Part: TPS565208 from Texas Instruments

Type: Synchronous Step-Down Voltage Regulator

Description: A simple, easy-to-use, 4.5–17 V input, 5-A synchronous step-down converter with integrated 31-mΩ and 16-mΩ FETs, employing D-CAP2™ mode control for fast transient response.

Operating Conditions:

• Supply voltage: 4.5–17 V
• Operating temperature: -40 to 125 °C (junction)
• Output voltage range: 0.76 V to 7 V
• Switching frequency: 500 kHz

Absolute Maximum Ratings:

• Max supply voltage (VIN): 19 V
• Max continuous current: 5 A (output current)
• Max junction/storage temperature: 150 °C

Key Specs:

• Operating (non-switching) supply current: 590 µA (typ, VIN = 12 V, EN = 5 V, VFB = 1 V)
• Shutdown supply current: 0.8 µA (typ, VIN = 12 V, EN = 0 V)
• VFB threshold voltage: 760 mV (typ)
• High-side switch resistance (RDS(on)h): 31 mΩ (typ, TA = 25°C, VBST – VSW= 5.5 V)
• Low-side switch resistance (RDS(on)l): 16 mΩ (typ, TA = 25°C)
• Current limit (IOCL): 6.7 A (typ)
• Switching frequency (FSW): 500 kHz (typ, VIN = 12 V, IOUT = 3 A)
• Soft-start time (tSS): 1.0 ms (typ)

Features:

• 5-A Maximum Output Current
• Integrated 31-mΩ and 16-mΩ FETs
• D-CAP2™ Mode Control with Fast Transient Response
• Input Voltage Range: 4.5 V to 17 V
• Output Voltage Range: 0.76 V to 7 V
• Continuous Current Mode
• 500-kHz Switching Frequency
• Low Shutdown Current of Less than 1 μA
• 1% Feedback Voltage Accuracy
• Startup from Pre-biased Output Voltage
• Cycle-by-Cycle Current Limit
• Hiccup-mode Overcurrent Protection
• Non-Latch UVP and TSD Protections
• Fixed Soft Start: 1.0 ms
• Create a Custom Design Using the TPS565208 With the WEBENCH® Power Designer

Applications:

• Digital TV Power Supply
• High Definition Blu-ray™ Disc Players
• Networking Home Terminal
• Digital Set Top Box (STB)
• Surveillance

Package:

• DDC (6) (1.60 mm × 2.90 mm)

• 5-A Maximum Output Current
• Integrated 31-m Ω and 16-m Ω FETs
• D-CAP2™ Mode Control with Fast Transient Response
• Input Voltage Range: 4.5 V to 17 V
• Output Voltage Range: 0.76 V to 7 V
• Continuous Current Mode
• 500-kHz Switching Frequency
• Low Shutdown Current of Less than 1 μA
• 1% Feedback Voltage Accuracy
• Startup from Pre-biased Output Voltage
• Cycle-by-Cycle Current Limit
• Hiccup-mode Overcurrent Protection
• Non-Latch UVP and TSD Protections
• Fixed Soft Start: 1.0 ms
• Create a Custom Design Using the TPS565208 With the WEBENCH® Power Designer

• Digital TV Power Supply
• High Definition Blu-ray™ Disc Players
• Networking Home Terminal
• Digital Set Top Box (STB)
• Surveillance

Simplified Schematic

TPS565208 Pinout – DDC-6 Package

Notes

• DDC package is a 6-pin small outline package (SOT variant)
• Pin numbers confirmed from package diagram (top view)
• GND and VIN are power pins; VBST is bootstrap supply for gate driver
• SW is the switching node output; VFB is the feedback input for regulation
• EN is the enable/shutdown control input

T^J = –40°C to 125°C, VIN = 12 V (unless otherwise noted)

over operating free-air temperature range (unless otherwise noted)(1)

⁽¹⁾ Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

over operating free-air temperature range (unless otherwise noted)

⁽¹⁾ For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.

⁽²⁾ JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

The device is a typical step-down DC-DC converter for converting a higher dc voltage to a lower dc voltage with a maximum available output current of 5 A. The following design procedure can be used to select component values for the TPS565208. Alternately, the WEBENCH® software may be used to generate a complete design. The WEBENCH software uses an iterative design procedure and accesses a comprehensive database of components when generating a design. This section presents a simplified discussion of the design process.