TPS54540QDDAQ1
Synchronous Buck ConverterThe TPS54540QDDAQ1 is a synchronous buck converter from Texas Instruments. View the full TPS54540QDDAQ1 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
Manufacturer
Texas Instruments
Category
Synchronous Buck Converter
Package
8-PowerSOIC (0.154", 3.90mm Width)
Lifecycle
Not For New Designs
Key Specifications
| Parameter | Value |
|---|---|
| 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) |
| Packaging | Tube |
| Qualification | AEC-Q100 |
| Standard Pack Qty | 75 |
| 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 |
Overview
Part: TPS54540 — Texas Instruments
Type: Step Down DC-DC Converter
Description: The TPS54540 is a 4.5-V to 42-V input, 5 A, step down regulator with an integrated high side MOSFET, featuring current mode control, low ripple pulse skip mode, and a wide switching frequency range.
Operating Conditions:
- Supply voltage: 4.5–42 V
- Operating temperature: -40 to 150 °C
Absolute Maximum Ratings:
- Max supply voltage: 45 V (VIN)
- Max continuous current: 5 A
- Max junction/storage temperature: 150 °C
Key Specs:
- High-Side MOSFET resistance: 92 mΩ
- Operating Quiescent Current: 146 μA
- Shutdown Current: 2 μA
- Fixed Switching Frequency: 100 kHz to 2.5 MHz
- Internal Voltage Reference: 0.8 V 1%
- Output Current: 5 A
Features:
- High Efficiency at Light Loads with Pulse Skipping Eco-mode™
- 92-mΩ High-Side MOSFET
- 146 μA Operating Quiescent Current and 2 μA 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
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) (4.89mm x 3.9mm)
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
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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Pin Configuration
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 |
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)
| VALUE | VALUE | UNIT | ||
|---|---|---|---|---|
| MIN | MAX | |||
| 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 |
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 |
Thermal Information
| THERMAL METRIC (1)(2) | TPS54540 DDA (8 PINS) | UNIT | |
|---|---|---|---|
| θ JA | Junction-to-ambient thermal resistance (standard board) | 42 | °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 |
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.
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| TPS54540 | Texas Instruments | — |
| TPS54540-Q1 | Texas Instruments | — |
| TPS54540DDA | Texas Instruments | |
| TPS54540DDA.B | Texas Instruments | — |
| TPS54540DDAR | Texas Instruments | — |
| TPS54540DDAR.B | Texas Instruments | — |
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