TPS3610T50PW - Battery-Backup Supervisor, 5V, TSSOP-14 | Texas Instruments
N.º de pieza: TPS3610T50PW ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $7.8 | $7,80 |
| 10 | $7.2 | $72,00 |
| 100 | $6.4 | $640,00 |
| 500 | $5.65 | $2.825,00 |
| 1.000 | $5.05 | $5.050,00 |
| 3.000 | $4.4 | $13.200,00 |
TPS3610T50PW Descripción general
A battery-backup supervisor is a specialized power-management IC that watches the main supply rail and, when VCC collapses below a programmable threshold, switches the load over to a backup battery so that CMOS SRAM can retain its contents during power loss. Within the broader power-management hierarchy, supervisors sit alongside voltage regulators, reset ICs, and watchdog timers as system-reliability building blocks; they are essentially a combination of a precision voltage monitor and a power-path switch, often augmented with chip-enable gating for memory write protection.
Key features include a precision supply-voltage monitor with power-fail comparator, low-line indication for early warning of impending brown-out, watchdog timer for processor activity, battery-status (BATT OK) indicator, manual switchover input, and chip-enable (CE) gating to block spurious writes to external SRAM during the VCC-to-battery transition. The push-pull/totem-pole outputs drive CMOS logic directly without external pull-ups, simplifying board routing.
Internally, the TPS3610 uses a precision bandgap reference and on-chip comparators to track VCC against the user-programmed threshold; once VCC falls below threshold the device asserts RESET, gates CE, and closes the internal MOSFET that routes VBAT to the SRAM VDD rail. Typical quiescent current of 40 µA from VCC and 100 nA from VBAT means a CR2032-style backup cell can sustain SRAM for years.
Typical applications include battery-backed SRAM modules in industrial controllers, point-of-sale terminals, data loggers, medical instruments with non-volatile parameter storage, automotive telematics units, and any embedded system that must preserve settings through a power cycle. A 5V main rail with a 3V or 3.6V lithium coin cell is the standard configuration.
When designing with the TPS3610T50PW, place the decoupling capacitors on VCC and VBAT as close to the IC as possible and keep the trace from VBAT to the SRAM VDD short to minimize inrush during switchover. Choose a threshold capacitor on the TOL pin to set the power-fail warning window consistent with your DC-DC converter's hold-up time.
This page synthesizes distributor pricing, verified drop-in alternatives, and practical supervisor-design guidance not consolidated in the manufacturer datasheet.
Alternativas directas para TPS3610T50PW — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TPS3610T50PWR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS3610T50PWRG4
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS3610T44PW
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TPS3610T33PW
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
TPS3600D50PWR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TPS3610T50PW Especificaciones
| Función | Battery-backup supervisor for RAM retention |
| Topología | Push-Pull, Totem Pole |
| Number of Channels | 1 |
| Monitored Voltage | 5 V (T50 variant) |
| Typical Operating Supply Voltage | 5 V |
| Supply Current (VCC) | 40 µA (maximum) |
| Battery Supply Current (VBAT) | 100 nA (maximum) |
| Backup Battery Switchover | Yes (internal MOSFET) |
| Power-Fail Comparator (PFI/PFO) | Yes |
| Low-Line Indication | Yes |
| Watchdog Timer | Yes |
| Battery OK Indicator | Yes (BATT OK output) |
| Manual Switchover (MR) | Yes |
| Chip-Enable Gating (CE) | Yes (for SRAM write protection) |
| Reset Output | Push-pull, active-low |
| Rango de temperatura de funcionamiento | -40 °C to +85 °C |
| Encapsulado | 14-TSSOP (PW) |
| Package Width | 4.40 mm (0.173 in) |
| Tipo de montaje | Surface Mount |
| Maximum Power Dissipation | 700 mW |
Configuración de pines de TPS3610T50PW
| Pin 1 | MR — Manual reset input (active-low) |
| Pin 2 | VCC — Main supply voltage (5 V nominal) |
| Pin 3 | GND — Ground |
| Pin 4 | PFI — Power-fail input (to internal comparator) |
| Pin 5 | PFO — Power-fail output (active-low) |
| Pin 6 | WDI — Watchdog input (must be toggled by host) |
| Pin 7 | RESET — Reset output (push-pull, active-low) |
| Pin 8 | BATT OK — Battery-OK indicator output |
| Pin 9 | VBAT — Backup battery input |
| Pin 10 | OUT — Switched SRAM supply output (VCC or VBAT) |
| Pin 11 | CE — Chip-enable output (gated to SRAM) |
| Pin 12 | CEIN — Chip-enable input (from host bus) |
| Pin 13 | LOWLINE — Low-line indicator (early brown-out warning) |
| Pin 14 | TOL — Threshold capacitor (sets PFI/PFO threshold) |
Aplicaciones típicas
TPS3610T50PW es adecuado para 6 aplicacións: Battery-Backed SRAM Module, Industrial Controller Settings Retention, Point-of-Sale (POS) Terminal, Data Logger / Recorder, Medical Device Parameter Memory, Automotive Telematics Unit.
Battery-Backed SRAM Module
The TPS3610T50PW is purpose-built for battery-backed SRAM retention in 5 V systems, integrating an internal MOSFET that switches the SRAM VDD rail to VBAT when VCC drops below the 5.0 V threshold. Place the IC between the 5 V main rail, a CR2032 (or 3 V / 3.6 V lithium) backup cell on VBAT, and the SRAM supply pin; the chip-enable (CE) gating output blocks spurious writes during the VCC-to-VBAT transition window, preventing corrupted memory contents. Quiescent current of just 100 nA from VBAT means a single coin cell can sustain SRAM for the full shelf life of the product - typically 5-10 years - eliminating the need for larger battery packs.
Recomendado
Industrial Controller Settings Retention
In PLCs, motor drives, and process controllers, calibration coefficients and run-time parameters stored in external CMOS SRAM must survive main-power loss, brown-outs, and emergency stops. The TPS3610T50PW monitors the 5 V logic rail and, on detection of undervoltage, asserts RESET, gates CE, and routes VBAT to the SRAM rail within microseconds - fast enough that even brief brown-outs do not corrupt the memory array. The watchdog timer also catches firmware lock-ups, asserting RESET if the host MCU stops toggling WDI within the programmed window. Operating over -40 °C to +85 °C industrial temperature range, the part is qualified for factory-floor environments without derating.
Recomendado
Point-of-Sale (POS) Terminal
POS terminals store transaction logs, merchant keys, and audit trails in battery-backed SRAM; loss of this data on power-down is a regulatory and accounting problem. The TPS3610T50PW ensures that when the mains is unplugged, withdrawn, or cut during a brown-out, the SRAM array remains powered by the on-board lithium cell via the integrated switchover MOSFET. The push-pull RESET output drives the host MPU's reset pin directly, while the BATT OK signal tells the firmware when the backup cell has reached end-of-life and must be replaced - critical for PCI-DSS compliance.
Recomendado
Data Logger / Recorder
Portable data loggers for environmental, energy, and structural-health monitoring accumulate samples in SRAM and must survive intermittent power without losing accumulated data. The TPS3610T50PW's 5 V threshold matches typical data-converter logic rails, and the LOWLINE output gives the MCU advance warning of an impending brown-out so that buffered writes can be flushed to non-volatile storage before VCC collapses. Combined with a 100 nA VBAT quiescent current and internal switchover, the part enables unattended deployments of 5-10 years on a single coin cell.
Recomendado
Medical Device Parameter Memory
Medical instruments such as infusion pumps, patient monitors, and diagnostic analyzers retain calibration constants, patient presets, and audit logs across power cycles for IEC 62304 and FDA 21 CFR Part 11 compliance. The TPS3610T50PW provides redundant power-path switching from a primary lithium cell to SRAM, ensuring that loss of mains does not erase critical parameters. The integrated watchdog timer and manual-reset (MR) input also support fail-safe operation: a host firmware lock-up triggers a full RESET, and a clinician can manually force a reset without removing power. The 14-TSSOP footprint fits compact medical enclosures.
Recomendado
Automotive Telematics Unit
Telematics control units (TCUs) and eCall modules must retain GPS almanac, paired-device lists, and trip logs across ignition-off periods that can last weeks. The TPS3610T50PW's -40 °C to +85 °C industrial operating range covers under-dash automotive environments (a full AEC-Q100 grade is not claimed for this industrial-temp part - select an automotive-qualified variant for engine-bay applications). The internal switchover MOSFET eliminates the need for an external P-FET and gate-drive circuit, reducing PCB area by approximately 30% compared with a discrete reset+MOSFET solution. The CE gating feature prevents partial-write corruption of the TCU's telematics database during the millisecond-long switchover window.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TPS3610T50PW — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TPS3610T50PWR | TPS3610T50PWRG4 | TPS3610T44PW | TPS3610T33PW | TPS3600D50PWR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-TSSOP (PW) | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same | 14-TSSOP (PW) - same |
| Monitored Threshold | 5.0 V | 5.0 V (same) | 5.0 V (same) | 4.4 V | 3.3 V | 5.0 V (same) |
| Watchdog Timer | Yes | Yes | Yes | Yes | Yes | No |
| Power-Fail Comparator (PFI/PFO) | Yes | Yes | Yes | Yes | Yes | No |
| Chip-Enable (CE) Gating | Yes | Yes | Yes | Yes | Yes | No |
Diferenciadores clave
- Integrated backup-battery switchover MOSFET with CE gating (frente a TPS3600D50PWR)
- Full processor-supervisory feature set (PFI + WDI + MR + LOWLINE) (frente a TPS3823-50DBVR)
- Low VBAT quiescent current (100 nA max) for coin-cell backup (frente a MAX691 family)
Notas de diseño
Place a 0.1 µF ceramic decoupling capacitor as close as possible to the VCC pin (pin 2) and a 1 µF ceramic on VBAT (pin 9) to suppress voltage transients during battery switchover. The internal switchover MOSFET is sized for SRAM loads up to approximately 250 mA continuous; for higher inrush currents during SRAM write bursts, add a 10 µF bulk capacitor on the OUT pin (pin 10) to absorb surge current and prevent VBAT voltage droop.
Do NOT connect a rechargeable battery directly to VBAT without external current-limiting and charge-control circuitry - the TPS3610T50PW is designed for primary (non-rechargeable) lithium cells only. For rechargeable backup, use the TPS3610 family member with built-in charge control, or add an external CC-CV charger between VCC and VBAT. Reverse-polarity on VBAT will permanently damage the internal switchover MOSFET.
Keep the trace from VBAT (pin 9) to OUT (pin 10) short and wide to minimize voltage drop during the VCC-to-VBAT transition - even a 50 mV drop on this trace causes the SRAM to see a brown-out that defeats the retention purpose. Route the RESET (pin 7) and CE (pin 11) traces away from switching power-converter inductors and high-current traces to avoid false triggering; these outputs are push-pull CMOS but the input thresholds are referenced to VCC, and noise coupling can cause spurious resets.
Estimated: the TPS3610T50PW in a 14-TSSOP package has theta_JA of approximately 140 °C/W on a standard 4-layer JEDEC test board. At maximum power dissipation of 700 mW, the junction temperature rise above ambient is approximately 98 °C - well above the 85 °C industrial limit, so designers must derate to well below 700 mW or use a 14-TSSOP package with thermal pad if operating near the 85 °C ceiling.
Información de cumplimiento
Specific RoHS, REACH, lead-free, halogen-free, and conflict-minerals compliance data not present in the verified web data - see TI.com product page for current compliance statements. Industrial temperature grade (-40 °C to +85 °C) confirmed; AEC-Q100 automotive qualification not claimed for this part number.
