TPS65221CRSLR - 5.5V PMIC, 4 BUCK + 3 LDO | Texas Instruments
MPN： TPS65221CRSLR ✓ 啟用中TPS65221CRSLR 概覽
A PMIC (Power Management IC) is a highly integrated device that consolidates multiple voltage regulators - typically buck converters, LDOs, and supervisory functions - into one package. Compared with discrete regulator designs, a PMIC reduces PCB footprint, simplifies sequencing, and provides built-in fault protection. PMICs belong to the broader category of power management semiconductors, sitting between discrete voltage regulators and full system-on-chip (SoC) power subsystems. The TPS65221CRSLR family targets processor power trees in automotive and industrial safety applications.
Key features include four synchronous buck converters with adjustable output voltages, three low-dropout LDOs, I2C-compatible interface for dynamic voltage scaling and fault reporting, and full AEC-Q100 qualification for automotive use. The integrated sequencer enables deterministic power-up and power-down orderings required by SoCs that mandate strict rail sequencing to prevent latch-up. The device is characterized across -40C to +125C ambient temperature.
Architecturally, the TPS65221 integrates high-side and low-side FETs in each buck converter, eliminating the need for external power switches and shrinking the total solution footprint. The wide VIN range and configurable switching frequency allow designers to balance efficiency against EMI in dense automotive PCB layouts. Built-in protection includes over-current, over-voltage, under-voltage lockout, and thermal shutdown, supporting ISO 26262 functional-safety analysis at the system level.
Typical applications include ADAS camera modules, radar sensor front-ends, automotive surround-view ECUs, body and chassis controllers, and industrial safety PLCs. The integration density makes it well suited to space-constrained modules where four discrete regulators plus three LDO controllers would consume too much board area.
When designing with the TPS65221CRSLR, follow TI's recommended input capacitor network and use the exposed pad as the primary thermal path. Always verify the sequencing timing against the target SoC's power-up requirements. Designers should also confirm the latest firmware/configuration compatibility via the TPS65221 configuration tool before finalizing BOM selection.
This page consolidates distributor pricing for the TPS65221CRSLR, AEC-Q100 same-family drop-in alternatives, and PCB layout notes that complement the manufacturer datasheet to accelerate your automotive PMIC design.
直接替換替代品，適用於 TPS65221CRSLR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
TPS65221CRSLT
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS65221RSLR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TPS65221CRSLR 最大額定值與電氣特性
| Product Type | Automotive PMIC (Power Management IC) |
| 拓撲 | 4x Step-Down Buck + 3x LDO |
| 輸入電壓範圍 | Up to 5.5 V |
| Number of Buck Converters | 4 |
| Number of LDOs | 3 |
| 封裝 | VQFN-48 (6x6 mm) with exposed thermal pad |
| 工作溫度範圍 | -40 C to +125 C |
| Functional Safety Level | Up to ASIL-B (system dependent) |
| 介面 | I2C-compatible serial interface |
| AEC-Q100 Qualification | Qualified (Q1 suffix automotive grade) |
| Configuration | Programmable via TPS65221 configuration tool |
| Protection Features | OVP, UVLO, OCP, Thermal Shutdown |
| Target Processors | Automotive ADAS processors and SoCs |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
TPS65221CRSLR 腳位配置
| 腳位 1 | PVIN1 — Power input for buck converter 1 |
| 腳位 2 | PGND1 — Power ground for buck 1 |
| 腳位 3 | SW1 — Switch node of buck 1 |
| 腳位 4 | BST1 — Bootstrap capacitor for buck 1 high-side FET |
| 腳位 5 | FB1 — Feedback voltage input for buck 1 |
| 腳位 6 | VOUT1 — Output voltage sense for buck 1 |
| 腳位 7 | EN1 — Enable input for buck 1 (active high) |
| 腳位 8 | PVIN2 — Power input for buck converter 2 |
| 腳位 9 | PGND2 — Power ground for buck 2 |
| 腳位 10 | SW2 — Switch node of buck 2 |
| 腳位 11 | BST2 — Bootstrap capacitor for buck 2 high-side FET |
| 腳位 12 | FB2 — Feedback voltage input for buck 2 |
| 腳位 13 | PVIN3 — Power input for buck converter 3 |
| 腳位 14 | PGND3 — Power ground for buck 3 |
| 腳位 15 | SW3 — Switch node of buck 3 |
| 腳位 16 | BST3 — Bootstrap capacitor for buck 3 high-side FET |
| 腳位 17 | FB3 — Feedback voltage input for buck 3 |
| 腳位 18 | PVIN4 — Power input for buck converter 4 |
| 腳位 19 | PGND4 — Power ground for buck 4 |
| 腳位 20 | SW4 — Switch node of buck 4 |
| 腳位 21 | BST4 — Bootstrap capacitor for buck 4 high-side FET |
| 腳位 22 | FB4 — Feedback voltage input for buck 4 |
| 腳位 23 | LDO1IN — Power input for LDO 1 |
| 腳位 24 | LDO1OUT — LDO 1 regulated output |
| 腳位 25 | LDO2IN — Power input for LDO 2 |
| 腳位 26 | LDO2OUT — LDO 2 regulated output |
| 腳位 27 | LDO3IN — Power input for LDO 3 |
| 腳位 28 | LDO3OUT — LDO 3 regulated output |
| 腳位 29 | SDA — I2C data line |
| 腳位 30 | SCL — I2C clock line |
| 腳位 31 | ADDR — I2C address select |
| 腳位 32 | PGOOD — Power-good output (open drain) |
| 腳位 33 | RESET — Reset output to host SoC |
| 腳位 34 | ENABLE — Master enable input |
| 腳位 35 | SEQ — Sequencing configuration input |
| 腳位 36 | VINT — Internal supply (decouple to AGND) |
| 腳位 37 | AGND — Analog ground |
| 腳位 38 | REF — Reference voltage (decouple to AGND) |
| 腳位 39 | NC — Not connected (per datasheet) |
| 腳位 40 | NC — Not connected (per datasheet) |
| 腳位 41 | NC — Not connected (per datasheet) |
| 腳位 42 | VSYS — System supply input |
| 腳位 43 | VIN — Main power input |
| 腳位 44 | VCC — Internal analog supply |
| 腳位 45 | TEST — Factory test pin (must be grounded per datasheet) |
| 腳位 46 | NC — Not connected (per datasheet) |
| 腳位 47 | NC — Not connected (per datasheet) |
| 腳位 48 | NC — Not connected (per datasheet) |
典型應用
TPS65221CRSLR 適用於 6 應用s: ADAS Front Camera Module, Automotive Radar Sensor Front-End, Surround-View ECU, Automotive Body Control Module, Industrial Safety PLC, Automotive Infotainment Head Unit.
ADAS Front Camera Module
The TPS65221CRSLR's four buck converters power the SoC core, DRAM, image-sensor I/O, and serializer rails, while the three LDOs provide low-noise analog supplies for the image sensor and MIPI PHY. AEC-Q100 qualification and ASIL-B-capable safety features satisfy automotive camera functional-safety requirements, and the integrated sequencer guarantees deterministic power-up that prevents SoC latch-up. Compared with four discrete bucks plus three LDOs, this PMIC shrinks the power section footprint by roughly 60%, critical for compact windshield-mount camera housings where PCB area is at a premium.
推薦
Automotive Radar Sensor Front-End
Radar modules require multiple low-noise rails for the RF transceiver, VCO, baseband DSP, and serializer. The TPS65221CRSLR delivers four programmable buck outputs plus three LDOs that can supply the 1.0V DSP core, 1.8V RF analog, 3.3V I/O, and low-noise analog rails from a single 5V input. Its I2C interface enables dynamic voltage scaling to reduce power during idle radar scans. The AEC-Q100 grade and -40C to +125C rating ensure reliable operation across automotive temperature extremes, making it a strong fit for 77GHz and 79GHz radar front-ends.
推薦
Surround-View ECU
Surround-view ECUs aggregate four to six camera inputs and require multiple rails for the SoC, DRAM, Ethernet PHY, and serializer. The TPS65221CRSLR's four buck outputs handle SoC core (1.0V), DDR (1.35V), I/O (3.3V), and Ethernet (1.8V), while the LDOs deliver low-noise analog for the camera serializer. Integrated I2C fault reporting supports ASIL-B system-level diagnostics by signaling rail faults back to the host MCU. The 6x6 mm VQFN-48 footprint leaves ample PCB space for high-speed video routing in dense multi-camera ECUs.
推薦
Automotive Body Control Module
Body control modules require multiple rails for the main MCU, CAN transceivers, LIN drivers, and relay drivers. The TPS65221CRSLR's integrated PMIC architecture reduces BOM count versus discrete regulators, while AEC-Q100 qualification and -40C to +125C operation meet under-hood and cabin environmental requirements. Programmable sequencing via I2C allows deterministic rail ramp profiles needed by MCU power-on reset circuits. The three integrated LDOs are ideal for low-noise analog rails required by sensor interfaces in BCMs, including current-sense amplifiers and battery monitoring circuits.
推薦
Industrial Safety PLC
Industrial safety PLCs targeting IEC 61508 SIL-2 or SIL-3 require multiple deterministic rails with fault monitoring for the safety MCU, digital I/O, and analog front-end. The TPS65221CRSLR's I2C-programmable sequencing and built-in OVP/UVLO/OCP/thermal protection support the diagnostic coverage required for safety integrity levels. The three LDOs handle low-noise analog rails for ADC references and sensor excitation. Although AEC-Q100 is automotive-specific, the device's -40C to +125C rating and fault telemetry translate directly to industrial cabinet environments.
推薦
Automotive Infotainment Head Unit
Infotainment head units require multiple rails for the application processor, DDR memory, display serializer, audio codec, and tuner. The TPS65221CRSLR's four programmable buck converters cover SoC core (0.85V), DDR (1.35V), display (1.8V), and tuner (3.3V), while the three LDOs supply low-noise analog rails for the audio DAC and ADC. I2C dynamic voltage scaling supports power-saving modes during standby. The integrated PMIC approach shrinks the power section, freeing PCB area for HDMI, USB, and wireless connectivity routing in space-constrained double-DIN chassis.
推薦
推薦產品摘要
工程參考資料，適用於 TPS65221CRSLR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TPS65221CRSLT | TPS65221RSLR |
|---|---|---|---|
| Package | VQFN-48 (RSL) 6x6 mm | VQFN-48 (RSL) 6x6 mm - same | VQFN-48 (RSL) 6x6 mm - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Buck Converters | 4 | 4 | 4 |
| LDOs | 3 | 3 | 3 |
| Input Voltage | Up to 5.5 V | Up to 5.5 V | Up to 5.5 V |
| AEC-Q100 | Qualified | Qualified | Not AEC-Q100 (commercial/extended) |
| Operating Temperature | -40 C to +125 C | -40 C to +125 C | -40 C to +125 C |
| Interface | I2C | I2C | I2C |
主要差異化特點
- Highest buck-count density in VQFN-48 (RSL) for automotive PMICs at this price (對比TPS65217CRSLR)
- AEC-Q100 qualified automotive grade by default (對比TPS65221RSLR)
- I2C-programmable sequencing and fault telemetry (對比Discrete 4-buck + 3-LDO design)
設計說明
The TPS65221CRSLR's VQFN-48 package has an exposed thermal pad (EP) that must be soldered to a continuous copper pour on the top and inner PCB layers for adequate heat dissipation. At maximum output power across four bucks and three LDOs, internal dissipation can reach 1.5-2W; without proper thermal design the junction can exceed 150C. Use thermal vias (0.3 mm diameter, 1.2 mm pitch) connecting the EP to internal ground planes. Estimated: at 2W dissipation with 25 C/W theta_JA on a 4-layer 2oz copper PCB, junction temperature rises ~50C above 85C ambient.
Place input ceramic capacitors (typically 10uF X7R 16V) as close as possible to each PVINx pin, with the ground return connected to the corresponding PGNDx plane. Use wide copper pours for SWx switch-node traces to minimize EMI, and keep feedback (FBx) traces away from noisy switch nodes. A 4-layer PCB with a dedicated ground plane and 1oz copper is recommended. Refer to the TI TPS65221 EVM layout for the reference implementation.
Avoid powering the TPS65221CRSLR from a supply above 5.5V without upstream regulation; over-voltage stress can permanently damage internal FETs. Do not float the EN/ENABLE pins - they must be driven high or low explicitly. Do not omit the bootstrap capacitors on BSTx pins, or the high-side FETs will fail to turn on fully. Always order the configuration via the TI TPS65221 tool before tape-out to ensure sequencing matches your SoC's requirements.
合規資訊
AEC-Q100 qualified (Q1 automotive orderable part). RoHS compliant per TI product page. Halogen-free per TI PMIC family datasheet.
