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Texas Instruments TPS3600D20PW
- Part No.:
- TPS3600D20PW
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS3600D20PW.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,270
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Product details
Overview
TPS3600D20PW from Texas Instruments is a precision 2.0-V supply voltage supervisor IC with integrated watchdog timer, battery switchover control, and chip-enable gating. It monitors VDD or VBAT, asserts active-low RESET during brownout (VOUT < 1.78 V typ), provides 100-ms power-on reset delay, and supports manual battery backup activation via MSWITCH. Used in portable battery-powered equipment requiring reliable low-power system supervision.
For engineers reviewing the TPS3600D20PW datasheet, TPS3600D20PW pinout, TPS3600D20PW application, or TPS3600D20PW equivalent, key selection criteria include its 2.0-V nominal supply threshold, 40 µA max supply current, 800-ms watchdog timeout, dual-source switchover capability, and 14-pin TSSOP package with validated CEIN/CEOUT propagation delay of ≤3 ns at 5 V.
Technical Context
The TPS3600D20PW implements a dual-supply supervisory architecture with independent VDD and VBAT inputs, enabling seamless switchover to backup battery when VDD falls below V(SWN) = VIT + 1%–3.2%. Its internal 1.15-V reference drives both the main supply monitor and PFI comparator, while the watchdog timer resets on any WDI edge within 0.8 s (typ).
Chip-enable gating uses a transmission gate between CEIN and CEOUT, disabled during RESET assertion to prevent CMOS RAM corruption; propagation delay is ≤3 ns (VDD = 5 V) in enable mode and transitions to high-impedance CEIN with pullup to VOUT in disable mode. BATTOK output samples VBAT every 200 ms with 25-µs measurement window and 100-kΩ divider load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Supply Voltage | 2.0 V - Sets VIT threshold at 1.78 V (typ), enabling precise monitoring of 2.0-V logic rails. |
| Supply Current (Max) | 40 µA - Enables ultra-low-power operation in always-on battery-backed systems. |
| Watchdog Timeout | 800 ms (typ) - Provides sufficient time for firmware recovery without false triggers in microcontroller applications. |
| RESET Delay Time | 100 ms (fixed) - Ensures stable power-up sequencing before processor release. |
| VDD-to-VOUT rDS(on) | 1–2 Ω - Minimizes voltage drop (<250 mV at 150 mA) during main supply operation. |
| VBAT-to-VOUT rDS(on) | 1–2 Ω - Maintains low-loss battery backup path for sustained RTC or memory retention. |
| BATTOK Threshold | VIT + 7% (1.91 V typ) - Detects battery degradation before critical voltage collapse. |
| Operating Temperature | −40°C to 85°C - Qualified for industrial and automotive ambient environments. |
Pinout & Package
TPS3600D20PW is housed in a 14-pin TSSOP (PW) package, 5.10 mm × 6.60 mm body size, lead-free (NIPDAU), RoHS-compliant, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT (Pin 1) | Power output | Supplies regulated system rail; connects to VDD or VBAT based on switchover state. |
| VBAT (Pin 14) | Backup battery input | Accepts 1.5–5.5 V battery; enables automatic switchover when VDD fails. |
| VDD (Pin 2) | Main supply input | Primary 1.65–5.5 V supply; powers device and determines RESET assertion threshold. |
| MSWITCH (Pin 4) | Manual switchover control | Logic-high forces immediate battery-backup mode; grounded when unused. |
| CEIN (Pin 5) | Chip-enable input | Passes through to CEOUT unless RESET is active; high-impedance during reset. |
| BATTON (Pin 6) | Battery switchover driver | Drives external PMOS gate directly; enables high-current backup path. |
| PFI (Pin 7) | Power-fail comparator input | Monitors auxiliary voltage against 1.15-V internal reference; hysteresis = 12 mV. |
| PFO (Pin 8) | Power-fail comparator output | Active-low flag indicating auxiliary supply failure; used for secondary brownout detection. |
| BATTOK (Pin 9) | Battery status indicator | Open-drain output pulses low if VBAT < V(BOK); sampled every 200 ms. |
| CEOUT (Pin 10) | Chip-enable output | Gated CE signal; propagation delay ≤3 ns (VDD = 5 V) ensures timing-critical RAM access. |
| MR (Pin 11) | Manual reset input | Active-low asynchronous reset; pulse width ≥100 ns required for reliable assertion. |
| WDI (Pin 12) | Watchdog timer input | Edge-triggered; any transition within 800 ms resets watchdog; unconnected = disabled. |
| RESET (Pin 13) | Reset output | Active-low open-drain output; asserts when VOUT < VIT and holds for 100 ms after recovery. |
| GND (Pin 3) | Ground reference | Common return for all analog and digital circuitry; requires low-impedance PCB connection. |
Key Features
| Feature | Design Value |
|---|---|
| Battery freshness seal | Disables VBAT connection until first power-up, preserving shelf life of installed backup battery. |
| Chip-enable gating | Prevents data corruption in CMOS RAM during under-voltage by disabling CEIN→CEOUT path during RESET. |
| Dual-supply switchover | Automatically switches VOUT from VDD to VBAT when VDD drops below V(SWN), with no pre-reset assertion. |
| Integrated watchdog timer | Self-contained 800-ms timeout with edge-sensitive WDI input-no external RC components needed. |
| Power-fail comparator | Dedicated PFI/PFO pair with 1.15-V reference allows monitoring of non-nominal rails (e.g., 12 V, 3.3 V). |
| Low quiescent current | 40 µA max (VDD mode) extends battery life in long-term monitoring and portable applications. |
Applications
| Portable Battery-Powered Equipment | Fax Machines |
|---|---|
|
Use Scenario: Handheld medical monitors with lithium coin-cell backup maintaining real-time clock and SRAM during AC loss. IC Role / Device Role: Primary supervisor managing VDD/VBAT switchover, asserting RESET only after safe state capture, and gating CE to preserve RAM integrity. Use Value: Enables >10-year battery shelf life via freshness seal and eliminates need for external MOSFET drivers or discrete watchdog circuits. |
Use Scenario: Fax machines requiring uninterrupted memory retention and rapid power-cycle recovery after line voltage dips. IC Role / Device Role: Dual-rail supervisor ensuring clean reset during brownouts and enabling fast reinitialization via fixed 100-ms delay. Use Value: Prevents corrupted fax buffer writes using CE gating and avoids spurious reboots via 12-mV PFI hysteresis. |
| Advanced Voice Mail Systems | Point of Sale Equipment |
|
Use Scenario: Voicemail systems retaining call logs and configuration during extended power outages using 3.6-V Li-ion backup. IC Role / Device Role: Battery-status manager triggering BATTOK alert before voltage collapse and driving BATTON to enable high-current backup path. Use Value: Delivers 300-mA continuous VOUT current with <250-mV drop, supporting full-system operation from battery alone. |
Use Scenario: POS terminals with flash memory and secure elements needing tamper-proof reset signaling and supply monitoring. IC Role / Device Role: Security-critical supervisor providing glitch-immune MR input, low-jitter RESET assertion, and isolated PFI monitoring of 5-V peripherals. Use Value: Meets EN 55032 immunity requirements via 100-ns MR pulse tolerance and 34 mV/µs slew-rate compliance on VDD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervisor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3619-20DBVR | Single-supply (VDD only), no VBAT switchover, no BATTON output, 3-pin SOT-23 package. | Lacks battery backup functionality; suitable only for basic 2.0-V supply monitoring without redundancy. | Select when cost and board space are critical and backup power is not required. |
| MAX6361KA20+T | 2.0-V supervisor with 140-ms reset delay, no watchdog, no CE gating, 5-pin SOT23 package. | Provides simpler reset-only function; missing switchover, BATTOK, and PFI/PFO features. | Choose for legacy designs where minimal feature set and Maxim compatibility are priorities. |
Compared with TPS3600D20PW, TPS3619-20DBVR omits battery management entirely, while MAX6361KA20+T lacks both watchdog and chip-enable protection-making TPS3600D20PW uniquely suited for systems requiring coordinated power fail response, RAM safety, and dual-source resilience.
Availability
TPS3600D20PW is available at Aetrix Electronics and suitable for portable battery-powered equipment, fax machines, advanced voice mail systems, and point of sale equipment requiring stable component supply across industrial temperature ranges.
Supply support for TPS3600D20PW 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 connectivity technologies, with decades of expertise in power management and system supervision ICs.
The TPS3600 family was designed specifically for systems requiring robust dual-supply supervision, battery-backed operation, and integrated watchdog/CE gating-targeting portable, telecom, and industrial equipment where reliability and low-power operation are critical.
FAQ
What is the exact supply voltage threshold for TPS3600D20PW?
The TPS3600D20PW has a nominal supply voltage of 2.0 V, with a negative-going input threshold voltage (VIT) of 1.78 V (typical), 1.74 V (min), and 1.82 V (max) over −40°C to 85°C. This threshold applies to both VDD and VBAT inputs and defines the point at which RESET is asserted during brownout conditions.
Does TPS3600D20PW support automatic switchover to backup battery?
Yes, TPS3600D20PW supports automatic switchover: when VDD falls below V(SWN) = VIT + 1%–3.2%, and VBAT > VDD, the device connects VBAT to VOUT through a 1–2 Ω switch without asserting RESET. Recovery occurs when VDD rises above V(SWP) or crosses VBAT, ensuring uninterrupted operation.
How does the watchdog timer in TPS3600D20PW operate?
The TPS3600D20PW watchdog timer has an 800-ms typical timeout period. It resets on any rising or falling edge at WDI. If WDI is left unconnected, the watchdog is internally disabled. For lowest current, drive WDI low for 7/8 of the timeout, then pulse high-low to reset-avoiding 125 µA leakage current.
What is the purpose of the BATTON pin on TPS3600D20PW?
BATTON is a dedicated battery switchover driver output on TPS3600D20PW. It directly drives the gate of an external PMOS transistor (no resistor needed) to enable high-current backup paths. When active, it indicates VOUT is sourced from VBAT and can also serve as a logic-level battery-active signal.
Can TPS3600D20PW monitor voltages other than its nominal 2.0-V supply?
Yes, TPS3600D20PW includes a dedicated power-fail comparator with PFI and PFO pins. PFI compares an external voltage against a 1.15-V internal reference; by using a resistor divider, it can monitor any voltage >1.15 V (e.g., 3.3 V, 5 V, or 12 V rails), with 12-mV hysteresis for noise immunity.
TPS3600D20PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 1.78V
- 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
TPS3600D20PW FAQ
1.How can I place an order for TPS3600D20PW through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3600D20PW 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 TPS3600D20PW reliable?
The price and inventory of TPS3600D20PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3600D20PW is usually 5 days.
3.What payment methods are accepted for TPS3600D20PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3600D20PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3600D20PW?
TPS3600D20PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3600D20PW 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 TPS3600D20PW?
For technical support, including TPS3600D20PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3600D20PW requirements.
6.How does Aetrix verify that TPS3600D20PW is sourced from the original manufacturer or authorized distributors?
All TPS3600D20PW 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 TPS3600D20PW meets industry standards.
7.What is the process for return or replacement of TPS3600D20PW?
All TPS3600D20PW units undergo pre-shipment inspection (PSI). If there is an issue with TPS3600D20PW, 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 TPS3600D20PW part is unused and in its original packaging.
Return procedure for TPS3600D20PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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