TPS6521855 - 7-Output PMIC for AM64x | Texas Instruments
MPN: TPS6521855 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.48 | $64.80 |
| 100 | $5.62 | $562.00 |
| 500 | $5.04 | $2,520.00 |
| 1,000 | $4.68 | $4,680.00 |
TPS6521855 Overview
A Power Management IC (PMIC) is a highly integrated device that consolidates multiple power conversion functions - DC-DC converters, LDO regulators, power sequencing, voltage monitoring, and protection - into one package. In processor-based systems, the PMIC sits between the power source and the SoC's multiple voltage domains, translating a battery or adapter input into the core, memory, I/O, and auxiliary rails. Within the system hierarchy, a PMIC belongs to the power management IC family, and its role is to provide reliable, sequence-correct power delivery at every boot and operating state.
Key features include seven integrated output channels, factory pre-programmed default register settings matched to the AM64x power-up sequence, and an input voltage range of 2.2V to 5.5V with output voltages configurable from 0.85V to 3.4V at up to 1.8A per the distributor-listed output current. The factory configuration reduces firmware bring-up effort because the device starts with AM64x-compatible settings without external programming.
From an architecture perspective, the TPS6521855 is closely related to the TPS6521815 in the TPS65218 family. According to a TI E2E power-management forum discussion, TPS6521815 and TPS6521855 are pin-to-pin compatible devices sharing the same programming steps; the TPS6521855 ships pre-programmed for AM64x, while the TPS6521815 is configured via register programming for custom sequencing.
Typical applications include industrial PLCs and factory automation controllers, portable battery-powered instruments, IoT edge gateways, robotics and motion-control boards, and test-and-measurement instrumentation. In each case, the AM64x multi-rail power requirements are met by a single 48-VQFN PMIC, reducing BOM count and board area.
When designing, verify the input source configuration (Li-Ion vs 5V adapter) and place adequate input and output capacitance close to the package. If sequencing different from factory defaults is required, select the TPS6521815 and program the register map accordingly.
Drop-in alternatives for TPS6521855 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TPS6521815RSLT
✅ Drop-In📋 Reference alternative (not in catalog)
TPS6521815RSLR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS6521855RSLR
✅ Drop-In📋 Reference alternative (not in catalog)
TPS65951A1ZGU
⚡ Same Package ⚠️ Specs Unverified✓ In Stock
$4.48 / Unit
View Datasheet →TPS6521855 Maximum Ratings & Electrical Characteristics
| Function | Power Management IC (PMIC) for AM64x processors |
| Number of Outputs | 7 |
| Input Voltage Range | 2.2 V to 5.5 V |
| Output Voltage Range | 0.85 V to 3.4 V |
| Maximum Output Current | 1.8 A |
| Input Source Topology | Li-Ion battery or 5-V adapter |
| Operating Temperature | -40C to +105C |
| Package | VQFN-48 (6x6 mm) |
| Mounting Style | SMD/SMT |
| Packaging | Cut Tape, Reel |
| Series | TPS6521855 |
| Type | Multi-Channel PMIC |
| Processor Support | AM64x Arm Cortex-A53 |
| Configuration | Factory pre-programmed for AM64x power sequence |
| Pin Compatibility | Pin-to-pin compatible with TPS6521815 |
TPS6521855 vqfn-48 (6x6 mm) Pin Configuration Guide
Pin configuration for TPS6521855 (vqfn-48 (6x6 mm) package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for TPS6521855.
Refer to the datasheet for full pin configuration.
Typical Applications
TPS6521855 is suitable for 6 applications: Industrial PLC and Factory Automation, Portable Battery-Powered Instruments, IoT Edge Gateways, Robotics and Motion Control Boards, Test and Measurement Instrumentation, Human-Machine Interface (HMI) Panels.
Industrial PLC and Factory Automation
The TPS6521855 fits PLC main controller boards built on the AM64x Cortex-A53 SoC because its seven rails cover the core, memory, and I/O voltage domains from a single 48-VQFN device. Its -40C to +105C industrial characterization and factory pre-programmed AM64x sequencing remove firmware bring-up risk on the factory floor. Placed between a 5V adapter rail and the AM64x with local bulk and ceramic decoupling, it eliminates three to four discrete converter ICs, cutting board area and BOM lines while guaranteeing sequence-correct boot on every power cycle.
Recommended
Portable Battery-Powered Instruments
For handheld and portable instruments using an AM64x processor, the TPS6521855 accepts a single-cell Li-Ion input within its 2.2V to 5.5V range and generates all processor rails at up to 1.8A. The integrated design avoids the quiescent-current and board-area penalties of a multi-chip discrete power tree, which matters in battery-powered enclosures. Because the power-up sequence is factory-set, the instrument boots identically on every battery insertion, and the 48-VQFN 6x6 mm footprint keeps the power section compact on two-layer or four-layer portable PCBs.
Recommended
IoT Edge Gateways
AM64x-based industrial IoT edge gateways need multiple regulated rails for the processor, DDR memory, Ethernet PHYs, and peripherals; the TPS6521855 consolidates this into one PMIC. Its 0.85V to 3.4V output span covers modern low-voltage core and I/O rails, and the pre-programmed sequence ensures the processor never sees an unpowered or out-of-order rail during PoE-splitter or adapter brown-out events. Using a single integrated PMIC instead of discrete bucks reduces EMI complexity in the metal enclosure and frees PCB area for connectivity circuitry and connectors.
Recommended
Robotics and Motion Control Boards
Robotics controllers pair the AM64x with motor drivers and encoders, requiring a processor power tree isolated from noisy motor rails. The TPS6521855 provides sequence-correct AM64x rails from a 5V adapter or battery bus, while its integrated monitoring flags power faults during stall-induced supply sags. Designers should separate the motor-driver supply plane from the PMIC input and add bulk capacitance, so back-EMF transients do not disturb the 2.2V-to-5.5V input window. The -40C to +105C range covers industrial robot cells and outdoor mobile platforms.
Recommended
Test and Measurement Instrumentation
Bench and modular instruments built around the AM64x use the TPS6521855 to power the processor section reliably across line-power conditions. The seven-output integration simplifies the power tree documentation and verification required for measurement products, and the -40C to +105C characterization supports calibration-lab temperature ranges. Because the PMIC is factory pre-programmed, engineering teams avoid power-sequencing firmware work and can focus validation effort on the measurement front end. The 48-VQFN footprint also allows reuse of a qualified reference power design across instrument product families.
Recommended
Human-Machine Interface (HMI) Panels
Industrial HMI touch panels driven by the AM64x benefit from the TPS6521855 single-chip power solution: it powers the processor, DDR, and I/O rails from a 5V or battery input while its industrial temperature rating survives enclosed panel environments. The pre-programmed AM64x sequence prevents display-controller glitches during rapid power cycling common in factory shifts. Integrating seven rails in one 6x6 mm VQFN reduces the power-section area on dense HMI boards where display connectors, touch circuitry, and isolation components compete for space, simplifying layout and EMI containment.
Recommended
Recommended Products Summary
Engineering reference data for TPS6521855 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TPS6521815RSLT | TPS6521815RSLR | TPS65951A1ZGU |
|---|---|---|---|---|
| Package | VQFN-48 (6x6 mm) | VQFN-48 (6x6 mm) - same | VQFN-48 (6x6 mm) - same | VQFN-48 - same package family |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Packaging Option | Reel / Cut Tape | Reel / Cut Tape | Tape & Reel | Reel |
Key Differentiators
- Factory pre-programmed AM64x power sequence (vs TPS6521815RSLT)
- Seven integrated rails in one 6x6 mm VQFN (vs Discrete multi-buck solution)
- Dual input topology support (vs TPS65951A1ZGU)
Design Notes
Verify the input source topology before layout: the TPS6521855 supports both Li-Ion battery and 5V adapter inputs within its 2.2V to 5.5V range. For battery designs, ensure the minimum battery voltage under load stays within the input window, accounting for cable and connector drops. For adapter designs, add input bulk capacitance to ride through adapter hot-plug transients so the PMIC never falls out of regulation during the AM64x boot sequence.
Place the input and output capacitors for each of the seven rails as close as possible to the VQFN-48 pins, following the PCB layout section of the TI datasheet. Use a solid ground plane under the package and connect the thermal pad to ground with a sufficient via array for heat spreading. Keep the high-current core rail inductor loops minimal to limit EMI near the processor's sensitive memory routing.
The TPS6521855 is factory pre-programmed for the AM64x default power sequence. If your design needs different rail voltages or ordering, do not attempt to re-configure the pre-programmed variant; instead select the pin-compatible TPS6521815 and program its registers over I2C. Migrating between the two later requires no PCB change since they are pin-to-pin compatible per the TI E2E forum.
Compliance Information
Compliance details not present in provided web data; consult TI product page for RoHS/REACH status.
