TPS54424
Synchronous Step-Down DC/DC ConverterThe TPS54424 is a synchronous step-down dc/dc converter from Texas Instruments. View the full TPS54424 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
Manufacturer
Texas Instruments
Category
Synchronous Step-Down DC/DC Converter
Key Specifications
| Parameter | Value |
|---|---|
| Output Current | 4A |
| Switching Frequency | 200kHz ~ 1.6MHz |
| Function | Step-Down |
| Height | 1 mm |
| Length | 3.5 mm |
| Lifecycle Status | Production (Last Updated: 4 days ago) |
| Manufacturer Lifecycle Status | ACTIVE (Last Updated: 4 days ago) |
| Max Operating Temperature | 125 °C |
| Min Operating Temperature | -40 °C |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Number of Pins | 18 |
| Operating Temperature | -40°C ~ 150°C (TJ) |
| Output Configuration | Positive |
| Output Current | 4 A |
| Output Type | Adjustable |
| Output Voltage | 12 V |
| Package / Case | 18-PowerVFQFN |
| Packaging | MouseReel |
| Packaging | Cut Tape |
| RoHS | Compliant |
| Schedule B | 8542390000, 8542390000|8542390000|8542390000|8542390000|8542390000 |
| Standard Pack Qty | 250 |
| Supplier Device Package | 18-VQFN-HR (3.5x3.5) |
| Synchronous Rectifier | Yes |
| Thickness | 3.5 mm |
| Topology | Buck |
| Topology | Buck |
| Input Voltage (Max) | 17V |
| Input Voltage (Min) | 4.5V |
| Output Voltage (Max) | 12V |
| Output Voltage | 0.6V |
| Width | 900 µm |
Overview
Part: TPS54424 — Texas Instruments
Type: Synchronous Step-Down DC/DC Converter
Description: A 4.5–17 V input, 4 A synchronous step-down DC/DC converter with integrated 14.1 mΩ and 6.1 mΩ MOSFETs, peak current mode control, and a 0.6–12 V output voltage range.
Operating Conditions:
- Supply voltage: 4.5–17 V
- Operating temperature: -40 to 150 °C
- Output voltage: 0.6–12 V
- Output current: 4 A
- Switching frequency: 200–1600 kHz
Absolute Maximum Ratings:
- Max supply voltage: 19 V
- Max junction/storage temperature: 150 °C
Key Specs:
- Regulated FB voltage: 595–605 mV (TJ = -40°C to 150°C)
- Operating non-switching supply current: 580 μA (typ)
- Shutdown supply current: 3 μA (typ)
- High-side switch resistance: 14.1 mΩ (typ, TA = 25°C, VIN = 12 V)
- Low-side switch resistance: 6.1 mΩ (typ, TA = 25°C, VIN = 12 V)
- High-side peak current limit: 5.6–8.5 A (VIN = 12 V)
- Thermal protection trip point: 170 °C (typ)
- Minimum on time: 90 ns (typ)
- Switching frequency (RT mode): 200 kHz (min) to 1.6 MHz (max)
Features:
- Small 3.5-mm x 3.5-mm HotRod™ QFN Package
- Integrated 14.1-m Ω and 6.1-m Ω MOSFETs
- Peak Current Mode Control with Fast Transient Response
- 200-kHz to 1.6-MHz Fixed Switching Frequency
- Synchronizes to External Clock
- 0.6-V Voltage Reference ±0.85% Over Temperature
- 0.6-V to 12-V Output Voltage Range
- Hiccup Current Limit
- Safe Startup into Pre-Biased Output Voltage
- Adjustable Soft-start and Power Sequencing
- Adjustable Input Under Voltage Lockout
- 3-μA Shutdown Current
- Power Good Output Monitor for Undervoltage and Overvoltage
- Output Overvoltage Protection
- Non-latch Thermal Shutdown Protection
- -40°C to 150°C Operating Junction Temperature
Applications:
- Telecom and Wireless Infrastructure
- Test and Measurement
- Medical Imaging Equipment
- Enterprise Switching
- Server
Package:
- RNV (18) VQFN-HR (3.50 mm x 3.50 mm)
Features
- 1 · Small 3.5-mm x 3.5-mm HotRod™ QFN Package
- Integrated 14.1-m Ω and 6.1-m Ω MOSFETs
- Peak Current Mode Control with Fast Transient Response
- 200-kHz to 1.6-MHz Fixed Switching Frequency
- Synchronizes to External Clock
- 0.6-V Voltage Reference ±0.85% Over Temperature
- 0.6-V to 12-V Output Voltage Range
- Hiccup Current Limit
- Safe Startup into Pre-Biased Output Voltage
- Adjustable Soft-start and Power Sequencing
- Adjustable Input Under Voltage Lockout
- 3-μA Shutdown Current
- Power Good Output Monitor for Undervoltage and Overvoltage
- Output Overvoltage Protection
- Non-latch Thermal Shutdown Protection
- -40°C to 150°C Operating Junction Temperature
- Create a Custom Design Using the TPS54424 With the WEBENCH ® Power Designer
Applications
- Telecom and Wireless Infrastructure
- Test and Measurement
- Medical Imaging Equipment
- Enterprise Switching
- Server
Pin Configuration
| PIN | PIN | I/O | DESCRIPTION |
|---|---|---|---|
| NAME | NO. | I/O | DESCRIPTION |
| BOOT | 1 | I | Floating supply voltage for high-side MOSFET gate drive circuit. Connect a 0.1-μF ceramic capacitor between BOOT and SW pins. |
| VIN | 2, 11 | I | Input voltage supply pin. Power for the internal circuit and the connection to drain of high- side MOSFET. Connect both pins to the input power source with a low impedance connection. Connect both pins and their neighboring PGND pins. |
| PGND | 3, 4, 5, 8, 9, 10 | - | Ground return for low-side power MOSFET and its drivers. |
| SW | 6, 7 | O | Switching node. Connected to the source of the high-side MOSFET and drain of the low-side MOSFET. |
| AGND | 12 | - | Ground of internal analog circuitry. AGND must be connected to the PGND plane. |
| RT/CLK | 13 | I | Switching frequency setting pin. In RT mode, an external timing resistor adjusts the switching frequency. In CLK mode, the device synchronizes to an external clock input to this pin. |
| FB | 14 | I | Converter feedback input. Connect to the output voltage with a resistor divider. |
| COMP | 15 | I | Error amplifier output and input to the PWM modulator. Connect loop compensation to this pin. |
| SS/TRK | 16 | I | Soft-start and tracking pin. Connecting an external capacitor sets the soft-start time. This pin can also be used for tracking and sequencing. |
| EN | 17 | I | Enable pin. Float or pull high to enable the device. Connect a resistor divider to this pin to implement adjustable under voltage lockout and hysteresis. |
| PGOOD | 18 | O | Open-drain power good indicator. It is asserted low if output voltage is outside if the PGOOD thresholds, VIN is low, EN is low, device is in thermal shutdown or device is in soft-start. |
Electrical Characteristics
TJ = -40°C to 150°C, VIN = 4.5 V to 17 V (unless otherwise noted)
| PARAMETER | PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|---|
| INPUT VOLTAGE | INPUT VOLTAGE | INPUT VOLTAGE | INPUT VOLTAGE | INPUT VOLTAGE | INPUT VOLTAGE | INPUT VOLTAGE |
| UVLO_rise | V (VIN) rising | 4.1 | 4.3 | V | ||
| UVLO_fall | VIN under-voltage lockout | V (VIN) falling | 3.7 | 3.9 | V | |
| UVLO_hys | Hysteresis VIN voltage | 0.2 | V | |||
| Ivin | Operating non-switching supply current | V (EN) = 5 V, V (FB) = 1.5 V | 580 | 800 | μA | |
| Ivin_sdn | Shutdown supply current | V (EN) = 0 V | 3 | 11 | μA | |
| ENABLE | ENABLE | ENABLE | ENABLE | ENABLE | ENABLE | ENABLE |
| Ven_rise | V (EN) rising | 1.20 | 1.26 | V | ||
| Ven_fall | EN threshold | V (EN) falling | 1.1 | 1.15 | V | |
| Ven_hys | EN pin threshold voltage hysteresis | 50 | mV | |||
| Ip | EN pin sourcing current | V (EN) = 1.1V | 1.2 | μA | ||
| Iph | EN pin sourcing current | V (EN) = 1.3V | 4.8 | μA | ||
| Ih | EN pin hysteresis current | 3.6 | μA | |||
| FB | FB | FB | FB | FB | FB | FB |
| V | Regulated FB voltage | T J = 25°C | 596 | 600 | 604 | mV |
| FB | 595 | 600 | 605 | mV | ||
| ERROR AMPLIFIER | ERROR AMPLIFIER | ERROR AMPLIFIER | ERROR AMPLIFIER | ERROR AMPLIFIER | ERROR AMPLIFIER | ERROR AMPLIFIER |
| gmea | Error Amplifier Transconductance (gm) Error Amplifier DC gain | -2 μA < I (COMP) < 2 μA, V (COMP) = 1 V | 1100 80 | μA/V dB | ||
| Icomp_src | Error Amplifier source current | V (FB) = 0 V | 100 | μA | ||
| Icomp_snk | Error Amplifier sink current | V (FB) = 2 V | -100 | μA | ||
| gmps | Power Stage Transconductance | 17 | A/V | |||
| SOFT-START | SOFT-START | SOFT-START | SOFT-START | SOFT-START | SOFT-START | SOFT-START |
| Iss | Soft-start current | 5 | μA | |||
| V (SS/TRK) to V (FB) matching | V (SS/TRK) = 0.4 V | 25 | mV |
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Voltage | VIN | -0.3 | 19 | V |
| Voltage | BOOT | -0.3 | 27 | V |
| Voltage | BOOT (10 ns transient) | -0.3 | 30 | V |
| Voltage | BOOT (vs SW) | -0.3 | 7 | V |
| Voltage | SW | -1 | 20 | V |
| Voltage | SW (10 ns transient) | -3 | 23 | V |
| Voltage | EN, SS/TRK, PGOOD, RT/CLK, FB, COMP | -0.3 | 6.5 | V |
| Operating Junction Temperature Range, T J | Operating Junction Temperature Range, T J | -40 | 150 | °C |
| Storage Temperature Range, T STG | Storage Temperature Range, T STG | -55 | 150 | °C |
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| Parameter | Parameter | MIN | NOM | MAX | UNIT |
|---|---|---|---|---|---|
| V IN | Input voltage range | 4.5 | 17 | V | |
| V OUT | Output Voltage | 0.6 | 12 | V | |
| I OUT | Output current | 4 | A | ||
| T J | Operating junction temperature | -40 | 150 | °C | |
| f SW | Switching Frequency (RT mode and PLL mode) | 200 | 1600 | kHz |
Thermal Information
| THERMAL METRIC (1) | TPS54424 RNV PINS | UNIT | |
|---|---|---|---|
| 18 | |||
| Theta JA | Junction-to-ambient thermal resistance JEDEC | 57.1 | °C/W |
| Theta JA | Junction-to-ambient thermal resistance EVM | 34 | °C/W |
| Theta JCtop | Junction-to-case (top) thermal resistance | 26.3 | °C/W |
| Theta JB | Junction-to-board thermal resistance | 18.8 | °C/W |
| Psi JT | Junction-to-top characterization parameter | 0.8 | °C/W |
| Psi JB | Junction-to-board characterization parameter | 18.8 | °C/W |
| Theta JCbot | Junction-to-case (bottom) thermal resistance | 1.2 | °C/W |
Typical Application
The TPS54424 is a synchronous buck converter designed for 4.5 V to 17 V input and 4-A load. This procedure illustrates the design of a high-frequency switching regulator using ceramic output capacitors. Alternatively the WEBENCH ® software can be used to generate a complete design. The WEBENCH ® software uses an interactive design procedure and accesses a comprehensive database of components when generating a design. This section presents a simplified discussion of the design process.
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| TPS54424RNVR | Texas Instruments | |
| TPS54424RNVT | Texas Instruments | 18-PowerVFQFN |
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