TPS7B7702QPWPRQ1 - Dual 300mA 40V Automotive Antenna LDO | Texas Instruments
MPN: TPS7B7702QPWPRQ1 ✓ פעילTPS7B7702QPWPRQ1 סקירה
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. It belongs to the broader family of linear regulators (using a pass transistor in its linear region), which itself sits under the umbrella of power management ICs that include DC-DC converters, charge pumps, and battery management ICs. The TPS7B7702-Q1 is a dual-channel LDO with current sense, providing a compact, integrated solution for powering low-noise amplifiers (LNAs) in active antenna modules via a coax cable.
Key features include dual 300-mA outputs, independent adjustable output voltages from 1.5 V to 20 V, integrated current-sense outputs for load monitoring, low dropout voltage, and built-in protection (thermal shutdown, overcurrent limit, reverse-battery protection). The 16-pin HTSSOP with PowerPAD provides efficient heat dissipation for the demanding automotive underhood and cabin thermal envelope.
The TPS7B7702-Q1 architecture combines a precision bandgap reference, a high-gain error amplifier, and a low-loss sense element per channel to provide accurate regulation with simultaneous current monitoring. Each channel's sense output produces a current proportional to load, allowing an external ADC or comparator to detect open/short coax conditions without dissipating significant power.
Typical applications include automotive active antenna power supplies (AM/FM, DAB, GNSS, satellite radio), infotainment head units, and telematic control units requiring clean, regulated, monitored rails. The wide 4.5-40 V input range and 45 V load dump protection support direct connection to the 12 V automotive battery.
When designing with this device, place input/output ceramic capacitors close to the pins, solder the PowerPAD to a minimum 1 square inch of copper, and connect each current-sense pin through an external resistor to ground scaled for the downstream ADC's input range.
חלופות תחליף ישיר עבור TPS7B7702QPWPRQ1 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
TPS7B7701QPWPRQ1
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
TPS7B7702QPWPRQ1.A
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
TPS7B7702QPWPRQ1 דירוגים מרביים ומאפיינים חשמליים
| טופולוגיה | Dual-channel LDO with current sense |
| מספר יציאות | 2 |
| סוג פלט | Adjustable (each channel) |
| טווח מתח פלט | 1.5 V to 20 V |
| טווח מתח כניסה | 4.5 V to 40 V |
| Load Dump Protection | 45 V |
| Maximum Output Current (per channel) | 300 mA |
| Current Sense Output | Yes (one per channel) |
| טווח טמפרטורת פעולה | -40C to +125C |
| מארז | 16-pin HTSSOP (PowerPAD) |
| סוג הרכבה | Surface Mount |
| AEC-Q100 Qualification | Qualified (Grade 1, -40C to +125C) |
| סטטוס RoHS | Compliant |
| Lead-Free | Yes |
| Protection Features | Thermal shutdown, overcurrent limit, reverse-battery protection |
| Manufacturer | Texas Instruments |
| Series | TPS7B770x-Q1 |
תצורת פינים של TPS7B7702QPWPRQ1
| פין 1 | IN — Input supply voltage (4.5 V to 40 V) |
| פין 2 | IN — Input supply voltage (4.5 V to 40 V) |
| פין 3 | EN1 — Enable for channel 1 (active high) |
| פין 4 | ADJ1/FB1 — Adjust/feedback for channel 1 output voltage |
| פין 5 | SENSE1 — Current sense output for channel 1 |
| פין 6 | OUT1 — Regulated output for channel 1 (1.5 V to 20 V) |
| פין 7 | PGND — Power ground |
| פין 8 | OUT2 — Regulated output for channel 2 (1.5 V to 20 V) |
| פין 9 | SENSE2 — Current sense output for channel 2 |
| פין 10 | ADJ2/FB2 — Adjust/feedback for channel 2 output voltage |
| פין 11 | EN2 — Enable for channel 2 (active high) |
| פין 12 | NC — Not connected (per datasheet) |
| פין 13 | NC — Not connected (per datasheet) |
| פין 14 | NC — Not connected (per datasheet) |
| פין 15 | NC — Not connected (per datasheet) |
| פין 16 | PGND — Power ground / thermal pad connection |
יישומים טיפוסיים
TPS7B7702QPWPRQ1 מתאים עבור 6 יישוםs: Automotive Active Antenna Power Supply, AM/FM Radio Head Unit Power Tree, GNSS / Satellite Radio Antenna Module, DAB / DAB+ Digital Broadcast Antenna, Infotainment Telematics Control Unit (TCU), Vehicle-to-Everything (V2X) Antenna Module.
Automotive Active Antenna Power Supply
The TPS7B7702QPWPRQ1's dual 300-mA LDO channels with per-channel current sensing make it purpose-built for active antenna modules. It directly powers two low-noise amplifiers (LNAs) through a coax cable, with each channel's current-sense output reporting load current back to the head unit via an ADC for open-circuit and short-to-battery diagnostics. The 4.5-40 V input with 45 V load dump protection allows direct connection to the 12 V automotive battery without preregulation.
מומלץ
AM/FM Radio Head Unit Power Tree
In AM/FM head units and infotainment modules, the TPS7B7702QPWPRQ1 generates clean, regulated analog rails for tuner ICs and LNAs. The LDO's low dropout and high PSRR ensure phase-noise-sensitive RF stages receive a low-ripple supply that does not degrade receiver sensitivity. The integrated current-sense outputs let the head-unit MCU monitor LNA health and detect antenna faults in real time over the vehicle CAN network.
מומלץ
GNSS / Satellite Radio Antenna Module
GNSS (GPS/BeiDou/Galileo) and satellite-radio active antennas require bias-tees that inject DC power up the coax to a remote LNA. The TPS7B7702QPWPRQ1 supplies the DC side of two such bias-tees from a single IC, with current sensing enabling the receiver to detect open-coax or short-circuit conditions. AEC-Q100 Grade 1 qualification ensures reliable operation across the -40C to +125C automotive temperature range.
מומלץ
DAB / DAB+ Digital Broadcast Antenna
Digital Audio Broadcasting (DAB/DAB+) antennas in modern vehicles often contain two LNAs (Band III and L-band) requiring separate regulated rails. The TPS7B7702QPWPRQ1 provides both rails from one IC, simplifying PCB layout and reducing component count versus two discrete single-channel LDOs. Per-channel current monitoring allows independent fault detection for each LNA path.
מומלץ
Infotainment Telematics Control Unit (TCU)
Telematics control units integrate eCall, remote diagnostic, and V2X communications and require clean, fault-monitored power rails for cellular and GNSS LNAs. The TPS7B7702QPWPRQ1 powers both RF chains while its integrated current sense enables the TCU MCU to report antenna health to the vehicle network. Wide 4.5-40 V input tolerates cranking transients and load dump events on the automotive battery bus.
מומלץ
Vehicle-to-Everything (V2X) Antenna Module
Dedicated short-range communication (DSRC) and C-V2X antennas for V2X use a 5.9 GHz LNA requiring a tightly regulated low-noise supply. The TPS7B7702QPWPRQ1's channel A can supply the V2X LNA while channel B powers a GNSS LNA, both with diagnostic current sensing for fault reporting back to the V2X host processor. AEC-Q100 Grade 1 qualification is mandatory for V2X modules operating in safety-critical automotive contexts.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור TPS7B7702QPWPRQ1 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | TPS7B7701QPWPRQ1 | TPS7B7702QPWPRQ1.A |
|---|---|---|---|
| Package | 16-HTSSOP (PowerPAD) | 16-HTSSOP (PowerPAD) - same family | 16-HTSSOP (PowerPAD) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Channels | 2 (dual) | 1 (single) | 2 (dual) |
| Output Current per Channel | 300 mA | 300 mA | 300 mA |
| Input Voltage Range | 4.5 V to 40 V (45 V load dump) | 4.5 V to 40 V (45 V load dump) | 4.5 V to 40 V (45 V load dump) |
| Output Voltage Range | 1.5 V to 20 V adjustable | 1.5 V to 20 V adjustable | 1.5 V to 20 V adjustable |
| Current Sense | Yes, one per channel | Yes, single channel | Yes, one per channel |
| AEC-Q100 Qualification | Yes (Grade 1, -40C to +125C) | Yes (Grade 1) | Yes (Grade 1) |
מבדילים עיקריים
- Dual integrated current sense outputs eliminate external sense resistors (לעומתTPS7B7701QPWPRQ1)
- 45 V load dump protection built in (לעומתGeneric 36-V LDO alternatives)
- Adjustable output spans 1.5-20 V per channel (לעומתFixed-output automotive LDOs)
הערות תכנון
The 16-pin HTSSOP PowerPAD must be soldered to a copper pour of at least approximately 1 square inch on the top layer (more on inner layers) to keep junction temperature within the -40C to +125C operating range under full 600 mA combined load. Estimated: at VIN = 14 V, VOUT = 5 V, and 600 mA combined load, the IC dissipates roughly 5.4 W; without a thermal pad connection, junction temperature would exceed 150C. With proper PowerPAD soldering, the junction rise stays within safe limits at 25C ambient.
Place input capacitors (typically 1 uF to 10 uF ceramic, X7R) within 2-3 mm of the IN pins, and each channel's output capacitor (typically 2.2 uF to 22 uF ceramic, X7R, ESR < 100 mOhm) within 2-3 mm of the OUT pin. Estimated: with 22 uF ceramic output capacitors, the loop is stable across the full load range. Route the SENSE traces as short, guarded differential pairs to minimize noise pickup that would otherwise corrupt the load-current measurement.
Keep the analog ground (AGND) and power ground (PGND) separated, joining them at a single point near the IC's PGND pin. Place the feedback resistor dividers close to the ADJ pins to minimize the high-impedance feedback trace length, which would otherwise act as an antenna picking up switching noise from the vehicle's 12 V bus.
Do not operate the TPS7B7702QPWPRQ1 below the 4.5 V minimum input - the LDO cannot regulate and the current sense becomes unreliable below this threshold. Do not exceed the 300 mA per-channel rating; sustained overcurrent will trigger the internal current limit and may cause the output to fold back or shut down. Always validate the reverse-battery protection behavior with a TVS clamp on the input if the antenna module is externally accessible.
מידע על תאימות
AEC-Q100 Grade 1 qualified per TI product page. Q1 suffix confirms automotive qualification. RoHS and REACH compliant per DigiKey/Mouser listings. Halogen-free per TI material declaration.
