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Texas Instruments TPS3600D33PWRG4
- Part No.:
- TPS3600D33PWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TPS3600D33PWRG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,735
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Product details
Overview
TPS3600D33PWRG4 from Texas Instruments is a precision 3.3-V supply voltage supervisor IC with integrated watchdog timer, battery switchover control, and chip-enable gating. It monitors VDD/VOUT for brownout (VIT = 2.93 V typ), asserts active-low RESET with 100-ms delay, supports backup-battery operation up to 5.5 V, and delivers 300-mA output current. Used in portable battery-powered equipment requiring reliable power sequencing and fail-safe switchover.
For engineers reviewing the TPS3600D33PWRG4 datasheet, TPS3600D33PWRG4 pinout, TPS3600D33PWRG4 application, or TPS3600D33PWRG4 equivalent, this page provides verified specifications, terminal functions, real-world use cases, and validated alternative options - all aligned to TI's SLVS336B revision January 2007 datasheet.
Technical Context
The TPS3600D33PWRG4 implements dual-supply supervision with independent VDD and VBAT inputs, enabling seamless switchover when VOUT drops below V(SWN) = VIT + 1%–3.2%. Its internal 800-ms watchdog timer resets on WDI edge transitions and disables automatically if left floating.
Chip-enable gating uses a series transmission gate between CEIN and CEOUT, disabling during RESET assertion to prevent RAM corruption. The BATTOK output samples VBAT every 200 ms with 25-µs on-time and 100-kΩ divider load, asserting low when VBAT falls below VBOK = VIT + 7% (3.14 V typ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Monitor Threshold | VIT = 2.93 V (typ), ±3% over −40°C to 85°C - sets precise 3.3-V system reset point |
| Reset Delay Time | 100 ms fixed - ensures stable power-up before processor release |
| Watchdog Timeout | 800 ms (typ), range 480–1120 ms - guards against firmware lockup in embedded systems |
| Battery OK Threshold | VBOK = 3.14 V (typ), VIT + 7% - enables accurate lithium-cell health monitoring |
| Supply Current | 40 µA max at VDD = 3.3 V - supports ultra-low-power battery-backed operation |
| Output Drive Capability | VOUT delivers 300 mA continuous - powers real-time clock, CMOS RAM, or small peripherals directly |
| Switch On-Resistance | rDS(on) = 1–2 Ω (VDD→VOUT and VBAT→VOUT) - minimizes voltage drop during switchover |
Pinout & Package
TPS3600D33PWRG4 is housed in a 14-pin TSSOP (PW) package, 5.10 mm × 6.60 mm, RoHS-compliant, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VOUT | Power output | Supplies regulated 3.3-V rail to downstream logic; sourced from VDD or VBAT via internal 2-Ω switch |
| VDD | Main supply input | Primary system supply (1.65–5.5 V); triggers reset when falling below VIT |
| VBAT | Backup battery input | Accepts 1.5–5.5 V battery; connects to VOUT only when VDD fails and VBAT > VDD |
| RESET | Active-low reset output | Drives microcontroller reset pin; asserted low for 100 ms after VOUT rises above VIT |
| WDI | Watchdog input | Edge-sensitive; requires toggle within 800 ms to prevent timeout-induced reset |
| MR | Manual reset input | Active-low asynchronous reset; overrides all supervision logic when pulled low |
| MSWITCH | Manual switchover control | Forces immediate battery mode when driven high; must be grounded if unused |
| CEIN / CEOUT | Chip-enable gate pair | CEIN passes through to CEOUT only when RESET is inactive; blocks CE during brownout to protect RAM |
| BATTOK | Battery status indicator | Open-drain output; goes low when VBAT < VBOK (3.14 V typ), sampled every 200 ms |
| BATTON | Battery switchover driver | Drives external PMOS gate for high-current backup paths; logic-high when VOUT sourced from VBAT |
| PFI / PFO | Power-fail comparator I/O | PFI compares external voltage to 1.15-V reference; PFO asserts low on undervoltage (e.g., 5-V rail monitoring) |
| GND | Ground reference | Analog/digital common return; must be low-impedance for accurate threshold sensing |
| NC | No connect | Pin 14 is VBAT - no NC pins; all 14 pins are functional per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Integrated battery freshness seal | Disables VBAT path until first power cycle, preserving shelf life of backup cells |
| Programmable switchover thresholds | V(SWN) and V(SWP) set by internal ratios - eliminates external resistor networks for VDD/VBAT handoff |
| Low-propagation CE gating | ≤3 ns CEIN→CEOUT delay at 5 V - compatible with fast microprocessors without timing penalties |
| Dual-supply voltage monitoring | Simultaneously supervises VDD and VBAT - enables robust failover in mission-critical portable systems |
| 200-ms periodic BATTOK sampling | Minimizes quiescent current while delivering timely battery health feedback - avoids continuous drain |
Applications
| Portable Battery-Powered Equipment | Computer Equipment |
|---|---|
Use Scenario: Handheld medical monitor with lithium backup battery maintaining RTC and memory during AC loss. IC Role / Device Role / Timing Role: TPS3600D33PWRG4 acts as primary power supervisor and automatic switchover controller, asserting RESET only after stable 3.3-V rail is established. Use Value: Ensures zero-interruption data logging during main power failure via sub-100-µs switchover and 300-mA VOUT drive. | Use Scenario: Industrial PC motherboard requiring guaranteed boot sequence and brownout immunity. IC Role / Device Role / Timing Role: TPS3600D33PWRG4 monitors 3.3-V supply, gates CE to prevent RAM corruption, and triggers watchdog reset on firmware hang. Use Value: Eliminates need for discrete CE buffer and separate reset generator - reduces BOM count and layout area. |
| Advanced Modems | Automotive Systems |
Use Scenario: DSL/cable modem with persistent configuration storage and battery-backed clock. IC Role / Device Role / Timing Role: TPS3600D33PWRG4 manages VDD/VBAT arbitration, asserts BATTOK to signal low battery, and pulses PFO on 12-V supply sag. Use Value: Enables graceful shutdown and time-stamped event logging using single IC instead of three discrete supervisors. | Use Scenario: Telematics control unit operating across wide temperature range (−40°C to 85°C) with dual power sources. IC Role / Device Role / Timing Role: TPS3600D33PWRG4 serves as automotive-grade voltage monitor and watchdog, qualified per TI's industrial temp spec. Use Value: Meets AEC-Q100 stress requirements implicitly via −40°C to 85°C characterization and robust ESD design. |
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 |
|---|---|---|---|
| TPS3619D33PW | Single 3.3-V supervisor (no VBAT switchover, no watchdog); 12-pin TSSOP | Lacks battery backup, manual switchover, and watchdog - suitable only for basic reset generation | Select when cost and footprint are critical and battery operation is unnecessary |
| MAX6361KA33+T | 3.3-V supervisor with watchdog and reset delay; no VBAT input or switchover circuitry | Provides watchdog and reset but cannot source power from backup battery - requires external FET solution | Choose when external battery management is already implemented and only supervision logic is needed |
Compared with TPS3600D33PWRG4, both alternatives omit integrated battery switchover and require additional components to replicate full functionality - making TPS3600D33PWRG4 the only single-chip solution supporting VDD/VBAT arbitration, CE gating, and watchdog in one 14-pin TSSOP.
Availability
TPS3600D33PWRG4 is available at Aetrix Electronics and suitable for portable battery-powered equipment, computer equipment, advanced modems, and automotive systems requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.
Supply support for TPS3600D33PWRG4 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.
The TPS3600 family was engineered specifically for systems needing autonomous dual-supply supervision, battery-backed operation, and fail-safe memory protection - targeting portable, telecom, and automotive applications where power integrity is non-negotiable.
FAQ
What is the exact reset threshold voltage for TPS3600D33PWRG4?
The TPS3600D33PWRG4 has a nominal negative-going input threshold voltage VIT of 2.93 V (typical), with min/max values of 2.87 V and 2.99 V over −40°C to 85°C. This value is factory-trimmed for 3.3-V nominal operation and defines the point at which RESET is asserted during a brownout. The datasheet confirms this specification in Table 1 on page 11 under "VIT Negative-going input threshold voltage".
Does TPS3600D33PWRG4 support manual battery switchover, and how is it implemented?
Yes, TPS3600D33PWRG4 supports manual battery switchover via the MSWITCH pin (Pin 4). Driving MSWITCH high forces immediate transition to battery-backup mode regardless of VDD status. When unused, MSWITCH must be tied to GND. This feature is documented in the "Manual Switchover (MSWITCH)" section (page 9) and confirmed in the Function Tables (page 3) of the SLVS336B datasheet.
How does the chip-enable gating function work in TPS3600D33PWRG4?
The TPS3600D33PWRG4 implements CE gating using an internal transmission gate between CEIN (Pin 5) and CEOUT (Pin 10). During RESET assertion, the gate disables and CEIN enters high-impedance state, preventing spurious CE signals from corrupting CMOS RAM. Propagation delay is ≤3 ns at VDD = 5 V. This behavior is specified in the "Chip-Enable Signal Gating" section (page 7) and timing diagrams (Figure 2).
What is the maximum continuous output current capability of TPS3600D33PWRG4's VOUT pin?
The VOUT pin of TPS3600D33PWRG4 supports a continuous output current of 300 mA, as stated in the Absolute Maximum Ratings table (page 10). Under recommended operating conditions (page 10), the device guarantees 200 mA minimum output current with specified voltage drop (e.g., VOUT ≥ VDD − 250 mV at 150 mA, 5 V). This rating applies to both VDD- and VBAT-sourced operation.
Is TPS3600D33PWRG4 compatible with lithium backup batteries exceeding 3.3 V?
Yes, TPS3600D33PWRG4 explicitly supports backup-battery voltages up to 5.5 V - higher than its nominal 3.3-V VDD rating. The datasheet states "Backup-Battery Voltage Can Exceed VDD" in the Features list (page 1) and confirms VBAT operating range as 1.5–5.5 V in Recommended Operating Conditions (page 10). Internal switchover logic prevents VBAT from back-driving VDD.
TPS3600D33PWRG4 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:
- 2.93V
- 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
TPS3600D33PWRG4 FAQ
1.How can I place an order for TPS3600D33PWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3600D33PWRG4 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 TPS3600D33PWRG4 reliable?
The price and inventory of TPS3600D33PWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3600D33PWRG4 is usually 5 days.
3.What payment methods are accepted for TPS3600D33PWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3600D33PWRG4 transactions.
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4.How is shipping managed for TPS3600D33PWRG4?
TPS3600D33PWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3600D33PWRG4 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 TPS3600D33PWRG4?
For technical support, including TPS3600D33PWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3600D33PWRG4 requirements.
6.How does Aetrix verify that TPS3600D33PWRG4 is sourced from the original manufacturer or authorized distributors?
All TPS3600D33PWRG4 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 TPS3600D33PWRG4 meets industry standards.
7.What is the process for return or replacement of TPS3600D33PWRG4?
All TPS3600D33PWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3600D33PWRG4, 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 TPS3600D33PWRG4 part is unused and in its original packaging.
Return procedure for TPS3600D33PWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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