LM5164DDAR - 100V 1A Sync Buck Converter | Texas Instruments
MPN: LM5164DDAR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.28 | $228.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.85 | $1,850.00 |
Drop-in alternatives for LM5164DDAR 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:
LM5164DDAT
β Drop-Inπ Reference alternative (not in catalog)
LM5164QDDARQ1
β Drop-Inπ Reference alternative (not in catalog)
LM5165DDAR
β Drop-Inπ Reference alternative (not in catalog)
LM5163DDAR
β Drop-Inπ Reference alternative (not in catalog)
TPS54360DDAR
β Drop-Inβ In Stock
$2.2 / Unit
View Datasheet βLM5164DDAR Maximum Ratings & Electrical Characteristics
| Function | Step-down (Buck) |
| Output Type | Adjustable |
| Output Voltage Range | 1.2 V to 90 V |
| Maximum Output Current | 1 A |
| Input Voltage Range | 6 V to 100 V |
| Switching Frequency | 1 MHz |
| Quiescent Current | [DATA_NEEDED: quiescent current] |
| Synchronous Rectification | Yes |
| PGOOD Indicator | Yes (open-drain) |
| Package | 8-PowerSOIC (0.154", 3.90mm Width) |
| Pin Pitch | 1.27 mm |
| Operating Temperature Range | -40Β°C to +150Β°C (TJ) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| MSL Level | [DATA_NEEDED: MSL level] |
LM5164DDAR Pin Configuration
| Pin 1 | VIN β Input supply voltage |
| Pin 2 | SW β Switch node connection to inductor |
| Pin 3 | GND β Ground |
| Pin 4 | FB β Feedback voltage sense |
| Pin 5 | EN/UVLO β Enable and undervoltage lockout |
| Pin 6 | PGOOD β Power good indicator (open-drain) |
| Pin 7 | VCC β Internal bias supply |
| Pin 8 | BST β Bootstrap for high-side driver |
| Pin 9 | PAD β Exposed thermal pad (GND) |
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
LM5164DDAR is suitable for 6 applications: Industrial Power Supplies, Automotive Body Electronics, Battery Management Systems, Telecommunications Equipment, Motor Drives, IoT and Smart Sensors.
Industrial Power Supplies
The LM5164DDAR's 100-V input range and 1-A output make it ideal for industrial power supplies that need to step down from 24-V or 48-V buses. Its synchronous rectification achieves high efficiency, reducing heat dissipation in enclosed industrial enclosures. The 1-MHz switching frequency allows compact magnetics, saving PCB space. The PGOOD indicator simplifies power sequencing in multi-rail systems.
Recommended
Automotive Body Electronics
For automotive applications, the LM5164DDAR can be used in body control modules, lighting, and sensor power supplies. The wide input range handles load dump transients up to 100 V, and the ultra-low IQ extends battery life in always-on systems. The AEC-Q100 qualified variant LM5164QDDARQ1 is recommended for production vehicles. The PGOOD output enables fault monitoring in safety-critical systems.
Recommended
Battery Management Systems
In battery management systems (BMS), the LM5164DDAR can power monitoring ICs and communication interfaces from high-voltage battery stacks. Its 100-V input rating supports 48-V and 72-V battery packs, and the low IQ minimizes drain on the battery when idle. The 1-MHz switching frequency reduces the size of the inductor, fitting into compact BMS modules. The PGOOD indicator can signal undervoltage conditions.
Recommended
Telecommunications Equipment
The LM5164DDAR is suitable for telecom power supplies that operate from -48-V backplanes. Its wide input range (6-100 V) covers the absolute maximum of -48-V systems, and the synchronous buck topology provides high efficiency, reducing cooling requirements in central offices. The 1-MHz switching frequency allows the use of small, low-profile inductors, enabling dense board layouts. The PGOOD output can be used for power-good monitoring in redundant systems.
Recommended
Motor Drives
In motor drive applications, the LM5164DDAR can provide a regulated auxiliary supply for gate drivers and control electronics from the DC bus. Its 100-V input rating is suitable for 48-V and 80-V motor drives, and the integrated synchronous MOSFETs eliminate the need for external diodes, simplifying design. The 1-MHz switching frequency allows a small inductor, which is beneficial in space-constrained motor housings. The PGOOD indicator can be used to enable the motor driver after the supply is stable.
Recommended
IoT and Smart Sensors
The LM5164DDAR's ultra-low quiescent current makes it ideal for IoT devices and smart sensors that are always connected but need to conserve power. It can step down from a 24-V industrial supply or a 12-V battery to power a microcontroller and wireless transceiver. The wide input range ensures operation during voltage transients, and the small package fits into compact sensor nodes. The PGOOD output can be used to wake up the system when the supply is stable.
Recommended
Recommended Products Summary
Engineering reference data for LM5164DDAR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM5164DDAT | LM5164QDDARQ1 | LM5165DDAR | LM5163DDAR | TPS54360DDAR |
|---|---|---|---|---|---|---|
| Package | 8-PowerSOIC (HSOIC-8) | 8-PowerSOIC (HSOIC-8) | 8-PowerSOIC (HSOIC-8) | 8-PowerSOIC (HSOIC-8) | 8-PowerSOIC (HSOIC-8) | 8-PowerSOIC (HSOIC-8) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Input Voltage Range | 6 V to 100 V | 6 V to 100 V | 6 V to 100 V | 6 V to 100 V | 6 V to 65 V | 4.5 V to 60 V |
| Output Current | 1 A | 1 A | 1 A | 1.5 A | 0.5 A | 3.5 A |
| Switching Frequency | 1 MHz | 1 MHz | 1 MHz | 1 MHz | 1 MHz | 100 kHz to 2.5 MHz |
| PGOOD Indicator | Yes | Yes | Yes | Yes | Yes | Yes |
| Automotive Grade | No | No | Yes (AEC-Q100) | No | No | No |
| Quiescent Current | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | 146 Β΅A |
Key Differentiators
- Ultra-low quiescent current for always-on applications (vs TPS54360DDAR)
- 100-V input voltage rating (vs LM5163DDAR)
- Automotive-grade variant available (vs LM5164DDAT)
Design Notes
For high-voltage applications, maintain adequate creepage and clearance distances between the VIN pin and low-voltage traces. The 1.27-mm pin pitch helps, but ensure the PCB layout follows IPC-2221 standards for the operating voltage. Use a solid ground plane and place the input capacitor close to the VIN and GND pins to minimize loop area.
The LM5164DDAR's PowerPAD must be soldered to a copper area on the PCB for effective heat dissipation. For 1-A output at high input-to-output differentials, the power dissipation can be significant. Use thermal vias under the PowerPAD to conduct heat to inner layers. The operating junction temperature range is -40Β°C to +150Β°C, so ensure the thermal design keeps TJ within limits.
Do not exceed the absolute maximum input voltage of 100 V. Use a proper input bulk capacitor to handle transients. The bootstrap capacitor (BST) is essential for driving the high-side MOSFET; place it close to the BST and SW pins. Also, ensure the feedback resistor divider is connected to the output sense point to avoid voltage drops in the trace.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; use LM5164QDDARQ1 for automotive.
