LP5900TLX-1.8 - 150mA 1.8V LDO Regulator, 4-DSBGA | Texas Instruments
부품 번호: LP5900TLX-1.8 ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $0.52 | $0.52 |
| 10 | $0.47 | $4.70 |
| 100 | $0.38 | $38.00 |
| 500 | $0.32 | $160.00 |
| 1,000 | $0.27 | $270.00 |
| 3,000 | $0.23 | $690.00 |
LP5900TLX-1.8 개요
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input-to-output voltage differential is very small. LDOs belong to the broader category of linear regulators, which in turn are a sub-class of voltage regulators and the larger family of power management ICs. Unlike switching regulators, LDOs do not generate switching noise and therefore are preferred in noise-sensitive analog and RF signal chains where power-rail cleanliness directly impacts system performance.
Key features of the LP5900TLX-1.8 include its tiny 1 mm x 1 mm DSBGA footprint, which is among the smallest LDO packages available, making it ideal for space-constrained wearables, IoT endpoints, and sensor modules. The device incorporates internal soft-start and current-limit protection, an active-high enable pin for power sequencing, and excellent line and load transient response with minimal output excursion. Its no-bypass-capacitor architecture simplifies BOM and reduces PCB area. The wide operating temperature range of -40 °C to +125 °C supports both consumer and industrial environments.
The LP5900 uses an advanced CMOS architecture with a high-bandwidth feedback loop that suppresses input ripple and delivers fast settling. Its PSRR exceeds 85 dB at 1 kHz, attenuating switching-converter noise effectively, while the 6.5 µVRMS integrated noise floor keeps the regulator below the noise contribution of typical precision references and ADC references. This combination of small size and clean power is what distinguishes the LP5900 from generic LDOs.
Typical applications include powering RF transceivers, PLL/VCO synthesizers, image sensors, ADCs, DACs, audio codecs, and portable/wearable platforms where board area, quiescent current, and noise floor are all critical. It is also widely deployed in IoT sensor nodes, BLE/Wi-Fi modules, and medical wearables. Because the part requires no bypass capacitor and minimal external components, the LP5900 enables the smallest possible analog power footprint.
When designing with the LP5900TLX-1.8, observe that the DSBGA requires careful PCB layout: the device uses balls as terminals, and a recommended land pattern per JEDEC plus a clean ground plane are needed for proper thermal and electrical performance. Output capacitor ESR must remain within the manufacturer's range to preserve stability.
This page synthesizes distributor pricing, drop-in alternatives, application recommendations, and design notes beyond what is in the manufacturer datasheet to accelerate component selection and PCB implementation.
드롭인 대체품: LP5900TLX-1.8 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: LP5900TLX-1.8 (동일 폼 팩터 및 풋프린트) — 차이점: Package, Input Voltage Range, Maximum Output Current, Dropout Voltage, Enable Pin.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
LP5900TLX-1.8/NOPB
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LP5900TL-1.8/NOPB
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LP5900TLX-1.5/NOPB
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LP5900TLX-2.5/NOPB
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LP5900TLX-3.3/NOPB
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LP5900TLX-3.0/NOPB
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
LP5900TLX-1.8 최대 정격 & 전기적 특성
| 출력 유형 | Fixed |
| Fixed Output Voltage | 1.8 V |
| 최대 출력 전류 | 150 mA |
| 입력 전압 범위 | 2.5 V to 5.5 V |
| 드롭아웃 전압 | 90 mV typical at 150 mA |
| 출력 노이즈 | 6.5 uVrms (10 Hz to 100 kHz) |
| PSRR | 85 dB at 1 kHz |
| Quiescent Current (enabled) | 25 uA typical |
| Quiescent Current (shutdown) | 1.1 uA typical |
| Output Voltage Tolerance | ±2 % |
| 인에이블 핀 | Yes (active-high) |
| 동작 온도 | -40 C to +125 C |
| 패키지 | 4-DSBGA (YZR) 1 mm x 1 mm |
| 실장 유형 | Surface Mount |
| Bypass Capacitor Required | No |
| RoHS 상태 | Compliant |
| Input Capacitor | 0.1 uF ceramic minimum |
| Output Capacitor | 1 uF ceramic low-ESR |
LP5900TLX-1.8 핀 구성
| 핀 A1 | VIN — Input supply voltage (2.5 V to 5.5 V) |
| 핀 A2 | GND — Ground |
| 핀 B1 | EN — Enable (active-high) |
| 핀 B2 | VOUT — Regulated output voltage (1.8 V fixed) |
일반적인 애플리케이션
LP5900TLX-1.8 적합 용도: 6 애플리케이션s: RF Transceiver Power Rail, Image Sensor Power Supply, Wearable / Fitness Tracker Power, Precision ADC Reference Buffer, IoT Sensor Node Power, Audio Codec Analog Supply.
RF Transceiver Power Rail
The LP5900TLX-1.8 powers 1.8 V RF transceiver rails where its 6.5 µVRMS noise and 85 dB PSRR at 1 kHz attenuate switching-converter ripple and phase-locked loop spurs. With 150 mA available it can supply a complete sub-GHz or 2.4 GHz radio section including the synthesizer and PA control logic. Placed between a 3.3 V buck and the radio's 1.8 V pin with a 1 µF ceramic output cap, it adds no switching noise while drawing 25 µA quiescent - critical for battery-powered IoT radios spending most of the time in sleep. The DSBGA-4 1 mm x 1 mm footprint fits beside the radio SoC without crowding the antenna keep-out region.
추천
Image Sensor Power Supply
The LP5900TLX-1.8 supplies the 1.8 V analog rail of CMOS image sensors where its 6.5 µVRMS integrated noise floor stays below the sensor's analog dynamic range. The 85 dB PSRR at 1 kHz rejects noise from upstream switching regulators that share the same PCB. With 150 mA output capability it drives a typical 1/3-inch image sensor plus its ADC reference buffer. The DSBGA-4 1 mm x 1 mm footprint lets the LDO sit within 2 mm of the sensor's supply pin, minimizing trace impedance and PSRR loss at high frequency - essential for surveillance cameras and machine-vision front-ends.
추천
Wearable / Fitness Tracker Power
The LP5900TLX-1.8 delivers the 1.8 V rail powering sensor hubs, BLE radios, and display drivers in fitness bands and smart watches where its 25 µA quiescent current and 1.1 µA shutdown current extend battery life. Its 1 mm x 1 mm DSBGA-4 footprint occupies negligible PCB real estate on small wearable mainboards. The 6.5 µVRMS noise performance keeps optical heart-rate sensor photodiode bias clean, while the -40 to +125 °C operating range covers both skin-temperature operation and reflow profiles during manufacture.
추천
Precision ADC Reference Buffer
The LP5900TLX-1.8 powers precision SAR and delta-sigma ADC reference inputs where its 6.5 µVRMS noise stays below the ADC's noise floor. The 85 dB PSRR at 1 kHz eliminates switching ripple from upstream rails feeding the reference. The DSBGA-4 1 mm x 1 mm footprint enables co-location with the ADC's REF pin, minimizing PCB trace resistance and IR drop that would degrade ADC accuracy. Suitable for 16- to 24-bit precision data-acquisition front-ends in industrial sensors and instrumentation.
추천
IoT Sensor Node Power
The LP5900TLX-1.8 supplies 1.8 V to microcontroller and sensor sections of battery-powered IoT sensor nodes where its 1.1 µA shutdown current enables multi-year battery life. Its 25 µA enabled quiescent current is among the lowest for a 150 mA LDO in this package size, allowing always-on power domains that consume only tens of microamperes. The DSBGA-4 1 mm x 1 mm footprint fits on coin-cell-powered sensor PCBs alongside BLE modules. Wide 2.5-5.5 V input allows direct connection to a CR2032 boost output or a single Li-Ion cell.
추천
Audio Codec Analog Supply
The LP5900TLX-1.8 powers the 1.8 V analog supply rail of audio codecs and Class-D amplifiers where its 6.5 µVRMS integrated noise prevents audible hiss in headphone outputs. The 85 dB PSRR at 1 kHz rejects switching noise from the system's main DC-DC converter. With 150 mA available it can drive the analog section of a typical Bluetooth audio codec plus a small line-driver. The DSBGA-4 1 mm x 1 mm package enables tight placement near the codec's AVDD pin for optimal PSRR performance.
추천
추천 제품 요약
엔지니어링 참조 데이터: LP5900TLX-1.8 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | LP5900TLX-1.8/NOPB | LP5900TL-1.8/NOPB | LP5900TLX-1.5/NOPB | LP5900TLX-2.5/NOPB | LP5900TLX-3.3/NOPB |
|---|---|---|---|---|---|---|
| Package | 4-DSBGA (YZR) 1x1 | 4-DSBGA (YZR) 1x1 - same | 4-DSBGA (YZR) 1x1 - same | 4-DSBGA (YZR) 1x1 - same | 4-DSBGA (YZR) 1x1 - same | 4-DSBGA (YZR) 1x1 - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Voltage | 1.8 V | 1.8 V | 1.8 V | 1.5 V | 2.5 V | 3.3 V |
| Output Current | 150 mA | 150 mA | 150 mA | 150 mA | 150 mA | 150 mA |
| Output Noise (10 Hz to 100 kHz) | 6.5 uVrms | 6.5 uVrms | 6.5 uVrms | 6.5 uVrms | 6.5 uVrms | 6.5 uVrms |
| PSRR at 1 kHz | 85 dB | 85 dB | 85 dB | 85 dB | 85 dB | 85 dB |
| Quiescent Current (enabled) | 25 uA | 25 uA | 25 uA | 25 uA | 25 uA | 25 uA |
| Dropout Voltage at 150 mA | 90 mV typical | 90 mV typical | 90 mV typical | 90 mV typical | 90 mV typical | 90 mV typical |
| Bypass Capacitor Required | No | No | No | No | No | No |
주요 차별점
- Smallest 150 mA LDO footprint with no bypass capacitor required (vs LP5907 (USMD-4))
- Industry-leading noise-to-size ratio at 150 mA (vs Standard CMOS LDOs (e.g. MCP1700))
- Wide fixed-output voltage family on identical footprint (vs Discrete fixed-voltage regulators from other vendors)
설계 노트
Estimated: the LP5900TLX-1.8 uses a 4-ball DSBGA (1 mm x 1 mm) with a non-standard ball pitch. The land pattern should follow TI's recommended NSMD pads (0.225 mm diameter ball land, 0.4 mm pitch). Solder mask-defined (SMD) pads are not recommended for this small package - use NSMD with a 0.025 mm to 0.05 mm mask expansion. Place the 0.1 uF input capacitor and 1 uF output capacitor within 1 mm of their respective balls, with via-in-pad recommended for the GND ball (A2) to provide both thermal relief and low-inductance ground return. A continuous ground plane on layer 2 is critical for PSRR performance.
Estimated: at VIN = 3.3 V, VOUT = 1.8 V, and IOUT = 150 mA, power dissipation is approximately (3.3 - 1.8) * 0.150 = 225 mW. The DSBGA-4 package has theta_JA of approximately 180 C/W on a standard JEDEC test board, so junction temperature rise is ~40 C above ambient - acceptable up to ~85 C ambient. Above 100 mA load, place thermal vias under the GND ball (A2) to spread heat into the inner ground plane. Avoid placing the LDO directly adjacent to high-power devices; a 1 mm thermal keep-out is recommended.
Output capacitor ESR must be within 5 mOhm to 500 mOhm to maintain stability - use X5R or X7R ceramic, not Y5V. Do not use tantalum or polymer capacitors whose ESR is typically too low. Do not exceed 6 V on VIN (5.5 V nominal + transient) or the part will be damaged. Ensure EN (B1) is driven high with a clean logic signal - leaving EN floating can cause intermittent output. The enable pin has a 200 kOhm internal pull-down but external drive is recommended for predictable sequencing.
규정 준수 정보
RoHS and REACH compliant per TI product page (LP5900TLX-1.8/NOPB has NOPB suffix indicating lead-free and RoHS-compliant). Halogen-free per TI documentation. Not AEC-Q100 qualified - the standard part is for industrial/consumer use; for automotive applications choose the LP5900-Q1 variants. Conflict-minerals compliant per TI supplier declarations.
