TPS7A6633QDGNRQ1 - 150mA 40V Off-Battery LDO | Texas Instruments
料号： TPS7A6633QDGNRQ1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.21 | $12.10 |
| 100 | $0.98 | $98.00 |
| 500 | $0.82 | $410.00 |
| 1,000 | $0.71 | $710.00 |
TPS7A6633QDGNRQ1 概述
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. Within the broader taxonomy of voltage regulators, LDOs sit alongside switching regulators (buck/boost/buck-boost converters) as a sub-category of power management ICs (PMICs). Unlike a switching DC-DC converter, an LDO dissipates the VIN-VOUT difference as heat and therefore introduces no switching ripple, which is why off-battery automotive rails favor LDOs for noise-sensitive MCU cores and CAN transceivers.
Key features of the TPS7A6633QDGNRQ1 include an integrated power-good (PG) open-drain output for MCU reset sequencing, short-circuit and over-current protection, thermal shutdown, and an input voltage tolerance that survives 45V load-dump transients. The HVSSOP-8 (DGN) PowerPAD package keeps thermal resistance low for sustained 150-mA loads in cramped under-hood layouts.
The device uses a p-channel pass architecture with an internal bandgap reference, achieving tight output accuracy across the -40C to +125C automotive grade-1 temperature range. The reset delay on power-up (programmed by an external capacitor on the NR/SS pin) and the PG output combine to form a deterministic power-on sequence for the host MCU and CAN/LIN transceivers.
Typical applications include always-on body-control modules, HVAC clusters, instrument-panel MCUs, RKE receivers, and lighting controllers where the part sits directly on the unswitched 12V battery rail. The wide VIN tolerance also suits industrial 24V PLC supplies with similar standby-power constraints.
When designing with this part, place the input and output bulk capacitors as close to the IC as possible and use a low-ESR ceramic on the output to maintain loop stability; an input capacitor of at least 0.1 uF plus the recommended output capacitance is mandatory. Choose the PG pull-up to a logic-compatible rail (typically VOUT itself) so the host MCU sees a clean reset during crank and cold-start events.
This page synthesizes distributor pricing, AEC-Q100 alternative coverage, and practical PCB layout notes not found in the manufacturer datasheet alone.
直接替换替代料： TPS7A6633QDGNRQ1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TPS7A6633QDGNRQ1 （相同外形与封装尺寸） ——差异在于 MSL Level, Package.
快速对比工具——选择替代料号进行并排对比：
TPS7A6650QDGNRQ1
✅ 直接替换✓ 有现货
$1.24 / 个
查看数据手册 →TPS7A6633QDGNRQ1
✅ 直接替换✓ 有现货
$0.71 / 个
查看数据手册 →TPS7A6650QDGNRQ1
✅ 直接替换✓ 有现货
$1.24 / 个
查看数据手册 →TPS7A6633QDGNRQ1 最大额定值与电气特性
| 输出类型 | Fixed |
| 输出电压 | 3.3 V |
| 最大输出电流 | 150 mA |
| 输入电压范围 | 4 V to 40 V |
| Transient Input Tolerance | 45 V (load-dump) |
| 压差电压 | 200 mV typical at 100 mA |
| Quiescent Current (no load) | 12 uA typical |
| 电源正常输出 | Open-drain, active-low |
| 工作温度 | -40C to +125C |
| 封装 | 8-pin HVSSOP (DGN) with PowerPAD |
| 安装类型 | Surface Mount |
| MSL 等级 | 2 |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
| Automotive Qualification | AEC-Q100 Grade-1 |
TPS7A6633QDGNRQ1 引脚配置
| 引脚 1 | IN — Input voltage (4V to 40V) |
| 引脚 2 | IN — Input voltage (tie to pin 1) |
| 引脚 3 | PG — Power-good open-drain output (active low) |
| 引脚 4 | NR/SS — Noise-reduction / soft-start capacitor |
| 引脚 5 | GND — Ground |
| 引脚 6 | EN — Enable (active high) |
| 引脚 7 | OUT — Regulated 3.3V output |
| 引脚 8 | OUT — Regulated 3.3V output (tie to pin 7) |
典型应用
TPS7A6633QDGNRQ1 适用于 7 应用s: Automotive Body Control Module (BCM), HVAC Cluster / Instrument Panel MCU, Remote Keyless Entry (RKE) Receiver, CAN/LIN Transceiver Standby Rail, Interior Lighting Controller, Industrial 24V PLC Logic Supply, Battery-Backed Sensor / Telematics Unit.
Automotive Body Control Module (BCM)
The TPS7A6633QDGNRQ1 is a primary standby LDO choice for automotive body control modules that remain powered after key-off. Its 4V-40V VIN range tolerates direct connection to the unswitched 12V battery rail including 45V load-dump transients, while the 12 uA quiescent current keeps the BCM's standby draw under automotive quiescent-current budgets. The integrated open-drain power-good output feeds the host MCU's reset input for deterministic wake-up sequencing across -40C to +125C grade-1 AEC-Q100 environments.
推荐
HVAC Cluster / Instrument Panel MCU
The TPS7A6633QDGNRQ1 powers the HVAC control cluster and instrument-panel MCU from the permanent 12V battery rail. Its 150-mA output comfortably supplies a small Cortex-M0/M4 MCU plus backlight drivers and rotary encoder logic. The fixed 3.3V output eliminates external feedback resistors and reduces BOM count, while the 200 mV typical dropout at 100 mA keeps regulation margin tight even during engine cranking when the battery briefly drops below 6V.
推荐
Remote Keyless Entry (RKE) Receiver
The TPS7A6633QDGNRQ1 is ideal for always-on RKE receiver modules that listen for low-power RF transmissions while the vehicle is parked. The 12 uA quiescent current keeps the receiver on for weeks without draining the vehicle battery, and the 40V VIN tolerance handles jump-start events from a donor vehicle. The integrated PG output signals the receiver MCU when the rail is in regulation, supporting fast wake-up from standby to active RX mode.
推荐
CAN/LIN Transceiver Standby Rail
The TPS7A6633QDGNRQ1 provides a clean 3.3V rail for CAN/LIN transceivers and standby microcontrollers in body and chassis ECUs. Its 4V to 40V VIN range is wide enough to ride through cold-crank events where battery voltage sags to 6V, and the 12 uA Iq supports partial networking where the ECU sleeps with the transceiver still active. AEC-Q100 grade-1 qualification ensures reliability across the automotive temperature range.
推荐
Interior Lighting Controller
The TPS7A6633QDGNRQ1 powers interior lighting controllers (door modules, footwell LEDs, ambient RGB controllers) directly from the battery rail. The 150-mA output handles an MCU plus several LED driver logic inputs, while the PowerPAD HVSSOP-8 package keeps the part cool even when the LED chain pulls peak current. AEC-Q100 grade-1 qualification and 45V load-dump tolerance match the harsh transient environment of automotive body wiring.
推荐
Industrial 24V PLC Logic Supply
Beyond automotive, the TPS7A6633QDGNRQ1 fits industrial 24V PLC logic rails where a wide-VIN, low-Iq LDO is needed to power a small MCU or sensor interface. The 40V VIN handles 24V industrial bus transients and inductive kickback from solenoids, while the 12 uA Iq supports always-on field sensors in battery-backed PLC racks. The HVSSOP-8 DGN footprint shares the same TI tool footprint as the TPS7A6650 (5V) variant for platform reuse.
推荐
Battery-Backed Sensor / Telematics Unit
The TPS7A6633QDGNRQ1 is well-suited for telematics control units (TCUs) and battery-backed sensor nodes that remain powered after the vehicle is parked. Its 12 uA quiescent current keeps a GPS/4G telematics MCU in standby listening for wake events, and the 40V VIN with 45V transient tolerance handles alternator load-dump without external TVS protection. The PG output provides a clean rail-good signal to the telematics MCU for wake-up sequencing.
推荐
推荐产品汇总
工程参考数据： TPS7A6633QDGNRQ1 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TPS7A6650QDGNRQ1 |
|---|---|---|
| Package | HVSSOP-8 (DGN) with PowerPAD | HVSSOP-8 (DGN) - same |
| Brand | Texas Instruments | Texas Instruments |
| Output Voltage | 3.3 V fixed | 5.0 V fixed |
| Maximum Output Current | 150 mA | 150 mA |
| Input Voltage Range | 4 V to 40 V | 4 V to 40 V |
| Transient Input Tolerance | 45 V | 45 V |
| Quiescent Current (no load) | 12 uA | 12 uA |
| Power Good Output | Yes (open-drain) | Yes (open-drain) |
| Automotive Qualification | AEC-Q100 Grade-1 | AEC-Q100 Grade-1 |
| Operating Temperature | -40C to +125C | -40C to +125C |
关键差异点
- Off-battery 40V VIN with 45V load-dump tolerance in HVSSOP-8 （对比 TPS70933QDBVRQ1)
- Integrated power-good output for MCU reset sequencing （对比 TPS7A6650QDGNRQ1)
- 12 uA ultra-low quiescent current for standby ECU applications （对比 TPS7A6650QDGNRQ1)
设计说明
Minimize equivalent series inductance (ESL) and ESR on input/output capacitors to maximize PSRR and stability. Place each capacitor as close as possible to the device and on the same side of the PCB as the regulator itself - TI explicitly recommends this layout in the TPS7A66-Q1 datasheet application section. A 0.1 uF ceramic in parallel with the bulk output capacitor is strongly advised for high-frequency noise rejection.
The HVSSOP-8 (DGN) PowerPAD must be soldered to a sufficient copper pour (recommended >= 1 square inch on the top layer plus thermal vias to a bottom-layer pour) to keep the junction temperature within the -40C to +125C AEC-Q100 grade-1 envelope. At VIN=14V, VOUT=3.3V, and 150 mA load, the regulator dissipates approximately 1.6 W, which the PowerPAD can handle with adequate copper but not in a thermally starved footprint.
Do not omit the input capacitor - the TPS7A6633QDGNRQ1 requires a minimum 0.1 uF ceramic on IN for stable operation, especially during cold-crank VIN sag events. Tie the dual IN pins together (pins 1 and 2) and the dual OUT pins together (pins 7 and 8) at the IC body to avoid uneven current sharing and voltage drift. The PG pull-up resistor must connect to a logic-compatible rail (typically VOUT) - leaving PG floating causes false reset assertions to the host MCU.
For load-dump survivability beyond the part's intrinsic 45V tolerance, add a TVS diode (e.g., SMAJ33CA) at the battery rail ahead of the LDO input to clamp transients below 45V. The TPS7A6633QDGNRQ1 handles 45V internally but TVS protection extends reliability for severe jump-start and reverse-battery events. A reverse-polarity P-FET at the input is also recommended for automotive battery-rail designs.
合规信息
AEC-Q100 Grade-1 qualified for automotive applications. RoHS and REACH compliant per TI product page. Lead-free and halogen-free per package markings.
