TLV70018DCKR - 200mA 1.8V Low-IQ LDO SC-70 | TI
MPN: TLV70018DCKR ✓ NakahandaTLV70018DCKR Ulas
An LDO (low-dropout regulator) is a type of linear voltage regulator that maintains a stable output even when the input voltage approaches the output voltage, dissipating excess power as heat while providing a clean, low-noise supply rail. Within the power management IC hierarchy, LDOs bridge switching converters and noise-sensitive loads that require ripple-free power.
Key features include a low quiescent current (typically 31 uA), high PSRR (68 dB at 1 kHz), and an active enable pin for power sequencing and shutdown. The device is stable with just a 1-uF ceramic output capacitor, minimizing board space and BOM cost. Overcurrent and thermal shutdown protection guard against fault conditions, and the low dropout voltage (typically 130 mV at 200 mA) supports efficient operation with small headroom.
Technically, the TLV70018DCKR uses a CMOS process with a precision bandgap reference, achieving about +/-2% output accuracy over line, load, and temperature. Shutdown via the enable pin drops supply current to near zero, a critical feature for battery-operated designs. The SC-70 package has a thermal resistance of approximately 250 C/W, so power dissipation must be budgeted for large VIN-VOUT differentials.
Typical applications include powering microcontrollers, wireless modules, and analog sensors in smartphones, wearables, and IoT devices. Its low noise and high PSRR also suit RF and audio circuits where supply noise degrades performance.
Design tip: place 1-uF ceramic input and output capacitors close to the pins, and verify the thermal budget at maximum load and input voltage. Use the enable pin for sequenced power-up in multi-rail systems. Pricing as of 2026-08-29.
Mga alternatibo na pwedeng ilagay na TLV70018DCKR — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
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TLV70018DCKR Mga Pinakamataas na Rating at Electrical Characteristics
| Type ng Output | Fixed positive |
| Output Volte | 1.8 V |
| Maksimum na Current ng Output | 200 mA |
| Hanay ng Voltage ng Input | 2 V to 5.5 V |
| Voltage ng Dropout | 130 mV typ at 200 mA |
| Kuru-kuryente ng Kapayapaan | 31 uA typ |
| PSRR | 68 dB at 1 kHz |
| Output Accuracy | +/-2% over line, load, temperature |
| Output Capacitor | 1 uF ceramic minimum |
| Pin na Pinapayagan | Yes (active-high) |
| Protection | Overcurrent, thermal shutdown |
| Temperature na Operasyon | -40C to +125C |
| Packhaging | SC-70-5 (DCK / SOT-353) |
| Uri ng Pagpapasok | Surface Mount |
| Bilang ng Pins | 5 |
| Packaging | Tape & Reel (R suffix) |
| Tindminan RoHS | Compliant |
Pin Configuration ng TLV70018DCKR
| Pin 1 | IN — Input supply, 2 V to 5.5 V |
| Pin 2 | GND — Ground |
| Pin 3 | EN — Enable, active high (tie to IN for always-on) |
| Pin 4 | NC — No connect |
| Pin 5 | OUT — Fixed 1.8 V regulated output |
Tipikal na mga Gamit
TLV70018DCKR ay nararapat para sa 6 aplikasyons: Battery-Powered Wearables, IoT Sensor Nodes, Smartphone and Portable Electronics, RF and Wireless Module Power, Microcontroller Core and I/O Rails, Analog Sensor and Precision Front-Ends.
Battery-Powered Wearables
The TLV70018DCKR fits wearables because its 31 uA typical quiescent current minimizes standby drain, and near-zero shutdown current via the EN pin lets the MCU gate the 1.8 V rail between activity bursts. With a 2 V to 5.5 V input range, it accepts Li-ion cells directly or the output of a boost converter. The 2 mm x 2.1 mm SC-70-5 footprint preserves board area in compact enclosures, and only a 1-uF ceramic output capacitor is needed, cutting BOM size.
Inirekomenda
IoT Sensor Nodes
IoT nodes sleep most of the time and wake briefly to sample and transmit, so supply current in regulation dominates average power. The TLV70018DCKR's 31 uA IQ and 68 dB PSRR at 1 kHz suppress upstream buck-converter ripple reaching sensitive analog sensors and ADC references. The active-high EN pin enables sequenced power-up from the host MCU, and +/-2% output accuracy over line, load, and temperature keeps sensor excitation references stable without calibration. Per TI datasheet, it is stable with 1-uF ceramics placed close to the pins.
Inirekomenda
Smartphone and Portable Electronics
Handsets and tablets dedicate many small LDOs to individual noise-sensitive rails. The TLV70018DCKR's 200 mA capability covers camera module, sensor-hub, and RF companion supplies, while its 68 dB PSRR (1 kHz) cleans up after shared DC-DC rails. Its dropout of only 130 mV at full load supports efficient post-regulation from 2.5 V or 2.8 V rails, and the tiny DCK package matches dense handset PCBs. TI designed the TLV700 family explicitly as a low-IQ LDO for portable devices.
Inirekomenda
RF and Wireless Module Power
RF front-ends, Bluetooth, and sub-GHz radio modules are highly sensitive to supply noise, which raises phase noise and degrades EVM. The TLV70018DCKR provides a clean 1.8 V rail with 68 dB PSRR at 1 kHz, post-regulating a switching supply to remove switching spurs. Its 31 uA IQ suits duty-cycled transmitters, and the 200 mA rating covers typical transmit bursts of compact radios. Keep the 1-uF input/output ceramics within a few millimeters of the pins, per TI layout guidance, to preserve PSRR at frequency.
Inirekomenda
Microcontroller Core and I/O Rails
Many MCUs and SoCs require a tightly regulated 1.8 V core rail. The TLV70018DCKR delivers 200 mA with +/-2% accuracy, and its EN pin supports controlled power sequencing required by multi-rail processors - bring the 1.8 V rail up after the 3.3 V I/O rail. Built-in overcurrent and thermal shutdown protect against shorts during bring-up. With dropout of only 130 mV at 200 mA, it post-regulates efficiently from 2.5 V or 3.3 V system rails with minimal dissipation.
Inirekomenda
Analog Sensor and Precision Front-Ends
Precision analog front-ends in medical monitoring and instrumentation need low-noise supplies to avoid corrupting microvolt-level signals. The TLV70018DCKR's high PSRR (68 dB at 1 kHz) and low output noise from its bandgap reference make it suitable for powering amplifiers, ADC references, and sensor bridges from noisier system rails. Its 5.5 V maximum input suits both portable battery designs and 5 V industrial logic rails. Budget power dissipation: at 5 V in, 1.8 V out, and 200 mA, the SC-70 dissipates 0.64 W, requiring thermal review.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for TLV70018DCKR — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | TLV71318DCKR | TLV70030DCKR | TLV70025DCKR | TLV70012DCKR | NCP702SN18T1G |
|---|---|---|---|---|---|---|
| Package | SC-70-5 (DCK) | SC-70-5 (DCK) - same | SC-70-5 (DCK) - same | SC-70-5 (DCK) - same | SC-70-5 (DCK) - same | SC-70-5 - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | onsemi |
| Output Voltage | 1.8 V fixed | 1.8 V fixed | 3.0 V fixed | 2.5 V fixed | 1.2 V fixed | 1.8 V fixed |
| Output Current | 200 mA | 150 mA | 200 mA | 200 mA | 200 mA | 150 mA |
| Quiescent Current | 31 uA typ | 60 uA typ | 31 uA typ | 31 uA typ | 31 uA typ | 2.5 uA typ |
| Input Voltage Range | 2 V to 5.5 V | 1.4 V to 5.5 V | 2 V to 5.5 V | 2 V to 5.5 V | 2 V to 5.5 V | 1.7 V to 5.5 V |
Pangunahing mga Pagkakaiba
- 200 mA output in a tiny SC-70-5 footprint (kumpara saTLV71318DCKR)
- Lower quiescent current than the newer family (kumpara saTLV71318DCKR)
- Enable pin for power sequencing (kumpara saNCP702SN18T1G)
Talaan ng Disenyo
Place 1-uF ceramic input and output capacitors as close to the IN and OUT pins as possible, with low-impedance ground returns. The TLV700 is stable with ceramic output capacitance, but excessive ESR or long trace inductance degrades transient response and PSRR. Follow the PCB layout guidelines in the TI TLV700 datasheet (SBVS056) typical application section.
The SC-70-5 package thermal resistance is approximately 250 C/W. At VIN = 5 V, VOUT = 1.8 V, IOUT = 200 mA, dissipation is 0.64 W, implying a junction rise of about 160 C - marginal at +125C ambient. For large VIN-VOUT differentials, reduce load current, add copper pour on all pins, or consider a pre-regulating buck converter to share the drop.
The EN pin is active high; leaving it floating may leave the regulator off. Tie EN to IN for always-on operation or drive it from a logic rail for sequencing - check the input-voltage tolerance of the EN pin against the driving rail. Do not exceed 5.5 V input, and ensure the input source does not overshoot during hot-plug or inductive load transients.
Impormasyon ng Pagsunod sa Kautusan
RoHS compliant per TI product page. This standard (non-Q1) TLV700 variant is not AEC-Q100 qualified; choose a TI Q1 LDO for automotive.
