TPS54360
Step-Down DC/DC ConverterThe TPS54360 is a step-down dc/dc converter from Texas Instruments. View the full TPS54360 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
Official TPS54360 datasheet (PDF) — the source this page was extracted from.
TPS54360 Key Specifications
| Parameter | Value |
|---|---|
| Shutdown Current | 2 μA |
| Quiescent Current | 146 μA |
| Package Dimensions | 4.89mm x 3.90mm |
| Switching Frequency | 100kHz to 2.5MHz |
| Output Voltage Range | 0.8V to 58.8V |
| Internal Reference Voltage | 0.8V |
| Supply Input Voltage Range | 4.5V to 60V |
| High Side Mosfet Resistance | 92mΩ |
| Operating Temperature Range | -40°C to 150°C |
| Maximum Continuous Output Current | 3.5A |
TPS54360 Overview
Part: TPS54360B (TPS54360BDDAR) — Texas Instruments
Type: Step-Down (Buck) DC/DC Converter with integrated high-side MOSFET
Description: 4.5–60 V input, 3.5 A current-mode step-down converter with 92 mΩ integrated high-side MOSFET, 100 kHz–2.5 MHz adjustable switching frequency, and 146 μA no-load quiescent current.
Operating Conditions:
- Supply voltage: 4.5–60 V (VIN min is VO + VDO)
- Operating junction temperature: -40 to 150 °C
- Output voltage: 0.8–58.8 V
- Output current: 0–3.5 A
Absolute Maximum Ratings:
- Max input voltage (VIN): 65 V
- Max BOOT voltage: 73 V
- Max SW voltage: 65 V
- Max junction temperature: 150 °C
- Storage temperature: -65 to 150 °C
Key Specs:
- Voltage reference: 0.8 V typ (0.792–0.808 V over TJ = -40 to 150 °C)
- High-side MOSFET on-resistance: 92 mΩ typ, 190 mΩ max (VIN = 12 V, BOOT-SW = 6 V)
- Current limit threshold: 4.5 A min, 5.5 A typ, 6.8 A max (all VIN and temperatures, open loop)
- Non-switching operating supply current: 146 μA typ, 175 μA max (FB = 0.9 V, TA = 25 °C)
- Shutdown supply current: 2.25 μA typ, 4.5 μA max (EN = 0 V, 25 °C)
- Internal UVLO: 4.3 V typ rising (4.1–4.48 V), 325 mV hysteresis
- Switching frequency: 500 kHz typ at RT = 200 kΩ (450–550 kHz); 100–2500 kHz in RT mode; 160–2300 kHz in CLK mode
- Minimum controllable on-time: 135 ns typ (VIN = 12 V, TA = 25 °C)
- Thermal shutdown: 176 °C typ, 12 °C hysteresis
- Soft-start time: 2.1 ms at fSW = 500 kHz
Features:
- Current mode control with Eco-mode pulse-skipping for light-load efficiency
- Integrated BOOT recharge FET for low dropout at light loads
- Synchronizes to an external clock (PLL on RT/CLK pin)
- Adjustable UVLO voltage and hysteresis via the EN pin
- Internal soft start
- Cycle-by-cycle current limit
- Thermal shutdown, overvoltage, and frequency foldback protection
- 1% internal voltage reference
Applications:
- 12-V, 24-V and 48-V industrial and communications power systems
Package:
- 8-pin HSOIC with PowerPAD (DDA), 4.89 mm × 3.90 mm
TPS54360 Features
- 1 · 4.5-V to 60-V (65-V Abs Max) Input Range
- 3.5-A Continuous Current, 4.5-A Minimum Peak Inductor Current Limit
- Current Mode Control DC/DC Converter
- 92-m Ω High-Side MOSFET
- High Efficiency at Light Loads with Pulse Skipping Eco-mode™
- Low Dropout at Light Loads with Integrated BOOT Recharge FET
- 146μ A Operating Quiescent Current
- 2μ A Shutdown Current
- 100-kHz to 2.5-MHz Fixed Switching Frequency
- Synchronizes to External Clock
- Adjustable UVLO Voltage and Hysteresis
- Internal Soft Start
- Accurate Cycle-by-Cycle Current Limit
- Thermal, Overvoltage, and Frequency Foldback Protection
- 0.8 V 1% Internal Voltage Reference
- 8-Pin HSOIC with PowerPAD™ Package
- -40°C to 150°C TJ Operating Range
- Create a Custom Design using the TPS54360B with the WEBENCH® Power Designer
TPS54360 Applications
12-V, 24-V and 48-V Industrial and Communications Power Systems
TPS54360 Pin Configuration
DDA Package
8-Pin HSOIC
Top View
Pin Functions
| PIN - NAME | PIN - NO. | I/O | DESCRIPTION |
|---|---|---|---|
| BOOT | 1 | O | A bootstrap capacitor is required between BOOT and SW. If the voltage on this capacitor is below the minimum required to operate the high-side MOSFET, the output is switched off until the capacitor is refreshed. |
| VIN | 2 | I | Input supply voltage with 4.5 V to 60 V operating range. |
| EN | 3 | I | Enable pin, with internal pullup current source. Pull below 1.2 V to disable. Float to enable. Adjust the input undervoltage lockout with two resistors. See the Enable and Adjusting Undervoltage Lockout section. |
| RT/CLK | 4 | I | Resistor Timing and External Clock. An internal amplifier holds this pin at a fixed voltage when using an external resistor to ground to set the switching frequency. If the pin is pulled above the PLL upper threshold, a mode change occurs and the pin becomes a synchronization input. The internal amplifier is disabled and the pin is a high impedance clock input to the internal PLL. If clocking edges stop, the internal amplifier is re- enabled and the operating mode returns to resistor frequency programming. |
| FB | 5 | I | Inverting input of the transconductance (gm) error amplifier. |
| COMP | 6 | O | Error amplifier output and input to the output switch current (PWM) comparator. Connect frequency compensation components to this pin. |
| GND | 7 | - | Ground |
| SW | 8 | I | The source of the internal high-side power MOSFET and switching node of the converter. |
| Thermal Pad | 9 | - | GND pin must be electrically connected to the exposed pad on the printed circuit board for proper operation. |
TPS54360 Electrical Characteristics
TJ = -40°C to +150°C, VIN = 4.5 to 60V (unless otherwise noted)
| PARAMETER | PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|---|
| SUPPLY VOLTAGE (VIN PINS) | SUPPLY VOLTAGE (VIN PINS) | SUPPLY VOLTAGE (VIN PINS) | SUPPLY VOLTAGE (VIN PINS) | SUPPLY VOLTAGE (VIN PINS) | SUPPLY VOLTAGE (VIN PINS) | SUPPLY VOLTAGE (VIN PINS) |
| Operating input voltage | 4.5 | 60 | V | |||
| Internal undervoltage lockout threshold Internal undervoltage lockout threshold hysteresis | Rising | 4.1 | 4.3 325 | 4.48 | V mV | |
| Shutdown supply current | EN = 0 V, 25°C, 4.5 V ≤ V IN ≤ 60 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 pinS) | ENABLE AND UVLO (EN pinS) | ENABLE AND UVLO (EN pinS) | ENABLE AND UVLO (EN pinS) | ENABLE AND UVLO (EN pinS) | ENABLE AND UVLO (EN pinS) | ENABLE AND UVLO (EN pinS) |
| 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 | VOLTAGE REFERENCE | VOLTAGE REFERENCE | VOLTAGE REFERENCE | VOLTAGE REFERENCE | VOLTAGE REFERENCE |
| Voltage reference | 0.792 | 0.8 | 0.808 | V | ||
| HIGH-SIDE MOSFET | HIGH-SIDE MOSFET | HIGH-SIDE MOSFET | HIGH-SIDE MOSFET | HIGH-SIDE MOSFET | HIGH-SIDE MOSFET | HIGH-SIDE MOSFET |
| On-resistance | V IN = 12 V, BOOT-SW = 6 V | 92 | 190 | m Ω | ||
| ERROR AMPLIFIER | ERROR AMPLIFIER Input current | ERROR AMPLIFIER | ERROR AMPLIFIER | ERROR AMPLIFIER 50 | ERROR AMPLIFIER | ERROR AMPLIFIER nA |
| Error amplifier transconductance (g M ) | -2 μ A < I COMP < 2 μ A, V COMP = 1 V | 350 | μ S | |||
| 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 S | ||
| Error amplifier DC gain Min unity gain bandwidth | V FB = 0.8 V | 10,000 2500 | V/V kHz | |||
| Error amplifier source/sink COMP to SW current transconductance | V (COMP) = 1 V, 100-mV overdrive | ±30 12 | μ A A/V | |||
| CURRENT LIMIT | CURRENT LIMIT | CURRENT LIMIT | CURRENT LIMIT | CURRENT LIMIT | CURRENT LIMIT | CURRENT LIMIT |
| All VIN and temperatures, Open Loop (1) | 4.5 | 5.5 | 6.8 | |||
| Current limit threshold | All temperatures, VIN = 12 V, Open Loop (1) | 4.5 | 5.5 | 6.25 | A | |
| V IN = 12 V, T A | = 25°C, Open Loop (1) | 5.2 | 5.5 | 5.85 | ||
| THERMAL SHUTDOWN | THERMAL SHUTDOWN Thermal shutdown Thermal shutdown hysteresis | THERMAL SHUTDOWN | THERMAL SHUTDOWN | THERMAL SHUTDOWN 176 12 | THERMAL SHUTDOWN | THERMAL SHUTDOWN °C °C |
| TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK pinS) | TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK pinS) | TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK pinS) | TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK pinS) | TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK pinS) | TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK pinS) | TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK pinS) |
| 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 |
TPS54360 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Input voltage | VIN | -0.3 | 65 | V |
| Input voltage | EN | -0.3 | 8.4 | V |
| Input voltage | BOOT | 73 | V | |
| Input voltage | FB | -0.3 | 3 | V |
| Input voltage | COMP | -0.3 | 3 | V |
| Input voltage | RT/CLK | -0.3 | 3.6 | V |
| BOOT-SW | 8 | V | ||
| SW | -0.6 | 65 | V | |
| SW, 10-ns transient | -2 | 65 | V | |
| Operating junction temperature | Operating junction temperature | -40 | 150 | °C |
| Storage temperature, T stg | Storage temperature, T stg | -65 | 150 | °C |
TPS54360 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 | 60 | V |
| V O | Output voltage | 0.8 | 58.8 | V |
| I O | Output current | 0 | 3.5 | A |
| T J | Junction temperature | -40 | 150 | °C |
TPS54360 Thermal Information
| THERMAL METRIC (1) | THERMAL METRIC (1) | TPS54360B DDA (HSOIC) 8 PINS | UNIT |
|---|---|---|---|
| R θ JA | Junction-to-ambient thermal resistance | 42 | °C/W |
| R θ JC(top) | Junction-to-case (top) thermal resistance | 45.8 | °C/W |
| R θ JB | Junction-to-board thermal resistance | 23.4 | °C/W |
| ψ JT | Junction-to-top characterization parameter | 5.9 | °C/W |
| ψ JB | Junction-to-board characterization parameter | 23.4 | °C/W |
| R θ JC(bot) | Junction-to-case (bottom) thermal resistance | 3.6 | °C/W |
TPS54360 Typical Application
The TPS54360B is a 60-V, 3.5-A, step-down regulator with an integrated high-side MOSFET. Ideal applications are: 12 V, 24 and 48 V industrial 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 |
|---|---|---|
| TPS54360B | Texas Instruments | HSOIC-8 |
| TPS54360BDDA | Texas Instruments | HSOIC-8 |
| TPS54360BDDAR | Texas Instruments | 8-PowerSOIC (0.154", 3.90mm Width) |
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- 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 (2,417)
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