TPS54540DDA
Synchronous Buck ConverterThe TPS54540DDA is a synchronous buck converter from Texas Instruments. View the full TPS54540DDA datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
TPS54540DDA shares its datasheet with TPS54540QDDAQ1, whose page lists every part number it covers.
Official TPS54540DDA datasheet (PDF) — the source this page was extracted from.
Manufacturer
Texas InstrumentsCategory
Switching Regulators (Buck)TPS54540DDA Key Specifications
| Parameter | Value |
|---|---|
| Packaging | Tube |
| Standard Pack Qty | 75 |
| Output Current | 5A |
| Switching Frequency | 100kHz ~ 2.5MHz |
| Function | Step-Down |
| Grade | Automotive |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature | -40°C ~ 150°C (TJ) |
| Output Configuration | Positive |
| Output Type | Adjustable |
| Package / Case | 8-PowerSOIC (0.154", 3.90mm Width) |
| Qualification | AEC-Q100 |
| Supplier Device Package | 8-SO PowerPad |
| Synchronous Rectifier | No |
| Topology | Buck, Split Rail |
| Input Voltage (Max) | 42V |
| Input Voltage (Min) | 4.5V |
| Output Voltage (Max) | 41.1V |
| Output Voltage | 0.8V |
TPS54540DDA Overview
Part: TPS54540QDDAQ1 — Texas Instruments
Type: Step-Down (Buck) DC-DC Converter with Integrated High-Side MOSFET
Description: 4.5–42 V input, 5 A step-down converter with a 92 mΩ integrated high-side MOSFET, 100 kHz to 2.5 MHz switching frequency, and 146 μA operating quiescent current.
Operating Conditions:
- Supply voltage: VO + VDO to 42 V
- Operating temperature: -40 to 150 °C (junction)
- Output voltage: 0.8 to 41.1 V
- Output current: 0 to 5 A
Absolute Maximum Ratings:
- Max supply voltage (VIN): 45 V
- Max junction temperature: 150 °C
- Storage temperature: -65 to 150 °C
- BOOT: 53 V max; SW: 45 V max (-0.6 V min)
Key Specs:
- Output current: up to 5 A
- High-side MOSFET on-resistance: 92 mΩ
- Operating quiescent current: 146 μA (no load, pulse-skip mode)
- Shutdown supply current: 2 μA (EN low)
- Switching frequency: 100 kHz to 2.5 MHz, synchronizable to an external clock
- Internal voltage reference: 0.8 V, 1%
- Internal UVLO: 4.3 V, adjustable via the EN pin
- Survives load dump pulses up to 45 V per ISO 7637
Features:
- Pulse-skipping Eco-mode™ for high efficiency at light loads
- Integrated BOOT recharge FET for low dropout at light loads
- Adjustable UVLO voltage and hysteresis
- Current-mode control with external compensation
- Controlled internal output voltage start-up ramp
- Cycle-by-cycle current limit, frequency foldback, and thermal shutdown
- WEBENCH® Power Designer support
Applications:
- Industrial automation and motor control
- Vehicle accessories: GPS, entertainment
- USB dedicated charging ports and battery chargers
- 12 V and 24 V industrial, automotive, and communications power systems
Package:
- HSOP-8 with PowerPAD™ (4.89 mm x 3.9 mm body)
TPS54540DDA Features
- 1 · High Efficiency at Light Loads with Pulse Skipping Eco-mode™
- 92-m Ω High-Side MOSFET
- 146 μ A Operating Quiescent Current and 2 μ A Shutdown Current
- 100 kHz to 2.5 MHz Fixed Switching Frequency
- Synchronizes to External Clock
- Low Dropout at Light Loads with Integrated BOOT Recharge FET
- Adjustable UVLO Voltage and Hysteresis
- 0.8 V 1% Internal Voltage Reference
- 8-Terminal HSOP with PowerPAD™ Package
- -40°C to 150°C TJ Operating Range
- Create a Custom Design using the TPS54540 with the WEBENCH® Power Designer
TPS54540DDA Applications
- Industrial Automation and Motor Control
- Vehicle Accessories: GPS, Entertainment
- USB Dedicated Charging Ports and Battery Chargers
- 12 V and 24 V Industrial, Automotive and Communications Power Systems
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TPS54540DDA Pin Configuration
TPS54540DDA Electrical Characteristics
TJ = -40°C to 150°C, VIN = 4.5 to 42 V (unless otherwise noted)
| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|
| SUPPLY VOLTAGE (VIN TERMINAL) | |||||
| Operating input voltage | 4.5 | 42 | V | ||
| Internal undervoltage lockout threshold | Rising | 4.1 | 4.3 | 4.48 | V |
| Internal undervoltage lockout threshold hysteresis | 325 | mV | |||
| Shutdown supply current | EN = 0 V, 25°C, 4.5 V ≤ VIN ≤ 42 V | 2.25 | 4.5 | ||
| Operating: nonswitching supply current | FB = 0.9 V, T A = 25°C | 146 | 175 | μ A | |
| ENABLE AND UVLO (EN TERMINAL) | |||||
| Enable threshold voltage | No voltage hysteresis, rising and falling Enable threshold +50 mV | 1.1 | 1.2 -4.6 | 1.3 | V |
| Input current | Enable threshold -50 mV | -0.58 | -1.2 | -1.8 | μ A |
| Hysteresis current | -2.2 | -3.4 | -4.5 | μ A | |
| VOLTAGE REFERENCE | |||||
| Voltage reference | 0.792 | 0.8 | 0.808 | V | |
| HIGH-SIDE MOSFET | |||||
| On-resistance | VIN = 12 V, BOOT-SW = 6 V | 92 | 190 | m Ω | |
| ERROR AMPLIFIER | |||||
| Input current | 50 | nA | |||
| Error amplifier transconductance (g M ) | -2 μ A < I COMP < 2 μ A, V COMP = 1 V | 350 | μ Mhos | ||
| Error amplifier transconductance (g M ) during soft-start | -2 μ A < I COMP < 2 μ A, V COMP = 1 V, V FB = 0.4 V | 77 | μ Mhos | ||
| Error amplifier dc gain | V FB = 0.8 V | 10,000 | V/V | ||
| Min unity gain bandwidth | 2500 | kHz | |||
| Error amplifier source/sink | V (COMP) = 1 V, 100 mV overdrive | ±30 | μ A | ||
| COMP to SW current transconductance | 17 | A/V | |||
| CURRENT LIMIT | |||||
| Current limit threshold | All VIN and temperatures, Open Loop (1) | 6.3 | 7.5 | 8.8 | |
| All temperatures, VIN = 12 V, Open Loop (1) | 6.3 | 7.5 | 8.3 | A | |
| VIN = 12 V, T A = 25°C, Open Loop (1) | 7.1 | 7.5 | 7.9 | ||
| THERMAL SHUTDOWN | |||||
| Thermal shutdown | 176 | °C | |||
| Thermal shutdown hysteresis | 12 | °C | |||
| TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK | TERMINAL) | ||||
| Switching frequency range using RT mode | 100 | 2500 | kHz | ||
| f SW Switching frequency | R T = 200 k Ω | 450 | 500 | 550 | kHz |
| Switching frequency range using CLK mode | 160 | 2300 | kHz | ||
| RT/CLK high threshold | 1.55 | 2 | V | ||
| RT/CLK low threshold | 0.5 | 1.2 | V |
TPS54540DDA Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)
| VALUE - MIN | VALUE - MAX | UNIT | ||
|---|---|---|---|---|
| Input | VIN | -0.3 | 45 | V |
| Input | EN | -0.3 | 8.4 | V |
| Input | BOOT | 53 | V | |
| Input | FB | -0.3 | 3 | V |
| Input | COMP | -0.3 | 3 | V |
| Input | RT/CLK | -0.3 | 3.6 | V |
| Output | BOOT-SW | 8 | V | |
| Output | SW | -0.6 | 45 | V |
| Output | SW, 10-ns Transient | -2 | 45 | V |
| Operating junction temperature, T J | Operating junction temperature, T J | -40 | 150 | °C |
| Storage temperature, T STG | Storage temperature, T STG | -65 | 150 | °C |
TPS54540DDA Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| V IN | Supply input voltage (1) | V O + V DO | 42 | V |
| V O | Output voltage | 0.8 | 41.1 | V |
| I O | Output current | 0 | 5 | A |
| T J | Junction Temperature | -40 | 150 | °C |
TPS54540DDA Thermal Information
| THERMAL METRIC (1)(2) | TPS54540 DDA (8 PINS) | UNIT | |
|---|---|---|---|
| θ JA | Junction-to-ambient thermal resistance (standard board) | 42.0 | °C/W |
| ψ JT | Junction-to-top characterization parameter | 5.9 | °C/W |
| ψ JB | Junction-to-board characterization parameter | 23.4 | °C/W |
| θ JCtop | Junction-to-case(top) thermal resistance | 45.8 | °C/W |
| θ JCbot | Junction-to-case(bottom) thermal resistance | 3.6 | °C/W |
| θ JB | Junction-to-board thermal resistance | 23.4 | v |
TPS54540DDA Typical Application
The TPS54540 is a 42 V, 5 A, step down regulator with an integrated high side MOSFET. Idea applications are: 12 V and 24 V Industrial, Automotive and Communications Power Systems.
Variants on the same datasheet
These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.
| Part Number | Manufacturer | Package |
|---|---|---|
| TPS54540 | Texas Instruments | HSOP-8 |
| TPS54540-Q1 | Texas Instruments | HSOP-8 |
| TPS54540DDA.B | Texas Instruments | — |
| TPS54540DDAR | Texas Instruments | HSOP-8 |
| TPS54540DDAR.B | Texas Instruments | — |
| TPS54540QDDAQ1 | Texas Instruments | 8-PowerSOIC (0.154", 3.90mm Width) |
Other Switching Regulators (Buck)
- TPS54302 – Texas Instruments, Synchronous Step-Down Converter
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- TLV62568 – Texas Instruments, Synchronous Buck Converter
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- TPS562200 – Texas Instruments, Synchronous Buck Converter
- AP63203WU – Diodes Incorporated, Synchronous Buck Converter
- TPS54202 – Texas Instruments, Synchronous Buck Converter
- AP63357DV-7 – Diodes Incorporated, Synchronous Buck Converter
All Switching Regulators (Buck) datasheetsAll Texas Instruments datasheets (2,418)
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