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Texas Instruments TPS3610T50PWR
- Part No.:
- TPS3610T50PWR
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS3610T50PWR.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,825
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Product details
Overview
TPS3610T50PWR from Texas Instruments is a 5-V nominal supply-voltage supervisory IC with integrated backup-battery switchover, watchdog timer, power-fail comparator, and chip-enable gating. It provides active-low reset with 100-ms delay, battery-OK monitoring at 2.4 V threshold, and supports CMOS RAM data retention in portable equipment. Key confirmed parameters: VIT = 4.55 V (typ), watchdog timeout = 800 ms (typ), supply current = 40 µA (max), operating temperature = –40°C to 85°C, and 14-pin TSSOP package.
For engineers reviewing the TPS3610T50PWR datasheet, TPS3610T50PWR pinout, TPS3610T50PWR application, or TPS3610T50PWR equivalent, this page delivers verified functional roles, exact pin-level circuit behavior, real-world use cases in battery-backed systems, and validated alternative parts for supply-voltage supervision and RAM backup control.
Technical Context
The TPS3610T50PWR implements dual-supply supervision with automatic VDD-to-VBAT switchover when VDD falls below 4.55 V (typ), using a 15-Ω internal switch. Its watchdog logic resets on any WDI edge within 800 ms, and its dedicated PFI/PFO comparator monitors external rails against a 1.15-V reference with 12-mV hysteresis.
It features three independent output paths: RESET (100-ms fixed delay), CEOUT (3-ns propagation delay at 5 V), and BATTON (PMOS gate driver for external high-current switchover). The BATTOK output samples VBAT every 200 ms with 100-kΩ divider loading and 25-µs measurement window.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT Threshold | 4.46–4.64 V - precise reset activation point for 5-V systems, ensuring reliable brownout detection before critical voltage collapse |
| Watchdog Timeout | 480–1120 ms - configurable safety window for microcontroller firmware execution monitoring |
| RESET Delay | 100 ms (fixed) - guarantees full system initialization before release of processor reset signal |
| BATTOK Threshold | 2.33–2.47 V - accurate low-battery warning for 3.6-V lithium cells used in backup mode |
| Supply Current | 40 µA max - ultra-low quiescent draw enabling long-term operation in always-on battery-backed applications |
| VDD-to-VOUT rDS(on) | 0.6–1 Ω - minimal voltage drop during main supply mode, preserving system rail integrity under 300-mA load |
| VBAT-to-VOUT rDS(on) | 8–15 Ω - controlled impedance path for battery switchover, limiting inrush while sustaining RAM retention |
Pinout & Package
TPS3610T50PWR is housed in a 14-pin TSSOP (PW) package, 5.10 mm × 6.60 mm, lead pitch 0.65 mm, tape-and-reel only (R suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Power output | Switched supply rail delivered to CMOS RAM; connects to VDD or VBAT based on switchover state |
| VDD | Main supply input | Primary 5-V system rail input; triggers reset assertion when falling below 4.55 V |
| GND | Ground reference | Common return for all analog and digital functions; required for accurate threshold referencing |
| CEIN | Chip-enable input | Passes processor CE signal to CEOUT only when RESET is inactive; high-impedance during reset |
| MSWITCH | Manual switchover control | Forces immediate transition to battery-backup mode when pulled high; must be grounded if unused |
| PFI | Power-fail comparator input | Monitors external voltage via resistor divider; asserts PFO low when input drops below 1.15 V |
| PFO | Power-fail comparator output | Active-low flag indicating external supply failure; used for early warning or NMI generation |
| BATTOK | Battery status indicator | Open-drain output signaling VBAT > 2.4 V; sampled every 200 ms to minimize battery drain |
| BATTON | Battery switchover driver | Drives gate of external PMOS FET for high-current backup path; no series resistor needed |
| LOWLINE | Early power-fail warning | Asserts ~2% above VIT to provide nonmaskable interrupt before reset activation |
| WDI | Watchdog timer input | Edge-sensitive input; any transition within 800 ms prevents timeout-induced reset assertion |
| RESET | Reset output | Active-low open-drain reset signal with 100-ms delay; drives microcontroller /RESET pin |
| CEOUT | Chip-enable output | Controlled pass-through of CEIN; disabled during reset to prevent RAM corruption |
| VBAT | Backup battery input | Accepts 1.5–5.5 V backup source; enables switchover when VBAT > VDD and VDD < VIT |
Key Features
| Feature | Design Value |
|---|---|
| Battery freshness seal | Disables VBAT connection until first power-up, preserving shelf life of installed lithium backup cell |
| Chip-enable gating | 3-ns CEIN-to-CEOUT propagation at 5 V ensures compatibility with fast processors while blocking errant writes during undervoltage |
| Low-line comparator | Triggers LOWLINE output 2% above VIT to enable graceful shutdown before reset assertion |
| Manual switchover | Hardware-controlled MSWITCH pin allows deterministic entry into battery-backup mode without software intervention |
| Backup-battery switchover | 15-Ω internal switch connects VBAT to VOUT only when VDD < VIT and VBAT > VDD, preventing backfeed and optimizing efficiency |
Applications
| Portable Battery-Powered Equipment | Computer Equipment |
|---|---|
Use Scenario: Handheld medical monitors requiring persistent RAM storage during battery swaps or low-power sleep. IC Role / Device Role / Timing Role: Supervises 5-V main rail and switches CMOS RAM to 3.6-V lithium backup; asserts RESET before VDD drops below 4.55 V. Use Value: Ensures zero-data-loss RAM retention across power transitions with sub-100-µA standby current. | Use Scenario: Desktop motherboards using CMOS RAM for BIOS configuration with dual-supply redundancy. IC Role / Device Role / Timing Role: Generates 100-ms power-on reset, monitors +5-V rail for brownouts, and gates chip-enable to prevent memory corruption. Use Value: Eliminates need for discrete reset generator, PFI comparator, and CE buffer-reducing BOM count by 3 components. |
| Fax Machines | Automotive Systems |
Use Scenario: Fax machines storing dialing history and settings in nonvolatile RAM during AC power interruptions. IC Role / Device Role / Timing Role: Detects AC dropout via VDD sag, activates BATTON to drive external PMOS, and maintains VOUT from backup cell. Use Value: Enables seamless failover with <3-µs BATTON transition time, avoiding fax session loss during brief outages. | Use Scenario: Telematics control units retaining GPS log data and CAN message buffers during vehicle ignition cycling. IC Role / Device Role / Timing Role: Uses PFI to monitor 12-V battery via resistor divider; asserts PFO before VDD collapse to trigger emergency save routine. Use Value: Provides 12-mV hysteresis on PFI input to reject noise-induced false warnings in electrically noisy automotive environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision and battery switchover applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3610U18PWR | 1.8-V nominal VIT (1.71 V typ) vs. 4.55 V; BATTOK threshold 1.6 V vs. 2.4 V | Designed for 1.8-V systems with 3-V lithium backup; not suitable for 5-V rail supervision | Select only for low-voltage embedded designs where main supply is ≤2.0 V |
| MAX6361ESA+ | No battery switchover or BATTON output; single 5-V supervisor with 1.25% accuracy and 140-µA supply current | Lacks RAM backup control and manual switchover; limited to basic reset generation | Choose when only precision reset is needed and backup-battery functionality is handled externally |
Compared with TPS3610U18PWR and MAX6361ESA+, the TPS3610T50PWR uniquely integrates 5-V supervision, battery-OK monitoring, and high-current switchover drive in one 14-pin TSSOP-enabling complete RAM backup subsystems without external FETs or comparators.
Availability
TPS3610T50PWR is available at Aetrix Electronics and suitable for portable battery-powered equipment, computer equipment, fax machines, and automotive telematics systems requiring stable component supply and long-term lifecycle support.
Supply support for TPS3610T50PWR 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.
The TPS3610 family was designed specifically for systems requiring robust, integrated supervision of main and backup power domains-targeting portable, industrial, and automotive applications where RAM data retention during power loss is mission-critical.
FAQ
What is the exact reset threshold voltage for TPS3610T50PWR?
The TPS3610T50PWR has a guaranteed reset threshold voltage (VIT) of 4.46 V (min), 4.55 V (typ), and 4.64 V (max) over –40°C to 85°C. This 5-V nominal specification ensures reliable detection of brownout conditions in standard 5-V logic systems without requiring external resistor dividers.
Does TPS3610T50PWR support manual battery switchover?
Yes, TPS3610T50PWR supports manual switchover via the MSWITCH pin. When MSWITCH is pulled high to VDD, the device immediately disconnects VDD from VOUT and connects VBAT to VOUT-even if VDD remains above VIT. This enables deterministic, software-independent entry into battery-backup mode.
How does the battery freshness seal function in TPS3610T50PWR?
The battery freshness seal in TPS3610T50PWR isolates VBAT from internal circuitry until first power application. It requires grounding PFO and connecting PFI to VDD for 5–35 ms after VDD rises above VIT. The seal disables automatically on the rising edge of RESET, ensuring the backup battery remains fresh until initial system deployment.
Can TPS3610T50PWR drive an external PMOS transistor directly?
Yes, TPS3610T50PWR's BATTON output can directly drive the gate of a PMOS transistor without a current-limiting resistor. Its logic-high output pulls the FET gate to VOUT, turning on the device. The internal design accounts for gate capacitance and ensures clean turn-on/turn-off transitions under load.
What is the maximum continuous output current capability of TPS3610T50PWR's VOUT pin?
The TPS3610T50PWR VOUT pin supports up to 300 mA continuous output current in normal (VDD-mode) operation and up to 7.5 mA in battery-backup mode. These ratings are specified in the recommended operating conditions table and reflect safe thermal limits for sustained operation in the 14-pin TSSOP package.
TPS3610T50PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.4V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 60ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
TPS3610T50PWR FAQ
1.How can I place an order for TPS3610T50PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3610T50PWR 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 TPS3610T50PWR reliable?
The price and inventory of TPS3610T50PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3610T50PWR is usually 5 days.
3.What payment methods are accepted for TPS3610T50PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3610T50PWR transactions.
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4.How is shipping managed for TPS3610T50PWR?
TPS3610T50PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3610T50PWR 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 TPS3610T50PWR?
For technical support, including TPS3610T50PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3610T50PWR requirements.
6.How does Aetrix verify that TPS3610T50PWR is sourced from the original manufacturer or authorized distributors?
All TPS3610T50PWR 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 TPS3610T50PWR meets industry standards.
7.What is the process for return or replacement of TPS3610T50PWR?
All TPS3610T50PWR units undergo pre-shipment inspection (PSI). If there is an issue with TPS3610T50PWR, 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 TPS3610T50PWR part is unused and in its original packaging.
Return procedure for TPS3610T50PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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