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Texas Instruments TPS65050RSMT
- Part No.:
- TPS65050RSMT
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
TPS65050RSMT.pdf
- Description:
- IC PWR MGMT 6CH W/4 LDO 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:250
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Product details
Overview
TPS65050RSMT from Texas Instruments is a 6-channel power-management IC integrating two 600-mA step-down DC-DC converters (for I/O and core rails) and four low-input-voltage LDOs (two 400-mA, two 200-mA), designed for single-cell Li-Ion/Li-Polymer systems in portable processors. It supports 2.25-MHz fixed-frequency PWM or light-load PFM operation, features digital voltage selection via DEFLDOx pins, and includes push-button ON/OFF control with 32-ms debounce.
For engineers reviewing the TPS65050RSMT datasheet, TPS65050RSMT pinout, TPS65050RSMT application, or TPS65050RSMT equivalent, key selection criteria include dual-buck current capability (600 mA each), LDO input range (1.5 V to 6.5 V), 2.25-MHz switching frequency, ±1% output accuracy in PWM mode, and support for external voltage programming of all DC-DC outputs.
Technical Context
The TPS65050RSMT implements two synchronous buck converters operating out-of-phase at 2.25 MHz with integrated high-side/low-side MOSFETs (rDS(on) ≤630 mΩ P-ch, ≤450 mΩ N-ch). Each converter has independent enable (EN_DCDC1/EN_DCDC2), feedback (FB_DCDC1/DEFDCDC2), and mode control (MODE pin selects PFM/PWM).
Four LDOs are digitally configurable via four DEFLDOx pins (DEFLDO1–DEFLDO4), supporting default voltage selection across LDO1–LDO4. The device lacks RESET functionality (unlike TPS65051/TPS65052) but includes PB_IN/PB_OUT for push-button sequencing with internal 32-ms debounce flip-flop.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| DC-DC Output Current | 2 × 600 mA - supports simultaneous I/O and core rail regulation in compact portable SoC designs |
| Switching Frequency | 2.25 MHz (±10%) - enables use of small external inductors (1.5–2.2 µH) and ceramic capacitors |
| LDO Output Current | 2 × 400 mA (LDO1/LDO2), 2 × 200 mA (LDO3/LDO4) - powers multiple low-noise analog/digital peripherals |
| Input Voltage Range | VINDCDC1/2: 2.5 V–6 V; VINLDOx: 1.5 V–6.5 V - compatible with single Li-ion battery (2.7–4.2 V) and post-regulated supplies |
| Output Accuracy | ±1% in PWM mode - ensures stable processor core/I/O voltage under dynamic load without calibration |
| Quiescent Current | 32–40 µA (both DC-DCs active, no LDOs enabled) - extends battery life in standby/sleep states |
| Thermal Resistance | RθJA = 37.3°C/W (VQFN-32) - requires minimal PCB copper area for thermal management at full load |
Pinout & Package
TPS65050RSMT uses a 32-pin VQFN package (4.0 mm × 4.0 mm, 0.5-mm pitch) with exposed thermal pad connected to AGND/PGND. Pin functions are fully defined per TI SLVS710C Rev C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply for internal logic and bias circuitry | Must be tied to same rail as VINDCDC1/2; powers EN, MODE, DEFLDOx, and FB comparators |
| EN_DCDC1 / EN_DCDC2 | Active-high enable inputs for buck converters | Enable/disable sequencing control; independent control allows staggered power-up of I/O and core rails |
| FB_DCDC1 / DEFDCDC2 | Feedback inputs for DC-DC regulation | FB_DCDC1 accepts external resistor divider for adjustable VDCDC1; DEFDCDC2 sets fixed VDCDC2 (1.0 V or 1.3 V) |
| EN_LDO1–EN_LDO4 | Active-high enable inputs for LDO regulators | Per-LDO enable allows fine-grained power domain control and dynamic rail shutdown |
| DEFLDO1–DEFLDO4 | Digital select inputs for LDO default output voltages | 4-bit binary code sets nominal LDO1–LDO4 output (e.g., 0000 = 1.2 V, 1111 = 3.3 V per TI Table 1) |
| PB_IN / PB_OUT | Push-button interface signals | PB_IN accepts mechanical button press; PB_OUT provides open-drain toggle signal for system reset/enable sequencing |
| VLDO1–VLDO4 | LDO output terminals | Deliver regulated outputs: VLDO1/VLDO2 = 400 mA max, VLDO3/VLDO4 = 200 mA max, PSRR ≥70 dB @ 10 kHz |
| VINDCDC1/2 | Common input for both buck converters | Shared input simplifies layout; must be decoupled with ≥10 µF ceramic capacitor near pin |
Key Features
| Feature | Design Value |
|---|---|
| 2.25-MHz synchronous buck operation | Enables <2.2 µH inductors and <22 µF output capacitance, reducing solution size by >40% vs lower-frequency PMICs |
| Independent enable/control per rail | Supports custom power sequencing (e.g., LDOs before DC-DCs) without external timing components |
| Digital LDO voltage selection | Four DEFLDOx pins configure all four LDO outputs in-system via GPIO or strapping resistors - no EEPROM required |
| Push-button ON/OFF with debounce | Internal 32-ms flip-flop eliminates need for external RC debouncing circuitry; PB_OUT directly drives EN_DCDCx |
| High PSRR LDOs (≥70 dB @ 10 kHz) | Suppresses switching noise from DC-DC converters, enabling clean analog/RF supply domains |
Applications
| Smartphone Baseband Power | OMAP™ Application Processor Supply |
|---|---|
Use Scenario: Single-cell Li-ion powered smartphone requiring separate, sequenced rails for baseband SoC, RF transceivers, and display interface. IC Role / Device Role / Timing Role: Central PMIC providing VDD_I/O (1.8 V), VDD_CORE (1.2 V), and four auxiliary LDOs for camera sensor, audio codec, SIM interface, and backlight driver. Use Value: Integrated dual-buck + quad-LDO eliminates six discrete regulators; 2.25-MHz operation minimizes EMI impact on cellular bands. |
Use Scenario: OMAP-L138 or OMAP3-based industrial HMI with real-time Ethernet, LCD, and USB peripherals. IC Role / Device Role / Timing Role: Primary power controller delivering 1.2-V core, 1.8-V memory, and 3.3-V I/O rails with programmable startup order and voltage selection. Use Value: DEFLDOx pins allow firmware-controlled LDO reconfiguration during runtime; PB_OUT enables hardware reset on power-loss detection. |
| Samsung S3C24xx System Power | Portable Media Player (PMP) Supply |
Use Scenario: Legacy ARM9-based handheld with S3C2440 CPU, NAND flash, SD card, and stereo audio DAC. IC Role / Device Role / Timing Role: Supplies VDD_ARM (1.3 V), VDD_IO (3.3 V), VDD_LCD (3.3 V), VDD_CAM (2.8 V), VDD_AUD (1.8 V), and VDD_NAND (3.3 V) from one battery. Use Value: Fixed 1.3-V/3.3-V DC-DC outputs match S3C24xx requirements; 400-mA LDOs handle peak audio DAC current without dropout. |
Use Scenario: Flash-based MP3/MP4 player with OLED display, touch controller, and stereo headphone amplifier. IC Role / Device Role / Timing Role: Generates 1.2-V core, 1.8-V codec, 2.8-V display, and 3.3-V USB PHY rails with independent enable for power gating unused subsystems. Use Value: 32-µA quiescent current extends playback time; high-PSRR LDOs prevent audible switching noise in headphone output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-management IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65054RSMT | Same 2×600-mA DC-DC architecture, but DCDC2 fixed at 1.05 V/1.3 V (selectable via DEFDCDC2); LDO voltages externally adjustable | Targeted at newer SoCs requiring precise 1.05-V core voltage; lacks PB_IN/PB_OUT - requires external reset IC | Select when 1.05-V core rail is mandatory and push-button control is handled elsewhere |
| TPS65056RSMT | DCDC1 fixed at 3.3 V (I/O rail), DCDC2 fixed at 1.0 V/1.3 V; LDO voltages externally adjustable; includes RESET output | Designed for systems needing fixed 3.3-V I/O with RESET assertion on undervoltage; no PB_IN/PB_OUT | Choose when RESET signaling is critical and 3.3-V I/O rail is non-negotiable; not suitable for push-button sequencing |
Compared with TPS65050RSMT, TPS65054RSMT offers tighter DCDC2 voltage options but removes push-button functionality, while TPS65056RSMT adds RESET but sacrifices PB_IN/PB_OUT and fixes DCDC1 - making TPS65050RSMT uniquely suited for button-initiated, self-contained power sequencing in space-constrained portable designs.
Availability
TPS65050RSMT is available at Aetrix Electronics and suitable for smartphone baseband power, OMAP™ application processor supply, and Samsung S3C24xx system power requiring stable component supply across high-mix, low-volume production runs.
Supply support for TPS65050RSMT 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in energy-efficient electronics.
The TPS6505x family was designed specifically for single-cell Li-ion/Li-polymer portable systems requiring tightly integrated, low-quiescent-current power rails for application processors, DSPs, and multimedia SoCs.
FAQ
What is the maximum output current supported by each DC-DC converter in the TPS65050RSMT?
The TPS65050RSMT supports up to 600 mA per DC-DC converter (DCDC1 and DCDC2). This rating applies across the full input voltage range (2.5 V to 6 V) and ambient temperature range (–40°C to 85°C), with thermal derating applied above 70°C ambient per the RθJA specification of 37.3°C/W.
Does the TPS65050RSMT include a RESET output function?
No, the TPS65050RSMT does not include a RESET output. Unlike the TPS65051, TPS65052, or TPS65056 variants, the TPS65050RSMT omits the THRESHOLD, HYSTERESIS, and RESET pins. Instead, it implements PB_IN and PB_OUT for push-button initiated power sequencing and reset, with internal 32-ms debounce logic.
How is the output voltage of the LDOs configured on the TPS65050RSMT?
The TPS65050RSMT uses four digital input pins - DEFLDO1 (LSB), DEFLDO2, DEFLDO3, and DEFLDO4 (MSB) - to set default output voltages for LDO1 through LDO4. These pins accept static logic levels (0 or 1) to select from predefined voltage options per TI's Table 1 (e.g., 0000 = 1.2 V, 1111 = 3.3 V), with no external feedback resistors required.
What is the purpose of the MODE pin on the TPS65050RSMT?
The MODE pin on the TPS65050RSMT selects between Power Save Mode (PFM at light loads, PWM at heavy loads) and forced PWM Mode. When MODE = GND, the device automatically enters PFM for highest efficiency below ~10 mA load; when MODE = VI, it operates exclusively in fixed-frequency PWM mode for predictable EMI and transient response.
Can the TPS65050RSMT operate with an input voltage below 2.5 V?
No, the TPS65050RSMT requires a minimum input voltage of 2.5 V on VINDCDC1/2 for guaranteed operation of both DC-DC converters, as specified in the Recommended Operating Conditions table. Operation below 2.5 V may result in undervoltage lockout (UVLO threshold = 1.8–2.0 V on VCC) or unstable regulation, and is outside the validated operating range.
TPS65050RSMT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Mobile/OMAP™
- Current - Supply:
- 1.25mA
- Voltage - Supply:
- 1.5V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VQFN (4x4)
TPS65050RSMT FAQ
1.How can I place an order for TPS65050RSMT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65050RSMT 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 TPS65050RSMT reliable?
The price and inventory of TPS65050RSMT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65050RSMT is usually 5 days.
3.What payment methods are accepted for TPS65050RSMT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65050RSMT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65050RSMT?
TPS65050RSMT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65050RSMT 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 TPS65050RSMT?
For technical support, including TPS65050RSMT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65050RSMT requirements.
6.How does Aetrix verify that TPS65050RSMT is sourced from the original manufacturer or authorized distributors?
All TPS65050RSMT 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 TPS65050RSMT meets industry standards.
7.What is the process for return or replacement of TPS65050RSMT?
All TPS65050RSMT units undergo pre-shipment inspection (PSI). If there is an issue with TPS65050RSMT, 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 TPS65050RSMT part is unused and in its original packaging.
Return procedure for TPS65050RSMT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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