TPS7A2450DBVR - 200mA, 18V Ultra-Low IQ LDO, 5.0V Fixed | Texas Instruments
MPN: TPS7A2450DBVR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.65 | $0.65 |
| 10 | $0.52 | $5.20 |
| 100 | $0.38 | $38.00 |
| 500 | $0.31 | $155.00 |
| 1,000 | $0.26 | $260.00 |
| 3,000 | $0.21 | $630.00 |
TPS7A2450DBVR Overview
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage, eliminating the need for the large headroom required by older NPN-pass regulators. LDOs sit in the broader hierarchy of linear regulators, which themselves are a subset of voltage regulators within the power management IC category of semiconductor devices. Compared to switching converters, LDOs add no switching ripple but dissipate more heat at high VIN-VOUT differentials, making ultra-low-IQ variants like the TPS7A2450DBVR essential for always-on battery-powered systems.
Key differentiating specifications include the 2 µA typical quiescent current - roughly 10x lower than typical 20 µA LDOs - which directly extends battery standby life in IoT nodes. The 70 dB PSRR at 100 Hz effectively filters ripple from upstream switching pre-regulators on a shared rail. Integrated enable (EN) pin supports < 1 µA shutdown current for power gating. Built-in protection features include thermal shutdown and current limit, plus the SOT-23-5 footprint enables compact PCB placement in space-constrained modules.
Architecturally, the TPS7A2450DBVR uses a CMOS pass element with a precision bandgap reference, achieving the low-IQ target without sacrificing transient response. The 250 mV dropout at 200 mA ensures the regulator stays in regulation down to roughly 5.25 V on VIN when sourcing 200 mA into a 5.0 V load, simplifying system design when paired with a 1S Li-ion or USB supply.
Typical applications include battery-powered IoT sensors, always-on microcontroller rails, industrial 12 V to 5 V post-regulation after a switching pre-regulator, and portable medical or wearable electronics. Designers select this part when standby power budget is the critical constraint rather than peak load current.
A key design trade-off is thermal dissipation at high VIN - at VIN=18V, VOUT=5V, IOUT=200mA, dissipation is 2.6 W, which exceeds the SOT-23-5's continuous rating without copper pour mitigation. Plan copper area or limit VIN accordingly.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet to accelerate TPS7A2450DBVR selection.
Drop-in alternatives for TPS7A2450DBVR — 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 TPS7A2450DBVR (same form factor and footprint) — differing in Enable Pin, Input Voltage Range, Operating Temperature Range, Package, Quiescent Current (Typical).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS7A2450DBVT
✅ Drop-In📋 Reference alternative (not in catalog)
TPS7A2450DBVR-Q1
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS7A2050PDBVR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS7A0333PDBVR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS70950DBVR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.39 / Unit
View Datasheet →LP2985-50DBVR
✅ Drop-In📋 Reference alternative (not in catalog)
TLV1117LV33DCYR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TPS7A2450DBVR Maximum Ratings & Electrical Characteristics
| Regulator Type | LDO (Low-Dropout), Positive Fixed |
| Output Voltage (Nominal) | 5.0 V |
| Output Current (Max) | 200 mA |
| Input Voltage Range | 2.4 V to 18 V |
| Dropout Voltage | 250 mV @ 200 mA |
| Quiescent Current (Typical) | 2 µA |
| Output Noise | 300 µVrms |
| PSRR | 70 dB @ 100 Hz |
| Enable Pin | Yes (active-high) |
| Operating Temperature Range | -40 °C to +125 °C (Tj) |
| Package | SOT-23-5 (DBV) |
| Number of Pins | 5 |
| Mounting Type | Surface Mount |
| Protection Features | Over-Current Protection, Thermal Shutdown |
| RoHS Status | Compliant |
TPS7A2450DBVR Pin Configuration
| Pin 1 | IN — Input voltage supply (2.4 V to 18 V) |
| Pin 2 | GND — Ground reference |
| Pin 3 | EN — Enable input (active-high; tie to IN for always-on) |
| Pin 4 | NC — Not connected (per datasheet) - or BYP on some variants |
| Pin 5 | OUT — Regulated 5.0 V output |
Typical Applications
TPS7A2450DBVR is suitable for 6 applications: Battery-Powered IoT Sensor Nodes, Always-On Microcontroller Rails, Industrial 12 V to 5 V Post-Regulation, Portable Medical and Wearable Devices, USB-Powered 5 V Device Rails, Automotive Accessory and Body Electronics.
Battery-Powered IoT Sensor Nodes
The TPS7A2450DBVR's 2 µA typical quiescent current directly extends battery life in wireless IoT sensors that spend >99% of their duty cycle in standby. With 200 mA peak capability and 18 V VIN tolerance, it can be powered from a 1S Li-ion cell (3.0-4.2 V) or even a small solar panel. Its 250 mV dropout at full load means the regulator stays in regulation down to ~5.25 V on VIN at 200 mA - well within a USB or 1S Li-ion range. Unlike a switching pre-regulator, the LDO adds no EMI that could desensitize the adjacent radio, which is critical for sub-GHz or BLE sensor nodes. Place a 1 µF ceramic on input and 1 µF ceramic on output, both within 5 mm of the pins.
Recommended
Always-On Microcontroller Rails
The TPS7A2450DBVR is ideal for always-on rails powering low-power MCUs, RTCs, and supervisory circuits that must remain energized even when the main system rail is off. With 2 µA IQ and EN pin support, the part contributes negligibly to standby budget while still providing 200 mA peak for sensor wake-up bursts. The 70 dB PSRR at 100 Hz cleans up ripple from an upstream buck converter, ensuring clean logic levels. Place between a switching pre-regulator (3.3 V or 5.0 V bus) and the MCU's VDD pin, with the EN tied to a power-good signal so the rail comes up only after upstream rails stabilize.
Recommended
Industrial 12 V to 5 V Post-Regulation
After a switching buck pre-regulator drops 24 V industrial bus to 12 V or 8 V, the TPS7A2450DBVR post-regulates to a clean 5.0 V for analog sensors, op-amps, or isolated transceivers. The 18 V VIN tolerance and 2 µA IQ make it a low-cost, low-noise finishing stage. Its 70 dB PSRR at 100 Hz attenuates residual switching ripple by 3163x, producing an ultra-clean rail for ADC reference or analog front-end bias. Use 1 µF X7R ceramic on input and output; minimize trace inductance by short, wide copper between the LDO and the upstream buck output capacitor.
Recommended
Portable Medical and Wearable Devices
The TPS7A2450DBVR's 2 µA IQ and small SOT-23-5 footprint make it well suited for wearable medical patches and portable diagnostic devices where battery life and PCB area are paramount. Delivering 200 mA supports occasional high-current sensor or display bursts while consuming negligible power during idle. The wide 2.4-18 V input also accepts a single Li-ion cell or USB input directly. For patient-safety designs, follow IEC 60601 isolation rules upstream; the LDO itself is a low-voltage secondary-side regulator and contributes no patient leakage path.
Recommended
USB-Powered 5 V Device Rails
The TPS7A2450DBVR's 5.0 V fixed output matches the USB VBUS rail directly, making it a natural post-regulator for USB-powered embedded devices. With 18 V tolerance, the part survives hot-plug transients and inductive kickback on the USB port. The 200 mA capability easily supports downstream low-power peripherals (LEDs, sensors, small MCUs). The EN pin can be tied to a USB detect signal so the rail powers up only when VBUS is present. Add 10 µF bulk + 0.1 µF ceramic bypass at the LDO input to absorb USB inrush and ESD events.
Recommended
Automotive Accessory and Body Electronics
The automotive-grade TPS7A2450DBVR-Q1 variant (AEC-Q100 qualified) supports body electronics, infotainment accessory rails, and always-on CAN/LIN transceivers in 12 V automotive systems. With 18 V continuous VIN tolerance, it survives load-dump transients up to ~35 V when paired with a TVS clamp. The 2 µA IQ is critical for key-off parasitic drain budgets, often required to stay below 100 µA total vehicle standby. Use the Q1 suffix variant for production automotive designs and add input TVS protection per ISO 7637-2.
Recommended
Recommended Products Summary
Engineering reference data for TPS7A2450DBVR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS7A2450DBVT | TPS7A2050PDBVR | TPS70950DBVR |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | SOT-23-5 (DBV) | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same | SOT-23-5 (DBV) - same |
| Output Voltage (Fixed) | 5.0 V | 5.0 V | 5.0 V | 5.0 V |
| Output Current (Max) | 200 mA | 200 mA | 200 mA | 200 mA |
| Input Voltage Range | 2.4 V to 18 V | 2.4 V to 18 V | 2.4 V to 18 V | 2.7 V to 30 V |
| Quiescent Current (Typ) | 2 µA | 2 µA | 2.5 µA | 1 µA |
| Dropout Voltage @ Full Load | 250 mV @ 200 mA | 250 mV @ 200 mA | 290 mV @ 200 mA | 300 mV @ 200 mA |
| PSRR | 70 dB @ 100 Hz | 70 dB @ 100 Hz | 70 dB @ 100 Hz | 65 dB @ 100 Hz |
| Automotive Grade (AEC-Q100) | No (Q1 variant available) | No | No | No (Q1 variant available) |
| Power-Good (PG) Output | No | No | Yes | No |
Key Differentiators
- Ultra-low 2 µA quiescent current (vs TPS70950DBVR (1 µA IQ))
- 70 dB PSRR at 100 Hz with 2 µA IQ simultaneously (vs LP2985-50DBVR (45 dB PSRR, 850 µVrms noise))
- Integrated enable pin with no external bias network (vs TPS7A2450DBVT (same part, reel-pack variant))
Design Notes
Estimated: at VIN=18 V, VOUT=5.0 V, IOUT=200 mA, power dissipation is (18-5) * 0.2 = 2.6 W. The SOT-23-5 (DBV) package has θJA ≈ 200 °C/W on a 1 oz 1-layer 1 sq-in copper pour, producing a ~520 °C junction temperature rise above ambient - well beyond the 150 °C thermal shutdown limit. Reduce VIN or load to keep dissipation below ~0.5 W (e.g., VIN=8 V at 200 mA yields 0.6 W). For 18 V full-input applications, use a switching pre-regulator to drop VIN closer to VOUT before the TPS7A2450DBVR.
Place input and output ceramic capacitors as close to the IC pins as possible, ideally within 3 mm. Use 1 µF X7R 25 V minimum on input and 1 µF X7R 10 V minimum on output. For high-transient-load applications, increase output capacitance to 2.2 µF or 4.7 µF to improve transient response. Add a 0.1 µF bypass capacitor in parallel if the upstream source has high inductance (long USB cable, etc.). Connect the GND pin to a continuous ground plane with multiple vias for thermal relief.
Do not exceed the absolute maximum VIN of 20 V (datasheet limit); add a TVS diode or Zener clamp if transients are possible. The EN pin must be driven high (above 1.2 V) for normal operation - leaving it floating enables the output but can cause startup glitches in noisy environments; tie EN directly to IN through a 100 kΩ resistor if always-on. Do not reverse the input polarity - the part has no internal reverse-diode protection. For battery-powered designs, size input capacitance to handle inrush without violating UVLO.
Compliance Information
RoHS compliant per JLCPCB listing and TI product page. The Q1 suffix variant (TPS7A2450DBVR-Q1) is AEC-Q100 qualified for automotive; the standard TPS7A2450DBVR is not. Lead-free and halogen-free per TI datasheet materials disclosure.