LP87702 - Dual Buck + 5V Boost PMIC | Texas Instruments
MPN: LP87702 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
Drop-in alternatives for LP87702 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
LP87702-Q1
β Drop-Inπ Reference alternative (not in catalog)
LP87702DRHBRQ1
β Drop-Inπ Reference alternative (not in catalog)
LP87702KRHBTQ1
β Drop-Inπ Reference alternative (not in catalog)
LP87702KRHBT
β Drop-Inπ Reference alternative (not in catalog)
TPS6521855
β Drop-Inβ In Stock
Contact for price
View Datasheet βLP87702 Maximum Ratings & Electrical Characteristics
| Number of Buck Converters | 2 |
| Buck Output Current (each) | 3 A |
| Boost Output Voltage | 5 V |
| Boost Output Current | 600 mA |
| Input Voltage Range | 2.8 V to 5.5 V |
| Switching Frequency | 2.2 MHz |
| Package | 32-VQFN (5x5 mm) |
| Operating Temperature Range | [DATA_NEEDED: operating temperature range] |
| Interface | I2C |
| Diagnostic Functions | Voltage monitoring, current limiting, thermal shutdown |
| Watchdog | Window watchdog |
| Remote Voltage Sensing | Yes |
| Programmable Sequencing | Yes |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
LP87702 Pin Configuration
| Pin 1 | VIN β Input supply voltage |
| Pin 2 | SW_BUCK0 β Switch node for buck converter 0 |
| Pin 3 | PGND β Power ground |
| Pin 4 | SW_BUCK1 β Switch node for buck converter 1 |
| Pin 5 | VOUT_BOOST β Boost converter output |
| Pin 6 | EN β Enable input |
| Pin 7 | SCL β I2C clock |
| Pin 8 | SDA β I2C data |
| Pin 9 | VMON1 β Voltage monitor input 1 |
| Pin 10 | VMON2 β Voltage monitor input 2 |
| Pin 11 | WD β Watchdog input |
| Pin 12 | GND β Ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
LP87702 is suitable for 6 applications: Automotive Radar, Industrial Radar, ADAS (Advanced Driver Assistance Systems), Safety-Critical Embedded Systems, Portable Instrumentation, FPGA Power Supply.
Automotive Radar
The LP87702 provides multiple power rails for automotive radar processors and sensors. Its dual buck converters deliver up to 3A each for the processor core and I/O, while the 5V boost powers peripheral circuits. The integrated diagnostics and watchdog ensure reliable operation in safety-critical radar systems, meeting ASIL requirements. The 2.2MHz switching frequency allows compact inductor selection, saving PCB space in radar modules.
Recommended
Industrial Radar
For industrial radar systems, the LP87702 offers a compact power solution with high efficiency and diagnostic capabilities. The dual bucks can power a DSP or FPGA, while the boost provides 5V for sensors and communication interfaces. The device's wide input range (2.8V to 5.5V) accommodates various supply sources. Its small VQFN package and integrated features reduce BOM count and board space, ideal for space-constrained industrial sensors.
Recommended
ADAS (Advanced Driver Assistance Systems)
In ADAS applications, the LP87702 ensures reliable power delivery to cameras, radar, and processing units. Its programmable sequencing and enable control allow proper power-up order for multiple rails. The window watchdog monitors system health, and voltage monitoring inputs can supervise external supplies. The automotive-grade LP87702-Q1 variant is AEC-Q100 qualified, making it suitable for harsh automotive environments.
Recommended
Safety-Critical Embedded Systems
The LP87702 is designed for safety-critical systems requiring high reliability and fault detection. Its integrated diagnostics, including voltage monitoring and thermal shutdown, help achieve functional safety goals. The window watchdog can reset the host if software hangs. The device supports I2C for real-time monitoring and control, enabling dynamic voltage scaling. This makes it suitable for medical, industrial, and automotive safety applications.
Recommended
Portable Instrumentation
For portable instrumentation, the LP87702 offers high efficiency and a small footprint. The dual bucks can power an MCU and analog front-end, while the boost provides 5V for sensors or displays. The wide input range supports battery operation. The device's low quiescent current in PFM mode extends battery life. Its integrated features reduce external components, making it ideal for handheld devices.
Recommended
FPGA Power Supply
The LP87702 can power FPGAs that require multiple voltage rails. Its two buck converters can supply core and I/O voltages, while the boost provides auxiliary 5V. The programmable sequencing ensures correct power-up order, and remote sensing improves accuracy for high-current rails. The 2.2MHz switching frequency allows small inductors, saving board space. This makes it suitable for FPGA-based radar and industrial control systems.
Recommended
Recommended Products Summary
Engineering reference data for LP87702 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LP87702-Q1 | LP87702DRHBRQ1 | LP87702KRHBTQ1 | TPS6521855 |
|---|---|---|---|---|---|
| Package | 32-VQFN (5x5 mm) | 32-VQFN (5x5 mm) | 32-VQFN (5x5 mm) | 32-VQFN (5x5 mm) | 32-VQFN (5x5 mm) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Bucks | 2 | 2 | 2 | 2 | 2 |
| Buck Output Current (each) | 3 A | 3 A | 3 A | 3 A | [DATA_NEEDED] |
| Boost Output Voltage | 5 V | 5 V | 5 V | 5 V | [DATA_NEEDED] |
| Boost Output Current | 600 mA | 600 mA | 600 mA | 600 mA | [DATA_NEEDED] |
| Switching Frequency | 2.2 MHz | 2.2 MHz | 2.2 MHz | 2.2 MHz | [DATA_NEEDED] |
| Automotive Grade | No | Yes (AEC-Q100) | Yes (AEC-Q100) | Yes (AEC-Q100) | [DATA_NEEDED] |
Key Differentiators
- Integrated dual buck and boost with diagnostics (vs TPS6521855)
- Automotive-grade variant available (vs LP87702KRHBT)
- High switching frequency for compact design (vs TPS6521855)
Design Notes
For optimal performance, place the LP87702 close to the load and use a solid ground plane. Decouple each power input with a 10uF ceramic capacitor placed as close as possible to the VIN pin. For the buck converters, use low-ESR ceramic capacitors (22uF) on the outputs. The boost output requires a 10uF capacitor. Ensure the thermal pad is soldered to a large copper area for heat dissipation.
Route the remote sensing traces from the buck outputs to the point-of-load to achieve accurate voltage regulation. Keep these traces away from switching nodes to avoid noise coupling. The I2C lines (SCL, SDA) should have pull-up resistors and be routed with controlled impedance if long. Place the watchdog and enable traces with proper filtering to prevent false triggering.
Do not exceed the absolute maximum input voltage of 5.5V. Ensure the boost output is not loaded beyond 600mA to avoid thermal issues. Configure the watchdog and voltage monitors according to system safety requirements; incorrect settings may cause spurious resets. Use the I2C interface to read diagnostic registers during development to verify proper operation.
Compliance Information
RoHS compliance inferred from TI's standard compliance. AEC-Q100 qualification applies to the Q1 variant only.
