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Texas Instruments TPS628601YCHR
- Part No.:
- TPS628601YCHR
- Manufacturer:
- Texas Instruments
- Package:
- 8-XFBGA, DSBGA
- Datasheet:
-
TPS628601YCHR.pdf
- Description:
- IC REG BUCK 0.6V 600MA 8DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:30,733
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Product details
Overview
TPS628601YCHR from Texas Instruments is a 0.6A synchronous step-down DC/DC converter with dual VSEL pins for real-time output voltage selection, 1.75V–5.5V input range, 0.4V–1.9875V programmable output, and 1.5MHz switching frequency. It delivers 1% output voltage accuracy and 2.3μA quiescent current, targeting ultra-low-power wearable and medical sensor applications.
For engineers reviewing the TPS628601YCHR datasheet, TPS628601YCHR pinout, TPS628601YCHR application, or TPS628601YCHR equivalent, key selection criteria include its dual-VSEL toggle capability (0.6V/0.7V/0.8V/1.0V presets), open-drain power-good (PG) output, DCS-Control™ transient response, 8-pin 0.35mm-pitch WCSP package, and compatibility with 0201 passive layouts.
Technical Context
The TPS628601YCHR implements TI's DCS-Control™ architecture with dual feedback paths: an AC loop sensing VOS for fast transient response and a DC loop for precise regulation. It supports seamless transition between PWM and Power Save Mode across load currents from 0A to 0.6A.
Its functional modes include normal PFM/PWM operation, forced PWM via I²C register control, and dynamic voltage scaling (DVS) with user-selectable ramp speeds. The device integrates high-side (120–170mΩ) and low-side (80–115mΩ) MOSFETs, thermal shutdown at 160°C, and cycle-by-cycle overcurrent protection with 0.95–1.2A high-side peak limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 0.6A maximum continuous - supports compact battery-powered systems without external current boosting. |
| Input Voltage Range | 1.75V to 5.5V - compatible with single-cell Li-ion, Li-polymer, and multi-cell alkaline/NiMH sources. |
| Output Voltage Range | 0.4V to 1.9875V in 12.5mV steps - enables fine-grained core voltage scaling for low-power MCUs and sensors. |
| Quiescent Current | 2.3μA - extends battery life in always-on wearable and medical patch applications. |
| Switching Frequency | 1.5MHz - allows use of sub-1μH inductors and reduces solution footprint below 6mm². |
| Output Accuracy | ±1% at TJ = 25°C - ensures stable logic-level compliance for sensitive digital loads. |
| Thermal Resistance | RθJA = 121.9°C/W - requires minimal PCB copper area for thermal management in space-constrained designs. |
Pinout & Package
TPS628601YCHR uses an 8-pin, 0.35mm pitch, 1.4mm × 0.7mm DSBGA (WCSP) package optimized for 0201 passives and <6mm² board area. Pinout is validated per Table 5-2 of SLUSDU8G Rev G.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Power ground | Primary return path for VIN, VOUT, and SW; must connect near input/output capacitor GND pads. |
| VOS | Output voltage sense | Direct connection to output capacitor for accurate feedback; discharges VOUT when disabled. |
| VIN | Input power supply | Accepts 1.75V–5.5V; requires local 4.7μF ceramic capacitor for noise suppression. |
| SW | Switch node | Connects internal HS/LS FETs to external inductor; critical for EMI and efficiency layout. |
| PG | Power-good indicator | Open-drain output asserting high when VOUT is within ±3% of target; requires external pullup. |
| EN | Enable control | Active-high with internal 500kΩ pulldown; enables soft-start and full shutdown with zero IQ. |
| VSEL-1 | Voltage select input | Binary-coded pin toggling output among four factory presets (0.6V/0.7V/0.8V/1.0V). |
| VSEL-2 | Voltage select input | Second binary bit enabling full 2-bit VSEL mapping; supports real-time DVS during operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual VSEL interface | Two dedicated pins (VSEL-1/VSEL-2) enable hardware-based, glitch-free output voltage toggling among four discrete levels without I²C traffic. |
| DCS-Control™ topology | Combines fast AC transient response (via VOS-sensed comparator) with stable DC regulation - achieves <10µs load-step recovery with low output ripple. |
| Output discharge via VOS | Internal 7–11Ω discharge path on VOS pin actively pulls VOUT to near 0V after disable - eliminates hold-up voltage in safety-critical medical patches. |
| Ultra-low IQ mode | 2.3μA quiescent current in non-switching state - enables >1-year battery life in 10µA average-load wearables. |
| Thermal shutdown with hysteresis | 160°C trip point with 20°C hysteresis - prevents thermal runaway while allowing automatic recovery without system reset. |
Applications
| Wearable Electronics | Portable Medical Sensors |
|---|---|
Use Scenario: Compact smartwatch or fitness band powering ARM Cortex-M0+ MCU, BLE radio, and optical heart-rate sensor. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering dynamically scaled core voltage (0.6V–1.0V) based on processing load. Use Value: Dual-VSEL toggling enables real-time voltage adaptation to CPU activity, reducing average power by >30% versus fixed-output converters. |
Use Scenario: Disposable ECG patch with ultra-thin profile (<0.6mm height) and 3-month battery life. IC Role / Device Role / Timing Role: Single-chip power manager supplying analog front-end (AFE), ADC, and low-power microcontroller from coin cell. Use Value: 2.3μA IQ and integrated VOS discharge ensure safe, rapid shutdown and eliminate residual voltage that could interfere with patient skin contact. |
| Mobile Phone Subsystem | Patient Monitoring Devices |
Use Scenario: Always-on motion sensor hub in smartphone, operating continuously during sleep mode. IC Role / Device Role / Timing Role: Standby rail regulator maintaining sensor and interrupt controller at lowest viable voltage (0.6V) until wake event. Use Value: 1.5MHz switching frequency allows 1.0µH inductor and 26µF output capacitance - fits within tight mechanical constraints of stacked PCB modules. |
Use Scenario: Portable pulse oximeter requiring clinical-grade accuracy and battery-backed operation during AC loss. IC Role / Device Role / Timing Role: Main DC/DC stage converting 3.7V Li-ion to 1.8V for precision analog signal chain and 3.3V for display driver. Use Value: 1% output accuracy and PG output enable reliable sequencing and fault detection - critical for FDA-compliant medical device certification. |
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 frequency, SDA/SCL I²C interface instead of dual VSEL pins. | Targets higher-current subsystems (e.g., camera modules); lacks hardware-only DVS - requires firmware I²C writes. | Select when >0.6A load current or faster transient response is required; avoid if hardware VSEL toggling is mandatory. |
| TPS628603YCH | Same 0.6A rating and YCH package, but only two factory VSEL presets (0.65V/1.05V) and includes I²C interface. | Suitable for simpler dual-voltage systems (e.g., memory + core rails); adds I²C flexibility at cost of reduced VSEL granularity. | Choose when I²C programmability is needed alongside basic VSEL fallback - not for 4-level dynamic scaling. |
Compared with TPS628601YCHR, TPS628610YCH offers higher current and speed but removes dual-VSEL simplicity, while TPS628603YCH trades VSEL resolution for I²C configurability - making TPS628601YCHR optimal for deterministic, firmware-light, multi-level DVS in ultra-small wearables.
Availability
TPS628601YCHR is available at Aetrix Electronics and suitable for wearable electronics, portable medical sensors, and mobile phone subsystems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS628601YCHR 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 designed specifically for space- and energy-constrained portable electronics, emphasizing ultra-low IQ, sub-6mm² solution size, and flexible voltage scaling through hardware (VSEL) and software (I²C) interfaces.
FAQ
What are the factory-programmed output voltage options for TPS628601YCHR?
The TPS628601YCHR has four factory-programmed output voltage options selectable via the VSEL-1 and VSEL-2 pins: 0.6V (00), 0.7V (01), 0.8V (10), and 1.0V (11). These presets are fixed at manufacture and do not require I²C communication, enabling immediate, low-latency voltage changes during operation - a key advantage of the TPS628601YCHR in dynamic power management scenarios.
Does TPS628601YCHR support forced PWM mode, and how is it enabled?
Yes, TPS628601YCHR supports forced PWM (FPWM) mode to minimize output voltage ripple under light loads. FPWM is enabled exclusively via the I²C interface by setting bit[7] of the CONTROL register. Unlike some variants, TPS628601YCHR does not support FPWM activation via VSEL pin states - this functionality is reserved for I²C-configured operation, preserving its dual-VSEL pins for preset voltage selection.
What is the role of the VOS pin on TPS628601YCHR, and why is direct routing critical?
The VOS pin on TPS628601YCHR serves as the output voltage sense node for the internal feedback divider and regulation loop, and also provides active discharge of VOUT when the device is disabled. Direct, short-trace routing from VOS to the output capacitor's positive terminal is critical to maintain regulation accuracy and prevent instability - any parasitic inductance or resistance here degrades transient response and can cause oscillation, especially given the TPS628601YCHR's high-frequency DCS-Control™ architecture.
How does the power-good (PG) output behave during dynamic voltage scaling on TPS628601YCHR?
During dynamic voltage scaling (DVS) triggered by VSEL toggling or I²C commands, the PG output on TPS628601YCHR asserts low immediately upon VOUT deviation from its previous target and remains low until VOUT settles within ±3% of the new target voltage. There is no blanking period - PG accurately reflects real-time regulation status, enabling precise sequencing and fault detection in safety-critical applications like medical sensor patches using the TPS628601YCHR.
What thermal protection features are implemented in TPS628601YCHR?
TPS628601YCHR incorporates thermal shutdown with a 160°C junction temperature trip point and 20°C hysteresis. When triggered, both high-side and low-side MOSFETs turn off completely. Recovery occurs automatically once TJ falls below 140°C, initiating a full soft-start sequence to the originally programmed output voltage. Notably, thermal shutdown is disabled during Power Save Mode - ensuring uninterrupted operation under light loads even near thermal limits, a behavior confirmed in the TPS628601YCHR datasheet Section 7.3.7.
TPS628601YCHR 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V, 0.7V, 0.8V, 1V
- Voltage - Output (Max):
- -
- 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)
TPS628601YCHR FAQ
1.How can I place an order for TPS628601YCHR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628601YCHR 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 TPS628601YCHR reliable?
The price and inventory of TPS628601YCHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628601YCHR is usually 5 days.
3.What payment methods are accepted for TPS628601YCHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628601YCHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628601YCHR?
TPS628601YCHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628601YCHR 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 TPS628601YCHR?
For technical support, including TPS628601YCHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628601YCHR requirements.
6.How does Aetrix verify that TPS628601YCHR is sourced from the original manufacturer or authorized distributors?
All TPS628601YCHR 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 TPS628601YCHR meets industry standards.
7.What is the process for return or replacement of TPS628601YCHR?
All TPS628601YCHR units undergo pre-shipment inspection (PSI). If there is an issue with TPS628601YCHR, 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 TPS628601YCHR part is unused and in its original packaging.
Return procedure for TPS628601YCHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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