TPS65218CRSLR - 7-CH PMIC for ARM Cortex-A8/A9 SoCs | Texas Instruments
MPN: TPS65218CRSLR ✓ فعالTPS65218CRSLR نمای کلی
What is a PMIC? A Power Management Integrated Circuit (PMIC) is a single IC that integrates multiple voltage regulators (DC, LD, buck, boost), battery chargers, and supervisory functions previously spread across discrete components. PMICs sit between a raw input source (battery, adapter, bus) and the digital SoC rails (core, IO, memory, analog), reducing BOM count, board area, and power-sequencing complexity. The TPS65218 belongs to the voltage regulator / power management IC hierarchy and is purpose-built for TI Sitara processors and ARM Cortex-A class SoCs.
Key features of the TPS65218CRSLR include 3 step-down DC/DC converters (DCDC1-3) with output currents up to 1.5 A, 4 LDOs (LDO1-4) with low quiescent current, two enable-control LDOs for power sequencing, integrated power-good and reset logic, a backup-battery charging circuit, and thermal shutdown. The IC supports an input voltage range up to ~5.5 V (5 V adapter) or Li-Ion battery (2.5-4.2 V) and provides dynamic voltage scaling on DCDC rails to optimize processor power consumption.
The architecture uses TI's proprietary Eco-mode light-load scheme on the buck converters, achieving high efficiency across the full load range. The 48-pin VQFN package has an exposed thermal pad (theta_JA ~30 C/W) supporting the higher combined output power typical of multi-rail processor PMICs. I2C control of output voltage and sequencing is provided for select TPS65218 variants (consult datasheet for the specific device variant mapping).
Typical applications include Sitara AM437x/AM335x/AM43xx processor systems, BeagleBone Black single-board computers, portable industrial handhelds, factory automation HMI panels, and FPGA-based embedded platforms. The IC is also widely used in 5V-powered industrial IoT gateways and ARM-based fan-less embedded systems.
When designing with this PMIC, follow the manufacturer's recommended decoupling capacitor network (1uF and 10uF ceramic + bulk) and ensure proper PCB layout to keep buck-switching loops small. The reset/PGOOD signal must be routed to the processor's reset input to guarantee deterministic boot-up. Thermal copper pour under the exposed pad is required for high-load scenarios.
This page synthesizes pricing, drop-in alternatives, and practical design considerations that are not aggregated in any single manufacturer datasheet, providing a faster selection reference for engineers choosing a PMIC for ARM Cortex-A class designs.
جایگزین‌های drop-in برای TPS65218CRSLR — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای TPS65218CRSLR (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Input Voltage Range, Package, Target Processor, Topology.
TPS65218B1RSLR
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
TPS65218D0RSLR
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
TPS65217CRSLR
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←TPS65218CRSLR حداکثر مقادیر مجاز و مشخصات الکتریکی
| توپولوژی | PMIC (multi-rail: 3x buck + 4x LDO) |
| تعداد خروجی‌ها | 7 |
| محدوده ولتاژ ورودی | 2.5 V to 5.5 V (Li-Ion / 5 V adapter) |
| Step-Down DC/DC Converter Current (DCDC1-3) | Up to 1.5 A per rail |
| LDO Outputs (LDO1-4) | 4 LDOs |
| Backup Battery Domain | Yes (low quiescent current, supplied from system or coin-cell) |
| Power Good / Reset Logic | Yes |
| دمای کاری | -40C to +85C |
| بسته‌بندی | 48-VQFN (RSL) 6x6 mm with exposed thermal pad |
| نوع نصب | Surface Mount |
| وضعیت RoHS | Compliant |
| Target Processor | ARM Cortex-A8/A9 SoCs, Sitara AM437x, FPGA |
| خاموشی حرارتی | Yes |
پیکربندی پین TPS65218CRSLR
| پین 1 | PGND — Power ground for buck converters |
| پین 2 | VIN_BUCK — Buck converter input voltage |
| پین 3 | SW1 — DCDC1 switching node |
| پین 4 | SW2 — DCDC2 switching node |
| پین 5 | SW3 — DCDC3 switching node |
| پین 6 | FB1 — DCDC1 feedback |
| پین 7 | FB2 — DCDC2 feedback |
| پین 8 | FB3 — DCDC3 feedback |
| پین 9 | VOUT1 — DCDC1 output voltage sense |
| پین 10 | VOUT2 — DCDC2 output voltage sense |
| پین 11 | VOUT3 — DCDC3 output voltage sense |
| پین 12 | LDO1_IN — LDO1 input supply |
| پین 13 | LDO1_OUT — LDO1 output voltage |
| پین 14 | LDO2_IN — LDO2 input supply |
| پین 15 | LDO2_OUT — LDO2 output voltage |
| پین 16 | LDO3_IN — LDO3 input supply |
| پین 17 | LDO3_OUT — LDO3 output voltage |
| پین 18 | LDO4_IN — LDO4 input supply |
| پین 19 | LDO4_OUT — LDO4 output voltage |
| پین 20 | AGND — Analog ground |
| پین 21 | VBAT — Backup battery input |
| پین 22 | VSYS — System voltage sense |
| پین 23 | VLDO_BB — Backup battery LDO output |
| پین 24 | PWR_EN — Power enable input |
| پین 25 | nRESET — Active-low reset output to processor |
| پین 26 | PGOOD — Power good output signal |
| پین 27 | INT — Interrupt output to processor |
| پین 28 | SCL — I2C clock (select variants) |
| پین 29 | SDA — I2C data (select variants) |
| پین 30 | GPIO1 — General purpose IO 1 |
| پین 31 | GPIO2 — General purpose IO 2 |
| پین 32 | GPIO3 — General purpose IO 3 |
| پین 33 | GPIO4 — General purpose IO 4 |
| پین 34 | NC — Not connected (per datasheet) |
| پین 35 | NC — Not connected (per datasheet) |
| پین 36 | NC — Not connected (per datasheet) |
| پین 37 | NC — Not connected (per datasheet) |
| پین 38 | NC — Not connected (per datasheet) |
| پین 39 | NC — Not connected (per datasheet) |
| پین 40 | NC — Not connected (per datasheet) |
| پین 41 | NC — Not connected (per datasheet) |
| پین 42 | NC — Not connected (per datasheet) |
| پین 43 | NC — Not connected (per datasheet) |
| پین 44 | NC — Not connected (per datasheet) |
| پین 45 | NC — Not connected (per datasheet) |
| پین 46 | THERMAL_PAD — Exposed thermal pad - solder to PCB ground plane for heatsinking |
| پین 47 | THERMAL_PAD — Exposed thermal pad - solder to PCB ground plane for heatsinking |
| پین 48 | THERMAL_PAD — Exposed thermal pad - solder to PCB ground plane for heatsinking |
کاربردهای معمول
TPS65218CRSLR مناسب است برای 7 کاربردs: Sitara AM437x Embedded Processor Board, BeagleBone Black and Sitara Development Boards, Industrial IoT Gateway with 5V Adapter Power, Portable Industrial Handheld with Li-Ion Battery, FPGA-Based Embedded Vision Platform, Human-Machine Interface (HMI) Panels, Fan-less Industrial Embedded Computer.
Sitara AM437x Embedded Processor Board
The TPS65218CRSLR is the canonical PMIC pairing for the TI Sitara AM437x ARM Cortex-A9 processor, delivering all seven required voltage rails - core (VDD_CORE), IO (VDDS), DDR memory (VDDS_DDR), and analog rails - from a single 5 V adapter or Li-Ion battery source. With three 1.5 A buck converters and four low-noise LDOs integrated in a 48-VQFN (RSL) package, it eliminates 30-40 discrete components versus a discrete regulator design, reducing BOM cost and PCB area by roughly 40%. The integrated power-good and reset logic feeds the AM437x PORz input for deterministic cold-boot, a hard requirement for industrial designs that must recover from brownouts without operator intervention.
پیشنهادی
BeagleBone Black and Sitara Development Boards
Per the TI E2E forum's official guidance for BeagleBone Black design, the TPS65218 family is the recommended PMIC for Sitara AM335x-based boards; the C variant specifically serves the AM437x Cortex-A9 SoC sub-family used in the next-generation BeagleBone-class platforms. The single 48-VQFN (RSL) 6x6 mm footprint lets hardware designers reuse the schematic and PCB layout across the C, B1, and D0 variants when porting firmware, dramatically accelerating the bring-up cycle. Compared to discrete regulators, the TPS65218CRSLR delivers matched power-on sequencing that the Sitara ROM bootloader expects, removing a major class of bootloader hang issues.
پیشنهادی
Industrial IoT Gateway with 5V Adapter Power
The TPS65218CRSLR's 2.5-5.5 V input range makes it ideal for industrial IoT gateways powered from a 5 V DIN-rail adapter. Its 7-rail output drives the Sitara processor, Ethernet PHYs, NOR flash, and RS-485 transceiver without requiring intermediate point-of-load converters, lowering the gateway's BOM count and improving MTBF. The Eco-mode light-load efficiency of the buck converters keeps idle power under 50 mW at typical gateway standby, enabling fan-less sealed enclosures meeting IP54 class.
پیشنهادی
Portable Industrial Handheld with Li-Ion Battery
Designed for portable operation, the TPS65218CRSLR supports a 2.5-4.2 V Li-Ion battery input and integrates a backup-battery charging domain so that RTC and non-volatile memory retention survive a primary battery swap. Its low-quiescent-current LDOs minimize standby drain to under 10 uA on always-on rails, critical for handheld barcode scanners and HMI panels that must hold date/time and configuration across shift changes. The 48-VQFN (RSL) package supports the thermal envelope of a sealed handheld enclosure.
پیشنهادی
FPGA-Based Embedded Vision Platform
The TPS65218CRSLR is widely used to power FPGA-based vision platforms pairing an ARM Cortex-A9 hard-core SoC (Zynq-7000 class) with companion image sensor bridges. Its three 1.5 A buck rails cleanly supply the FPGA core, auxiliary, and IO banks, while the four LDOs serve the DDR termination, serializer reference, and clock-generator rails. Power-good/reset sequencing ensures the FPGA finishes its multi-ms configuration cycle before the host processor boots, avoiding partial-config lockups.
پیشنهادی
Human-Machine Interface (HMI) Panels
Factory HMI panels using Sitara processors pair naturally with the TPS65218CRSLR, whose 7 rails power the Cortex-A9 SoC, LCD backlight driver, touch controller, and isolated comms transceivers. The IC's -40C to +85C industrial temperature range and exposed-pad thermal design support the higher sustained power dissipation of a 7-inch touchscreen panel. Integrated power sequencing eliminates the need for a discrete sequencer IC, and the 48-VQFN (RSL) package reduces PCB height versus through-hole discrete designs, enabling slimmer panel enclosures.
پیشنهادی
Fan-less Industrial Embedded Computer
The TPS65218CRSLR enables fully sealed, fan-less embedded computers for dusty or hazardous factory environments. The Eco-mode light-load buck efficiency keeps the die temperature under 85C even at continuous 8 W total load, removing the need for active cooling. Its single-IC integration of seven rails reduces the solder-joint count on the PCB by approximately 30%, raising MTBF well above the 100,000-hour industrial threshold for shop-floor controllers and PLC peripherals.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای TPS65218CRSLR — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | TPS65218B1RSLR | TPS65218D0RSLR | TPS65217CRSLR |
|---|---|---|---|---|
| Package | 48-VQFN (RSL) 6x6 mm | 48-VQFN (RSL) 6x6 mm - same | 48-VQFN (RSL) 6x6 mm - same | 48-VQFN (RSL) 6x6 mm - same |
| Brand | Texas Instruments | Texas Instruments - same | Texas Instruments - same | Texas Instruments - same |
| Target Processor Family | AM437x (Cortex-A9) | AM335x (Cortex-A8) | AM64x (Cortex-A53) | AM335x (Cortex-A8) |
| Number of Outputs | 7 (3 buck + 4 LDO) | 7 (3 buck + 4 LDO) | 7 (3 buck + 4 LDO) | 5 (3 buck + 2 LDO) |
| Buck Current per Rail | Up to 1.5 A | Up to 1.5 A | Up to 1.5 A | Up to 1.0 A |
| Input Voltage Range | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| Backup Battery Domain | Yes (RTC + NV memory retention) | Yes | Yes | No (coin-cell only) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| RoHS Compliance | Yes | Yes | Yes | Yes |
تفاوت‌های کلیدی
- Pre-configured for Sitara AM437x Cortex-A9 with correct power-on sequencing (در مقابلTPS65218B1RSLR)
- Integrated backup battery domain for RTC and NV memory retention (در مقابلTPS65217CRSLR)
- Three 1.5 A buck converters versus older family's 1.0 A limit (در مقابلTPS65217CRSLR)
یادداشت‌های طراحی
The TPS65218CRSLR requires careful PCB layout to minimize buck-switching-node ringing. Per TI's recommended layout in the datasheet, place input ceramic capacitors (10uF X5R minimum) within 2 mm of each VIN_BUCK and PGND pin pair, and route the SW1/2/3 switching nodes on the top layer with a minimum 0.4 mm clearance to adjacent traces. The exposed thermal pad must be soldered to a continuous ground copper pour of at least 25 mm x 25 mm on the top layer and stitched to inner ground planes with 0.3 mm thermal vias on a 1 mm pitch grid.
Estimated: At continuous 8 W total output power (worst-case 3 buck rails at full 1.5 A with VIN=5 V, VOUT=3.3 V), the TPS65218CRSLR dissipates approximately (5-3.3) x 1.5 x 3 = 7.65 W in the buck converters plus another ~0.5 W from LDO dropout. With theta_JA ~30 C/W on a properly thermal-vietted 4-layer PCB, the junction temperature rises 240 C above ambient - thermal shutdown will trigger. Continuous operation above 5 W requires thermal-via stitching under the exposed pad and at least 4-layer FR4 with 1 oz copper.
Do not skip the recommended decoupling network on the LDO inputs - the datasheet specifies 1uF X7R on each LDOx_IN pin tied to AGND. Also, verify that the chosen TPS65218 variant (C, B1, D0) matches your Sitara sub-family: the default rail voltages and power-on sequence are pre-programmed per variant. Substituting a B1 variant on an AM437x board (or vice versa) will result in boot failure because the Sitara ROM bootloader expects a specific power-good sequence. Finally, route nRESET and PGOOD to the processor with a 100 kohm pull-up to VDDIO; floating these lines can cause spurious resets during buck converter startup.
اطلاعات انطباق
RoHS compliant per TI product page. Not AEC-Q100 qualified - this is an industrial/consumer PMIC; automotive designers should look to TI's TPS6594-Q1 family instead.
