TPS7A7002DDA - 3A Low-VIN LDO Regulator w/ Enable | Texas Instruments
부품 번호: TPS7A7002DDA ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.07 | $30.70 |
| 100 | $2.71 | $271.00 |
| 500 | $2.44 | $1,220.00 |
| 1,000 | $2.18 | $2,180.00 |
TPS7A7002DDA 개요
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is only marginally higher than the output. In the broader power-management hierarchy, an LDO sits beneath switching regulators: a switcher first steps down the bus voltage with high efficiency, then an LDO cleans the residual ripple and provides a low-noise rail. This two-stage architecture is now standard for powering noise-sensitive analog, RF, and digital load circuits from intermediate bus voltages such as 3.3 V or 5 V.
Key features of the TPS7A7002 include 1 uA ground current in shutdown for battery-powered applications, current-limit and thermal-shutdown protection, an active-high EN pin for power sequencing, and a stable output with low-ESR ceramic output capacitors. The dropout voltage at 2 A is only 380 mV maximum, and at 3 A is limited to 600 mV maximum, allowing the regulator to hold regulation in headroom-constrained designs where VIN approaches VOUT. The HSOP-8 PowerPad package provides a low thermal-resistance path, dissipating up to several watts continuously without external heatsinking.
The TPS7A7002 uses a PNP pass architecture that achieves very low dropout and excellent transient response when paired with ceramic output capacitors. The internal reference, soft-start, and current-limit blocks are designed for stable operation across the full -40 C to +125 C junction temperature range. The adjust pin allows the output to be programmed anywhere from 0.5 V to 5 V by R1/R2 feedback network, while the EN pin can be used for power sequencing across multiple rails.
Typical applications include powering FPGA core and I/O rails, ASIC and DSP core supplies, post-regulation after a switching converter, low-voltage distributed power architectures in telecom and networking equipment, and any application that requires a high-current, low-noise point-of-load rail from a 1.5 V, 1.8 V, 2.5 V, 3.3 V, or 5 V intermediate bus.
When designing with this device, ensure that the PCB copper area under the exposed pad is sufficient to keep the junction temperature within the safe operating area under worst-case load. Use 1% feedback resistors and a 10 uF or larger low-ESR ceramic output capacitor placed as close to the VOUT pin as possible; a feedforward capacitor across the top feedback resistor improves noise and transient performance.
드롭인 대체품: TPS7A7002DDA — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
TPS7A7002DDAR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TPS7A7001DDA
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TPS7A7002DDA.B
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TPS7A7002DDA-Q1
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
TPS7A7002DDA 최대 정격 & 전기적 특성
| 출력 구성 | Positive, Adjustable |
| 출력 전압 범위 | 0.5 V to 5 V |
| 최대 출력 전류 | 3 A |
| Input Voltage Range (VIN) | 1.425 V to 6.5 V |
| Dropout Voltage at 2 A | 380 mV (maximum) |
| Dropout Voltage at 3 A | 600 mV (maximum) |
| Ground Current (Shutdown) | 1 uA |
| 인에이블 핀 | Yes (active-high) |
| Current Limit Protection | Yes |
| 열 차단 | Yes |
| 동작 접합 온도 | -40 C to +125 C |
| 패키지 | 8-Pin SO PowerPad (HSOIC EP / DDA) |
| 실장 유형 | Surface Mount |
| Output Capacitor Requirement | Low-ESR ceramic, stable |
| RoHS 상태 | Compliant |
TPS7A7002DDA 핀 구성
| 핀 1 | ADJ — Feedback node for adjustable output (connect to VOUT via resistor divider) |
| 핀 2 | EN — Enable input (active-high; pull high to enable regulator) |
| 핀 3 | VIN — Input supply voltage (1.425 V to 6.5 V) |
| 핀 4 | VIN — Input supply voltage (tie to pin 3 on PCB; doubled for low impedance) |
| 핀 5 | GND — Ground |
| 핀 6 | VOUT — Regulated output voltage |
| 핀 7 | VOUT — Regulated output voltage (tie to pin 6 on PCB; doubled for low impedance) |
| 핀 8 | NC — No-connect (per datasheet; pin not bonded to die) |
| 핀 9 | EP — Exposed thermal pad (solder to GND copper pour for heatsinking) |
일반적인 애플리케이션
TPS7A7002DDA 적합 용도: 6 애플리케이션s: FPGA Core and I/O Rail Point-of-Load, ASIC / DSP Core Voltage Post-Regulation, Telecom and Networking Card Power, Test and Measurement Instrumentation Rails, Industrial Sensor and Module Power, Solid-State Drive and Storage Controller Power.
FPGA Core and I/O Rail Point-of-Load
The TPS7A7002DDA's 3 A output and 0.5 V to 5 V adjustable range directly support modern FPGA core voltages (0.85 V, 1.0 V, 1.2 V, 1.5 V, 1.8 V), auxiliary supplies, and I/O banks. With VIN as low as 1.425 V it can be powered from a common 3.3 V or 5 V system rail, then post-regulate to a clean core rail without the ripple and noise of an additional switcher. The 380 mV dropout at 2 A is small enough to maintain regulation through load transients common in FPGA workloads; the exposed pad provides the thermal headroom for sustained 3 A delivery. Place a 10 uF low-ESR ceramic on VOUT within 5 mm of the IC and route feedback traces away from switching nodes to preserve PSRR.
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ASIC / DSP Core Voltage Post-Regulation
After a high-efficiency switching converter steps down a 12 V or 5 V bus, the TPS7A7002DDA can post-regulate the rail to the tight tolerance required by ASIC and DSP cores. Its 1 uA shutdown current is helpful in mobile or battery-backed systems where the load is held in reset, and the current-limit and thermal-shutdown blocks protect the ASIC from over-current faults during bring-up. Pair the TPS7A7002DDA with a fast-transient upstream buck (such as the TPS62841DLCR) where the buck supplies bulk current at high efficiency and the LDO provides the low-noise, fast-transient-response rail. TI recommends a 4.7 uF to 22 uF low-ESR ceramic output capacitor for stability across the full output range.
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Telecom and Networking Card Power
The TPS7A7002DDA is well suited to networking line cards and base-station equipment that require a 3.3 V-to-2.5 V, 3.3 V-to-1.8 V, or 5 V-to-3.3 V point-of-load supply for transceivers, SERDES, and PHY devices. Its 1.425 V minimum VIN allows direct 1.5 V bus operation, while its 6.5 V maximum VIN covers legacy 5 V rails; this flexibility reduces the BOM for cards that must support multiple bus voltages. Protection features (current limit, thermal shutdown) guard against the backplane faults common in hot-plug telecom systems. The SO PowerPad-8 package provides the low thermal resistance needed to dissipate the (VIN-VOUT) x IOUT losses at 3 A continuous draw.
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Test and Measurement Instrumentation Rails
Bench-top instruments and ATE systems need clean, accurate low-voltage rails to power precision ADCs, DACs, and reference circuits. The TPS7A7002DDA acts as a post-regulator on a switcher output to remove residual switching ripple, presenting a quiet rail to noise-sensitive analog blocks. Its 0.5 V minimum output references modern precision converters (such as 1.8 V or 1.2 V ADC supply domains) and can be trimmed with the ADJ pin for fine adjustment. The 1 uA shutdown current also supports battery-powered field-instrument scenarios where standby power matters most. Use 1% feedback resistors and a 10 uF X7R 0805 or larger ceramic on VOUT for clean transient response.
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Industrial Sensor and Module Power
Industrial sensor modules, programmable logic controllers, and factory-automation I/O cards often need a stable 24 V input down to 5 V, 3.3 V, or 2.5 V rails. The TPS7A7002DDA can be used after an isolation barrier or a wide-VIN front-end converter to deliver a clean, low-ripple rail to sensitive analog front-ends. The wide -40 C to +125 C junction temperature range supports harsh factory and outdoor environments, and the 3 A rating covers multi-channel sensor aggregation modules that draw significant current per node. The exposed pad and SO PowerPad-8 package provide the thermal headroom needed for sustained operation at elevated ambient temperatures.
추천
Solid-State Drive and Storage Controller Power
SSDs, NVMe controllers, and high-speed NAND interface devices require sub-1 V rails with tight tolerance and low noise. The TPS7A7002DDA's 0.5 V minimum output and 3 A capability suit 0.8 V to 1.2 V controller and NAND I/O rails; the regulator post-cleans a switching converter's output to remove ripple that would otherwise couple into the high-speed serial interface. Its enable pin supports power-sequencing for multi-rail SSD designs where the controller must come up before the PHY. The exposed pad provides the thermal headroom required for continuous 3 A delivery in compact M.2 / U.2 form-factor SSDs where airflow is constrained.
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추천 제품 요약
엔지니어링 참조 데이터: TPS7A7002DDA — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TPS7A7002DDAR | TPS7A7001DDA | TPS7A7002DDA-Q1 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 8-SO PowerPad (DDA) | 8-SO PowerPad (DDA) - same | 8-SO PowerPad (DDA) - same | 8-SO PowerPad (DDA) - same |
| Maximum Output Current | 3 A | 3 A | 3 A | 3 A |
| Input Voltage Range | 1.425 V to 6.5 V | 1.425 V to 6.5 V | 1.425 V to 6.5 V | 1.425 V to 6.5 V |
| Output Voltage Range | 0.5 V to 5 V | 0.5 V to 5 V | 0.5 V to 5 V | 0.5 V to 5 V |
| Dropout at 3 A | 600 mV (max) | 600 mV (max) | Slightly higher (~700 mV typ) | 600 mV (max) |
| Shutdown Ground Current | 1 uA | 1 uA | 1 uA | 1 uA |
| Automotive Grade (AEC-Q100) | No | No | No | Yes (AEC-Q100 qualified) |
| Carrier Packaging | Tube (78 pcs/tube) | Tape & Reel (2500 pcs/reel) | Tube | Tube or Tape & Reel |
주요 차별점
- Lowest dropout in TI's 3 A SO PowerPad-8 family (vs TPS7A7001DDA)
- AEC-Q100 option in the same footprint (vs TPS7A7002DDA-Q1)
- Same die in tape-and-reel versus tube shipping (vs TPS7A7002DDAR)
설계 노트
At VIN=5 V, VOUT=3.3 V, and 3 A continuous load, power dissipation is approximately 5.1 W. The 8-SO PowerPad (DDA) package has a thermal resistance of approximately 35 C/W (theta_JA) on a 1-oz, JEDEC-standard 4-layer test board per typical LDO datasheet values. Solder the exposed pad (pin 9 / EP) to a copper pour of at least 1 square inch on top and bottom layers, with thermal vias to inner copper planes, to keep theta_JA near 35 C/W. Estimated: junction temperature rise above ambient = PDISS x theta_JA = 5.1 W x 35 C/W = ~178 C; this exceeds the 125 C limit, so the application must either reduce IOUT, lower VIN toward VOUT, or substantially expand PCB copper area.
Place the input capacitor (10 uF low-ESR ceramic) as close as possible to the VIN pins (3 and 4) and the output capacitor (10 uF low-ESR ceramic, X7R) as close as possible to the VOUT pins (6 and 7). Minimize the loop area between the input capacitor, the IC, and the output capacitor to reduce parasitic inductance and improve high-frequency PSRR. Keep the feedback trace to the ADJ pin (pin 1) short and routed away from noisy switching nodes and inductors; place the top feedback resistor close to the ADJ pin and add a 100 pF feedforward capacitor across it for improved transient response and noise performance.
Do not omit the output capacitor or use a high-ESR electrolytic capacitor - the TPS7A7002 requires a low-ESR ceramic output capacitor for stability. Ensure VIN does not exceed 6.5 V (or drop below 1.425 V) at any point, including transients during hot-plug or load-dump events. The exposed pad must be soldered to ground copper for thermal dissipation; if left floating the regulator will thermal-shutdown prematurely at high currents. Use 1% or better feedback resistors to maintain output voltage accuracy, and add a small feedforward capacitor across the top feedback resistor to optimize noise and transient response per typical LDO datasheet recommendations.
규정 준수 정보
RoHS compliant and lead-free per the TI TPS7A7002 product page. Standard TPS7A7002DDA is not AEC-Q100 qualified; the TPS7A7002DDA-Q1 suffix provides AEC-Q100 automotive qualification in the same package.
