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Texas Instruments TPS65708YZHT
- Part No.:
- TPS65708YZHT
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 16-UFBGA, DSBGA
- Datasheet:
-
TPS65708YZHT.pdf
- Description:
- IC PMU EMBEDDED MOD 16DSBGA
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
TPS65708YZHT from Texas Instruments is a highly integrated power management unit (PMU) for embedded camera modules, featuring two 400-mA step-down converters (DCDC1 at 3.3 V, DCDC2 at 1.8 V), two 200-mA LDOs (VLDO1 at 2.8 V, VLDO2 at 1.2 V), and a 7.5-mA PWM-dimmable current sink for LED biasing. It operates from 3.6–6 V input, delivers up to 95% efficiency, and supports 180° out-of-phase switching to reduce input ripple.
For engineers reviewing the TPS65708YZHT datasheet, TPS65708YZHT pinout, TPS65708YZHT application, or TPS65708YZHT equivalent, key selection considerations include its fixed-output dual-buck architecture, integrated sequencing (DCDC1 → LDO1 → DCDC2 → LDO2), 2.25-MHz switching frequency, Power Save Mode (PFM) for light-load efficiency, and DSBGA-16 (2.0 × 2.0 mm, 0.5-mm pitch) packaging optimized for space-constrained camera modules.
Technical Context
The TPS65708YZHT employs voltage-mode PWM control with input voltage feed-forward for fast line/load regulation and supports automatic transition between fixed-frequency PWM mode (MODE = high) and discontinuous-conduction PFM mode (MODE = low) based on load current. Its 180° phase shift between DCDC1 and DCDC2 minimizes input RMS current and reduces capacitor stress.
Dynamic voltage positioning (+1% nominal output in PFM mode), internal soft-start (250 µs ramp), 100% duty-cycle operation for ultra-low dropout, and integrated UVLO (3.6 V threshold with 130 mV hysteresis) enable robust battery-powered operation. All outputs feature short-circuit protection and thermal shutdown (150°C, 30°C hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.6 V to 6 V - supports single-cell Li-ion or regulated 5 V/3.3 V rails without external pre-regulation. |
| DCDC1 Output | 3.3 V / 400 mA - fixed output for image sensor core logic or interface I/O; ±1.5% accuracy in PWM mode. |
| DCDC2 Output | 1.8 V / 400 mA - fixed output for digital baseband or processor cores; enables efficient low-voltage operation. |
| LDO1/LDO2 Outputs | 2.8 V / 1.2 V, each 200 mA - low-noise supplies for analog sensor blocks or reference circuits; PSRR ≥50 dB @10 kHz. |
| LED Current Sink | 7.5 mA PWM-dimmable - factory-programmed constant-current sink with 5%–100% duty cycle control via PWM pin. |
| Switching Frequency | 2.25 MHz (±10%) - enables use of compact 1.5 µH inductors and 4.7–10 µF ceramic capacitors for minimal footprint. |
| Quiescent Current | 200 µA (PFM mode, all outputs enabled) - extends battery life in always-on camera standby states. |
Pinout & Package
TPS65708YZHT is housed in a 16-ball DSBGA (YZH package), 2.00 mm × 2.00 mm body size, 0.5-mm ball pitch, bottom-side thermal pad design. Package supports automated assembly and provides low thermal resistance (RθJA = 75°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 (VLDO1) | LDO1 output | 2.8 V regulated supply for analog sensor circuitry; requires 2.2 µF output capacitor. |
| A2 (VINLDO1) | LDO1 input | Input rail for LDO1; must be ≥2.8 V + dropout (200 mV @200 mA) for regulation. |
| A3 (VINLDO2) | LDO2 input | Input rail for LDO2; shares input domain with VINLDO1 or can be independently sourced. |
| A4 (VLDO2) | LDO2 output | 1.2 V supply for low-voltage digital logic; low-noise output critical for ADC reference stability. |
| B1 (ISINK) | LED current sink output | Open-drain cathode driver; connects directly to LED anode via external current-setting resistor (if not using internal 7.5 mA). |
| B2 (PWM) | LED dimming control input | Accepts 50 kHz PWM signal (VIH ≥1.2 V); controls ISINK current duty cycle from 5% to 100%. |
| B3 (MODE) | Operating mode select | Pull low for automatic PFM/PWM transition; pull high to force fixed-frequency PWM across full load range. |
| B4 (VCC) | Internal reference supply | Must be connected to VIN1/VIN2; highest voltage rail on device; enables internal bias and UVLO monitoring. |
| C1 (VIN1) | DCDC1 input | 3.6–6 V input for first buck converter; requires 4.7 µF minimum input capacitance. |
| C2 (FB1) | DCDC1 feedback | Direct connection to VOUT1; no external divider - internal 1% accurate resistive network sets 3.3 V. |
| C3 (FB2) | DCDC2 feedback | Direct connection to VOUT2; internal divider fixes 1.8 V output; avoids external component count and tolerance drift. |
| C4 (VIN2) | DCDC2 input | Independent 3.6–6 V input for second buck converter; allows dual-input flexibility or redundancy. |
| D1 (PGND1) | DCDC1 power ground | Separate ground return for DCDC1 switch node; minimizes noise coupling into sensitive analog sections. |
| D2 (L1) | DCDC1 switch node | Connects to inductor L1; high dv/dt node requiring tight layout and Kelvin grounding for EMI control. |
| D3 (L2) | DCDC2 switch node | Connects to inductor L2; 180° phase-shifted relative to L1 to reduce input ripple current amplitude. |
| D4 (PGND2) | DCDC2 power ground | Separate ground return for DCDC2; maintains isolation between buck converter return paths. |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase buck operation | Reduces peak input current by ~30% and cuts input capacitor RMS current, enabling smaller 4.7 µF input caps. |
| Dynamic voltage positioning (+1%) | Maintains 3.31 V/1.82 V during light load to minimize undershoot at sudden load steps (e.g., sensor wake-up). |
| Integrated power-up sequencing | Factory-configured sequence DCDC1 → LDO1 → DCDC2 → LDO2 prevents back-powering and ensures stable boot. |
| Output discharge circuitry | Activates internal 300–550 Ω discharge resistors on L1/L2/VLDO1/VLDO2 when VCC drops below UVLO, ensuring safe reset. |
| 100% duty-cycle low-dropout mode | Extends usable battery range down to VIN ≈ VOUT + IOUT×(RDS(on) + LDCR), critical for end-of-discharge operation. |
Applications
| Embedded Camera Module Power | Mobile Device Flash LED Driver |
|---|---|
|
Use Scenario: Compact 5–13 MP camera module in smartphones or tablets requiring independent, low-noise, sequenced power rails for sensor, ISP, and flash. IC Role / Device Role / Timing Role: Single-chip PMU providing four regulated outputs with controlled startup timing and integrated LED current sink. Use Value: Eliminates need for discrete buck converters, LDOs, and LED drivers - reduces BOM count by ≥7 components and saves >15 mm² PCB area. |
Use Scenario: Synchronized flash illumination during still capture or video recording, with brightness control via host MCU PWM. IC Role / Device Role / Timing Role: Constant-current LED sink with direct PWM dimming interface and thermal foldback protection. Use Value: Delivers precise 7.5 mA drive with <±10% accuracy across temperature, eliminating external current-sense resistors and op-amps. |
| Portable Imaging System Bias | Low-Power Vision Sensor Hub |
|
Use Scenario: Battery-powered portable endoscope or barcode scanner needing clean analog supplies and efficient digital core power. IC Role / Device Role / Timing Role: Dual-buck + dual-LDO regulator delivering 3.3 V/1.8 V/2.8 V/1.2 V with <200 µA quiescent current in standby. Use Value: Achieves >90% efficiency at 10–100 mA loads via PFM mode, extending runtime beyond 8 hours on a 500 mAh cell. |
Use Scenario: Edge AI vision node with CMOS sensor, microcontroller, and local inference accelerator requiring tightly coupled, low-noise power domains. IC Role / Device Role / Timing Role: Sequenced power source with PSRR ≥50 dB on LDO outputs to preserve ADC SNR and clock jitter performance. Use Value: Maintains <160 µVRMS output noise (10 Hz–100 kHz) on VLDO1, enabling 12-bit sensor data integrity without additional filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail PMU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65136YFFR | Single 400-mA buck + dual 200-mA LDOs only; no LED sink; 2.5-MHz switching; 20-pin WQFN. | Lacks integrated current sink - requires external LED driver circuit for flash functionality. | Select when LED driving is handled separately and board space allows larger WQFN package. |
| RTQ2134B-WE | Dual 600-mA bucks + dual 300-mA LDOs; no integrated LED sink; 2.2-MHz; 20-pin QFN; higher IQ (350 µA). | Higher output current capability but no native PWM-dimmable sink - unsuitable for direct LED bias. | Choose for higher-current sensor/processor rails where flash is omitted or driven externally. |
Compared with TPS65708YZHT, TPS65136YFFR offers identical LDO/buck topology but omits the LED sink entirely, while RTQ2134B-WE increases current capacity at the cost of integration density and quiescent efficiency - neither matches the TPS65708YZHT's combined camera-optimized feature set in a 2.0 × 2.0 mm DSBGA.
Availability
TPS65708YZHT is available at Aetrix Electronics and suitable for embedded camera modules, mobile imaging systems, and portable vision sensors requiring stable component supply, long-term lifecycle support, and production-ready qualification.
Supply support for TPS65708YZHT 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 and precision power solutions.
The TPS65708YZHT belongs to TI's embedded camera PMU product line, designed specifically to consolidate power delivery, sequencing, and LED control into a single chip for space- and efficiency-constrained imaging subsystems.
FAQ
What is the default power-up sequencing order for the TPS65708YZHT?
The TPS65708YZHT implements factory-programmed sequencing: DCDC1 powers up first, followed by LDO1, then DCDC2, and finally LDO2. This order prevents back-powering of downstream circuitry and ensures stable initialization of sensor core logic before analog bias rails are established. The sequence is fixed and cannot be modified externally.
Does the TPS65708YZHT support adjustable output voltages for its DC-DC converters?
No, the TPS65708YZHT has fixed-output DC-DC converters: DCDC1 is permanently set to 3.3 V and DCDC2 to 1.8 V. Feedback pins FB1 and FB2 connect directly to their respective outputs with no external resistor dividers - the voltage references are trimmed internally during manufacturing to ±1.5% accuracy in PWM mode.
How does the MODE pin affect efficiency across load conditions in the TPS65708YZHT?
When MODE is pulled low, the TPS65708YZHT automatically enters Power Save Mode (PFM) at light loads (<~50 mA), reducing quiescent current to 200 µA and maintaining >85% efficiency. At heavier loads, it transitions seamlessly to fixed-frequency PWM mode (2.25 MHz) for tighter regulation and lower output ripple - optimizing efficiency across the full 0–400 mA range.
Can the TPS65708YZHT's LED current sink be reprogrammed to values other than 7.5 mA?
The default 7.5 mA sink current is factory-programmed via internal EEPROM. TI supports custom current settings (7.5–30 mA) upon request for volume orders, but field reprogramming is not supported. For designs requiring variable current, external current-sense feedback or a separate LED driver IC is required.
What thermal protection mechanisms are implemented in the TPS65708YZHT?
The TPS65708YZHT includes independent thermal shutdown for each DC-DC converter and LDO, triggering at 150°C junction temperature with 30°C hysteresis. When activated, all power FETs and regulators disable, and the device enters low-quiescent shutdown (≤15 µA). Recovery occurs only after junction temperature falls below 120°C and input voltage exceeds UVLO threshold.
TPS65708YZHT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-UFBGA, DSBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Handheld/Mobile Devices
- Current - Supply:
- 4mA
- Voltage - Supply:
- 1.7V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DSBGA (2.24x2.16)
TPS65708YZHT FAQ
1.How can I place an order for TPS65708YZHT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65708YZHT 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 TPS65708YZHT reliable?
The price and inventory of TPS65708YZHT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65708YZHT is usually 5 days.
3.What payment methods are accepted for TPS65708YZHT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65708YZHT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65708YZHT?
TPS65708YZHT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65708YZHT 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 TPS65708YZHT?
For technical support, including TPS65708YZHT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65708YZHT requirements.
6.How does Aetrix verify that TPS65708YZHT is sourced from the original manufacturer or authorized distributors?
All TPS65708YZHT 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 TPS65708YZHT meets industry standards.
7.What is the process for return or replacement of TPS65708YZHT?
All TPS65708YZHT units undergo pre-shipment inspection (PSI). If there is an issue with TPS65708YZHT, 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 TPS65708YZHT part is unused and in its original packaging.
Return procedure for TPS65708YZHT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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