Texas Instruments TPS3807A30DCKR

Overview

TPS3807A30DCKR from Texas Instruments is a dual-channel microprocessor supervisory circuit in SC70-5 package, featuring fixed 3.00 V ±1% VDD monitor and adjustable SENSE input with 1.225 V threshold and 30 mV hysteresis, delivering 3.5 µA typical quiescent current for battery-powered systems such as portable medical devices and handheld instrumentation.

For engineers reviewing the TPS3807A30DCKR datasheet, TPS3807A30DCKR pinout, TPS3807A30DCKR application, or TPS3807A30DCKR equivalent, key selection criteria include dual independent reset assertion (RSTVDD and RSTSENSE), open-drain output compatibility with mixed-voltage systems, ultra-low power consumption, and precise threshold accuracy over –40°C to +85°C.

Technical Context

The TPS3807A30DCKR integrates two independent voltage monitoring paths: one uses an internal precision reference to assert RSTVDD when VDD drops below 3.00 V (±1%), with hysteresis defined by VDD IT+ = 3.575 V; the second monitors external SENSE voltage via resistor divider, triggering RSTSENSE when input falls below 1.225 V (–40°C to +85°C) with fixed 30 mV hysteresis.

Both outputs are open-drain, requiring external pull-up resistors (10 kΩ to 1 MΩ), enabling level-shifting above VDD and supporting multiple supply domains. The device operates across 1.8 V to 6.5 V VDD range and maintains stable performance with 0.1 µF ceramic bypass capacitors on VDD and SENSE pins.

Key Specifications

Pinout & Package

SC70-5 (DCK) package: 2.15 mm × 1.40 mm body, 0.65 mm lead pitch, 1.1 mm max height, JEDEC MO-203 compliant, moisture sensitivity level 1 (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-supply monitoring applications.

Compared with TPS3807A30DCKR, both alternatives sacrifice the critical dual-channel architecture-TPS3808G33DBVR omits SENSE monitoring entirely, while MAX6326XR31D3+T provides no adjustable threshold path-making them unsuitable for applications requiring coordinated reset of primary and auxiliary supplies.

Availability

TPS3807A30DCKR is available at Aetrix Electronics and suitable for battery-powered medical sensors, industrial handheld testers, and smart energy metering modules requiring stable component supply across extended product lifecycles.

Supply support for TPS3807A30DCKR 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 high-reliability components for industrial, automotive, and consumer markets.

The TPS3807 family was designed specifically for space- and power-constrained systems needing independent, high-accuracy monitoring of multiple voltage rails-targeting portable instrumentation, battery-backed infrastructure, and fail-safe embedded controllers.

FAQ

What is the exact VDD threshold voltage specification for TPS3807A30DCKR?

The TPS3807A30DCKR has a fixed VDD threshold of 3.00 V with maximum ±1% deviation across –40°C to +85°C ambient temperature. Measured values fall between 2.963 V (negative-going trip) and 3.037 V (positive-going release), ensuring robust immunity to supply noise during reset assertion and release. This specification is guaranteed per TI's SBVS061B datasheet and applies exclusively to the A30 variant.

Does TPS3807A30DCKR support monitoring of voltages higher than its VDD supply?

Yes, TPS3807A30DCKR supports monitoring of voltages higher than VDD through its SENSE input, which accepts up to +5 V (absolute maximum rating). When used with an external resistor divider, SENSE can scale down higher-voltage rails (e.g., 12 V battery) to the 1.225 V internal threshold. Both RSTVDD and RSTSENSE outputs are open-drain, allowing pull-up to voltages exceeding VDD-enabling interoperability with mixed-voltage system domains.

What is the minimum recommended pull-up resistor value for RSTSENSE and RSTVDD outputs of TPS3807A30DCKR?

The datasheet specifies a recommended pull-up resistor range of 10 kΩ to 1 MΩ for both RSTSENSE and RSTVDD outputs. A 10 kΩ resistor ensures fast rise time (<1 µs with 50 pF load) and strong drive strength, while 1 MΩ minimizes standby current draw-critical in battery applications. For most designs, 100 kΩ offers optimal balance between speed and power. The TPS3807A30DCKR itself draws no current into these pins when asserted low.

Can TPS3807A30DCKR be used in automotive under-hood applications?

No, TPS3807A30DCKR is specified only for –40°C to +85°C operating temperature and lacks AEC-Q200 qualification or automotive-grade screening. Its thermal derating begins above +70°C (power rating drops to 223 mW), and junction temperature must remain ≤125°C. For under-hood use, TI recommends automotive-qualified alternatives like TLV809x or TPS3839 series. The TPS3807A30DCKR remains suitable for automotive cabin or infotainment applications within its rated range.

How does the 30 mV hysteresis on the SENSE input improve system reliability in TPS3807A30DCKR?

The fixed 30 mV hysteresis on the SENSE input prevents oscillatory reset behavior during slow voltage transitions-such as lithium battery discharge near end-of-life-by enforcing a 30 mV gap between trip-down (1.225 V) and release-up (1.255 V) thresholds. This eliminates false resets caused by noise or ripple, ensuring the TPS3807A30DCKR asserts RSTSENSE only once per valid undervoltage event and holds it until recovery exceeds the hysteresis margin, directly improving field reliability in portable equipment.