TPS62841DLCR - 750mA, 60nA IQ Step-Down Converter | Texas Instruments
부품 번호: TPS62841DLCR ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.28 | $12.80 |
| 100 | $1.05 | $105.00 |
| 500 | $0.92 | $460.00 |
| 1,000 | $0.78 | $780.00 |
| 3,000 | $0.65 | $1,950.00 |
TPS62841DLCR 개요
A step-down (buck) converter is a type of switched-mode power supply (SMPS) that efficiently steps a higher DC input voltage down to a lower DC output voltage by rapidly switching an inductor/capacitor energy-transfer network. Within the broader power management taxonomy, a buck converter sits under DC-DC converters, alongside boost, buck-boost, and LDO topologies. Compared with linear regulators, buck converters achieve much higher efficiency (often above 90%) at the cost of higher output ripple and switching noise; LDOs trade efficiency for ultra-clean output. The TPS62841 family targets the ultra-low-IQ segment where standby drain dominates total energy budget.
Key features include 60 nA typical quiescent current (120 nA in 100% mode), 750 mA continuous output current, an operating input range of 1.8 V to 6.5 V, and an adjustable output from 0.8 V upward via an external resistor divider. Power-Save Mode maximizes light-load efficiency, while DCS-Control provides clean PWM operation at higher loads. Integrated MOSFETs and internal compensation reduce external component count to one inductor plus input/output capacitors.
The TPS62841DLCR achieves peak efficiency above 90% at moderate loads and supports DCS-Control to cleanly power noise-sensitive radio blocks. Its 1.8 MHz typical switching frequency keeps the fundamental and harmonics well above the AM band, simplifying EMI filtering in space-constrained designs.
Typical applications include battery-powered IoT sensors, wearable health monitors, Bluetooth/Zigbee/LoRa nodes, energy-harvesting systems, and always-on microcontroller rails. The wide input range also supports USB and 2x AA/AAA alkaline source designs where quiescent drain directly determines operating life.
When designing with the TPS62841DLCR, ensure the inductor saturation current exceeds the peak switch current and that the input/output ceramic capacitors meet the datasheet's minimum effective capacitance after DC bias derating. Power-Save Mode is automatic, but the converter exits PFM at heavy load and re-enters cleanly; leave adequate copper for thermal relief of the exposed pad.
This page synthesizes distributor pricing, drop-in alternatives, application guidance, and design notes that complement - rather than duplicate - the official Texas Instruments datasheet.
드롭인 대체품: TPS62841DLCR — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: TPS62841DLCR (동일 폼 팩터 및 풋프린트) — 차이점: Output Voltage Range, Package, Topology, Input Voltage Range, Maximum Output Current.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
TPS62840DLCR
✅ 드롭인✓ 재고 있음
$1.21 / 개
데이터시트 보기 →TPS62842DLCR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TPS62841DLCT
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TPS62841DLCR
✅ 드롭인✓ 재고 있음
$0.65 / 개
데이터시트 보기 →TPS62840Q1DLCR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TPS62841DLCR 최대 정격 & 전기적 특성
| 토폴로지 | Synchronous Buck (Step-Down) Converter |
| 입력 전압 범위 | 1.8 V to 6.5 V |
| 출력 전압 범위 | 0.8 V to VIN (adjustable) |
| Output Current | 750 mA continuous |
| Quiescent Current (typical) | 60 nA (120 nA in 100% mode) |
| 스위칭 주파수 | 1.8 MHz typical (DCS-Control) |
| Control Mode | DCS-Control with Power-Save Mode |
| 효율 | Up to ~95% peak (load-dependent) |
| 동작 온도 | -40 C to +125 C |
| 패키지 | 8-VFDFN (DLC) - VSON-HR-8 |
| 실장 유형 | Surface Mount |
| MSL 레벨 | 2 (per JEDEC J-STD-020) |
| RoHS 상태 | Compliant |
| Lead-Free | Yes |
| 출력 유형 | Adjustable (Positive) |
TPS62841DLCR 핀 구성
| 핀 1 | PGND — Power ground for the internal low-side MOSFET |
| 핀 2 | VIN — Input supply voltage (1.8 V to 6.5 V) |
| 핀 3 | EN — Enable input (active high); pull high to enable converter |
| 핀 4 | FB — Feedback input to internal error amplifier; connect to external resistor divider |
| 핀 5 | AGND — Analog ground for control circuitry |
| 핀 6 | VOS — Voltage output sense / output voltage select (per datasheet) |
| 핀 7 | SW — Switch node - connect to external inductor |
| 핀 8 | SW — Switch node (second bond) - connect to external inductor |
| 핀 EP | Thermal Pad — Exposed thermal pad; connect to PGND for heatsinking |
일반적인 애플리케이션
TPS62841DLCR 적합 용도: 6 애플리케이션s: Battery-Powered IoT Sensor Nodes, Wearable Health Monitors, Energy-Harvesting Systems, Always-On Microcontroller Rails, Industrial Wireless Sensor Networks, Portable Medical and Point-of-Care Devices.
Battery-Powered IoT Sensor Nodes
The TPS62841DLCR's 60 nA quiescent current and 1.8-6.5 V input make it ideal for coin-cell and Li-ion powered IoT sensors that sleep most of the time. At 750 mA peak output, it can directly power MCU + radio bursts in BLE/Zigbee/LoRa nodes where sleep current dominates battery life. Compared with conventional 20 uA-IQ bucks, the 60 nA figure can extend a CR2032 sensor node life by 30-50%. Designers place the part between the battery and the MCU's main rail, using Power-Save Mode for sleeping loads and DCS-Control for active radio transmission bursts.
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Wearable Health Monitors
Wearables such as fitness bands and continuous glucose monitors require ultra-low standby drain and a tiny PCB footprint. The TPS62841DLCR's 1.8 MHz switching enables 1 uH inductors and small 0402 ceramics, achieving sub-10 mm x 10 mm total solution area. The 60 nA IQ preserves battery life during sleep, while the 750 mA output supports periodic sensor, display, and wireless bursts. Place the converter near the battery with a 1 uH shielded inductor to keep radiated EMI below the BLE 2.4 GHz band.
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Energy-Harvesting Systems
Energy-harvesting PMICs feeding small supercaps or thin-film batteries benefit from the TPS62841DLCR's 60 nA IQ, which is below the leakage of most storage elements. The 1.8-6.5 V input accepts a rectified solar, thermoelectric, or piezoelectric source directly without pre-regulation. The 750 mA peak output can store harvested energy or directly power a sensor/MCU during active periods. Power-Save Mode ensures the converter only switches when load demands energy, preserving harvested charge.
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Always-On Microcontroller Rails
Many battery-powered systems keep an MCU in deep sleep with periodic wake-ups; the TPS62841DLCR's 60 nA IQ ensures the regulator itself does not become the dominant standby drain. The 0.8 V adjustable output can directly power low-voltage MCU cores (e.g., 1.0 V, 1.2 V, 1.8 V) from a Li-ion or 2x AA source. The EN pin allows sequenced power-up with the rest of the system. Designers typically choose 1 uH inductors rated above saturation current with low DCR for highest efficiency.
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Industrial Wireless Sensor Networks
Industrial IoT nodes running sub-1 GHz radios (LoRa, Wireless M-Bus, IEEE 802.15.4g) operate from 3.6 V lithium or 2x AA cells and need clean power rails for TX bursts. The TPS62841DLCR's 1.8 MHz fundamental sits above the 169/433/868/915 MHz bands, simplifying EMI filtering. DCS-Control provides clean PWM at high load to avoid TX-spectrum spurious emissions. The wide 1.8-6.5 V input accepts industrial 24 V bus pre-regulation down to 5 V or 3.3 V directly.
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Portable Medical and Point-of-Care Devices
Handheld medical devices such as pulse oximeters, glucose meters, and infusion monitors demand long battery life and small size. The TPS62841DLCR's 60 nA IQ and tiny VFDFN-8 footprint enable multi-week runtime on 2x AAA cells. Its low-ripple DCS-Control output is clean enough to power precision analog front-ends and AFE ICs. The exposed thermal pad plus adequate copper pour handles the 750 mA peak without thermal shutdown in compact handheld enclosures.
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추천 제품 요약
엔지니어링 참조 데이터: TPS62841DLCR — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TPS62840DLCR | TPS62842DLCR | TPS62841DLCT | TPS62840Q1DLCR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-VFDFN (DLC, VSON-HR-8) | 8-VFDFN (DLC, VSON-HR-8) - same | 8-VFDFN (DLC, VSON-HR-8) - same | 8-VFDFN (DLC, VSON-HR-8) - same | 8-VFDFN (DLC, VSON-HR-8) - same |
| Input Voltage Range | 1.8 V to 6.5 V | 1.8 V to 6.5 V | 1.8 V to 6.5 V | 1.8 V to 6.5 V | 1.8 V to 6.5 V |
| Output Current | 750 mA | 750 mA | 750 mA | 750 mA | 750 mA |
| Quiescent Current (typ) | 60 nA | 60 nA | 60 nA | 60 nA | 60 nA (Q1 screened) |
| Switching Frequency | 1.8 MHz | 1.8 MHz | 1.8 MHz | 1.8 MHz | 1.8 MHz |
| Automotive Grade (AEC-Q100) | No | No | No | No | Yes (AEC-Q100) |
| Packaging Code | DLC (Tape & Reel, 3000) | DLC (Tape & Reel, 3000) | DLC (Tape & Reel, 3000) | DLT (Small Reel, 250) | DLC (Tape & Reel, 3000) |
주요 차별점
- Industry-leading 60 nA quiescent current in a 750 mA buck (vs TPS62840DLCR (same family, similar spec))
- DCS-Control with 1.8 MHz switching (vs TPS62823DLCR (same package, different family))
- Wide 1.8-6.5 V input supports diverse battery chemistries (vs TPS62840DLCR)
설계 노트
Estimated: at VIN = 3.7 V (Li-ion), VOUT = 1.8 V, IOUT = 500 mA, the TPS62841DLCR dissipates roughly (3.7 - 1.8) x 0.5 = 0.95 W. The 8-VFDFN package relies on the exposed thermal pad and PCB copper for heatsinking - use at least 100 mm^2 of 1 oz copper on the top layer connected to the EP. For 750 mA peak at the same conditions, expect ~1.4 W dissipation; derate ambient temperature to keep junction below 125 C.
Place the input ceramic capacitor (10 uF X7R, 10 V rating) as close as possible to the VIN and PGND pins to minimize switching-loop inductance. Place the output capacitor (10 uF X7R, 10 V) close to the inductor and the SW node. Keep the FB trace short and away from the SW node to avoid noise injection; a 5 mil trace with ground shielding on both sides is recommended. The exposed pad must be soldered to a PGND copper pour with multiple thermal vias.
Do not exceed the absolute maximum input voltage of 7 V (per TI datasheet) - transients above this rating will damage the IC. Avoid ceramic capacitors with too-low DC-bias capacitance; the output capacitor must remain above 3 uF after derating at VOUT = 0.8 V. Power-Save Mode produces a small output ripple (typ 20-30 mVpp) at light loads - if ripple-sensitive, add a small LC post-filter or use a bypass LDO. Do not leave EN floating; tie to VIN through a 100 kohm resistor if unused.
규정 준수 정보
RoHS and REACH compliant per TI product page. Lead-free reflow compatible per JEDEC J-STD-020 MSL 2. Not AEC-Q100 qualified - choose TPS62840Q1DLCR variant for automotive.
