TPS7A6650QDGNRQ1 - 150mA 40V Off-Battery LDO | TI
MPN: TPS7A6650QDGNRQ1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.18 | $2.18 |
| 10 | $1.96 | $19.60 |
| 100 | $1.74 | $174.00 |
| 500 | $1.56 | $780.00 |
| 1,000 | $1.39 | $1,390.00 |
| 2,500 | $1.24 | $3,100.00 |
TPS7A6650QDGNRQ1 Overview
An LDO (Low-Dropout) linear regulator is a non-switching DC voltage regulator that maintains a tightly regulated output voltage even when the input-to-output differential voltage is small. As a member of the linear-regulator family, which itself belongs to the broader voltage-regulator and power-management IC hierarchy, the TPS7A6650-Q1 trades efficiency for noise cleanliness - it adds no switching ripple on its output, which is critical for keep-alive supplies that must not couple noise onto a vehicle's data network.
Key specifications include an input voltage range of 4 V to 40 V (with 45-V transient survival), a 12-microampere quiescent current at no load, integrated short-circuit and overcurrent protection, a programmable power-good reset delay, and an operating junction temperature range of -40 °C to +125 °C. The part is qualified to AEC-Q100 grade 1 for automotive use, and is shipped in MSL-Level-3 packaging suitable for automotive production lines.
The TPS7A6650-Q1 uses a bipolar pass architecture with a precision bandgap reference and an integrated power-good comparator, allowing the regulator to deliver a clean 5 V rail while signalling a valid output to a microcontroller through the PG pin. Reset delay is set by an external capacitor on the RESET_DELAY pin, eliminating the need for a separate supervisory IC.
Typical applications include automotive standby microcontroller power (for body-control modules, instrument clusters, and remote keyless-entry receivers), off-battery always-on rails, CAN/LIN transceivers, and remote sensing modules that must survive load-dump transients on the vehicle bus.
When designing with this regulator, route both input and output capacitors as close as possible to the IC pins and bond the exposed thermal pad to a copper pour of at least 1 square inch - the standby current is so low that thermal stress is normally a non-issue, but the high VIN margin means even brief short-to-battery events must be considered.
This page synthesises distributor pricing, AEC-Q100 drop-in cross-references, and practical PCB layout notes that go beyond the manufacturer datasheet, giving automotive engineers a faster path to a robust keep-alive supply.
Drop-in alternatives for TPS7A6650QDGNRQ1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TPS7A6650QDGNRQ1 (same form factor and footprint) — differing in MSL Level, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS7A6650PDGNR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS7A6901PDGNRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
TPS7A6650PWR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS7A6650QPWPRQ1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS7A6650QDGNRQ1 Maximum Ratings & Electrical Characteristics
| Regulator Type | LDO (Low-Dropout), Fixed Positive |
| Output Voltage (Nominal) | 5.0 V |
| Output Current (Maximum) | 150 mA |
| Input Voltage Range | 4 V to 40 V |
| Input Voltage (Transient Survival) | 45 V (load-dump rated) |
| Quiescent Current (No Load) | 12 µA (typ) |
| Power Good Output | Yes (open-drain, programmable delay) |
| Operating Junction Temperature | -40 °C to +125 °C |
| Protection Features | Short-circuit, overcurrent, thermal shutdown |
| Package | 8-pin HVSSOP (PowerPAD MSOP, DGN) |
| Thermal Pad | Yes (exposed pad, must be soldered to PCB) |
| MSL Level | Level 3 |
| AEC-Q100 Qualification | Yes (Grade 1) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
TPS7A6650QDGNRQ1 Pin Configuration
| Pin 1 | IN — Input supply voltage (4 V to 40 V) |
| Pin 2 | IN — Input supply (duplicate, must be connected together with pin 1) |
| Pin 3 | RESET_DELAY — Programmable reset-delay timing capacitor |
| Pin 4 | PG — Power-good open-drain output (active low when output is valid) |
| Pin 5 | GND — Ground |
| Pin 6 | OUT_SENSE — Output voltage sense / feedback input |
| Pin 7 | OUT — Regulated output voltage (5.0 V) |
| Pin 8 | OUT — Regulated output (duplicate, must be connected together with pin 7) |
| Pin PAD | Thermal Pad — Exposed thermal pad - tie to GND copper pour for heat dissipation |
Typical Applications
TPS7A6650QDGNRQ1 is suitable for 6 applications: Automotive Standby Microcontroller Supply, Off-Battery Always-On Subsystems, CAN/LIN Transceiver and Sensor Power, Industrial 24 V Sensor Bus Power, Battery-Backed Memory and RTC Modules, Remote Keyless Entry and Tire Pressure Sensor Wake-Up.
Automotive Standby Microcontroller Supply
The TPS7A6650QDGNRQ1 is engineered for the standby power-rail of automotive microcontrollers that must stay live even when the ignition is off. Its 12 µA no-load quiescent current lets the regulator sit on a 12 V battery for weeks without flattening it, while the 4 V to 40 V continuous input range tolerates cranking transients and 24 V commercial-vehicle rails alike. The integrated open-drain PG output signals valid 5 V to the MCU so that firmware begins running only after a clean power-up; reset delay is set by a single external capacitor. The 150 mA output is sufficient to run a small MCU, a CAN/LIN transceiver, and a wake-up sensor. AEC-Q100 Grade 1 qualification permits use in cabin and underhood body-electronics modules across -40 °C to +125 °C ambient.
Recommended
Off-Battery Always-On Subsystems
Body-control modules, instrument-cluster wake-up controllers, and remote-keyless-entry (RKE) receivers all need a permanently-on 5 V rail directly off the vehicle battery. The TPS7A6650QDGNRQ1 accepts VIN up to 40 V continuously and survives 45 V load-dump transients, eliminating the need for a preregulator. At 12 µA IQ, the part contributes essentially nothing to parasitic drain, which is the dominant standby-power metric in modern vehicles. The fixed 5 V output removes external feedback resistors from the BOM, and the HVSSOP-8 DGN footprint occupies under 12 mm² of board area. Short-circuit and overcurrent protection on the pass element prevent module-level field failures.
Recommended
CAN/LIN Transceiver and Sensor Power
Automotive networking nodes (CAN, LIN, FlexRay) and their associated sensors often require a clean 5 V rail sourced directly from the battery bus. The TPS7A6650QDGNRQ1's bipolar LDO architecture injects no switching noise onto the LIN/CAN supply, which is critical because transceivers derive bus signals from this rail. With 150 mA of continuous output, the regulator can power a transceiver plus a small sensor cluster (temperature, humidity, accelerometry) without thermal stress on the HVSSOP-8 exposed pad. AEC-Q100 Grade 1 qualification allows designers to qualify one bill-of-materials for the entire vehicle electrical system.
Recommended
Industrial 24 V Sensor Bus Power
Though originally designed for 12 V automotive batteries, the TPS7A6650QDGNRQ1 operates equally well from a 24 V industrial bus. Industrial sensors, PLC island networks, and ISA-style field instrumentation require clean 5 V rails that must survive wide input transients; the part's 4 V to 40 V continuous rating covers both 12 V and 24 V nominal buses plus inductive kick spikes from solenoids. The HVSSOP-8 DGN footprint fits the same pads on the board as many 24 V-to-5 V LDOs, simplifying a one-board lineup. Note that only the -Q1 suffix is AEC-Q100 qualified; for non-automotive industrial use the standard TPS7A6650 may be qualified as well.
Recommended
Battery-Backed Memory and RTC Modules
External event-data recorders (EDRs), battery-backed SRAM modules, RTC devices and small black-box sensors need a backup rail maintained even after main system power has been removed. The TPS7A6650QDGNRQ1's 12 µA IQ and 5 V fixed output make it ideal for keeping an SPI FRAM or RTC chip permanently live from the car battery, contributing negligible parasitic drain. The PG output can be inverted and routed to the host MCU to signal a 'rail-valid' event so the host can quickly flush volatile state. The exposed thermal pad is more than sufficient for the few milliamps drawn by typical backup memory.
Recommended
Remote Keyless Entry and Tire Pressure Sensor Wake-Up
Tire-pressure monitoring system (TPMS) wake-up receivers, RKE fobs in 'always-listening' duty cycles, and similar wireless security devices draw microamps until activity is detected. The TPS7A6650QDGNRQ1 supplies the fixed 5 V (or 3.3 V using the TPS7A6601-Q1 suffix) rail to the receiver's MCU during the always-on phase, contributing ~12 µA and so consuming almost no battery. Its 45 V transient survival protects against the harsh electrical environment of the wheel well. The exposed-pad HVSSOP-8 handles any short-burst current spikes during active RF transmission.
Recommended
Recommended Products Summary
Engineering reference data for TPS7A6650QDGNRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS7A6650PDGNR | TPS7A6901PDGNRQ1 | TPS7A6650PWR | TPS7A6650QPWPRQ1 |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-pin HVSSOP (DGN) | 8-pin HVSSOP (DGN) - same | 8-pin HVSSOP (DGN) - same | 8-pin HVSSOP (DGN) - same | 8-pin HTSSOP (PWP) - compatible variant |
| Output Voltage | 5.0 V fixed | 5.0 V fixed | 3.3 V / 5 V / 8 V / 9 V (suffix code) | 5.0 V fixed | 5.0 V fixed |
| Output Current | 150 mA | 150 mA | Higher output current rated | 150 mA | 150 mA |
| Input Voltage Range | 4 V to 40 V | 4 V to 40 V | 4 V to 40 V | 4 V to 40 V | 4 V to 40 V |
| Quiescent Current (typ) | 12 µA | 12 µA | 12 µA | 12 µA | 12 µA |
| Power-Good Output | Yes (PG) | Yes | Yes | Yes | Yes |
| AEC-Q100 Qualification | Yes (Grade 1) | No (industrial grade) | Yes (Grade 1) | No | Yes (Grade 1) |
Key Differentiators
- 40 V continuous / 45 V transient VIN with 12 µA IQ (vs TPS7A6901PDGNRQ1)
- Integrated PG output and programmable reset delay (vs TPS7A6650PWR (non-Q1))
- AEC-Q100 Grade 1 qualification with full PPAP (vs TPS7A6650PDGNR (industrial grade))
Design Notes
At 12 V battery input and 5 V/150 mA output, the TPS7A6650QDGNRQ1 dissipates approximately 1.05 W under full load ((VIN - VOUT) x IOUT = 7 V x 0.15 A). The 8-pin HVSSOP (DGN) with exposed thermal pad has a theta_JA of approximately 60 C/W on a 1-oz copper pour, which yields a ~63 C junction-temperature rise above ambient at full load. For continuous 150 mA operation in enclosed automotive compartments we recommend a copper pour of at least 1 square inch bonded to the exposed pad to keep Tj well under the 125 C automotive grade-1 limit.
Place the input capacitor (>= 1 µF X7R 50 V) within 5 mm of the IN pins, the output capacitor (>= 2.2 µF X7R 10 V) within 5 mm of the OUT pins, and the RESET_DELAY capacitor directly at the RESET_DELAY pin with short traces to ground. The OUT and IN pins are duplicated (pins 1+2 are IN, pins 7+8 are OUT) - both must be connected together on the PCB to handle the full 150 mA continuously. The PG pull-up resistor should be returned to the regulator's own 5 V output to avoid backfeeding into a disabled rail.
Do not assume the TPS7A6650QDGNRQ1 will tolerate negative battery transients - a reverse-battery TVS diode at the input is recommended for fully ISO-7637-2 / ISO-16750-2 compliant designs. The RESET_DELAY pin is sampled on power-up only; toggling RESET_DELAY after PG is valid does not retrigger the power-good signal. Finally, always check the output-voltage suffix code (50 = 5.0 V, 33 = 3.3 V, 18 = 1.8 V, etc.) before substituting - the TPS7A69-Q1 family offers multiple VOUT options on the same DGN footprint.
Compliance Information
RoHS compliant and lead-free per TI product page. AEC-Q100 Grade 1 qualified - the -Q1 suffix indicates PPAP-supported automotive grade. Halogen-free status was not present in the verified web data and is listed as 'unknown' rather than guessed.
