TPS546B24ARVFT
Synchronous Buck ConverterThe TPS546B24ARVFT is a synchronous buck converter from Texas Instruments. View the full TPS546B24ARVFT datasheet below including electrical characteristics, absolute maximum ratings.
Manufacturer
Texas Instruments
Category
Synchronous Buck Converter
Overview
Part: TPS546B24A — Texas Instruments
Type: Synchronous Buck Converter
Description: The TPS546B24A is a highly integrated, non-isolated DC/DC converter capable of 2.95-V to 18-V input, 20-A current output, and up to 4x stackable operation for up to 80 A, featuring PMBus control and telemetry.
Operating Conditions:
- Supply voltage: 2.95–18 V (AVIN, PVIN)
- Operating temperature: -40 to 150 °C (Junction)
- Output voltage range: 0.25–5.5 V (PMBus), 0.5–5.5 V (pin strap)
- Switching frequency: 225 kHz to 1.5 MHz
Absolute Maximum Ratings:
- Max supply voltage (PVIN): 18 V (19 V < 2-ms transient)
- Max junction temperature: 150 °C
- Max storage temperature: 150 °C
Key Specs:
- Input supply voltage range (AVIN, PVIN): 2.95–16 V
- Input operating current (I AVIN): 12.5 mA (typ, converter not switching)
- Output voltage accuracy (V OUT(ACC)): ±0.8% (typ, 0°C ≤ T J ≤ 125°C, V OUT = 500 mV to 1500 mV)
- Integrated MOSFETs: 5.5 mΩ / 1.8 mΩ
- Switching frequency (f SW): 550 kHz (typ, adjustable 225 kHz to 1500 kHz)
- VDD5 Regulator output voltage: 4.7 V (typ, I VDD5 = 10 mA)
- Remote sense input impedance (Z RSA): 130 kΩ (typ)
- PLL lock time (t PLL): 65 μs (typ, Fsw = 550 kHz, SYNC clock frequency 495-605 kHz)
Features:
- Split rail support: 2.95-V to 18-V PVIN; 2.95-V to 18-V AVIN
- Integrated 5.5-mΩ/1.8-mΩ MOSFETs
- Average current mode control with selectable internal compensation
- 2×, 3×, 4× stackable with current sharing up to 80 A
- Selectable 0.5-V to 5.5-V output via pin strap or 0.25-V to 5.5-V using PMBus VOUT_COMMAND
- Extensive PMBus command set with telemetry for VOUT, I OUT and internal die temperature
- Differential remote sensing with internal FB divider for < 1% VOUT error -40°C to +150°C TJ
- 12 Selectable switching frequencies from 225 kHz to 1.5 MHz (8 pin-strap options)
- Frequency sync in/sync out
- Supports prebiased output
Applications:
- Data center switches, rack servers
- Active antenna system, remote radio and baseband unit
- Automated test equipment, CT, PET, and MRI
- ASIC, SoC, FPGA, DSP core, and I/O voltage
Package:
- LQFN-CLIP (40) - 7.00 mm × 5.00 mm
Features
- Split rail support: 2.95-V to 18-V PVIN; 2.95-V to 18-V AVIN (4-VIN VDD5 for switching)
- Integrated 5.5-mΩ/1.8-mΩ MOSFETs
- Average current mode control with selectable internal compensation
- 2×, 3×, 4× stackable with current sharing up to 80 A, supporting a single address per output
- Selectable 0.5-V to 5.5-V output via pin strap or 0.25-V to 5.5-V using PMBus VOUT_COMMAND
- Extensive PMBus command set with telemetry for VOUT, I OUT and internal die temperature
- Differential remote sensing with internal FB divider for < 1% VOUT error -40°C to +150°C TJ
- AVS and margining capabilities through PMBus
- MSEL pins pin programming PMBus defaults
- 12 Selectable switching frequencies from 225 kHz to 1.5 MHz (8 pin-strap options)
- Frequency sync in/sync out
- Supports prebiased output
- Supports strongly coupled inductor
- 7-mm × 5-mm × 1.5-mm, 40-pin QFN, pitch = 0.5 mm
- Create a Custom Design Using the TPS546B24A With WEBENCH ® Power Designer
Applications
- Data center switches, rack servers
- Active antenna system, remote radio and baseband unit
- Automated test equipment, CT, PET, and MRI
- ASIC, SoC, FPGA, DSP core, and I/O voltage
Pin Configuration
Figure 5-1. 40-Pin LQFN-CLIP With Exposed Thermal Pad RVF Package (Top View)
Electrical Characteristics
TJ = -40°C to 150°C, VPVIN = VAVIN= 12 V, fSW = 550 kHz; zero power dissipation (unless otherwise noted)
| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
|---|---|---|---|---|---|---|
| INPUT SUPPLY | INPUT SUPPLY | INPUT SUPPLY | INPUT SUPPLY | INPUT SUPPLY | INPUT SUPPLY | INPUT SUPPLY |
| V AVIN | Input supply voltage range | 2.95 | 16 | V | ||
| V PVIN | Power stage voltage range | 2.95 | 16 | |||
| I AVIN | Input operating current | Converter not switching | 12.5 | 17 | mA | |
| AVIN UVLO | AVIN UVLO | AVIN UVLO | AVIN UVLO | AVIN UVLO | AVIN UVLO | AVIN UVLO |
| V AVINuvlo | Analog input voltage UVLO for power on reset (PMBus communication) | enable threshold | 2.5 | 2.7 | V | |
| Analog input voltage UVLO for disable Analog input voltage UVLO hysteresis | 2.09 | 2.3 250 | V mV | |||
| t delay(uvlo_PMBus) | Delay from AVIN UVLO to PMBus ready to communicate | AVIN = 3 V | 10 | ms | ||
| PVIN UVLO | PVIN UVLO | PVIN UVLO | PVIN UVLO | PVIN UVLO | PVIN UVLO | PVIN UVLO |
| VIN_ON | Power input turn on voltage | Factory default setting | 2.75 | V | ||
| VIN_ON | Power input turn on voltage | Programmable range | 2.75 | 15.75 | V | |
| VIN_ON | Power input turn on voltage | Resolution | 0.25 | V | ||
| VIN_ON | Accuracy | -5% | 5% | |||
| VIN_OFF | Power input turnoff voltage | Factory default setting | 2.5 | V | ||
| VIN_OFF | Power input turnoff voltage | Programmable range | 2.5 | 15.5 | V | |
| VIN_OFF | Resolution Accuracy | -5% | 0.25 | 5% | V | |
| ENABLE AND UVLO | ENABLE AND UVLO | ENABLE AND UVLO | ENABLE AND UVLO | ENABLE AND UVLO | ENABLE AND UVLO | ENABLE AND UVLO |
| V ENuvlo | EN/UVLO Voltage rising threshold | 1.05 | 1.1 | V | ||
| V ENuvlo | EN/UVLO Voltage falling threshold | 0.9 | ||||
| V ENhys | EN/UVLO Voltage hysteresis | No external resistors on EN/UVLO | 70 | mV | ||
| EN/UVLO hysteresis current | V EN/UVLO = 1.1 V | 4.5 | 5.5 | 6.5 | μA | |
| I ENhys | EN/UVLO hysteresis current | V EN/UVLO = 0.9 V | -100 | -5 | nA | |
| REMOTE SENSE AMPLIFIER | REMOTE SENSE AMPLIFIER | REMOTE SENSE AMPLIFIER | REMOTE SENSE AMPLIFIER | REMOTE SENSE AMPLIFIER | REMOTE SENSE AMPLIFIER | REMOTE SENSE AMPLIFIER |
| Z RSA | Remote sense input impedance | VOSNS - GOSNS = 1V VOSNS to GOSNS | 85 | 130 | 165 | kΏ |
| V IRNG(GOSNS) | GOSNS input range for regulation accuracy (1) | VOSNS - GOSNS = 1V, VOUT_SCALE_LOOP 0.5 | -0.05 | 0.05 | V |
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Input voltage | PVIN | -0.3 | 18 | V |
| Input voltage | PVIN, < 2-ms transient | -0.3 | 19 | V |
| Input voltage | PVIN - SW (PVIN to SW differential) | -0.3 | 24 | V |
| Input voltage | PVIN - SW (PVIN to SW differential, < 10-ns transient because of SW ringing) | -5 | 24 | V |
| Input voltage | AVIN | -0.3 | 20 | V |
| Input voltage | BOOT | -0.3 | 35 | V |
| Input voltage | BOOT - SW (BOOT to SW differential) | -0.3 | 5.5 | V |
| Input voltage | EN/UVLO, VOSNS, SYNC, VSEL, MSEL1, MSEL2, ADRSEL | -0.3 | 5.5 | V |
| Input voltage | VSHARE, GOSNS/SLAVE | -0.3 | 1.98 | V |
| Input voltage | PMB_CLK, PMB_DATA, BCX_CLK, BCX_DAT | -0.3 | 5.5 | V |
| Output voltage | SW | -1 | 24 | V |
| Output voltage | SW < 10-ns transient | -5 | 24 | V |
| Output voltage | VDD5, SMB_ALRT, PGD/RST_B | -0.3 | 5.5 | V |
| Output voltage | BP1V5 | -0.3 | 1.65 | V |
| T J operating junction temperature | T J operating junction temperature | -40 | 150 | °C |
| T stg Storage temperature | T stg Storage temperature | -55 | 150 | °C |
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | NOM | MAX | UNIT | ||
|---|---|---|---|---|---|
| V AVIN | Controller input voltage | 2.95 | 12 | 18 | V |
| V PVIN | Power stage input voltage | 2.95 | 12 | 18 | V |
| V SW(peak) | Peak Switch Node Voltage with respect to PGND | 18 | V | ||
| T J | Junction temperature | -40 | 150 | °C |
Thermal Information
| THERMAL METRIC (1) | THERMAL METRIC (1) | TPS546X24A PQFN (RVF) 40 PINS | UNIT |
|---|---|---|---|
| R θJA | Junction-to-ambient thermal resistance JEDEC | 25.3 | °C/W |
| R θJA | Junction-to-ambient thermal resistance EVM (2) | 12 | °C/W |
| R θJC(top) | Junction-to-case (top) thermal resistance | 26.3 | °C/W |
| R θJB | Junction-to-board thermal resistance | 8.5 | °C/W |
| THERMAL METRIC (1) | THERMAL METRIC (1) | TPS546X24A PQFN (RVF) 40 PINS | UNIT |
| ψ JT | Junction-to-top characterization parameter | 2 | °C/W |
| ψ JB | Junction-to-board characterization parameter | 9.3 | °C/W |
| R θJC(bot) | Junction-to-case (bottom) thermal resistance | 1 | °C/W |
Typical Application
The TPS546B24A is a highly integrated, synchronous step-down DC/DC converter. This device is used to convert a higher DC-input voltage to a lower DC-output voltage, with a maximum output current of for a single device. Use the following design procedures to select key component values for single phase. The appropriate behavioral options can be set through PMBus.
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| TPS546B24A | Texas Instruments | — |
| TPS546B24ARVFR | Texas Instruments | — |
| TPS546B24ARVFR.A | Texas Instruments | — |
| TPS546B24ATPS546X24X | Texas Instruments | — |
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