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Texas Instruments TPS2074DB
- Part No.:
- TPS2074DB
- Manufacturer:
- Texas Instruments
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
TPS2074DB.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:4 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:180
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Product details
Overview
TPS2074DB from Texas Instruments is a four-port USB hub power controller IC without integrated 3.3-V LDO, implementing independent N-channel high-side power switches for bus- and self-powered operation, thermal/short-circuit protection, and BP/SP autoswitching logic. It supports USB 1.1/2.0 compliance in 24-pin SSOP (DB) package with –40°C to 85°C ambient range and 4.5–5.5 V BP input.
For engineers reviewing the TPS2074DB datasheet, TPS2074DB pinout, TPS2074DB application, or TPS2074DB equivalent, key selection considerations include BPMODE polarity (active-low for TPS2074), dual-mode supply switching behavior, per-port current limits (100 mA bus-powered / 500 mA self-powered), PG_DLY programmable delay, and absence of internal 3.3-V regulator - requiring external LDO if hub controller supply is needed.
Technical Context
The TPS2074DB integrates eight independent N-channel MOSFET high-side switches (four BP-to-OUTx, four SP-to-OUTx), each with current limiting and thermal shutdown. Its control logic monitors BP and SP voltages against UVLO thresholds (BP start: 4.25 V; SP start: 4.5 V) and uses BP_DIS to enable/disable automatic switchover between bus- and self-powered modes.
BPMODE output is active-low for TPS2074DB, signaling bus-powered mode; DP0_RST provides synchronized hub reset via 1.5-kΩ pullup; PG_DLY sets power-good and DP0_RST timing via external capacitor; and OC1–OC4 deliver active-low overcurrent flags per port with 1–10 ms response delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Input Range | 4.5 V to 5.5 V on BP pin; 0 V to 5.5 V on SP pin - enables dual-source USB hub power architecture |
| Port Current Limits | 100 mA (bus-powered mode, BP→OUTx); 500 mA (self-powered mode, SP→OUTx) - meets USB 2.0 downstream port requirements |
| rDS(on) Typ. | 500 mΩ (BP switch, 25°C); 100 mΩ (SP switch, 25°C) - determines voltage drop and thermal dissipation under load |
| Operating Temp. | –40°C to +85°C ambient - suitable for industrial and embedded USB hub applications |
| Quiescent Current | 175–240 µA at BP (switches disabled) - minimizes bus power consumption in idle state |
| UVLO Thresholds | BP stop: 3.75 V; SP stop: 4.0 V - ensures clean power sequencing and prevents brownout operation |
| PG Delay Range | Adjustable via PG_DLY capacitor (e.g., 190 ms with 0.47 µF) - synchronizes hub controller reset timing |
Pinout & Package
TPS2074DB is housed in a 24-pin SSOP (DB) package with exposed pad (no thermal pad connection specified), 0.635 mm pitch, and JEDEC MO-153 compliant outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PG_DLY (1) | Timing control input | Connects to external capacitor to set PG and DP0_RST pulse widths; 1.22 V reference, 3 µA charge current |
| EN1–EN4 (2,11,13,14) | Active-low enable inputs | Individually control each port's power switch; TTL/CMOS compatible; require 3.3V_OUT stable before activation |
| AGND (3), DGND (12) | Analog/digital ground | Separate ground paths minimize noise coupling between analog regulation and digital switching logic |
| PG (4) | Power-good output | Active-low open-drain signal indicating stable 3.3V_OUT; used as hub controller reset |
| SP (5,6) | Self-power supply input | Dual pins for low-impedance connection to local 5-V supply; enables 500-mA per-port operation |
| 3.3V_OUT (8) | LDO output | Unregulated 3.3-V output (no internal LDO - differs from TPS2070/TPS2071); requires external regulator for hub controller |
| BPMODE (9) | Bus/self-power mode indicator | Active-low output: low = bus-powered mode, high = self-powered mode - specific to TPS2074DB variant |
| DP0_RST (10) | Upstream hub reset signal | Drives DP0 line via 1.5-kΩ resistor; provides clean attach/detach signaling with adjustable timing |
| OC1–OC4 (15–18) | Overcurrent flag outputs | Active-low open-drain signals per port; remain asserted until fault condition clears |
| OUT1–OUT4 (19–22) | Power switch outputs | Four independent high-side switched 5-V outputs for downstream USB ports |
| BP (23) | Bus power input | Connects to USB VBUS; powers internal logic and enables 100-mA per-port bus-powered operation |
| BP_DIS (24) | Autoswitch disable input | Active-high logic input; when high, disables automatic fallback to bus power upon SP loss |
Key Features
| Feature | Design Value |
|---|---|
| Independent bus- and self-powered port control | Enables hybrid hub designs with seamless failover: SP loss triggers BP takeover only if BP_DIS = low |
| Programmable power-good timing | PG_DLY pin allows precise tuning of PG and DP0_RST delays using external capacitor - critical for USB enumeration timing |
| Per-port overcurrent detection with latch-off | OC1–OC4 provide dedicated fault signaling per downstream port; no shared trip mechanism preserves other ports during single-port overload |
| Low quiescent current in disabled state | 175–240 µA BP supply current with all ENx high - extends battery life in portable bus-powered hubs |
| UVLO with hysteresis on BP and SP | 300 mV hysteresis prevents oscillation near threshold; ensures robust startup/shutdown across temperature (–40°C to 85°C) |
Applications
| USB Bus-Powered Hub | Hybrid USB Hub |
|---|---|
Use Scenario: Compact desktop or travel hub drawing power solely from host USB port, supporting up to four low-power peripherals. IC Role / Device Role / Timing Role: TPS2074DB acts as primary power manager, enabling/disabling each downstream port via EN1–EN4 and signaling overcurrent via OC1–OC4. Use Value: Delivers regulated 5-V outputs at ≤100 mA/port while meeting USB 2.0 bus-powered current limits and providing clean DP0_RST attach signaling. | Use Scenario: Industrial docking station with local 5-V supply but retaining USB host backup capability. IC Role / Device Role / Timing Role: TPS2074DB manages dual-supply routing: SP powers ports at 500 mA/port; BP automatically engages if SP fails (BP_DIS = low). Use Value: Ensures uninterrupted peripheral connectivity during AC power loss without firmware intervention or manual reconfiguration. |
| USB Peripheral Controller Board | Embedded USB Host Interface |
Use Scenario: Microcontroller-based device (e.g., USB-to-serial adapter) requiring multiple downstream USB ports for daisy-chained peripherals. IC Role / Device Role / Timing Role: TPS2074DB provides isolated, current-limited 5-V power to each port while feeding BPMODE to MCU for runtime power-mode awareness. Use Value: Enables software-controlled port power cycling and real-time mode detection (bus vs. self) without external level-shifting or monitoring circuitry. | Use Scenario: Medical or test equipment with embedded USB host functionality needing reliable, standards-compliant port power management. IC Role / Device Role / Timing Role: TPS2074DB serves as certified USB power delivery interface, enforcing current limits, thermal protection, and PG-synchronized reset for connected devices. Use Value: Guarantees USB specification compliance (1.1/2.0), prevents backfeed via diode-free N-FET topology, and supports safe hot-plug operation across operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB hub power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2075DB | BPMODE is active-high (vs. active-low in TPS2074DB); identical pinout, timing, and electrical specs otherwise | Requires inverted logic handling in hub controller firmware for mode detection | Select TPS2075DB only when firmware expects active-high BPMODE or when replacing legacy TPS2075DB designs |
| TPS2071DAP | 32-pin HTSSOP with integrated 3.3-V/100-mA LDO; active-high BPMODE; wider thermal margin (–40°C to 85°C same, but higher power rating) | Eliminates need for external 3.3-V regulator; larger footprint; not pin-compatible | Choose TPS2071DAP when hub controller supply must be generated on-board and PCB layout allows 32-pin package |
Compared with TPS2075DB, TPS2074DB offers identical functionality except BPMODE polarity - critical for firmware compatibility. Against TPS2071DAP, TPS2074DB trades integrated LDO and thermal headroom for smaller SSOP footprint and lower BOM count where external 3.3-V supply exists.
Availability
TPS2074DB is available at Aetrix Electronics and suitable for USB hub designs, embedded host interfaces, and industrial docking stations requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for TPS2074DB 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 specializing in analog, embedded processing, and connectivity technologies with broad industrial and communications portfolio.
The TPS207x family targets USB-compliant power distribution in hub and peripheral applications, emphasizing dual-supply flexibility, fault resilience, and minimal external component count for cost-sensitive designs.
FAQ
What is the key functional difference between TPS2074DB and TPS2075DB?
The sole functional difference is BPMODE output polarity: TPS2074DB asserts BPMODE low during bus-powered operation, while TPS2075DB asserts it high. All other electrical characteristics, pinout, timing, and protection features are identical. Firmware must read BPMODE state accordingly - no hardware changes are needed beyond logic interpretation.
Does TPS2074DB include an integrated 3.3-V regulator for the USB hub controller?
No, TPS2074DB does not include an integrated 3.3-V LDO. The 3.3V_OUT pin is unregulated and requires an external 3.3-V regulator (e.g., TPS73xx series) to power the hub controller. This distinguishes TPS2074DB from TPS2070/TPS2071, which integrate a 3.3-V/100-mA LDO.
How does the BP_DIS pin affect TPS2074DB operation?
When BP_DIS is pulled high, TPS2074DB disables automatic switchover from self-powered to bus-powered mode - if SP drops below UVLO, outputs remain off. When BP_DIS is low or grounded, TPS2074DB enables autoswitching: loss of SP triggers immediate engagement of BP to maintain port power, provided BP is valid.
What is the maximum continuous current per port supported by TPS2074DB?
TPS2074DB supports 500 mA per port in self-powered mode (SP→OUTx) and 100 mA per port in bus-powered mode (BP→OUTx). These values are defined by static rDS(on) limits (100 mΩ SP switch, 500 mΩ BP switch) and thermal design margins - exceeding them risks thermal shutdown or voltage droop.
Can TPS2074DB be used in a purely bus-powered USB hub without any external 5-V supply?
Yes, TPS2074DB can operate in purely bus-powered mode: connect SP pins to GND or leave floating (per datasheet), tie BP_DIS low to allow autoswitching (though unused), and drive EN1–EN4 low to enable ports. All four ports will then deliver up to 100 mA each from VBUS, satisfying USB 2.0 bus-powered hub requirements.
TPS2074DB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Type:
- USB Switch
- Number of Outputs:
- 4
- Ratio - Input:Output:
- 1:4
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 4.5V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 100mA
- Rds On (Typ):
- 100mOhm
- Input Type:
- -
- Features:
- Power Good, Status Flag
- Fault Protection:
- Over Temperature
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
TPS2074DB FAQ
1.How can I place an order for TPS2074DB through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2074DB 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 TPS2074DB reliable?
The price and inventory of TPS2074DB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2074DB is usually 5 days.
3.What payment methods are accepted for TPS2074DB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2074DB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2074DB?
TPS2074DB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2074DB 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 TPS2074DB?
For technical support, including TPS2074DB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2074DB requirements.
6.How does Aetrix verify that TPS2074DB is sourced from the original manufacturer or authorized distributors?
All TPS2074DB 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 TPS2074DB meets industry standards.
7.What is the process for return or replacement of TPS2074DB?
All TPS2074DB units undergo pre-shipment inspection (PSI). If there is an issue with TPS2074DB, 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 TPS2074DB part is unused and in its original packaging.
Return procedure for TPS2074DB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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