indicator | Open-drain PG signal confirms ±3% output regulation and supports safe sequencing of downstream rails or fault detection. |
Applications
| Wearable Fitness Tracker | Portable Medical Sensor Patch |
|---|---|
Use Scenario: Continuous heart-rate monitoring with optical sensors and Bluetooth LE radio operating on coin-cell battery. IC Role / Device Role / Timing Role: Primary point-of-load regulator supplying 0.85V to MCU core and 1.1V to RF transceiver under dynamic DVS control. Use Value: 2.3μA IQ and 1.5MHz switching enable <1.2mm profile design with >14-day battery life and minimal EMI impact on analog front-end. |
Use Scenario: Single-use, adhesive ECG patch transmitting biometric data every 5 seconds over BLE. IC Role / Device Role / Timing Role: Dual-voltage source delivering 0.85V to ultra-low-power ADC and 1.1V to BLE SoC with synchronized VSEL-triggered state transitions. Use Value: Factory-preset dual voltages eliminate I²C overhead, reducing firmware complexity while maintaining <6mm² board area. |
| Smart Hearing Aid | Compact IoT Edge Node |
Use Scenario: Rechargeable in-ear device with voice processing, motion sensing, and audio amplification. IC Role / Device Role / Timing Role: Efficient buck converter powering DSP core (0.85V) and Class-D amplifier (1.1V) with load-dependent DVS via I²C. Use Value: Seamless PFM/PWM transition prevents audible switching noise during quiet periods while sustaining >90% efficiency at 100μA load. |
Use Scenario: Battery-powered environmental sensor node with LoRaWAN connectivity and multi-sensor fusion. IC Role / Device Role / Timing Role: Central power manager providing 0.85V to MCU and 1.1V to RF module, coordinated with wake-up timer events. Use Value: 1.4mm × 0.7mm YCH package fits within 12mm × 12mm PCB constraint; 0.35mm pitch compatible with standard SMT assembly. |
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 rating, dual-VSEL pins (VSEL-1/VSEL-2), no I²C interface, four factory presets (0.6/0.7/0.8/1.0V). | Used where I²C bus is unavailable or firmware simplicity is prioritized over programmable DVS resolution. | Select when fixed dual-voltage operation suffices and eliminating I²C routing reduces layout complexity. |
| TPS628610YCH | 1A output, 4MHz switching, same YCH package, identical I²C/VSEL interface but higher current capability. | Required for applications with peak loads >600mA (e.g., camera modules, motor drivers) while retaining same footprint. | Choose when future-proofing for higher current or faster transient response is needed without changing PCB layout. |
Compared with TPS628604YCHR, TPS628601YCH removes I²C flexibility for deterministic dual-voltage selection, while TPS628610YCH upgrades current and frequency at identical size - making both viable alternatives depending on whether firmware control or power headroom is the primary design constraint.
Availability
TPS628604YCHR is available at Aetrix Electronics and suitable for wearable electronics, portable medical devices, and compact IoT edge nodes requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for TPS628604YCHR 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 decades of expertise in high-efficiency DC/DC conversion for battery-powered systems.
The TPS6286x product line was designed specifically for ultra-low-power, space-constrained applications such as wearables and medical patches - emphasizing minimal IQ, sub-1mm height, and dynamic voltage adaptability without sacrificing regulation accuracy or transient response.
FAQ
What are the factory-preset output voltages for TPS628604YCHR?
The TPS628604YCHR has two factory-preset output voltages: 0.85V (when VSEL = LOW) and 1.1V (when VSEL = HIGH). These are hard-coded into the device and require no I²C programming - enabling immediate dual-voltage operation upon power-up or VSEL toggle during runtime.
Does TPS628604YCHR support forced PWM mode, and how is it enabled?
Yes, TPS628604YCHR supports forced PWM (FPWM) mode to minimize output voltage ripple. It is enabled exclusively via I²C by setting bit[7] of the CONTROL register to '1'. FPWM remains active until explicitly disabled or the device resets - it is not triggered by VSEL toggling or automatic load conditions.
What is the purpose of the VOS pin on TPS628604YCHR, and how must it be connected?
The VOS pin on TPS628604YCHR serves as the feedback sense node for the internal regulation loop and provides the discharge path for the output capacitor when the device is disabled. It must be connected directly to the output capacitor's positive terminal using the shortest possible trace - no resistors or RC networks - to ensure accurate regulation and reliable discharge behavior.
Can TPS628604YCHR operate with input voltage below 1.8V?
No - TPS628604YCHR incorporates undervoltage lockout (UVLO) with a rising threshold of 1.75V (max) and falling threshold of 1.7V (max). Operation below 1.75V causes automatic shutdown; the device will not regulate or deliver output current until VIN exceeds the UVLO threshold and completes soft-start.
What thermal protection features does TPS628604YCHR include?
TPS628604YCHR includes thermal shutdown at 160°C (typical junction temperature) with 20°C hysteresis. When triggered, both high-side and low-side FETs turn off completely. Recovery occurs only after junction temperature falls below ~140°C, followed by full soft-start - ensuring safe restart without latch-up or uncontrolled inrush.
TPS628604YCHR 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)
TPS628604YCHR FAQ
1.How can I place an order for TPS628604YCHR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628604YCHR 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 TPS628604YCHR reliable?
The price and inventory of TPS628604YCHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628604YCHR is usually 5 days.
3.What payment methods are accepted for TPS628604YCHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628604YCHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628604YCHR?
TPS628604YCHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628604YCHR 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 TPS628604YCHR?
For technical support, including TPS628604YCHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628604YCHR requirements.
6.How does Aetrix verify that TPS628604YCHR is sourced from the original manufacturer or authorized distributors?
All TPS628604YCHR 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 TPS628604YCHR meets industry standards.
7.What is the process for return or replacement of TPS628604YCHR?
All TPS628604YCHR units undergo pre-shipment inspection (PSI). If there is an issue with TPS628604YCHR, 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 TPS628604YCHR part is unused and in its original packaging.
Return procedure for TPS628604YCHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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