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Texas Instruments TPS3600D50PW
- Part No.:
- TPS3600D50PW
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS3600D50PW.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,510
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Product details
Overview
TPS3600D50PW from Texas Instruments is a battery-backup supervisor IC designed for low-power processors, providing precision 5.0 V supply monitoring (VIT = 4.40 V typ), 800-ms watchdog timer, 100-ms power-on reset delay, and automatic switchover to backup battery when VDD fails. It supports manual switchover, chip-enable gating with ≤3 ns propagation delay at 5 V, and operates across –40°C to 85°C in portable battery-powered equipment.
For engineers reviewing the TPS3600D50PW datasheet, TPS3600D50PW pinout, TPS3600D50PW application, or TPS3600D50PW equivalent, key selection considerations include its 5.0 V threshold accuracy, dual-supply switchover logic (VDD/VBAT), BATTOK battery-status output with 7% hysteresis above VIT, and CEIN-to-CEOUT signal gating for CMOS RAM protection during brownout.
Technical Context
The TPS3600D50PW integrates independent voltage supervision (VIT = 4.40 V), watchdog timer (ttout = 0.8 s), and dual-path power routing (VDD→VOUT and VBAT→VOUT via 2 Ω switches). Its switchover logic activates VBAT only when VOUT falls below VSWN (≈4.44–4.53 V) and VBAT > VDD, preventing premature battery discharge.
It features a dedicated PFI/PFO comparator (1.15 V reference), BATTON output capable of driving external PMOS pass transistors, and battery freshness seal mode activated by grounded PFO/MR during power-down. The CE transmission gate disables during RESET assertion to isolate CMOS RAM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT Threshold | 4.40 V typical; precise 5.0 V supply monitoring with ±1.5% variation over temperature |
| Watchdog Timeout | 0.8 s typical; ensures microprocessor program execution integrity in embedded systems |
| Reset Delay | 100 ms fixed; guarantees stable power-up before processor release |
| VBOK Threshold | 4.56–4.86 V (VIT + 7%); battery OK detection with hysteresis prevents chatter |
| IDD Supply Current | 40 µA max; ultra-low quiescent current extends battery life in backup mode |
| rDS(on) | 1–2 Ω (VDD→VOUT and VBAT→VOUT); low-loss power path enables ≥200 mA continuous output |
| Operating Temp | –40°C to 85°C; qualified for industrial and automotive environments |
Pinout & Package
TPS3600D50PW uses a 14-pin TSSOP (PW) package (5.10 mm × 6.60 mm), surface-mount, lead-free compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Main power output | Supplies processor/core logic; sourced from VDD or VBAT depending on switchover state |
| VBAT (Pin 14) | Backup battery input | Accepts 1.5–5.5 V battery; connects to VOUT only when VDD fails and VBAT > VDD |
| VDD (Pin 2) | Primary supply input | 1.65–5.5 V main rail; powers internal circuitry and enables VDD→VOUT path |
| GND (Pin 3) | Ground reference | Common return for all analog/digital functions; critical for accurate threshold sensing |
| MSWITCH (Pin 4) | Manual switchover control | Logic-high forces immediate battery-backup mode; must be grounded if unused |
| CEIN (Pin 5) | Chip-enable input | Passes through to CEOUT when RESET inactive; high-impedance during reset to protect RAM |
| PFI (Pin 7) | Power-fail comparator input | Monitors auxiliary rails via external resistor divider; compares to 1.15 V internal reference |
| PFO (Pin 8) | Power-fail comparator output | Active-low flag indicating auxiliary supply drop below VPFI; used for freshness seal activation |
| BATTOK (Pin 9) | Battery status indicator | Open-drain output pulsed every 200 ms; low when VBAT < VBOK (4.56 V min) |
| CEOUT (Pin 10) | Chip-enable output | Controlled replica of CEIN; gated during reset to prevent memory corruption |
| MR (Pin 11) | Manual reset input | Active-low asynchronous reset; debounced internally; overrides all supervision logic |
| WDI (Pin 12) | Watchdog timer input | Edge-triggered (rising/falling); must toggle within 0.8 s to prevent timeout-induced reset |
| RESET (Pin 13) | Reset output | Active-low open-drain output; asserts for 100 ms after power-up or brownout recovery |
| BATTON (Pin 6) | Battery switchover driver | Drives external PMOS gate directly; high when VOUT sourced from VBAT; no series resistor needed |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low 40 µA supply current | Extends shelf life and runtime of backup batteries in long-term monitoring applications |
| Automatic VDD/VBAT switchover | Seamlessly transfers load without reset assertion-critical for real-time clock and RAM retention |
| Integrated 100-ms power-on reset generator | Eliminates need for external RC timing components; ensures deterministic system initialization |
| Chip-enable signal gating (≤3 ns delay) | Prevents data corruption in CMOS RAM during under-voltage conditions without adding latency |
| Battery freshness seal mode | Disables VBAT connection until first power-up, preserving battery charge for end-user deployment |
| Dual-threshold BATTOK monitoring | Provides reliable battery health indication with 7% hysteresis to avoid false low-battery alarms |
Applications
| Portable Medical Monitors | Fax Machines |
|---|---|
|
Use Scenario: Long-duration patient vitals logging powered by primary supply with lithium backup. IC Role / Device Role / Timing Role: Supervises 5.0 V main rail, triggers switchover to 3.6 V Li-cell upon AC loss, maintains RTC and SRAM. Use Value: Enables >72-hour continuous operation without reset interruption or data loss during power transitions. |
Use Scenario: Fax machine with volatile memory storing dialing history and settings. IC Role / Device Role / Timing Role: Provides 100-ms POR delay and CE gating to protect memory during brownouts. Use Value: Prevents memory corruption during brief line voltage sags common in office environments. |
| Point-of-Sale Terminals | Automotive Infotainment Systems |
|
Use Scenario: Retail terminal using flash memory and real-time clock with coin-cell backup. IC Role / Device Role / Timing Role: Monitors 5.0 V system rail, asserts RESET on failure, and drives BATTON for external PMOS switchover. Use Value: Guarantees transaction integrity and clock continuity during unexpected power disconnects. |
Use Scenario: Head unit retaining configuration and clock during vehicle ignition cycling. IC Role / Device Role / Timing Role: Supervises 5.0 V domain, detects battery voltage sag, and enables seamless VBAT fallback. Use Value: Eliminates reinitialization delays and preserves user preferences across engine start-stop cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery-backup supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3619-50PW | Lower 15 µA IDD, same 5.0 V VIT, no watchdog timer, no PFI/PFO | Suitable where ultra-low standby current is critical but watchdog and auxiliary monitoring are unnecessary | Choose TPS3619-50PW for cost-sensitive, non-safety-critical backup-only applications without program execution monitoring |
| MAX6361CSA+T | 5.0 V VTH, 1.6 µA IDD, no battery switchover, no CE gating, no BATTON output | Designed for simple reset generation only-lacks integrated backup power management | Choose MAX6361CSA+T only when supervisory function is limited to POR/reset; requires external circuitry for battery backup |
Compared with TPS3600D50PW, TPS3619-50PW reduces supply current by 75% but removes watchdog and auxiliary monitoring, while MAX6361CSA+T offers minimal current draw but lacks all battery-handling features-making TPS3600D50PW uniquely suited for integrated backup-power systems requiring switchover, CE protection, and battery health monitoring.
Availability
TPS3600D50PW is available at Aetrix Electronics and suitable for portable medical monitors, point-of-sale terminals, fax machines, and automotive infotainment systems requiring stable component supply and long-term lifecycle support.
Supply support for TPS3600D50PW 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, serving industrial, automotive, and consumer markets.
The TPS3600 family was engineered specifically for low-power processor supervision in battery-backed systems-delivering integrated voltage monitoring, watchdog, switchover, and memory protection in a single 14-pin TSSOP device.
FAQ
What is the exact VIT threshold voltage for TPS3600D50PW?
The TPS3600D50PW has a nominal negative-going input threshold voltage (VIT) of 4.40 V typical, with a guaranteed range of 4.31 V (min) to 4.49 V (max) over –40°C to 85°C. This value is factory-trimmed for 5.0 V supply monitoring and appears in the Electrical Characteristics table on page 11 of the SLVS336A datasheet.
Does TPS3600D50PW support automatic switchover from VDD to VBAT without asserting RESET?
Yes, TPS3600D50PW supports seamless automatic switchover: when VDD drops below VSWN (≈4.44–4.53 V) and VBAT exceeds VDD, the device connects VBAT to VOUT without asserting RESET. This preserves real-time clock and SRAM operation-confirmed in the Functional Schematic (page 4) and Detailed Description (page 8).
How does the battery freshness seal work on TPS3600D50PW?
The battery freshness seal on TPS3600D50PW disconnects VBAT from internal circuitry until first power-up. It is enabled by grounding PFO and MR while powering VDD, then removing VDD. The seal releases on the positive edge of RESET when VDD is reapplied-detailed in the "Battery Freshness Seal" section (page 6) with step-by-step activation sequence.
What is the maximum continuous output current capability of TPS3600D50PW?
TPS3600D50PW delivers up to 200 mA continuous output current at VOUT, as specified in the Recommended Operating Conditions table (page 10). Its 1–2 Ω rDS(on) ensures low dropout: at 150 mA and 5 V input, VOUT remains ≥4.75 V-verified in Figure 5 (page 14) and Electrical Characteristics (page 11).
Can TPS3600D50PW drive an external PMOS transistor directly using BATTON?
Yes, BATTON (Pin 6) on TPS3600D50PW is designed to directly drive the gate of an external PMOS transistor without a current-limiting resistor. As shown in Figure 3 (page 8), it sources sufficient current and orients the FET body diode correctly to prevent VBAT discharge-enabling high-current backup paths beyond the 200 mA internal limit.
TPS3600D50PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.4V
- 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
TPS3600D50PW FAQ
1.How can I place an order for TPS3600D50PW through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3600D50PW 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 TPS3600D50PW reliable?
The price and inventory of TPS3600D50PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3600D50PW is usually 5 days.
3.What payment methods are accepted for TPS3600D50PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3600D50PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3600D50PW?
TPS3600D50PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3600D50PW 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 TPS3600D50PW?
For technical support, including TPS3600D50PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3600D50PW requirements.
6.How does Aetrix verify that TPS3600D50PW is sourced from the original manufacturer or authorized distributors?
All TPS3600D50PW 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 TPS3600D50PW meets industry standards.
7.What is the process for return or replacement of TPS3600D50PW?
All TPS3600D50PW units undergo pre-shipment inspection (PSI). If there is an issue with TPS3600D50PW, 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 TPS3600D50PW part is unused and in its original packaging.
Return procedure for TPS3600D50PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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